diff mbox series

[-next,5/6] ext4: avoid to double free s_mmp_bh

Message ID 20210906144754.2601607-6-yebin10@huawei.com
State Superseded
Headers show
Series Fix some issues about mmp | expand

Commit Message

yebin (H) Sept. 6, 2021, 2:47 p.m. UTC 
If call read_mmp_block failed then s_mmp_bh will be freed in read_mmp_block.
Kmmpd wait to be killed, ext4_stop_mmpd stop kmmpd and also release s_mmp_bh.
To avoid double free, just set EXT4_SB(sb)->s_mmp_bh with NULL.

Signed-off-by: Ye Bin <yebin10@huawei.com>
---
 fs/ext4/mmp.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
index 2a1473e4a9de..eed854bb6194 100644
--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -218,6 +218,7 @@  static int kmmpd(void *data)
 				ext4_error_err(sb, -retval,
 					       "error reading MMP data: %d",
 					       retval);
+				EXT4_SB(sb)->s_mmp_bh = NULL;
 				goto wait_to_exit;
 			}