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fanotify: Support null inode event in fanotify_dfid_inode

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[ Upstream commit 12f47bf0f0 ]

FAN_FS_ERROR doesn't support DFID, but this function is still called for
every event.  The problem is that it is not capable of handling null
inodes, which now can happen in case of superblock error events.  For
this case, just returning dir will be enough.

Link: https://lore.kernel.org/r/20211025192746.66445-14-krisman@collabora.com
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Gabriel Krisman Bertazi
2021-10-25 16:27:28 -03:00
committed by Greg Kroah-Hartman
parent 20bb62edd6
commit 900fe4d704
1 changed files with 1 additions and 1 deletions
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fs/notify/fanotify/fanotify.c
+1 -1
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@@ -452,7 +452,7 @@ static struct inode *fanotify_dfid_inode(u32 event_mask, const void *data,
if (event_mask & ALL_FSNOTIFY_DIRENT_EVENTS)
return dir;
if (S_ISDIR(inode->i_mode))
if (inode && S_ISDIR(inode->i_mode))
return inode;
return dir;