The patch titled
ext4: fix NULL pointer deref in journal_wait_on_commit_record()
has been added to the -mm tree. Its filename is
ext4-fix-null-pointer-deref-in-journal_wait_on_commit_record.patch
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------------------------------------------------------
Subject: ext4: fix NULL pointer deref in journal_wait_on_commit_record()
From: Mingming Cao <[EMAIL PROTECTED]>
Fix http://bugzilla.kernel.org/show_bug.cgi?id=9849
The buffer head pointer passed to journal_wait_on_commit_record() could be
NULL if the previous journal_submit_commit_record() failed or journal has
already aborted.
We need to check the error returns from journal_submit_commit_record() and
avoid calling journal_wait_on_commit_record() in the failure case.
Signed-off-by: Mingming Cao <[EMAIL PROTECTED]>
Cc: Eric Sandeen <[EMAIL PROTECTED]>
Cc: Girish Shilamkar <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Cc: Theodore Ts'o <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
fs/jbd2/commit.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN
fs/jbd2/commit.c~ext4-fix-null-pointer-deref-in-journal_wait_on_commit_record
fs/jbd2/commit.c
---
a/fs/jbd2/commit.c~ext4-fix-null-pointer-deref-in-journal_wait_on_commit_record
+++ a/fs/jbd2/commit.c
@@ -870,7 +870,8 @@ wait_for_iobuf:
if (err)
__jbd2_journal_abort_hard(journal);
}
- err = journal_wait_on_commit_record(cbh);
+ if (!err && !is_journal_aborted(journal))
+ err = journal_wait_on_commit_record(cbh);
if (err)
jbd2_journal_abort(journal, err);
_
Patches currently in -mm which might be from [EMAIL PROTECTED] are
export-iov_shorten-for-ext4s-use.patch
export-iov_shorten-for-ext4s-use-fix.patch
ext4-fix-null-pointer-deref-in-journal_wait_on_commit_record.patch
-
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