Zhang Xiaoxu 9b2f20344d btrfs: selftests: fix wrong error check in btrfs_free_dummy_root()
The btrfs_alloc_dummy_root() uses ERR_PTR as the error return value
rather than NULL, if error happened, there will be a NULL pointer
dereference:

  BUG: KASAN: null-ptr-deref in btrfs_free_dummy_root+0x21/0x50 [btrfs]
  Read of size 8 at addr 000000000000002c by task insmod/258926

  CPU: 2 PID: 258926 Comm: insmod Tainted: G        W          6.1.0-rc2+ 
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014
  Call Trace:
   <TASK>
   dump_stack_lvl+0x34/0x44
   kasan_report+0xb7/0x140
   kasan_check_range+0x145/0x1a0
   btrfs_free_dummy_root+0x21/0x50 [btrfs]
   btrfs_test_free_space_cache+0x1a8c/0x1add [btrfs]
   btrfs_run_sanity_tests+0x65/0x80 [btrfs]
   init_btrfs_fs+0xec/0x154 [btrfs]
   do_one_initcall+0x87/0x2a0
   do_init_module+0xdf/0x320
   load_module+0x3006/0x3390
   __do_sys_finit_module+0x113/0x1b0
   do_syscall_64+0x35/0x80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

Fixes: aaedb55bc08f ("Btrfs: add tests for btrfs_get_extent")
CC: stable@vger.kernel.org # 4.9+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2022-11-07 14:30:50 +01:00
..
2022-07-02 18:52:21 +09:00
2022-09-14 04:00:06 -05:00
2022-08-08 11:18:31 -07:00
2022-08-08 20:04:35 -07:00
2022-08-11 13:11:49 -07:00
2022-06-29 08:51:06 -04:00
2022-08-03 10:35:43 -07:00
2022-05-09 16:21:45 -04:00
2022-08-08 20:04:35 -07:00
2022-08-11 13:11:49 -07:00
2022-08-03 10:35:43 -07:00
2022-09-12 17:53:46 -04:00
2022-08-03 10:35:43 -07:00
2022-07-26 13:38:47 +02:00
2022-08-03 10:35:43 -07:00
2022-08-22 11:33:02 -07:00
2022-08-03 14:38:02 -07:00
2022-08-03 10:35:43 -07:00
2022-05-09 16:21:46 -04:00
2022-05-23 20:24:12 -05:00
2022-08-03 10:35:43 -07:00
2022-08-13 13:50:11 -07:00
2022-08-11 13:11:49 -07:00
2022-08-03 10:35:43 -07:00
2022-07-16 09:19:15 -04:00
2022-04-01 19:35:56 -07:00
2022-07-24 18:39:10 -06:00
2022-08-03 10:35:43 -07:00
2022-08-09 09:52:28 -07:00
2022-06-28 13:58:05 -04:00
2022-05-22 21:03:01 +01:00
2022-08-08 11:10:02 -07:00