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authorXue jiufei <xuejiufei@huawei.com>2015-06-24 16:55:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-24 17:49:39 -0700
commit74e364ad1b13fd518a0bd4e5aec56d5e8706152f (patch)
treefb2c14c51cf5c4d85252893e5a24ea2191ac19e4 /fs/ocfs2
parentfce56d841ef9ab0333423f2c8e329f7341e9f44c (diff)
downloadlinux-74e364ad1b13fd518a0bd4e5aec56d5e8706152f.tar.bz2
ocfs2: fix NULL pointer dereference in function ocfs2_abort_trigger()
ocfs2_abort_trigger() use bh->b_assoc_map to get sb. But there's no function to set bh->b_assoc_map in ocfs2, it will trigger NULL pointer dereference while calling this function. We can get sb from bh->b_bdev->bd_super instead of b_assoc_map. [akpm@linux-foundation.org: update comment, per Joseph] Signed-off-by: joyce.xue <xuejiufei@huawei.com> Cc: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/journal.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 72db49c0e2ab..69333bea6a1a 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -571,9 +571,7 @@ static void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *triggers,
(unsigned long)bh,
(unsigned long long)bh->b_blocknr);
- /* We aren't guaranteed to have the superblock here - but if we
- * don't, it'll just crash. */
- ocfs2_error(bh->b_assoc_map->host->i_sb,
+ ocfs2_error(bh->b_bdev->bd_super,
"JBD2 has aborted our journal, ocfs2 cannot continue\n");
}