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b64b6bf4fd
kernel-ark/drivers/md
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Mikulas Patocka b64b6bf4fd dm io: make sync_io uninterruptible 
If someone sends signal to a process performing synchronous dm-io call,
the kernel may crash.

The function sync_io attempts to exit with -EINTR if it has pending signal,
however the structure "io" is allocated on stack, so already submitted io
requests end up touching unallocated stack space and corrupting kernel memory.

sync_io sets its state to TASK_UNINTERRUPTIBLE, so the signal can't break out
of io_schedule() --- however, if the signal was pending before sync_io entered
while (1) loop, the corruption of kernel memory will happen.

There is no way to cancel in-progress IOs, so the best solution is to ignore
signals at this point.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-04-02 19:55:24 +01:00
..
raid6test md: raid6: clean up the style of raid6test/test.c 2008-02-06 10:41:18 -08:00
.gitignore
bitmap.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
dm-bio-list.h dm: bio_list macro renaming 2007-10-20 02:01:11 +01:00
dm-bio-record.h dm: preserve bi_io_vec when resubmitting bios 2009-04-02 19:55:23 +01:00
dm-crypt.c dm crypt: wait for endio to complete before destruction 2009-03-16 17:44:36 +00:00
dm-delay.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-exception-store.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-exception-store.h dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-io.c dm io: make sync_io uninterruptible 2009-04-02 19:55:24 +01:00
dm-ioctl.c dm table: rework reference counting fix 2009-03-16 17:44:26 +00:00
dm-kcopyd.c block: fix bad definition of BIO_RW_SYNC 2009-02-18 10:32:00 +01:00
dm-linear.c dm: support barriers on simple devices 2009-01-06 03:05:09 +00:00
dm-log.c dm log: ensure log bitmap fits on log device 2009-01-06 03:05:02 +00:00
dm-mpath.c dm mpath: move trigger_event to system workqueue 2009-01-06 03:05:13 +00:00
dm-mpath.h dm mpath: remove is_active from struct dm_path 2008-10-10 13:36:58 +01:00
dm-path-selector.c dm: remove dm header from targets 2008-10-21 17:44:59 +01:00
dm-path-selector.h [PATCH] struct path: rename DM's struct path 2006-12-08 08:28:40 -08:00
dm-raid1.c dm raid1: switch read_record from kmalloc to slab to save memory 2009-04-02 19:55:24 +01:00
dm-region-hash.c dm raid1: separate region_hash interface part1 2008-10-21 17:45:06 +01:00
dm-round-robin.c dm: remove dm header from targets 2008-10-21 17:44:59 +01:00
dm-snap-persistent.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap-transient.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap.c dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-snap.h dm snapshot: extend exception store functions 2009-01-06 03:05:19 +00:00
dm-stripe.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-sysfs.c dm: add name and uuid to sysfs 2009-01-06 03:05:12 +00:00
dm-table.c dm table: rework reference counting 2009-01-06 03:05:10 +00:00
dm-target.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm-uevent.c md: replace remaining __FUNCTION__ occurrences 2008-04-28 08:58:42 -07:00
dm-uevent.h dm: uevent generate events 2007-10-20 02:01:26 +01:00
dm-zero.c dm: consolidate target deregistration error handling 2009-01-06 03:04:58 +00:00
dm.c dm crypt: wait for endio to complete before destruction 2009-03-16 17:44:36 +00:00
dm.h dm: add name and uuid to sysfs 2009-01-06 03:05:12 +00:00
faulty.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
Kconfig raid, fastboot: hide RAID autodetect option if MD is compiled as a module 2008-10-12 08:25:14 -07:00
linear.c md: Fix a bug in linear.c causing which_dev() to return the wrong device. 2009-02-06 15:10:52 +11:00
Makefile dm snapshot: split out exception store implementations 2009-01-06 03:05:17 +00:00
md.c md: fix deadlock when stopping arrays 2009-03-04 00:57:25 -07:00
mktables.c md: raid6: Fix mktable.c 2008-02-06 10:41:18 -08:00
multipath.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid0.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid1.c md: avoid races when stopping resync. 2009-02-25 13:18:47 +11:00
raid5.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid6.h md: Remove unnecessary #includes, #defines, and function declarations. 2008-10-13 11:55:12 +11:00
raid6algos.c drivers/md: use time_before, time_before_eq, etc 2008-04-28 08:58:42 -07:00
raid6altivec.uc
raid6int.uc
raid6mmx.c x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
raid6recov.c
raid6sse1.c x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
raid6sse2.c x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
raid6x86.h x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
raid10.c md: avoid races when stopping resync. 2009-02-25 13:18:47 +11:00
unroll.pl