- 16 Aug, 2011 3 commits
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WANG Cong authored
commit b4bc2812 upstream. Fix: arch/cris/arch-v10/drivers/sync_serial.c:961: error: conflicting types for 'sync_serial_ioctl' Reported-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
WANG Cong <xiyou.wangcong@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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WANG Cong authored
commit 4b851d88 upstream. Fix: arch/cris/arch-v10/drivers/sync_serial.c:628: error: 'ret' undeclared (first use in this function) 'ret' should be 'err'. Reported-by:
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WANG Cong authored
commit d4969213 upstream. Fix this error: kernel/fork.c:267: error: implicit declaration of function 'alloc_thread_info_node' This is due to renaming alloc_thread_info() to alloc_thread_info_node(). [akpm@linux-foundation.org: coding-style fixes] Reported-by:
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- 05 Aug, 2011 37 commits
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Greg Kroah-Hartman authored
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Alasdair G Kergon authored
commit d15b774c upstream. Destroy _minor_idr when unloading the core dm module. (Found by kmemleak.) Signed-off-by:
Alasdair G Kergon <agk@redhat.com> Signed-off-by:
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Mike Snitzer authored
commit 286f367d upstream. Avoid dereferencing a NULL pointer if the number of feature arguments supplied is fewer than indicated. Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
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Mikulas Patocka authored
commit 762a80d9 upstream. This patch makes dm-snapshot flush disk cache when writing metadata for merging snapshot. Without cache flushing the disk may reorder metadata write and other data writes and there is a possibility of data corruption in case of power fault. Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
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Mikulas Patocka authored
commit bb91bc7b upstream. For normal kernel pages, CPU cache is synchronized by the dma layer. However, this is not done for pages allocated with vmalloc. If we do I/O to/from vmallocated pages, we must synchronize CPU cache explicitly. Prior to doing I/O on vmallocated page we must call flush_kernel_vmap_range to flush dirty cache on the virtual address. After finished read we must call invalidate_kernel_vmap_range to invalidate cache on the virtual address, so that accesses to the virtual address return newly read data and not stale data from CPU cache. This patch fixes metadata corruption on dm-snapshots on PA-RISC and possibly other architectures with caches indexed by virtual address. Signed-off-by:
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Julia Lawall authored
commit ca9380fd upstream. Convert array index from the loop bound to the loop index. A simplified version of the semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e1,e2,ar; @@ for(e1 = 0; e1 < e2; e1++) { <... ar[ - e2 + e1 ] ...> } // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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David Engraf authored
commit bea19066 upstream. Fix the usage of mod_timer() and make the driver usable. mod_timer() must be called with an absolute timeout in jiffies. The old implementation used a relative timeout thus the hardware watchdog was never triggered. Signed-off-by:
David Engraf <david.engraf@sysgo.com> Signed-off-by:
Paul Mundt <lethal@linux-sh.org> Signed-off-by:
Wim Van sebroeck <wim@iguana.be> Signed-off-by:
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Steven Whitehouse authored
commit 19237039 upstream. Depending upon the order of userspace/kernel during the mount process, this can result in a hang without the _all version of the completion. Signed-off-by:
Steven Whitehouse <swhiteho@redhat.com> Signed-off-by:
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Gertjan van Wingerde authored
commit 71e0b38c upstream. Reported-by:
Wim Vander Schelden <wim@fixnum.org> Signed-off-by:
Gertjan van Wingerde <gwingerde@gmail.com> Signed-off-by:
Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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Oleg Nesterov authored
commit c027a474 upstream. exit_mm() sets ->mm == NULL then it does mmput()->exit_mmap() which frees the memory. However select_bad_process() checks ->mm != NULL before TIF_MEMDIE, so it continues to kill other tasks even if we have the oom-killed task freeing its memory. Change select_bad_process() to check ->mm after TIF_MEMDIE, but skip the tasks which have already passed exit_notify() to ensure a zombie with TIF_MEMDIE set can't block oom-killer. Alternatively we could probably clear TIF_MEMDIE after exit_mmap(). Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Reviewed-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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John Johansen authored
commit 25e75dff upstream. AppArmor is masking the capabilities returned by capget against the capabilities mask in the profile. This is wrong, in complain mode the profile has effectively all capabilities, as the profile restrictions are not being enforced, merely tested against to determine if an access is known by the profile. This can result in the wrong behavior of security conscience applications like sshd which examine their capability set, and change their behavior accordingly. In this case because of the masked capability set being returned sshd fails due to DAC checks, even when the profile is in complain mode. Kernels affected: 2.6.36 - 3.0. Signed-off-by:
John Johansen <john.johansen@canonical.com> Signed-off-by:
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John Johansen authored
commit 04fdc099 upstream. The pointer returned from tracehook_tracer_task() is only valid inside the rcu_read_lock. However the tracer pointer obtained is being passed to aa_may_ptrace outside of the rcu_read_lock critical section. Mover the aa_may_ptrace test into the rcu_read_lock critical section, to fix this. Kernels affected: 2.6.36 - 3.0 Reported-by:
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Manfred Spraul authored
commit d694ad62 upstream. If a semaphore array is removed and in parallel a sleeping task is woken up (signal or timeout, does not matter), then the woken up task does not wait until wake_up_sem_queue_do() is completed. This will cause crashes, because wake_up_sem_queue_do() will read from a stale pointer. The fix is simple: Regardless of anything, always call get_queue_result(). This function waits until wake_up_sem_queue_do() has finished it's task. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=27142Reported-by:
Yuriy Yevtukhov <yuriy@ucoz.com> Reported-by:
Harald Laabs <kernel@dasr.de> Signed-off-by:
Manfred Spraul <manfred@colorfullife.com> Acked-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
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Hendrik Brueckner authored
commit 8c2381af upstream. Currently, the hvc_console_print() function drops console output if the hvc backend's put_chars() returns 0. This patch changes this behavior to allow a retry through returning -EAGAIN. This change also affects the hvc_push() function. Both functions are changed to handle -EAGAIN and to retry the put_chars() operation. If a hvc backend returns -EAGAIN, the retry handling differs: - hvc_console_print() spins to write the complete console output. - hvc_push() behaves the same way as for returning 0. Now hvc backends can indirectly control the way how console output is handled through the hvc console layer. Signed-off-by:
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Acked-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Anton Blanchard authored
commit 51d33021 upstream. Return -EAGAIN when we get H_BUSY back from the hypervisor. This makes the hvc console driver retry, avoiding dropped printks. Signed-off-by:
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Ralf Baechle authored
commit f2eb3cdf upstream. Kconfig allows enabling console support for the SC26xx driver even when it's configured as a module resulting in a: ERROR: "uart_console_device" [drivers/tty/serial/sc26xx.ko] undefined! modpost error since the driver was merged in eea63e0e [SC26XX: New serial driver for SC2681 uarts] in 2.6.25. Fixed by only allowing console support to be enabled if the driver is builtin. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Acked-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
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Stephen Warren authored
commit 5568181f upstream. Commit 4539c24f "tty/serial: Add explicit PORT_TEGRA type" introduced separate flags describing the need for IER bits UUE and RTOIE. Both bits are required for the XSCALE port type. While that patch updated uart_config[] as required, the auto-probing code wasn't updated to set the RTOIE flag when an XSCALE port type was detected. This caused such ports to stop working. This patch rectifies that. Reported-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by:
Stephen Warren <swarren@nvidia.com> Signed-off-by:
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Daisuke Nishimura authored
commit 108b6a78 upstream. Commit 22a668d7 ("memcg: fix behavior under memory.limit equals to memsw.limit") introduced "memsw_is_minimum" flag, which becomes true when mem_limit == memsw_limit. The flag is checked at the beginning of reclaim, and "noswap" is set if the flag is true, because using swap is meaningless in this case. This works well in most cases, but when we try to shrink mem_limit, which is the same as memsw_limit now, we might fail to shrink mem_limit because swap doesn't used. This patch fixes this behavior by: - check MEM_CGROUP_RECLAIM_SHRINK at the begining of reclaim - If it is set, don't set "noswap" flag even if memsw_is_minimum is true. Signed-off-by:
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <bsingharora@gmail.com> Acked-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Ying Han <yinghan@google.com> Signed-off-by:
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Sven Neumann authored
commit a203c2aa upstream. At the beginning of wiphy_update_regulatory() a check is performed whether the request is to be ignored. Then the request is sent to the driver nevertheless. This happens even if last_request points to NULL, leading to a crash in the driver: [<bf01d864>] (lbs_set_11d_domain_info+0x28/0x1e4 [libertas]) from [<c03b714c>] (wiphy_update_regulatory+0x4d0/0x4f4) [<c03b714c>] (wiphy_update_regulatory+0x4d0/0x4f4) from [<c03b4008>] (wiphy_register+0x354/0x420) [<c03b4008>] (wiphy_register+0x354/0x420) from [<bf01b17c>] (lbs_cfg_register+0x80/0x164 [libertas]) [<bf01b17c>] (lbs_cfg_register+0x80/0x164 [libertas]) from [<bf020e64>] (lbs_start_card+0x20/0x88 [libertas]) [<bf020e64>] (lbs_start_card+0x20/0x88 [libertas]) from [<bf02cbd8>] (if_sdio_probe+0x898/0x9c0 [libertas_sdio]) Fix this by returning early. Also remove the out: label as it is not any longer needed. Signed-off-by:
Sven Neumann <s.neumann@raumfeld.com> Cc: linux-wireless@vger.kernel.org Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Daniel Mack <daniel@zonque.org> Signed-off-by:
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Alan Stern authored
commit e04f5f7e upstream. This patch (as1480) fixes a rather obscure bug in ehci-hcd. The qh_update() routine needs to know the number and direction of the endpoint corresponding to its QH argument. The number can be taken directly from the QH data structure, but the direction isn't stored there. The direction is taken instead from the first qTD linked to the QH. However, it turns out that for interrupt transfers, qh_update() gets called before the qTDs are linked to the QH. As a result, qh_update() computes a bogus direction value, which messes up the endpoint toggle handling. Under the right combination of circumstances this causes usb_reset_endpoint() not to work correctly, which causes packets to be dropped and communications to fail. Now, it's silly for the QH structure not to have direct access to all the descriptor information for the corresponding endpoint. Ultimately it may get a pointer to the usb_host_endpoint structure; for now, adding a copy of the direction flag solves the immediate problem. This allows the Spyder2 color-calibration system (a low-speed USB device that sends all its interrupt data packets with the toggle set to 0 and hance requires constant use of usb_reset_endpoint) to work when connected through a high-speed hub. Thanks to Graeme Gill for supplying the hardware that allowed me to track down this bug. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Reported-by:
Graeme Gill <graeme@argyllcms.com> Signed-off-by:
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Sergei Shtylyov authored
commit 81463c1d upstream. MAX4967 USB power supply chip we use on our boards signals over-current when power is not enabled; once it's enabled, over-current signal returns to normal. That unfortunately caused the endless stream of "over-current change on port" messages. The EHCI root hub code reacts on every over-current signal change with powering off the port -- such change event is generated the moment the port power is enabled, so once enabled the power is immediately cut off. I think we should only cut off power when we're seeing the active over-current signal, so I'm adding such check to that code. I also think that the fact that we've cut off the port power should be reflected in the result of GetPortStatus request immediately, hence I'm adding a PORTSCn register readback after write... Signed-off-by:
Sergei Shtylyov <sshtylyov@ru.mvista.com> Acked-by:
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Du, Alek authored
commit f086ced1 upstream. FCS could be GSM0_SOF, so will break state machine... [This byte isn't quoted in any way so a SOF here doesn't imply an error occurred.] Signed-off-by:
Alek Du <alek.du@intel.com> Signed-off-by:
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Vasiliy Kulikov authored
commit 293eb1e7 upstream. If an inode's mode permits opening /proc/PID/io and the resulting file descriptor is kept across execve() of a setuid or similar binary, the ptrace_may_access() check tries to prevent using this fd against the task with escalated privileges. Unfortunately, there is a race in the check against execve(). If execve() is processed after the ptrace check, but before the actual io information gathering, io statistics will be gathered from the privileged process. At least in theory this might lead to gathering sensible information (like ssh/ftp password length) that wouldn't be available otherwise. Holding task->signal->cred_guard_mutex while gathering the io information should protect against the race. The order of locking is similar to the one inside of ptrace_attach(): first goes cred_guard_mutex, then lock_task_sighand(). Signed-off-by:
Vasiliy Kulikov <segoon@openwall.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Trond Myklebust authored
commit 0c030806 upstream. If the directory contents change, then we have to accept that the file->f_pos value may shrink if we do a 'search-by-cookie'. In that case, we should turn off the loop detection and let the NFS client try to recover. The patch also fixes a second loop detection bug by ensuring that after turning on the ctx->duped flag, we read at least one new cookie into ctx->dir_cookie before attempting to match with ctx->dup_cookie. Reported-by:
Petr Vandrovec <petr@vandrovec.name> Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
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Trond Myklebust authored
commit ed1e6211 upstream. nfs_mark_return_delegation() is usually called without any locking, and so it is not safe to dereference delegation->inode. Since the inode is only used to discover the nfs_client anyway, it makes more sense to have the callers pass a valid pointer to the nfs_server as a parameter. Reported-by:
Ian Kent <raven@themaw.net> Signed-off-by:
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J. Bruce Fields authored
commit ebc63e53 upstream. After commit 3262c816 "[PATCH] knfsd: split svc_serv into pools", svc_delete_xprt (then svc_delete_socket) no longer removed its xpt_ready (then sk_ready) field from whatever list it was on, noting that there was no point since the whole list was about to be destroyed anyway. That was mostly true, but forgot that a few svc_xprt_enqueue()'s might still be hanging around playing with the about-to-be-destroyed list, and could get themselves into trouble writing to freed memory if we left this xprt on the list after freeing it. (This is actually functionally identical to a patch made first by Ben Greear, but with more comments.) Cc: gnb@fmeh.org Reported-by:
Ben Greear <greearb@candelatech.com> Tested-by:
J. Bruce Fields <bfields@redhat.com> Signed-off-by:
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J. Bruce Fields authored
commit f197c271 upstream. Stateid's hold a read reference for a read open, a write reference for a write open, and an additional one of each for each read+write open. The latter wasn't getting put on a downgrade, so something like: open RW open R downgrade to R was resulting in a file leak. Also fix an imbalance in an error path. Regression from 7d947842 "nfsd4: fix downgrade/lock logic". Signed-off-by:
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J. Bruce Fields authored
commit 499f3edc upstream. Without this, for example, open read open read+write close will result in a struct file leak. Regression from 7d947842 "nfsd4: fix downgrade/lock logic". Signed-off-by:
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Casey Bodley authored
commit 0c12eaff upstream. CLAIM_DELEGATE_CUR is used in response to a broken lease; allowing it to break the lease and return EAGAIN leaves the client unable to make progress in returning the delegation nfs4_get_vfs_file() now takes struct nfsd4_open for access to the claim type, and calls nfsd_open() with NFSD_MAY_NOT_BREAK_LEASE when claim type is CLAIM_DELEGATE_CUR Signed-off-by:
Casey Bodley <cbodley@citi.umich.edu> Signed-off-by:
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Tyler Hicks authored
commit b2987a5e upstream. Fixes a regression caused by b5695d04 Kernel keyring keys containing eCryptfs authentication tokens should not be write locked when calling out to ecryptfsd to wrap and unwrap file encryption keys. The eCryptfs kernel code can not hold the key's write lock because ecryptfsd needs to request the key after receiving such a request from the kernel. Without this fix, all file opens and creates will timeout and fail when using the eCryptfs PKI infrastructure. This is not an issue when using passphrase-based mount keys, which is the most widely deployed eCryptfs configuration. Signed-off-by:
Tyler Hicks <tyhicks@linux.vnet.ibm.com> Acked-by:
Roberto Sassu <roberto.sassu@polito.it> Tested-by:
Alexis Hafner1 <haf@zurich.ibm.com> Signed-off-by:
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Thieu Le authored
commit 985ca0e6 upstream. Make the inode mapping bdi consistent with the superblock bdi so that dirty pages are flushed properly. Signed-off-by:
Thieu Le <thieule@chromium.org> Signed-off-by:
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Jan Kara authored
commit ad95c5e9 upstream. Block allocation is called from two places: ext3_get_blocks_handle() and ext3_xattr_block_set(). These two callers are not necessarily synchronized because xattr code holds only xattr_sem and i_mutex, and ext3_get_blocks_handle() may hold only truncate_mutex when called from writepage() path. Block reservation code does not expect two concurrent allocations to happen to the same inode and thus assertions can be triggered or reservation structure corruption can occur. Fix the problem by taking truncate_mutex in xattr code to serialize allocations. CC: Sage Weil <sage@newdream.net> Reported-by:
Fyodor Ustinov <ufm@ufm.su> Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Jiaying Zhang authored
commit 575a1d4b upstream. Upon corrupted inode or disk failures, we may fail after we already allocate some blocks from the inode or take some blocks from the inode's preallocation list, but before we successfully insert the corresponding extent to the extent tree. In this case, we should free any allocated blocks and discard the inode's preallocated blocks because the entries in the inode's preallocation list may be in an inconsistent state. Signed-off-by:
Jiaying Zhang <jiayingz@google.com> Signed-off-by:
"Theodore Ts'o" <tytso@mit.edu> Signed-off-by:
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Maxim Patlasov authored
commit 7132de74 upstream. The current implementation of ext4_free_blocks() always calls dquot_free_block This looks quite sensible in the most cases: blocks to be freed are associated with inode and were accounted in quota and i_blocks some time ago. However, there is a case when blocks to free were not accounted by the time calling ext4_free_blocks() yet: 1. delalloc is on, write_begin pre-allocated some space in quota 2. write-back happens, ext4 allocates some blocks in ext4_ext_map_blocks() 3. then ext4_ext_map_blocks() gets an error (e.g. ENOSPC) from ext4_ext_insert_extent() and calls ext4_free_blocks(). In this scenario, ext4_free_blocks() calls dquot_free_block() who, in turn, decrements i_blocks for blocks which were not accounted yet (due to delalloc) After clean umount, e2fsck reports something like: > Inode 21, i_blocks is 5080, should be 5128. Fix<y>? because i_blocks was erroneously decremented as explained above. The patch fixes the problem by passing the new flag EXT4_FREE_BLOCKS_NO_QUOT_UPDATE to ext4_free_blocks(), to request that the dquot_free_block() call be skipped. Signed-off-by:
Maxim Patlasov <maxim.patlasov@gmail.com> Signed-off-by:
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Dan Rosenberg authored
commit 0d0138eb upstream. Prevent an arbitrary kernel read. Check the user pointer with access_ok() before copying data in. [akpm@linux-foundation.org: s/EIO/EFAULT/] Signed-off-by:
Dan Rosenberg <drosenberg@vsecurity.com> Cc: Christian Zankel <chris@zankel.net> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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Peter Zijlstra authored
commit ccb6108f upstream. Vito said: : The system has many usb disks coming and going day to day, with their : respective bdi's having min_ratio set to 1 when inserted. It works for : some time until eventually min_ratio can no longer be set, even when the : active set of bdi's seen in /sys/class/bdi/*/min_ratio doesn't add up to : anywhere near 100. : : This then leads to an unrelated starvation problem caused by write-heavy : fuse mounts being used atop the usb disks, a problem the min_ratio setting : at the underlying devices bdi effectively prevents. Fix this leakage by resetting the bdi min_ratio when unregistering the BDI. Signed-off-by:
Peter Zijlstra <peterz@infradead.org> Reported-by:
Vito Caputo <lkml@pengaru.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by:
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Benjamin Herrenschmidt authored
commit 2efaca92 upstream. I haven't reproduced it myself but the fail scenario is that on such machines (notably ARM and some embedded powerpc), if you manage to hit that futex path on a writable page whose dirty bit has gone from the PTE, you'll livelock inside the kernel from what I can tell. It will go in a loop of trying the atomic access, failing, trying gup to "fix it up", getting succcess from gup, go back to the atomic access, failing again because dirty wasn't fixed etc... So I think you essentially hang in the kernel. The scenario is probably rare'ish because affected architecture are embedded and tend to not swap much (if at all) so we probably rarely hit the case where dirty is missing or young is missing, but I think Shan has a piece of SW that can reliably reproduce it using a shared writable mapping & fork or something like that. On archs who use SW tracking of dirty & young, a page without dirty is effectively mapped read-only and a page without young unaccessible in the PTE. Additionally, some architectures might lazily flush the TLB when relaxing write protection (by doing only a local flush), and expect a fault to invalidate the stale entry if it's still present on another processor. The futex code assumes that if the "in_atomic()" access -EFAULT's, it can "fix it up" by causing get_user_pages() which would then be equivalent to taking the fault. However that isn't the case. get_user_pages() will not call handle_mm_fault() in the case where the PTE seems to have the right permissions, regardless of the dirty and young state. It will eventually update those bits ... in the struct page, but not in the PTE. Additionally, it will not handle the lazy TLB flushing that can be required by some architectures in the fault case. Basically, gup is the wrong interface for the job. The patch provides a more appropriate one which boils down to just calling handle_mm_fault() since what we are trying to do is simulate a real page fault. The futex code currently attempts to write to user memory within a pagefault disabled section, and if that fails, tries to fix it up using get_user_pages(). This doesn't work on archs where the dirty and young bits are maintained by software, since they will gate access permission in the TLB, and will not be updated by gup(). In addition, there's an expectation on some archs that a spurious write fault triggers a local TLB flush, and that is missing from the picture as well. I decided that adding those "features" to gup() would be too much for this already too complex function, and instead added a new simpler fixup_user_fault() which is essentially a wrapper around handle_mm_fault() which the futex code can call. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix some nits Darren saw, fiddle comment layout] Signed-off-by:
Shan Hai <haishan.bai@gmail.com> Tested-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Darren Hart <darren.hart@intel.com> Signed-off-by:
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