xfs: ensure logflagsp is initialized in xfs_bmap_del_extent_real

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In the case of returning -ENOSPC, ensure logflagsp is initialized by 0.
Otherwise the caller __xfs_bunmapi will set uninitialized illegal
tmp_logflags value into xfs log, which might cause unpredictable error
in the log recovery procedure.

Also, remove the flags variable and set the *logflagsp directly, so that
the code should be more robust in the long run.

Fixes: 1b24b633aa ("xfs: move some more code into xfs_bmap_del_extent_real")
Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

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Jiachen Zhang 2023-12-05 13:58:58 +08:00 • committed by Chandan Babu R

parent 08e54ca42d

commit e6af9c98cb

1 changed files with 31 additions and 42 deletions

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fs/xfs/libxfs/xfs_bmap.c

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