linux-kernel - [PATCH] set block device for dummy log . In this fix try to avoid null in the call bio_set_dev(bio, bdev) because in case bdev is null we have NULL pointer dereference ticket reference https://bugzilla.kernel.org/show

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Message-Id: <1560780801-5364-1-git-send-email-alexander198961@gmail.com>
Date:   Mon, 17 Jun 2019 14:13:21 +0000
From:   Kovtunenko Oleksandr <alexander198961@...il.com>
To:     shaggy@...nel.org, jfs-discussion@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Cc:     alexander198961@...il.com
Subject: [PATCH] set block device for dummy log . In this fix try to avoid null in the call  bio_set_dev(bio, bdev) because in case bdev is null we  have  NULL pointer dereference ticket reference https://bugzilla.kernel.org/show_bug.cgi?id=203737

---
 fs/jfs/jfs_logmgr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 6b68df3..3cd7026 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1223,6 +1223,7 @@ static int open_dummy_log(struct super_block *sb)
 		/* Make up some stuff */
 		dummy_log->base = 0;
 		dummy_log->size = 1024;
+         	dummy_log->bdev = sb->s_bdev;
 		rc = lmLogInit(dummy_log);
 		if (rc) {
 			kfree(dummy_log);
-- 
1.8.3.1