[merged mm-hotfixes-stable] ocfs2-fix-possible-null-ptr-deref-in-ocfs2_set_buffer_uptodate.patch removed from -mm tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The quilt patch titled
     Subject: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate
has been removed from the -mm tree.  Its filename was
     ocfs2-fix-possible-null-ptr-deref-in-ocfs2_set_buffer_uptodate.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Lizhi Xu <lizhi.xu@xxxxxxxxxxxxx>
Subject: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate
Date: Mon, 2 Sep 2024 10:36:36 +0800

When doing cleanup, if flags without OCFS2_BH_READAHEAD, it may trigger
NULL pointer dereference in the following ocfs2_set_buffer_uptodate() if
bh is NULL.

Link: https://lkml.kernel.org/r/20240902023636.1843422-3-joseph.qi@xxxxxxxxxxxxxxxxx
Fixes: cf76c78595ca ("ocfs2: don't put and assigning null to bh allocated outside")
Signed-off-by: Lizhi Xu <lizhi.xu@xxxxxxxxxxxxx>
Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Reported-by: Heming Zhao <heming.zhao@xxxxxxxx>
Suggested-by: Heming Zhao <heming.zhao@xxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>	[4.20+]
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/ocfs2/buffer_head_io.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/ocfs2/buffer_head_io.c~ocfs2-fix-possible-null-ptr-deref-in-ocfs2_set_buffer_uptodate
+++ a/fs/ocfs2/buffer_head_io.c
@@ -388,7 +388,8 @@ read_failure:
 		/* Always set the buffer in the cache, even if it was
 		 * a forced read, or read-ahead which hasn't yet
 		 * completed. */
-		ocfs2_set_buffer_uptodate(ci, bh);
+		if (bh)
+			ocfs2_set_buffer_uptodate(ci, bh);
 	}
 	ocfs2_metadata_cache_io_unlock(ci);
 
_

Patches currently in -mm which might be from lizhi.xu@xxxxxxxxxxxxx are






[Index of Archives]     [Kernel Archive]     [IETF Annouce]     [DCCP]     [Netdev]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux SCSI]

  Powered by Linux