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GFS2: check NULL return value in gfs2_ok_to_move

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gfs2_lookupi() can return NULL if the path to the root is broken by
another rename/rmdir. In this case gfs2_ok_to_move() must check for
this NULL pointer and return error.

Resolves: rhbz#1060246
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Abhi Das 2014-03-12 03:41:44 -05:00 committed by Steven Whitehouse
parent cb94eb066e
commit 48f8f711ed
1 changed files with 4 additions and 0 deletions
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4
fs/gfs2/inode.c
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@ -1299,6 +1299,10 @@ static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
} }
tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
if (!tmp) {
error = -ENOENT;
break;
}
if (IS_ERR(tmp)) { if (IS_ERR(tmp)) {
error = PTR_ERR(tmp); error = PTR_ERR(tmp);
break; break;