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fix oops in fs/9p late mount failure
author
Al Viro
<viro@zeniv.linux.org.uk>
Mon, 25 Jan 2010 11:16:19 +0000
(06:16 -0500)
committer
Al Viro
<viro@zeniv.linux.org.uk>
Wed, 27 Jan 2010 03:22:27 +0000
(22:22 -0500)
if 9P ->get_sb() fails late (at root inode or root dentry
allocation), we'll hit its ->kill_sb() with NULL ->s_root
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/9p/vfs_super.c
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diff --git
a/fs/9p/vfs_super.c
b/fs/9p/vfs_super.c
index
14a8644
..
69357c0
100644
(file)
--- a/
fs/9p/vfs_super.c
+++ b/
fs/9p/vfs_super.c
@@
-188,7
+188,8
@@
static void v9fs_kill_super(struct super_block *s)
P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
- v9fs_dentry_release(s->s_root); /* clunk root */
+ if (s->s_root)
+ v9fs_dentry_release(s->s_root); /* clunk root */
kill_anon_super(s);