Pavel Skripkin a21e5cb1a6 jfs: fix GPF in diFree
commit 9d574f985fe33efd6911f4d752de6f485a1ea732 upstream.

Avoid passing inode with
JFS_SBI(inode->i_sb)->ipimap == NULL to
diFree()[1]. GFP will appear:

	struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap;
	struct inomap *imap = JFS_IP(ipimap)->i_imap;

JFS_IP() will return invalid pointer when ipimap == NULL

Call Trace:
 diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1]
 jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154
 evict+0x2ed/0x750 fs/inode.c:578
 iput_final fs/inode.c:1654 [inline]
 iput.part.0+0x3fe/0x820 fs/inode.c:1680
 iput+0x58/0x70 fs/inode.c:1670

Reported-and-tested-by: syzbot+0a89a7b56db04c21a656@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-19 08:53:18 +02:00
..
2020-11-05 11:43:34 +01:00
2021-06-23 14:41:23 +02:00
2021-05-22 11:38:29 +02:00
2019-09-19 09:42:37 -07:00
2021-07-14 16:53:17 +02:00
2021-07-14 16:53:09 +02:00
2021-07-19 08:53:18 +02:00
2021-07-14 16:53:25 +02:00
2020-06-17 16:40:24 +02:00
2020-10-01 13:17:19 +02:00
2019-08-07 21:51:47 -04:00
2020-03-25 08:25:58 +01:00
2019-12-17 19:55:30 +01:00
2019-09-18 16:59:14 -07:00
2019-09-18 16:59:14 -07:00
2019-08-01 20:51:23 +02:00