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| author | Yunfeng Ye <yeyunfeng@huawei.com> | 2020-01-30 22:17:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 10:30:41 -0800 |
| commit | aacee5446a2a1aa35d0a49dab289552578657fb4 (patch) | |
| tree | ba28a9321a427dc2be27b549bbf99f930d4a9018 /fs/reiserfs | |
| parent | f596ded1a044517afc4e9325f0dea449858450ac (diff) | |
| download | lwn-aacee5446a2a1aa35d0a49dab289552578657fb4.tar.gz lwn-aacee5446a2a1aa35d0a49dab289552578657fb4.zip | |
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>
Diffstat (limited to 'fs/reiserfs')
| -rw-r--r-- | fs/reiserfs/stree.c | 3 |
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 |