https://github.com/torvalds/linux
Revision 3bd9a5d734c7cc7533b27abf451416c7f50095a7 authored by Nick Piggin on 25 February 2011, 22:44:26 UTC, committed by Linus Torvalds on 25 February 2011, 23:07:37 UTC
aio-dio-invalidate-failure GPFs in aio_put_req from io_submit. lookup_ioctx doesn't implement the rcu lookup pattern properly. rcu_read_lock does not prevent refcount going to zero, so we might take a refcount on a zero count ioctx. Fix the bug by atomically testing for zero refcount before incrementing. [jack@suse.cz: added comment into the code] Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Tip revision: 3bd9a5d734c7cc7533b27abf451416c7f50095a7 authored by Nick Piggin on 25 February 2011, 22:44:26 UTC
aio: fix rcu ioctx lookup
aio: fix rcu ioctx lookup
Tip revision: 3bd9a5d
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .gitignore | -rw-r--r-- | 941 bytes |
| .mailmap | -rw-r--r-- | 4.0 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 91.7 KB |
| Kbuild | -rw-r--r-- | 2.4 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 187.0 KB |
| Makefile | -rw-r--r-- | 50.9 KB |
| README | -rw-r--r-- | 17.1 KB |
| REPORTING-BUGS | -rw-r--r-- | 3.3 KB |
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