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authorYunfeng Ye <yeyunfeng@huawei.com>2020-01-31 09:17:26 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-01-31 21:30:41 +0300
commitaacee5446a2a1aa35d0a49dab289552578657fb4 (patch)
treeba28a9321a427dc2be27b549bbf99f930d4a9018
parentf596ded1a044517afc4e9325f0dea449858450ac (diff)
downloadlinux-aacee5446a2a1aa35d0a49dab289552578657fb4.tar.xz
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@huawei.com Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com> Cc: zhengbin <zhengbin13@huawei.com> Cc: Hu Shiyuan <hushiyuan@huawei.com> Cc: Feilong Lin <linfeilong@huawei.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/reiserfs/stree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c
index da9ebe33882b..bb4973aefbb1 100644
--- a/fs/reiserfs/stree.c
+++ b/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