From: Yunfeng Ye <yeyunfeng@xxxxxxxxxx> Subject: reiserfs: prevent NULL pointer dereference in reiserfs_insert_item() The variable inode may be NULL in reiserfs_insert_item(), but there is no check before accessing the member of inode. Fix this by adding NULL pointer check before calling reiserfs_debug(). Link: http://lkml.kernel.org/r/79c5135d-ff25-1cc9-4e99-9f572b88cc00@xxxxxxxxxx Signed-off-by: Yunfeng Ye <yeyunfeng@xxxxxxxxxx> Cc: zhengbin <zhengbin13@xxxxxxxxxx> Cc: Hu Shiyuan <hushiyuan@xxxxxxxxxx> Cc: Feilong Lin <linfeilong@xxxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/reiserfs/stree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/reiserfs/stree.c~reiserfs-prevent-null-pointer-dereference-in-reiserfs_insert_item +++ a/fs/reiserfs/stree.c @@ -2246,7 +2246,8 @@ error_out: /* also releases the path */ unfix_nodes(&s_ins_balance); #ifdef REISERQUOTA_DEBUG - reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE, + if (inode) + reiserfs_debug(th->t_super, REISERFS_DEBUG_CODE, "reiserquota insert_item(): freeing %u id=%u type=%c", quota_bytes, inode->i_uid, head2type(ih)); #endif _
