- 04 Feb, 2020 1 commit
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Al Viro authored
don't bother with the byte-by-byte loops, etc. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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- 03 Feb, 2020 5 commits
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Carlos Maiolino authored
FIBMAP receives an integer from userspace which is then implicitly converted into sector_t to be passed to bmap(). No check is made to ensure userspace didn't send a negative block number, which can end up in an underflow, and returning to userspace a corrupted block address. As a side-effect, the underflow caused by a negative block here, will trigger the WARN() in iomap_bmap_actor(), which is how this issue was first discovered. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Carlos Maiolino authored
Now we have the possibility of proper error return in bmap, use bmap() function in ioctl_fibmap() instead of calling ->bmap method directly. Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Carlos Maiolino authored
Replace direct ->bmap calls by bmap() method. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Carlos Maiolino authored
Replace the direct usage of ->bmap method by a bmap() call. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Carlos Maiolino authored
By now, bmap() will either return the physical block number related to the requested file offset or 0 in case of error or the requested offset maps into a hole. This patch makes the needed changes to enable bmap() to proper return errors, using the return value as an error return, and now, a pointer must be passed to bmap() to be filled with the mapped physical block. It will change the behavior of bmap() on return: - negative value in case of error - zero on success or map fell into a hole In case of a hole, the *block will be zero too Since this is a prep patch, by now, the only error return is -EINVAL if ->bmap doesn't exist. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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- 05 Jan, 2020 7 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linuxLinus Torvalds authored
Pull RISC-V fixes from Paul Walmsley: "Several fixes for RISC-V: - Fix function graph trace support - Prefix the CSR IRQ_* macro names with "RV_", to avoid collisions with macros elsewhere in the Linux kernel tree named "IRQ_TIMER" - Use __pa_symbol() when computing the physical address of a kernel symbol, rather than __pa() - Mark the RISC-V port as supporting GCOV One DT addition: - Describe the L2 cache controller in the FU540 DT file One documentation update: - Add patch acceptance guideline documentation" * tag 'riscv/for-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: Documentation: riscv: add patch acceptance guidelines riscv: prefix IRQ_ macro names with an RV_ namespace clocksource: riscv: add notrace to riscv_sched_clock riscv: ftrace: correct the condition logic in function graph tracer riscv: dts: Add DT support for SiFive L2 cache controller riscv: gcov: enable gcov for RISC-V riscv: mm: use __pa_symbol for kernel symbols
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Paul Walmsley authored
Formalize, in kernel documentation, the patch acceptance policy for arch/riscv. In summary, it states that as maintainers, we plan to only accept patches for new modules or extensions that have been frozen or ratified by the RISC-V Foundation. We've been following these guidelines for the past few months. In the meantime, we've received quite a bit of feedback that it would be helpful to have these guidelines formally documented. Based on a suggestion from Matthew Wilcox, we also add a link to this file to Documentation/process/index.rst, to make this document easier to find. The format of this document has also been changed to align to the format outlined in the maintainer entry profiles, in accordance with comments from Jon Corbet and Dan Williams. Signed-off-by:
Paul Walmsley <paul.walmsley@sifive.com> Reviewed-by:
Palmer Dabbelt <palmerdabbelt@google.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Krste Asanovic <krste@berkeley.edu> Cc: Andrew Waterman <waterman@eecs.berkeley.edu> Cc: Matthew Wilcox <willy@infradead.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jonathan Corbet <corbet@lwn.net>
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Paul Walmsley authored
"IRQ_TIMER", used in the arch/riscv CSR header file, is a sufficiently generic macro name that it's used by several source files across the Linux code base. Some of these other files ultimately include the arch/riscv CSR include file, causing collisions. Fix by prefixing the RISC-V csr.h IRQ_ macro names with an RV_ prefix. Fixes: a4c3733d ("riscv: abstract out CSR names for supervisor vs machine mode") Reported-by:
Olof Johansson <olof@lixom.net> Acked-by:
Olof Johansson <olof@lixom.net> Signed-off-by:
Paul Walmsley <paul.walmsley@sifive.com>
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Zong Li authored
When enabling ftrace graph tracer, it gets the tracing clock in ftrace_push_return_trace(). Eventually, it invokes riscv_sched_clock() to get the clock value. If riscv_sched_clock() isn't marked with 'notrace', it will call ftrace_push_return_trace() and cause infinite loop. The result of failure as follow: command: echo function_graph >current_tracer [ 46.176787] Unable to handle kernel paging request at virtual address ffffffe04fb38c48 [ 46.177309] Oops [#1] [ 46.177478] Modules linked in: [ 46.177770] CPU: 0 PID: 256 Comm: $d Not tainted 5.5.0-rc1 #47 [ 46.177981] epc: ffffffe00035e59a ra : ffffffe00035e57e sp : ffffffe03a7569b0 [ 46.178216] gp : ffffffe000d29b90 tp : ffffffe03a756180 t0 : ffffffe03a756968 [ 46.178430] t1 : ffffffe00087f408 t2 : ffffffe03a7569a0 s0 : ffffffe03a7569f0 [ 46.178643] s1 : ffffffe00087f408 a0 : 0000000ac054cda4 a1 : 000000000087f411 [ 46.178856] a2 : 0000000ac054cda4 a3 : 0000000000373ca0 a4 : ffffffe04fb38c48 [ 46.179099] a5 : 00000000153e22a8 a6 : 00000000005522ff a7 : 0000000000000005 [ 46.179338] s2 : ffffffe03a756a90 s3 : ffffffe00032811c s4 : ffffffe03a756a58 [ 46.179570] s5 : ffffffe000d29fe0 s6 : 0000000000000001 s7 : 0000000000000003 [ 46.179809] s8 : 0000000000000003 s9 : 0000000000000002 s10: 0000000000000004 [ 46.180053] s11: 0000000000000000 t3 : 0000003fc815749c t4 : 00000000000efc90 [ 46.180293] t5 : ffffffe000d29658 t6 : 0000000000040000 [ 46.180482] status: 0000000000000100 badaddr: ffffffe04fb38c48 cause: 000000000000000f Signed-off-by:
Zong Li <zong.li@sifive.com> Reviewed-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> [paul.walmsley@sifive.com: cleaned up patch description] Fixes: 92e0d143 ("clocksource/drivers/riscv_timer: Provide the sched_clock") Cc: stable@vger.kernel.org Signed-off-by:
Paul Walmsley <paul.walmsley@sifive.com>
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "17 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: hexagon: define ioremap_uc ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less ocfs2: call journal flush to mark journal as empty after journal recovery when mount mm/hugetlb: defer freeing of huge pages if in non-task context mm/gup: fix memory leak in __gup_benchmark_ioctl mm/oom: fix pgtables units mismatch in Killed process message fs/posix_acl.c: fix kernel-doc warnings hexagon: work around compiler crash hexagon: parenthesize registers in asm predicates fs/namespace.c: make to_mnt_ns() static fs/nsfs.c: include headers for missing declarations fs/direct-io.c: include fs/internal.h for missing prototype mm: move_pages: return valid node id in status if the page is already on the target node memcg: account security cred as well to kmemcg kcov: fix struct layout for kcov_remote_arg mm/zsmalloc.c: fix the migrated zspage statistics. mm/memory_hotplug: shrink zones when offlining memory
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Linus Torvalds authored
Merge tag 'apparmor-pr-2020-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor Pull apparmor fixes from John Johansen: - performance regression: only get a label reference if the fast path check fails - fix aa_xattrs_match() may sleep while holding a RCU lock - fix bind mounts aborting with -ENOMEM * tag 'apparmor-pr-2020-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock apparmor: only get a label reference if the fast path check fails apparmor: fix bind mounts aborting with -ENOMEM
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- 04 Jan, 2020 21 commits
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John Johansen authored
aa_xattrs_match() is unfortunately calling vfs_getxattr_alloc() from a context protected by an rcu_read_lock. This can not be done as vfs_getxattr_alloc() may sleep regardles of the gfp_t value being passed to it. Fix this by breaking the rcu_read_lock on the policy search when the xattr match feature is requested and restarting the search if a policy changes occur. Fixes: 8e51f908 ("apparmor: Add support for attaching profiles via xattr, presence and value") Reported-by:
Jia-Ju Bai <baijiaju1990@gmail.com> Reported-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
John Johansen <john.johansen@canonical.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mips/linuxLinus Torvalds authored
Pull MIPS fixes from Paul Burton: "A collection of MIPS fixes: - Fill the struct cacheinfo shared_cpu_map field with sensible values, notably avoiding issues with perf which was unhappy in the absence of these values. - A boot fix for Loongson 2E & 2F machines which was fallout from some refactoring performed this cycle. - A Kconfig dependency fix for the Loongson CPU HWMon driver. - A couple of VDSO fixes, ensuring gettimeofday() behaves appropriately for kernel configurations that don't include support for a clocksource the VDSO can use & fixing the calling convention for the n32 & n64 VDSOs which would previously clobber the $gp/$28 register. - A build fix for vmlinuz compressed images which were inappropriately building with -fsanitize-coverage despite not being part of the kernel proper, then failing to link due to the missing __sanitizer_cov_trace_pc() function. - A couple of eBPF JIT fixes, including disabling it for MIPS32 due to a large number of issues with the code generated there & reflecting ISA dependencies in Kconfig to enforce that systems which don't support the JIT must include the interpreter" * tag 'mips_fixes_5.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: Avoid VDSO ABI breakage due to global register variable MIPS: BPF: eBPF JIT: check for MIPS ISA compliance in Kconfig MIPS: BPF: Disable MIPS32 eBPF JIT MIPS: Prevent link failure with kcov instrumentation MIPS: Kconfig: Use correct form for 'depends on' mips: Fix gettimeofday() in the vdso library MIPS: Fix boot on Fuloong2 systems mips: cacheinfo: report shared CPU map
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Nick Desaulniers authored
Similar to commit 38e45d81 ("sparc64: implement ioremap_uc") define ioremap_uc for hexagon to avoid errors from -Wimplicit-function-definition. Link: http://lkml.kernel.org/r/20191209222956.239798-2-ndesaulniers@google.com Link: https://github.com/ClangBuiltLinux/linux/issues/797 Fixes: e537654b ("lib: devres: add a helper function for ioremap_uc") Signed-off-by:
Nick Desaulniers <ndesaulniers@google.com> Suggested-by:
Nathan Chancellor <natechancellor@gmail.com> Acked-by:
Brian Cain <bcain@codeaurora.org> Cc: Lee Jones <lee.jones@linaro.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Tuowen Zhao <ztuowen@gmail.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexios Zavras <alexios.zavras@intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Will Deacon <will@kernel.org> Cc: Richard Fontana <rfontana@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Gang He authored
Because ocfs2_get_dlm_debug() function is called once less here, ocfs2 file system will trigger the system crash, usually after ocfs2 file system is unmounted. This system crash is caused by a generic memory corruption, these crash backtraces are not always the same, for exapmle, ocfs2: Unmounting device (253,16) on (node 172167785) general protection fault: 0000 [#1] SMP PTI CPU: 3 PID: 14107 Comm: fence_legacy Kdump: Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__kmalloc+0xa5/0x2a0 Code: 00 00 4d 8b 07 65 4d 8b RSP: 0018:ffffaa1fc094bbe8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: d310a8800d7a3faf RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000dc0 RDI: ffff96e68fc036c0 RBP: d310a8800d7a3faf R08: ffff96e6ffdb10a0 R09: 00000000752e7079 R10: 000000000001c513 R11: 0000000004091041 R12: 0000000000000dc0 R13: 0000000000000039 R14: ffff96e68fc036c0 R15: ffff96e68fc036c0 FS: 00007f699dfba540(0000) GS:ffff96e6ffd80000(0000) knlGS:00000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f3a9d9b768 CR3: 000000002cd1c000 CR4: 00000000000006e0 Call Trace: ext4_htree_store_dirent+0x35/0x100 [ext4] htree_dirblock_to_tree+0xea/0x290 [ext4] ext4_htree_fill_tree+0x1c1/0x2d0 [ext4] ext4_readdir+0x67c/0x9d0 [ext4] iterate_dir+0x8d/0x1a0 __x64_sys_getdents+0xab/0x130 do_syscall_64+0x60/0x1f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f699d33a9fb This regression problem was introduced by commit e581595e ("ocfs: no need to check return value of debugfs_create functions"). Link: http://lkml.kernel.org/r/20191225061501.13587-1-ghe@suse.com Fixes: e581595e ("ocfs: no need to check return value of debugfs_create functions") Signed-off-by:
Gang He <ghe@suse.com> Acked-by:
Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Cc: <stable@vger.kernel.org> [5.3+] Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kai Li authored
If journal is dirty when mount, it will be replayed but jbd2 sb log tail cannot be updated to mark a new start because journal->j_flag has already been set with JBD2_ABORT first in journal_init_common. When a new transaction is committed, it will be recored in block 1 first(journal->j_tail is set to 1 in journal_reset). If emergency restart happens again before journal super block is updated unfortunately, the new recorded trans will not be replayed in the next mount. The following steps describe this procedure in detail. 1. mount and touch some files 2. these transactions are committed to journal area but not checkpointed 3. emergency restart 4. mount again and its journals are replayed 5. journal super block's first s_start is 1, but its s_seq is not updated 6. touch a new file and its trans is committed but not checkpointed 7. emergency restart again 8. mount and journal is dirty, but trans committed in 6 will not be replayed. This exception happens easily when this lun is used by only one node. If it is used by multi-nodes, other node will replay its journal and its journal super block will be updated after recovery like what this patch does. ocfs2_recover_node->ocfs2_replay_journal. The following jbd2 journal can be generated by touching a new file after journal is replayed, and seq 15 is the first valid commit, but first seq is 13 in journal super block. logdump: Block 0: Journal Superblock Seq: 0 Type: 4 (JBD2_SUPERBLOCK_V2) Blocksize: 4096 Total Blocks: 32768 First Block: 1 First Commit ID: 13 Start Log Blknum: 1 Error: 0 Feature Compat: 0 Feature Incompat: 2 block64 Feature RO compat: 0 Journal UUID: 4ED3822C54294467A4F8E87D2BA4BC36 FS Share Cnt: 1 Dynamic Superblk Blknum: 0 Per Txn Block Limit Journal: 0 Data: 0 Block 1: Journal Commit Block Seq: 14 Type: 2 (JBD2_COMMIT_BLOCK) Block 2: Journal Descriptor Seq: 15 Type: 1 (JBD2_DESCRIPTOR_BLOCK) No. Blocknum Flags 0. 587 none UUID: 00000000000000000000000000000000 1. 8257792 JBD2_FLAG_SAME_UUID 2. 619 JBD2_FLAG_SAME_UUID 3. 24772864 JBD2_FLAG_SAME_UUID 4. 8257802 JBD2_FLAG_SAME_UUID 5. 513 JBD2_FLAG_SAME_UUID JBD2_FLAG_LAST_TAG ... Block 7: Inode Inode: 8257802 Mode: 0640 Generation: 57157641 (0x3682809) FS Generation: 2839773110 (0xa9437fb6) CRC32: 00000000 ECC: 0000 Type: Regular Attr: 0x0 Flags: Valid Dynamic Features: (0x1) InlineData User: 0 (root) Group: 0 (root) Size: 7 Links: 1 Clusters: 0 ctime: 0x5de5d870 0x11104c61 -- Tue Dec 3 11:37:20.286280801 2019 atime: 0x5de5d870 0x113181a1 -- Tue Dec 3 11:37:20.288457121 2019 mtime: 0x5de5d870 0x11104c61 -- Tue Dec 3 11:37:20.286280801 2019 dtime: 0x0 -- Thu Jan 1 08:00:00 1970 ... Block 9: Journal Commit Block Seq: 15 Type: 2 (JBD2_COMMIT_BLOCK) The following is journal recovery log when recovering the upper jbd2 journal when mount again. syslog: ocfs2: File system on device (252,1) was not unmounted cleanly, recovering it. fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 0 fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 1 fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 2 fs/jbd2/recovery.c:(jbd2_journal_recover, 278): JBD2: recovery, exit status 0, recovered transactions 13 to 13 Due to first commit seq 13 recorded in journal super is not consistent with the value recorded in block 1(seq is 14), journal recovery will be terminated before seq 15 even though it is an unbroken commit, inode 8257802 is a new file and it will be lost. Link: http://lkml.kernel.org/r/20191217020140.2197-1-li.kai4@h3c.comSigned-off-by:
Kai Li <li.kai4@h3c.com> Reviewed-by:
Joseph Qi <joseph.qi@linux.alibaba.com> Reviewed-by:
Changwei Ge <gechangwei@live.cn> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Waiman Long authored
The following lockdep splat was observed when a certain hugetlbfs test was run: ================================ WARNING: inconsistent lock state 4.18.0-159.el8.x86_64+debug #1 Tainted: G W --------- - - -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/30/0 [HC0[0]:SC1[1]:HE1:SE0] takes: ffffffff9acdc038 (hugetlb_lock){+.?.}, at: free_huge_page+0x36f/0xaa0 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x14f/0x3b0 _raw_spin_lock+0x30/0x70 __nr_hugepages_store_common+0x11b/0xb30 hugetlb_sysctl_handler_common+0x209/0x2d0 proc_sys_call_handler+0x37f/0x450 vfs_write+0x157/0x460 ksys_write+0xb8/0x170 do_syscall_64+0xa5/0x4d0 entry_SYSCALL_64_after_hwframe+0x6a/0xdf irq event stamp: 691296 hardirqs last enabled at (691296): [<ffffffff99bb034b>] _raw_spin_unlock_irqrestore+0x4b/0x60 hardirqs last disabled at (691295): [<ffffffff99bb0ad2>] _raw_spin_lock_irqsave+0x22/0x81 softirqs last enabled at (691284): [<ffffffff97ff0c63>] irq_enter+0xc3/0xe0 softirqs last disabled at (691285): [<ffffffff97ff0ebe>] irq_exit+0x23e/0x2b0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(hugetlb_lock); <Interrupt> lock(hugetlb_lock); *** DEADLOCK *** : Call Trace: <IRQ> __lock_acquire+0x146b/0x48c0 lock_acquire+0x14f/0x3b0 _raw_spin_lock+0x30/0x70 free_huge_page+0x36f/0xaa0 bio_check_pages_dirty+0x2fc/0x5c0 clone_endio+0x17f/0x670 [dm_mod] blk_update_request+0x276/0xe50 scsi_end_request+0x7b/0x6a0 scsi_io_completion+0x1c6/0x1570 blk_done_softirq+0x22e/0x350 __do_softirq+0x23d/0xad8 irq_exit+0x23e/0x2b0 do_IRQ+0x11a/0x200 common_interrupt+0xf/0xf </IRQ> Both the hugetbl_lock and the subpool lock can be acquired in free_huge_page(). One way to solve the problem is to make both locks irq-safe. However, Mike Kravetz had learned that the hugetlb_lock is held for a linear scan of ALL hugetlb pages during a cgroup reparentling operation. So it is just too long to have irq disabled unless we can break hugetbl_lock down into finer-grained locks with shorter lock hold times. Another alternative is to defer the freeing to a workqueue job. This patch implements the deferred freeing by adding a free_hpage_workfn() work function to do the actual freeing. The free_huge_page() call in a non-task context saves the page to be freed in the hpage_freelist linked list in a lockless manner using the llist APIs. The generic workqueue is used to process the work, but a dedicated workqueue can be used instead if it is desirable to have the huge page freed ASAP. Thanks to Kirill Tkhai <ktkhai@virtuozzo.com> for suggesting the use of llist APIs which simplfy the code. Link: http://lkml.kernel.org/r/20191217170331.30893-1-longman@redhat.comSigned-off-by:
Waiman Long <longman@redhat.com> Reviewed-by:
Mike Kravetz <mike.kravetz@oracle.com> Acked-by:
Davidlohr Bueso <dbueso@suse.de> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Navid Emamdoost authored
In the implementation of __gup_benchmark_ioctl() the allocated pages should be released before returning in case of an invalid cmd. Release pages via kvfree(). [akpm@linux-foundation.org: rework code flow, return -EINVAL rather than -1] Link: http://lkml.kernel.org/r/20191211174653.4102-1-navid.emamdoost@gmail.com Fixes: 714a3a1e ("mm/gup_benchmark.c: add additional pinning methods") Signed-off-by:
Navid Emamdoost <navid.emamdoost@gmail.com> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Reviewed-by:
John Hubbard <jhubbard@nvidia.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Hildenbrand <david@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Ilya Dryomov authored
pr_err() expects kB, but mm_pgtables_bytes() returns the number of bytes. As everything else is printed in kB, I chose to fix the value rather than the string. Before: [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name ... [ 1878] 1000 1878 217253 151144 1269760 0 0 python ... Out of memory: Killed process 1878 (python) total-vm:869012kB, anon-rss:604572kB, file-rss:4kB, shmem-rss:0kB, UID:1000 pgtables:1269760kB oom_score_adj:0 After: [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name ... [ 1436] 1000 1436 217253 151890 1294336 0 0 python ... Out of memory: Killed process 1436 (python) total-vm:869012kB, anon-rss:607516kB, file-rss:44kB, shmem-rss:0kB, UID:1000 pgtables:1264kB oom_score_adj:0 Link: http://lkml.kernel.org/r/20191211202830.1600-1-idryomov@gmail.com Fixes: 70cb6d26 ("mm/oom: add oom_score_adj and pgtables to Killed process message") Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Reviewed-by:
Andrew Morton <akpm@linux-foundation.org> Acked-by:
David Rientjes <rientjes@google.com> Acked-by:
Michal Hocko <mhocko@suse.com> Cc: Edward Chron <echron@arista.com> Cc: David Rientjes <rientjes@google.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Randy Dunlap authored
Fix kernel-doc warnings in fs/posix_acl.c. Also fix one typo (setgit -> setgid). fs/posix_acl.c:647: warning: Function parameter or member 'inode' not described in 'posix_acl_update_mode' fs/posix_acl.c:647: warning: Function parameter or member 'mode_p' not described in 'posix_acl_update_mode' fs/posix_acl.c:647: warning: Function parameter or member 'acl' not described in 'posix_acl_update_mode' Link: http://lkml.kernel.org/r/29b0dc46-1f28-a4e5-b1d0-ba2b65629779@infradead.org Fixes: 07393101 ("posix_acl: Clear SGID bit when setting file permissions") Signed-off-by:
Randy Dunlap <rdunlap@infradead.org> Acked-by:
Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by:
Jan Kara <jack@suse.cz> Cc: Jan Kara <jack@suse.cz> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Nick Desaulniers authored
Clang cannot translate the string "r30" into a valid register yet. Link: https://github.com/ClangBuiltLinux/linux/issues/755 Link: http://lkml.kernel.org/r/20191028155722.23419-1-ndesaulniers@google.comSigned-off-by:
Nick Desaulniers <ndesaulniers@google.com> Suggested-by:
Sid Manning <sidneym@quicinc.com> Reviewed-by:
Brian Cain <bcain@codeaurora.org> Cc: Allison Randal <allison@lohutok.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Richard Fontana <rfontana@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Nick Desaulniers authored
Hexagon requires that register predicates in assembly be parenthesized. Link: https://github.com/ClangBuiltLinux/linux/issues/754 Link: http://lkml.kernel.org/r/20191209222956.239798-3-ndesaulniers@google.comSigned-off-by:
Nick Desaulniers <ndesaulniers@google.com> Suggested-by:
Sid Manning <sidneym@codeaurora.org> Acked-by:
Brian Cain <bcain@codeaurora.org> Cc: Lee Jones <lee.jones@linaro.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Tuowen Zhao <ztuowen@gmail.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexios Zavras <alexios.zavras@intel.com> Cc: Allison Randal <allison@lohutok.net> Cc: Will Deacon <will@kernel.org> Cc: Richard Fontana <rfontana@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Eric Biggers authored
Make to_mnt_ns() static to address the following 'sparse' warning: fs/namespace.c:1731:22: warning: symbol 'to_mnt_ns' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20191209234830.156260-1-ebiggers@kernel.orgSigned-off-by:
Eric Biggers <ebiggers@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Eric Biggers authored
Include linux/proc_fs.h and fs/internal.h to address the following 'sparse' warnings: fs/nsfs.c:41:32: warning: symbol 'ns_dentry_operations' was not declared. Should it be static? fs/nsfs.c:145:5: warning: symbol 'open_related_ns' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20191209234822.156179-1-ebiggers@kernel.orgSigned-off-by:
Eric Biggers <ebiggers@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Eric Biggers authored
Include fs/internal.h to address the following 'sparse' warning: fs/direct-io.c:591:5: warning: symbol 'sb_init_dio_done_wq' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20191209234544.128302-1-ebiggers@kernel.orgSigned-off-by:
Eric Biggers <ebiggers@google.com> Reviewed-by:
Jan Kara <jack@suse.cz> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Yang Shi authored
Felix Abecassis reports move_pages() would return random status if the pages are already on the target node by the below test program: int main(void) { const long node_id = 1; const long page_size = sysconf(_SC_PAGESIZE); const int64_t num_pages = 8; unsigned long nodemask = 1 << node_id; long ret = set_mempolicy(MPOL_BIND, &nodemask, sizeof(nodemask)); if (ret < 0) return (EXIT_FAILURE); void **pages = malloc(sizeof(void*) * num_pages); for (int i = 0; i < num_pages; ++i) { pages[i] = mmap(NULL, page_size, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_POPULATE | MAP_ANONYMOUS, -1, 0); if (pages[i] == MAP_FAILED) return (EXIT_FAILURE); } ret = set_mempolicy(MPOL_DEFAULT, NULL, 0); if (ret < 0) return (EXIT_FAILURE); int *nodes = malloc(sizeof(int) * num_pages); int *status = malloc(sizeof(int) * num_pages); for (int i = 0; i < num_pages; ++i) { nodes[i] = node_id; status[i] = 0xd0; /* simulate garbage values */ } ret = move_pages(0, num_pages, pages, nodes, status, MPOL_MF_MOVE); printf("move_pages: %ld\n", ret); for (int i = 0; i < num_pages; ++i) printf("status[%d] = %d\n", i, status[i]); } Then running the program would return nonsense status values: $ ./move_pages_bug move_pages: 0 status[0] = 208 status[1] = 208 status[2] = 208 status[3] = 208 status[4] = 208 status[5] = 208 status[6] = 208 status[7] = 208 This is because the status is not set if the page is already on the target node, but move_pages() should return valid status as long as it succeeds. The valid status may be errno or node id. We can't simply initialize status array to zero since the pages may be not on node 0. Fix it by updating status with node id which the page is already on. Link: http://lkml.kernel.org/r/1575584353-125392-1-git-send-email-yang.shi@linux.alibaba.com Fixes: a49bd4d7 ("mm, numa: rework do_pages_move") Signed-off-by:
Yang Shi <yang.shi@linux.alibaba.com> Reported-by:
Felix Abecassis <fabecassis@nvidia.com> Tested-by:
Felix Abecassis <fabecassis@nvidia.com> Suggested-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
John Hubbard <jhubbard@nvidia.com> Acked-by:
Christoph Lameter <cl@linux.com> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Vlastimil Babka <vbabka@suse.cz> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: <stable@vger.kernel.org> [4.17+] Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Shakeel Butt authored
The cred_jar kmem_cache is already memcg accounted in the current kernel but cred->security is not. Account cred->security to kmemcg. Recently we saw high root slab usage on our production and on further inspection, we found a buggy application leaking processes. Though that buggy application was contained within its memcg but we observe much more system memory overhead, couple of GiBs, during that period. This overhead can adversely impact the isolation on the system. One source of high overhead we found was cred->security objects, which have a lifetime of at least the life of the process which allocated them. Link: http://lkml.kernel.org/r/20191205223721.40034-1-shakeelb@google.comSigned-off-by:
Shakeel Butt <shakeelb@google.com> Acked-by:
Chris Down <chris@chrisdown.name> Reviewed-by:
Roman Gushchin <guro@fb.com> Acked-by:
Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Andrey Konovalov authored
Make the layout of kcov_remote_arg the same for 32-bit and 64-bit code. This makes it more convenient to write userspace apps that can be compiled into 32-bit or 64-bit binaries and still work with the same 64-bit kernel. Also use proper __u32 types in uapi headers instead of unsigned ints. Link: http://lkml.kernel.org/r/9e91020876029cfefc9211ff747685eba9536426.1575638983.git.andreyknvl@google.com Fixes: eec028c9 ("kcov: remote coverage support") Signed-off-by:
Andrey Konovalov <andreyknvl@google.com> Acked-by:
Marco Elver <elver@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Felipe Balbi <balbi@kernel.org> Cc: Chunfeng Yun <chunfeng.yun@mediatek.com> Cc: "Jacky . Cao @ sony . com" <Jacky.Cao@sony.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Chanho Min authored
When zspage is migrated to the other zone, the zone page state should be updated as well, otherwise the NR_ZSPAGE for each zone shows wrong counts including proc/zoneinfo in practice. Link: http://lkml.kernel.org/r/1575434841-48009-1-git-send-email-chanho.min@lge.com Fixes: 91537fee ("mm: add NR_ZSMALLOC to vmstat") Signed-off-by:
Chanho Min <chanho.min@lge.com> Signed-off-by:
Jinsuk Choi <jjinsuk.choi@lge.com> Reviewed-by:
Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by:
Minchan Kim <minchan@kernel.org> Cc: <stable@vger.kernel.org> [4.9+] Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Hildenbrand authored
We currently try to shrink a single zone when removing memory. We use the zone of the first page of the memory we are removing. If that memmap was never initialized (e.g., memory was never onlined), we will read garbage and can trigger kernel BUGs (due to a stale pointer): BUG: unable to handle page fault for address: 000000000000353d #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] SMP PTI CPU: 1 PID: 7 Comm: kworker/u8:0 Not tainted 5.3.0-rc5-next-20190820+ #317 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.4 Workqueue: kacpi_hotplug acpi_hotplug_work_fn RIP: 0010:clear_zone_contiguous+0x5/0x10 Code: 48 89 c6 48 89 c3 e8 2a fe ff ff 48 85 c0 75 cf 5b 5d c3 c6 85 fd 05 00 00 01 5b 5d c3 0f 1f 840 RSP: 0018:ffffad2400043c98 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000200000000 RCX: 0000000000000000 RDX: 0000000000200000 RSI: 0000000000140000 RDI: 0000000000002f40 RBP: 0000000140000000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000140000 R13: 0000000000140000 R14: 0000000000002f40 R15: ffff9e3e7aff3680 FS: 0000000000000000(0000) GS:ffff9e3e7bb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000353d CR3: 0000000058610000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __remove_pages+0x4b/0x640 arch_remove_memory+0x63/0x8d try_remove_memory+0xdb/0x130 __remove_memory+0xa/0x11 acpi_memory_device_remove+0x70/0x100 acpi_bus_trim+0x55/0x90 acpi_device_hotplug+0x227/0x3a0 acpi_hotplug_work_fn+0x1a/0x30 process_one_work+0x221/0x550 worker_thread+0x50/0x3b0 kthread+0x105/0x140 ret_from_fork+0x3a/0x50 Modules linked in: CR2: 000000000000353d Instead, shrink the zones when offlining memory or when onlining failed. Introduce and use remove_pfn_range_from_zone(() for that. We now properly shrink the zones, even if we have DIMMs whereby - Some memory blocks fall into no zone (never onlined) - Some memory blocks fall into multiple zones (offlined+re-onlined) - Multiple memory blocks that fall into different zones Drop the zone parameter (with a potential dubious value) from __remove_pages() and __remove_section(). Link: http://lkml.kernel.org/r/20191006085646.5768-6-david@redhat.com Fixes: f1dd2cd1 ("mm, memory_hotplug: do not associate hotadded memory to zones until online") [visible after d0dc12e8] Signed-off-by:
David Hildenbrand <david@redhat.com> Reviewed-by:
Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@suse.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: <stable@vger.kernel.org> [5.0+] Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds authored
Pull dmaengine fixes from Vinod Koul: "A bunch of fixes for: - uninitialized dma_slave_caps access - virt-dma use after free in vchan_complete() - driver fixes for ioat, k3dma and jz4780" * tag 'dmaengine-fix-5.5-rc5' of git://git.infradead.org/users/vkoul/slave-dma: ioat: ioat_alloc_ring() failure handling. dmaengine: virt-dma: Fix access after free in vchan_complete() dmaengine: k3dma: Avoid null pointer traversal dmaengine: dma-jz4780: Also break descriptor chains on JZ4725B dmaengine: Fix access to uninitialized dma_slave_caps
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediaLinus Torvalds authored
Pull media fixes from Mauro Carvalho Chehab: - some fixes at CEC core to comply with HDMI 2.0 specs and fix some border cases - a fix at the transmission logic of the pulse8-cec driver - one alignment fix on a data struct at ipu3 when built with 32 bits * tag 'media/v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: media: intel-ipu3: Align struct ipu3_uapi_awb_fr_config_s to 32 bytes media: pulse8-cec: fix lost cec_transmit_attempt_done() call media: cec: check 'transmit_in_progress', not 'transmitting' media: cec: avoid decrementing transmit_queue_sz if it is 0 media: cec: CEC 2.0-only bcast messages were ignored
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- 03 Jan, 2020 6 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linuxLinus Torvalds authored
Pull btrfs fixes from David Sterba: "A few fixes for btrfs: - blkcg accounting problem with compression that could stall writes - setting up blkcg bio for compression crashes due to NULL bdev pointer - fix possible infinite loop in writeback for nocow files (here possible means almost impossible, 13 things that need to happen to trigger it)" * tag 'for-5.5-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: Btrfs: fix infinite loop during nocow writeback due to race btrfs: fix compressed write bio blkcg attribution btrfs: punt all bios created in btrfs_submit_compressed_write()
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: "Three fixes in here: - Fix for a missing split on default memory boundary mask (4G) (Ming) - Fix for multi-page read bio truncate (Ming) - Fix for null_blk zone close request handling (Damien)" * tag 'block-5.5-20200103' of git://git.kernel.dk/linux-block: null_blk: Fix REQ_OP_ZONE_CLOSE handling block: fix splitting segments on boundary masks block: add bio_truncate to fix guard_bio_eod
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - fix build error in usr/gen_initramfs_list.sh - fix libelf-dev dependency in deb-pkg build * tag 'kbuild-fixes-v5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild/deb-pkg: annotate libelf-dev dependency as :native gen_initramfs_list.sh: fix 'bad variable name' error
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git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linuxLinus Torvalds authored
Pull thread fixes from Christian Brauner: "Here are two fixes: - Panic earlier when global init exits to generate useable coredumps. Currently, when global init and all threads in its thread-group have exited we panic via: do_exit() -> exit_notify() -> forget_original_parent() -> find_child_reaper() This makes it hard to extract a useable coredump for global init from a kernel crashdump because by the time we panic exit_mm() will have already released global init's mm. We now panic slightly earlier. This has been a problem in certain environments such as Android. - Fix a race in assigning and reading taskstats for thread-groups with more than one thread. This patch has been waiting for quite a while since people disagreed on what the correct fix was at first" * tag 'for-linus-2020-01-03' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: exit: panic before exit_mm() on global init exit taskstats: fix data-race
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "Two more powerpc fixes for 5.5: - One commit to fix a build error when CONFIG_JUMP_LABEL=n, introduced by our recent fix to is_shared_processor(). - A commit marking some SLB related functions as notrace, as tracing them triggers warnings. Thanks to Jason A Donenfeld" * tag 'powerpc-5.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/spinlocks: Include correct header for static key powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "Nothing to worry at this stage but all nice small changes: - A regression fix for AMD GPU detection in HD-audio - A long-standing sleep-in-atomic fix for an ice1724 device - Usual suspects, the device-specific quirks for HD- and USB-audio" * tag 'sound-5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda/realtek - Enable the bass speaker of ASUS UX431FLC ALSA: ice1724: Fix sleep-in-atomic in Infrasonic Quartet support code ALSA: hda/realtek - Add Bass Speaker and fixed dac for bass speaker ALSA: hda - Apply sync-write workaround to old Intel platforms, too ALSA: hda/hdmi - fix atpx_present when CLASS is not VGA ALSA: usb-audio: fix set_format altsetting sanity check ALSA: hda/realtek - Add headset Mic no shutup for ALC283 ALSA: usb-audio: set the interface format after resume on Dell WD19
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