- 20 Feb, 2019 6 commits
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Julien Thierry authored
Commit 73839798 upstream. When setting a dummy iwmmxt context, create a local instance and use __copy_to_user both cases whether iwmmxt is being used or not. This has the benefit of disabling/enabling PAN once for the whole copy intead of once per write. Signed-off-by:
Julien Thierry <julien.thierry@arm.com> Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
David A. Long <dave.long@linaro.org> Reviewed-by:
Sasha Levin <sashal@kernel.org>
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Julien Thierry authored
Commit 5ca451cf upstream. When saving the ARM integer registers, use __copy_to_user() to copy them into user signal frame, rather than __put_user_error(). This has the benefit of disabling/enabling PAN once for the whole copy intead of once per write. Signed-off-by:
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Hauke Mehrtens authored
commit 6926e041 upstream. Musl provides its own ethhdr struct definition. Add a guard to prevent its definition of the appropriate musl header has already been included. glibc does not implement this header, but when glibc will implement this they can just define __UAPI_DEF_ETHHDR 0 to make it work with the kernel. Signed-off-by:
Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Jianchao Wang authored
[ Upstream commit 85bd6e61 ] Florian reported a io hung issue when fsync(). It should be triggered by following race condition. data + post flush a flush blk_flush_complete_seq case REQ_FSEQ_DATA blk_flush_queue_rq issued to driver blk_mq_dispatch_rq_list try to issue a flush req failed due to NON-NCQ command .queue_rq return BLK_STS_DEV_RESOURCE request completion req->end_io // doesn't check RESTART mq_flush_data_end_io case REQ_FSEQ_POSTFLUSH blk_kick_flush do nothing because previous flush has not been completed blk_mq_run_hw_queue insert rq to hctx->dispatch due to RESTART is still set, do nothing To fix this, replace the blk_mq_run_hw_queue in mq_flush_data_end_io with blk_mq_sched_restart to check and clear the RESTART flag. Fixes: bd166ef1 (blk-mq-sched: add framework for MQ capable IO schedulers) Reported-by:
Florian Stecker <m19@florianstecker.de> Tested-by:
Jianchao Wang <jianchao.w.wang@oracle.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Adrian Bunk authored
commit 37cf28d3 upstream. Works with ST M24M02. Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by:
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Adrian Bunk authored
commit 6c0c5dc3 upstream. Add new compatible to the device tree bindings. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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- 15 Feb, 2019 34 commits
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Greg Kroah-Hartman authored
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Linus Torvalds authored
commit cb5b020a upstream. This reverts commit 8099b047. It turns out that people do actually depend on the shebang string being truncated, and on the fact that an interpreter (like perl) will often just re-interpret it entirely to get the full argument list. Reported-by:
Samuel Dionne-Riel <samuel@dionne-riel.com> Acked-by:
Kees Cook <keescook@chromium.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman authored
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Xiubo Li authored
commit 3d27c4de upstream. Since mutex lock in irq hanler is useless currently, here will remove it together with it. This reverts commit 9421e45f. Reported-by: james.r.harris@intel.com CC: Ahsan Atta <ahsan.atta@intel.com> Signed-off-by:
Xiubo Li <xiubli@redhat.com> Signed-off-by:
Tommi Rantala <tommi.t.rantala@nokia.com> Signed-off-by:
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Xiubo Li authored
commit b34e9a15 upstream. The call trace: XXX/1910 is trying to acquire lock: (&mm->mmap_sem){++++++}, at: [<ffffffff97008c87>] might_fault+0x57/0xb0 but task is already holding lock: (&idev->info_lock){+.+...}, at: [<ffffffffc0638a06>] uio_write+0x46/0x130 [uio] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&idev->info_lock){+.+...}: [<ffffffff96f31fc9>] lock_acquire+0x99/0x1e0 [<ffffffff975edad3>] mutex_lock_nested+0x93/0x410 [<ffffffffc063873d>] uio_mmap+0x2d/0x170 [uio] [<ffffffff97016b58>] mmap_region+0x428/0x650 [<ffffffff97017138>] do_mmap+0x3b8/0x4e0 [<ffffffff96ffaba3>] vm_mmap_pgoff+0xd3/0x120 [<ffffffff97015261>] SyS_mmap_pgoff+0x1f1/0x270 [<ffffffff96e387c2>] SyS_mmap+0x22/0x30 [<ffffffff975ff315>] system_call_fastpath+0x1c/0x21 -> #0 (&mm->mmap_sem){++++++}: [<ffffffff96f30e9c>] __lock_acquire+0xdac/0x15f0 [<ffffffff96f31fc9>] lock_acquire+0x99/0x1e0 [<ffffffff97008cb4>] might_fault+0x84/0xb0 [<ffffffffc0638a74>] uio_write+0xb4/0x130 [uio] [<ffffffff9706ffa3>] vfs_write+0xc3/0x1f0 [<ffffffff97070e2a>] SyS_write+0x8a/0x100 [<ffffffff975ff315>] system_call_fastpath+0x1c/0x21 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&idev->info_lock); lock(&mm->mmap_sem); lock(&idev->info_lock); lock(&mm->mmap_sem); *** DEADLOCK *** 1 lock held by XXX/1910: #0: (&idev->info_lock){+.+...}, at: [<ffffffffc0638a06>] uio_write+0x46/0x130 [uio] stack backtrace: CPU: 0 PID: 1910 Comm: XXX Kdump: loaded Not tainted #1 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 05/19/2017 Call Trace: [<ffffffff975e9211>] dump_stack+0x19/0x1b [<ffffffff975e260a>] print_circular_bug+0x1f9/0x207 [<ffffffff96f2f6a7>] check_prevs_add+0x957/0x960 [<ffffffff96f30e9c>] __lock_acquire+0xdac/0x15f0 [<ffffffff96f2fb19>] ? mark_held_locks+0xb9/0x140 [<ffffffff96f31fc9>] lock_acquire+0x99/0x1e0 [<ffffffff97008c87>] ? might_fault+0x57/0xb0 [<ffffffff97008cb4>] might_fault+0x84/0xb0 [<ffffffff97008c87>] ? might_fault+0x57/0xb0 [<ffffffffc0638a74>] uio_write+0xb4/0x130 [uio] [<ffffffff9706ffa3>] vfs_write+0xc3/0x1f0 [<ffffffff9709349c>] ? fget_light+0xfc/0x510 [<ffffffff97070e2a>] SyS_write+0x8a/0x100 [<ffffffff975ff315>] system_call_fastpath+0x1c/0x21 Signed-off-by:
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Hailong Liu authored
commit e7de2590 upstream. uio_mmap has multiple fail paths to set return value to nonzero then goto out. However, it always returns *0* from the *out* at end, and this will mislead callers who check the return value of this function. Fixes: 57c5f4df ("uio: fix crash after the device is unregistered") CC: Xiubo Li <xiubli@redhat.com> Signed-off-by:
Hailong Liu <liu.hailong6@zte.com.cn> Cc: stable <stable@vger.kernel.org> Signed-off-by:
Jiang Biao <jiang.biao2@zte.com.cn> Signed-off-by:
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Xiubo Li authored
commit 57c5f4df upstream. For the target_core_user use case, after the device is unregistered it maybe still opened in user space, then the kernel will crash, like: [ 251.163692] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 251.163820] IP: [<ffffffffc0736213>] show_name+0x23/0x40 [uio] [ 251.163965] PGD 8000000062694067 PUD 62696067 PMD 0 [ 251.164097] Oops: 0000 [#1] SMP ... [ 251.165605] e1000 mptscsih mptbase drm_panel_orientation_quirks dm_mirror dm_region_hash dm_log dm_mod [ 251.166014] CPU: 0 PID: 13380 Comm: tcmu-runner Kdump: loaded Not tainted 3.10.0-916.el7.test.x86_64 #1 [ 251.166381] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 05/19/2017 [ 251.166747] task: ffff971eb91db0c0 ti: ffff971e9e384000 task.ti: ffff971e9e384000 [ 251.167137] RIP: 0010:[<ffffffffc0736213>] [<ffffffffc0736213>] show_name+0x23/0x40 [uio] [ 251.167563] RSP: 0018:ffff971e9e387dc8 EFLAGS: 00010282 [ 251.167978] RAX: 0000000000000000 RBX: ffff971e9e3f8000 RCX: ffff971eb8368d98 [ 251.168408] RDX: ffff971e9e3f8000 RSI: ffffffffc0738084 RDI: ffff971e9e3f8000 [ 251.168856] RBP: ffff971e9e387dd0 R08: ffff971eb8bc0018 R09: 0000000000000000 [ 251.169296] R10: 0000000000001000 R11: ffffffffa09d444d R12: ffffffffa1076e80 [ 251.169750] R13: ffff971e9e387f18 R14: 0000000000000001 R15: ffff971e9cfb1c80 [ 251.170213] FS: 00007ff37d175880(0000) GS:ffff971ebb600000(0000) knlGS:0000000000000000 [ 251.170693] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 251.171248] CR2: 0000000000000008 CR3: 00000000001f6000 CR4: 00000000003607f0 [ 251.172071] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 251.172640] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 251.173236] Call Trace: [ 251.173789] [<ffffffffa0c9b2d3>] dev_attr_show+0x23/0x60 [ 251.174356] [<ffffffffa0f561b2>] ? mutex_lock+0x12/0x2f [ 251.174892] [<ffffffffa0ac6d9f>] sysfs_kf_seq_show+0xcf/0x1f0 [ 251.175433] [<ffffffffa0ac54e6>] kernfs_seq_show+0x26/0x30 [ 251.175981] [<ffffffffa0a63be0>] seq_read+0x110/0x3f0 [ 251.176609] [<ffffffffa0ac5d45>] kernfs_fop_read+0xf5/0x160 [ 251.177158] [<ffffffffa0a3d3af>] vfs_read+0x9f/0x170 [ 251.177707] [<ffffffffa0a3e27f>] SyS_read+0x7f/0xf0 [ 251.178268] [<ffffffffa0f648af>] system_call_fastpath+0x1c/0x21 [ 251.178823] Code: 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 d3 e8 7e 96 56 e0 48 8b 80 d8 02 00 00 48 89 df 48 c7 c6 84 80 73 c0 <48> 8b 50 08 31 c0 e8 e2 67 44 e0 5b 48 98 5d c3 0f 1f 00 66 2e [ 251.180115] RIP [<ffffffffc0736213>] show_name+0x23/0x40 [uio] [ 251.180820] RSP <ffff971e9e387dc8> [ 251.181473] CR2: 0000000000000008 CC: Hamish Martin <hamish.martin@alliedtelesis.co.nz> CC: Mike Christie <mchristi@redhat.com> Reviewed-by:
Hamish Martin <hamish.martin@alliedtelesis.co.nz> Signed-off-by:
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Xiubo Li authored
commit 543af586 upstream. We are hitting a regression with the following commit: commit a93e7b33 Author: Hamish Martin <hamish.martin@alliedtelesis.co.nz> Date: Mon May 14 13:32:23 2018 +1200 uio: Prevent device destruction while fds are open The problem is the addition of spin_lock_irqsave in uio_write. This leads to hitting uio_write -> copy_from_user -> _copy_from_user -> might_fault and the logs filling up with sleeping warnings. I also noticed some uio drivers allocate memory, sleep, grab mutexes from callouts like open() and release and uio is now doing spin_lock_irqsave while calling them. Reported-by:
Mike Christie <mchristi@redhat.com> CC: Hamish Martin <hamish.martin@alliedtelesis.co.nz> Reviewed-by:
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Xiubo Li authored
commit 9421e45f upstream. Prepraing for changing to use mutex lock. Signed-off-by:
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Hamish Martin authored
commit a93e7b33 upstream. Prevent destruction of a uio_device while user space apps hold open file descriptors to that device. Further, access to the 'info' member of the struct uio_device is protected by spinlock. This is to ensure stale pointers to data not under control of the UIO subsystem are not dereferenced. Signed-off-by:
Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by:
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Hamish Martin authored
commit 81daa406 upstream. Drive all return paths for uio_write() through a single block at the end of the function. Signed-off-by:
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Jiri Olsa authored
commit 692f5a22 upstream. Otherwise we fail on virtual machines with no support for specific HW events. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171009130712.14747-1-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@nokia.com> Signed-off-by:
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Jiri Olsa authored
commit f6a9820d upstream. We started to use group read whenever it's possible: 82bf311e perf stat: Use group read for event groups That breaks some of attr tests, this change adds the new possible read_format value. Signed-off-by:
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Jiri Olsa authored
commit 10836d9f upstream. The perf_event_attr::task is 1 by default for first (tracking) event in the session. Setting task=1 as default and adding task=0 for cases that need it. Signed-off-by:
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Sven Eckelmann authored
commit 9114daa8 upstream. The caller of ndo_start_xmit may not already have called skb_reset_mac_header. The returned value of skb_mac_header/eth_hdr therefore can be in the wrong position and even outside the current skbuff. This for example happens when the user binds to the device using a PF_PACKET-SOCK_RAW with enabled qdisc-bypass: int opt = 4; setsockopt(sock, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof(opt)); Since eth_hdr is used all over the codebase, the batadv_interface_tx function must always take care of resetting it. Fixes: c6c8fea2 ("net: Add batman-adv meshing protocol") Reported-by: syzbot+9d7405c7faa390e60b4e@syzkaller.appspotmail.com Reported-by: syzbot+7d20bc3f1ddddc0f9079@syzkaller.appspotmail.com Signed-off-by:
Sven Eckelmann <sven@narfation.org> Signed-off-by:
Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by:
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Sven Eckelmann authored
commit 955d3411 upstream. It is not allowed to use WARN* helpers on potential incorrect input from the user or transient problems because systems configured as panic_on_warn will reboot due to such a problem. A NULL return value of __dev_get_by_index can be caused by various problems which can either be related to the system configuration or problems (incorrectly returned network namespaces) in other (virtual) net_device drivers. batman-adv should not cause a (harmful) WARN in this situation and instead only report it via a simple message. Fixes: b7eddd0b ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface") Reported-by: syzbot+c764de0fcfadca9a8595@syzkaller.appspotmail.com Reported-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
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Florian Westphal authored
commit 35e61038 upstream. The check assumes that in transport mode, the first templates family must match the address family of the policy selector. Syzkaller managed to build a template using MODE_ROUTEOPTIMIZATION, with ipv4-in-ipv6 chain, leading to following splat: BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x1db/0x1854 Read of size 4 at addr ffff888063e57aa0 by task a.out/2050 xfrm_state_find+0x1db/0x1854 xfrm_tmpl_resolve+0x100/0x1d0 xfrm_resolve_and_create_bundle+0x108/0x1000 [..] Problem is that addresses point into flowi4 struct, but xfrm_state_find treats them as being ipv6 because it uses templ->encap_family is used (AF_INET6 in case of reproducer) rather than family (AF_INET). This patch inverts the logic: Enforce 'template family must match selector' EXCEPT for tunnel and BEET mode. In BEET and Tunnel mode, xfrm_tmpl_resolve_one will have remote/local address pointers changed to point at the addresses found in the template, rather than the flowi ones, so no oob read will occur. Reported-by: 3ntr0py1337@gmail.com Reported-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by:
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Ilya Dryomov authored
commit 4aac9228 upstream. con_fault() can transition the connection into STANDBY right after ceph_con_keepalive() clears STANDBY in clear_standby(): libceph user thread ceph-msgr worker ceph_con_keepalive() mutex_lock(&con->mutex) clear_standby(con) mutex_unlock(&con->mutex) mutex_lock(&con->mutex) con_fault() ... if KEEPALIVE_PENDING isn't set set state to STANDBY ... mutex_unlock(&con->mutex) set KEEPALIVE_PENDING set WRITE_PENDING This triggers warnings in clear_standby() when either ceph_con_send() or ceph_con_keepalive() get to clearing STANDBY next time. I don't see a reason to condition queue_con() call on the previous value of KEEPALIVE_PENDING, so move the setting of KEEPALIVE_PENDING into the critical section -- unlike WRITE_PENDING, KEEPALIVE_PENDING could have been a non-atomic flag. Reported-by: syzbot+acdeb633f6211ccdf886@syzkaller.appspotmail.com Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Tested-by:
Myungho Jung <mhjungk@gmail.com> Signed-off-by:
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Theodore Ts'o authored
commit 8fdd60f2 upstream. This reverts commit ad211f3e. As Jan Kara pointed out, this change was unsafe since it means we lose the call to sync_mapping_buffers() in the nojournal case. The original point of the commit was avoid taking the inode mutex (since it causes a lockdep warning in generic/113); but we need the mutex in order to call sync_mapping_buffers(). The real fix to this problem was discussed here: https://lore.kernel.org/lkml/20181025150540.259281-4-bvanassche@acm.org The proposed patch was to fix a syzbot complaint, but the problem can also demonstrated via "kvm-xfstests -c nojournal generic/113". Multiple solutions were discused in the e-mail thread, but none have landed in the kernel as of this writing. Anyway, commit ad211f3e is absolutely the wrong way to suppress the lockdep, so revert it. Fixes: ad211f3e ("ext4: use ext4_write_inode() when fsyncing w/o a journal") Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Reported: Jan Kara <jack@suse.cz> Signed-off-by:
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Vladis Dronov authored
commit 13054abb upstream. Ring buffer implementation in hid_debug_event() and hid_debug_events_read() is strange allowing lost or corrupted data. After commit 717adfda ("HID: debug: check length before copy_to_user()") it is possible to enter an infinite loop in hid_debug_events_read() by providing 0 as count, this locks up a system. Fix this by rewriting the ring buffer implementation with kfifo and simplify the code. This fixes CVE-2019-3819. v2: fix an execution logic and add a comment v3: use __set_current_state() instead of set_current_state() Backport to v4.14: 2 tree-wide patches 6396bb22 ("treewide: kzalloc() -> kcalloc()") and a9a08845 ("vfs: do bulk POLL* -> EPOLL* replacement") are missing in v4.14 so cherry-pick relevant pieces. Link: https://bugzilla.redhat.com/show_bug.cgi?id=1669187 Cc: stable@vger.kernel.org # v4.18+ Fixes: cd667ce2 ("HID: use debugfs for events/reports dumping") Fixes: 717adfda ("HID: debug: check length before copy_to_user()") Signed-off-by:
Vladis Dronov <vdronov@redhat.com> Reviewed-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
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Thomas Hellstrom authored
commit 728354c0 upstream. The function was unconditionally returning 0, and a caller would have to rely on the returned fence pointer being NULL to detect errors. However, the function vmw_execbuf_copy_fence_user() would expect a non-zero error code in that case and would BUG otherwise. So make sure we return a proper non-zero error code if the fence pointer returned is NULL. Cc: <stable@vger.kernel.org> Fixes: ae2a1040: ("vmwgfx: Implement fence objects") Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Deepak Rawat <drawat@vmware.com> Signed-off-by:
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Thomas Hellstrom authored
commit 4cbfa1e6 upstream. Previously we set only the dma mask and not the coherent mask. Fix that. Also, for clarity, make sure both are initially set to 64 bits. Cc: <stable@vger.kernel.org> Fixes: 0d00c488: ("drm/vmwgfx: Fix the driver for large dma addresses") Signed-off-by:
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Tina Zhang authored
commit a2fcd5c8 upstream. This patch prevents division by zero htotal. In a follow-up mail Tina writes: > > How did you manage to get here with htotal == 0? This needs backtraces (or if > > this is just about static checkers, a mention of that). > > -Daniel > > In GVT-g, we are trying to enable a virtual display w/o setting timings for a pipe > (a.k.a htotal=0), then we met the following kernel panic: > > [ 32.832048] divide error: 0000 [#1] SMP PTI > [ 32.833614] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.18.0-rc4-sriov+ #33 > [ 32.834438] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.10.1-0-g8891697-dirty-20180511_165818-tinazhang-linux-1 04/01/2014 > [ 32.835901] RIP: 0010:drm_mode_hsync+0x1e/0x40 > [ 32.836004] Code: 31 c0 c3 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 8b 87 d8 00 00 00 85 c0 75 22 8b 4f 68 85 c9 78 1b 69 47 58 e8 03 00 00 99 <f7> f9 b9 d3 4d 62 10 05 f4 01 00 00 f7 e1 89 d0 c1 e8 06 f3 c3 66 > [ 32.836004] RSP: 0000:ffffc900000ebb90 EFLAGS: 00010206 > [ 32.836004] RAX: 0000000000000000 RBX: ffff88001c67c8a0 RCX: 0000000000000000 > [ 32.836004] RDX: 0000000000000000 RSI: ffff88001c67c000 RDI: ffff88001c67c8a0 > [ 32.836004] RBP: ffff88001c7d03a0 R08: ffff88001c67c8a0 R09: ffff88001c7d0330 > [ 32.836004] R10: ffffffff822c3a98 R11: 0000000000000001 R12: ffff88001c67c000 > [ 32.836004] R13: ffff88001c7d0370 R14: ffffffff8207eb78 R15: ffff88001c67c800 > [ 32.836004] FS: 0000000000000000(0000) GS:ffff88001da00000(0000) knlGS:0000000000000000 > [ 32.836004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 32.836004] CR2: 0000000000000000 CR3: 000000000220a000 CR4: 00000000000006f0 > [ 32.836004] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 32.836004] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ 32.836004] Call Trace: > [ 32.836004] intel_mode_from_pipe_config+0x72/0x90 > [ 32.836004] intel_modeset_setup_hw_state+0x569/0xf90 > [ 32.836004] intel_modeset_init+0x905/0x1db0 > [ 32.836004] i915_driver_load+0xb8c/0x1120 > [ 32.836004] i915_pci_probe+0x4d/0xb0 > [ 32.836004] local_pci_probe+0x44/0xa0 > [ 32.836004] ? pci_assign_irq+0x27/0x130 > [ 32.836004] pci_device_probe+0x102/0x1c0 > [ 32.836004] driver_probe_device+0x2b8/0x480 > [ 32.836004] __driver_attach+0x109/0x110 > [ 32.836004] ? driver_probe_device+0x480/0x480 > [ 32.836004] bus_for_each_dev+0x67/0xc0 > [ 32.836004] ? klist_add_tail+0x3b/0x70 > [ 32.836004] bus_add_driver+0x1e8/0x260 > [ 32.836004] driver_register+0x5b/0xe0 > [ 32.836004] ? mipi_dsi_bus_init+0x11/0x11 > [ 32.836004] do_one_initcall+0x4d/0x1eb > [ 32.836004] kernel_init_freeable+0x197/0x237 > [ 32.836004] ? rest_init+0xd0/0xd0 > [ 32.836004] kernel_init+0xa/0x110 > [ 32.836004] ret_from_fork+0x35/0x40 > [ 32.836004] Modules linked in: > [ 32.859183] ---[ end trace 525608b0ed0e8665 ]--- > [ 32.859722] RIP: 0010:drm_mode_hsync+0x1e/0x40 > [ 32.860287] Code: 31 c0 c3 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 8b 87 d8 00 00 00 85 c0 75 22 8b 4f 68 85 c9 78 1b 69 47 58 e8 03 00 00 99 <f7> f9 b9 d3 4d 62 10 05 f4 01 00 00 f7 e1 89 d0 c1 e8 06 f3 c3 66 > [ 32.862680] RSP: 0000:ffffc900000ebb90 EFLAGS: 00010206 > [ 32.863309] RAX: 0000000000000000 RBX: ffff88001c67c8a0 RCX: 0000000000000000 > [ 32.864182] RDX: 0000000000000000 RSI: ffff88001c67c000 RDI: ffff88001c67c8a0 > [ 32.865206] RBP: ffff88001c7d03a0 R08: ffff88001c67c8a0 R09: ffff88001c7d0330 > [ 32.866359] R10: ffffffff822c3a98 R11: 0000000000000001 R12: ffff88001c67c000 > [ 32.867213] R13: ffff88001c7d0370 R14: ffffffff8207eb78 R15: ffff88001c67c800 > [ 32.868075] FS: 0000000000000000(0000) GS:ffff88001da00000(0000) knlGS:0000000000000000 > [ 32.868983] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 32.869659] CR2: 0000000000000000 CR3: 000000000220a000 CR4: 00000000000006f0 > [ 32.870599] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 32.871598] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ 32.872549] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b > > Since drm_mode_hsync() has the logic to check mode->htotal, I just extend it to cover the case htotal==0. Signed-off-by:
Tina Zhang <tina.zhang@intel.com> Cc: Adam Jackson <ajax@redhat.com> Cc: Dave Airlie <airlied@redhat.com> Cc: Daniel Vetter <daniel@ffwll.ch> [danvet: Add additional explanations + cc: stable.] Cc: stable@vger.kernel.org Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1548228539-3061-1-git-send-email-tina.zhang@intel.comSigned-off-by:
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Felix Fietkau authored
commit 9d0f50b8 upstream. Some drivers use IEEE80211_KEY_FLAG_SW_MGMT_TX to indicate that management frames need to be software encrypted. Since normal data packets are still encrypted by the hardware, crypto_tx_tailroom_needed_cnt gets decremented after key upload to hw. This can lead to passing skbs to ccmp_encrypt_skb, which don't have the necessary tailroom for software encryption. Change the code to add tailroom for encrypted management packets, even if crypto_tx_tailroom_needed_cnt is 0. Cc: stable@vger.kernel.org Signed-off-by:
Felix Fietkau <nbd@nbd.name> Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Marc Gonzalez authored
commit d0f9f167 upstream. Calling platform-specific code unconditionally blows up when running an ARCH_MULTIPLATFORM kernel on a different platform. Don't do it. Reported-by:
Paolo Pisati <p.pisati@gmail.com> Signed-off-by:
Marc Gonzalez <marc.w.gonzalez@free.fr> Acked-by:
Pavel Machek <pavel@ucw.cz> Cc: stable@vger.kernel.org # v4.8+ Fixes: a30eceb7 ("ARM: tango: add Suspend-to-RAM support") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Russell King authored
commit db409092 upstream. Booting 4.20 on a TheCUS N2100 results in a kernel oops while probing PCI, due to n2100_pci_map_irq() having been discarded during boot. Signed-off-by:
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Paul Burton authored
commit 67fc5dc8 upstream. When generating vdso-o32.lds & vdso-n32.lds for use with programs running as compat ABIs under 64b kernels, we previously haven't included the compiler flags that are supposedly common to all ABIs - ie. those in the ccflags-vdso variable. This is problematic in cases where we need to provide the -m%-float flag in order to ensure that we don't attempt to use a floating point ABI that's incompatible with the target CPU & ABI. For example a toolchain using current gcc trunk configured --with-fp-32=xx fails to build a 64r6el_defconfig kernel with the following error: cc1: error: '-march=mips1' requires '-mfp32' make[2]: *** [arch/mips/vdso/Makefile:135: arch/mips/vdso/vdso-o32.lds] Error 1 Include $(ccflags-vdso) for the compat VDSO .lds builds, just as it is included for the native VDSO .lds & when compiling objects for the compat VDSOs. This ensures we consistently provide the -msoft-float flag amongst others, avoiding the problem by ensuring we're agnostic to the toolchain defaults. Signed-off-by:
Paul Burton <paul.burton@mips.com> Fixes: ebb5e78c ("MIPS: Initial implementation of a VDSO") Cc: linux-mips@vger.kernel.org Cc: Kevin Hilman <khilman@baylibre.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Maciej W . Rozycki <macro@linux-mips.org> Cc: stable@vger.kernel.org # v4.4+ Signed-off-by:
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Aaro Koskinen authored
commit dcf300a6 upstream. Don't set octeon_dma_bar_type if PCI is disabled. This avoids creation of the MSI irqchip later on, and saves a bit of memory. Signed-off-by:
Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by:
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Vladimir Kondratiev authored
commit 05dc6001 upstream. Accordingly to the documentation ---cut--- The GCR_ERROR_CAUSE.ERR_TYPE field and the GCR_ERROR_MULT.ERR_TYPE fields can be cleared by either a reset or by writing the current value of GCR_ERROR_CAUSE.ERR_TYPE to the GCR_ERROR_CAUSE.ERR_TYPE register. ---cut--- Do exactly this. Original value of cm_error may be safely written back; it clears error cause and keeps other bits untouched. Fixes: 3885c2b4 ("MIPS: CM: Add support for reporting CM cache errors") Signed-off-by:
Vladimir Kondratiev <vladimir.kondratiev@linux.intel.com> Signed-off-by:
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Andreas Ziegler authored
commit ea6eb5e7 upstream. The subsystem-specific message prefix for uprobes was also "trace_kprobe: " instead of "trace_uprobe: " as described in the original commit message. Link: http://lkml.kernel.org/r/20190117133023.19292-1-andreas.ziegler@fau.de Cc: Ingo Molnar <mingo@redhat.com> Cc: stable@vger.kernel.org Acked-by:
Masami Hiramatsu <mhiramat@kernel.org> Fixes: 72576341 ("tracing/probe: Show subsystem name in messages") Signed-off-by:
Andreas Ziegler <andreas.ziegler@fau.de> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Greg Kroah-Hartman authored
commit d88c93f0 upstream. debugfs_rename() needs to check that the dentries passed into it really are valid, as sometimes they are not (i.e. if the return value of another debugfs call is passed into this one.) So fix this up by properly checking if the two parent directories are errors (they are allowed to be NULL), and if the dentry to rename is not NULL or an error. Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Tomas Winkler authored
commit c4a46acf upstream. The device was moved from misc device to character devices to support multiple mei devices. Cc: <stable@vger.kernel.org> #v4.9+ Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Signed-off-by:
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Dan Carpenter authored
commit f8a70d8b upstream. The > comparison should be >= to prevent reading beyond the end of the func->template[] array. (The func->template array is allocated in vexpress_syscfg_regmap_init() and it has func->num_templates elements.) Fixes: 974cc7b9 ("mfd: vexpress: Define the device as MFD cells") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
Sudeep Holla <sudeep.holla@arm.com> Signed-off-by:
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Eric W. Biederman authored
commit 7146db33 upstream. Recently syzkaller was able to create unkillablle processes by creating a timer that is delivered as a thread local signal on SIGHUP, and receiving SIGHUP SA_NODEFERER. Ultimately causing a loop failing to deliver SIGHUP but always trying. When the stack overflows delivery of SIGHUP fails and force_sigsegv is called. Unfortunately because SIGSEGV is numerically higher than SIGHUP next_signal tries again to deliver a SIGHUP. From a quality of implementation standpoint attempting to deliver the timer SIGHUP signal is wrong. We should attempt to deliver the synchronous SIGSEGV signal we just forced. We can make that happening in a fairly straight forward manner by instead of just looking at the signal number we also look at the si_code. In particular for exceptions (aka synchronous signals) the si_code is always greater than 0. That still has the potential to pick up a number of asynchronous signals as in a few cases the same si_codes that are used for synchronous signals are also used for asynchronous signals, and SI_KERNEL is also included in the list of possible si_codes. Still the heuristic is much better and timer signals are definitely excluded. Which is enough to prevent all known ways for someone sending a process signals fast enough to cause unexpected and arguably incorrect behavior. Cc: stable@vger.kernel.org Fixes: a27341cd ("Prioritize synchronous signals over 'normal' signals") Tested-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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