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fs: return EPERM on immutable inode

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In most cases, EPERM is returned on immutable inode, and there're only a
few places returning EACCES. I noticed this when running LTP on
overlayfs, setxattr03 failed due to unexpected EACCES on immutable
inode.

So converting all EACCES to EPERM on immutable inode.

Acked-by: Dave Chinner <[email protected]>
Signed-off-by: Eryu Guan <[email protected]>
Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Eryu Guan 2016-08-02 19:58:28 +08:00 • committed by Linus Torvalds
commit 337684a174
4 changed files with 5 additions and 4 deletions
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3
fs/utimes.c
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@ -92,10 +92,11 @@ static int utimes_common(struct path *path, struct timespec *times)
* then we need to check permissions, because
* inode_change_ok() won't do it.
*/
error = -EACCES;
error = -EPERM;
if (IS_IMMUTABLE(inode))
goto mnt_drop_write_and_out;
error = -EACCES;
if (!inode_owner_or_capable(inode)) {
error = inode_permission(inode, MAY_WRITE);
if (error)