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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 <dchinner@redhat.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eryu Guan 2016-08-02 19:58:28 +08:00 committed by Linus Torvalds
parent fe64f3283f
commit 337684a174
4 changed files with 5 additions and 4 deletions
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2
fs/gfs2/inode.c
View File

@ -1800,7 +1800,7 @@ int gfs2_permission(struct inode *inode, int mask)
} }
if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
error = -EACCES; error = -EPERM;
else else
error = generic_permission(inode, mask); error = generic_permission(inode, mask);
if (gfs2_holder_initialized(&i_gh)) if (gfs2_holder_initialized(&i_gh))

2
fs/namei.c
View File

@ -410,7 +410,7 @@ int __inode_permission(struct inode *inode, int mask)
* Nobody gets write access to an immutable file. * Nobody gets write access to an immutable file.
*/ */
if (IS_IMMUTABLE(inode)) if (IS_IMMUTABLE(inode))
return -EACCES; return -EPERM;
/* /*
* Updating mtime will likely cause i_uid and i_gid to be * Updating mtime will likely cause i_uid and i_gid to be

3
fs/utimes.c
View File

@ -92,10 +92,11 @@ static int utimes_common(struct path *path, struct timespec *times)
* then we need to check permissions, because * then we need to check permissions, because
* inode_change_ok() won't do it. * inode_change_ok() won't do it.
*/ */
error = -EACCES; error = -EPERM;
if (IS_IMMUTABLE(inode)) if (IS_IMMUTABLE(inode))
goto mnt_drop_write_and_out; goto mnt_drop_write_and_out;
error = -EACCES;
if (!inode_owner_or_capable(inode)) { if (!inode_owner_or_capable(inode)) {
error = inode_permission(inode, MAY_WRITE); error = inode_permission(inode, MAY_WRITE);
if (error) if (error)

2
fs/xfs/xfs_ioctl.c
View File

@ -232,7 +232,7 @@ xfs_open_by_handle(
} }
if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
error = -EACCES; error = -EPERM;
goto out_dput; goto out_dput;
} }