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| author |   Mike Snitzer <snitzer@redhat.com> | 2017-06-20 19:14:30 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-06-21 12:04:50 -0400 |
| commit | feb7695fe9fb83084aa29de0094774f4c9d4c9fc (patch) | |
| tree | dbdc175a3abd214ec6cef8531d07944407610421 /net/unix/af_unix.c | |
| parent | dm integrity: fix to not disable/enable interrupts from interrupt context (diff) | |
| download | wireguard-linux-feb7695fe9fb83084aa29de0094774f4c9d4c9fc.tar.xz wireguard-linux-feb7695fe9fb83084aa29de0094774f4c9d4c9fc.zip | |
dm io: fix duplicate bio completion due to missing ref count
If only a subset of the devices associated with multiple regions support
a given special operation (eg. DISCARD) then the dec_count() that is
used to set error for the region must increment the io->count.
Otherwise, when the dec_count() is called it can cause the dm-io
caller's bio to be completed multiple times. As was reported against
the dm-mirror target that had mirror legs with a mix of discard
capabilities.
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=196077
Reported-by: Zhang Yi <yizhan@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions