| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 178/191] reiserfs: prevent NULL pointer dereference in reiserfs_insert_item() | Date | Fri, 21 Feb 2020 08:42:31 +0100 |
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From: Yunfeng Ye <yeyunfeng@huawei.com>
[ Upstream commit aacee5446a2a1aa35d0a49dab289552578657fb4 ]
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> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/reiserfs/stree.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index 0037aea97d39a..2946713cb00d6 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -2250,7 +2250,8 @@ 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 -- 2.20.1
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