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mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-01-12 09:32:12 +00:00
Jan Kara a5789b07b3 audit: Fix possible spurious -ENOSPC error
When an inode is tagged with a tree, tag_chunk() checks whether there is
audit_tree_group mark attached to the inode and adds one if not. However
nothing protects another tag_chunk() to add the mark between we've
checked and try to add the fsnotify mark thus resulting in an error from
fsnotify_add_mark() and consequently an ENOSPC error from tag_chunk().

Fix the problem by holding mark_mutex over the whole check-insert code
sequence.

Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paul Moore <paul@paul-moore.com>
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