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Date: Fri, 14 Feb 2020 10:48:20 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Yunfeng Ye <yeyunfeng@...wei.com>, zhengbin <zhengbin13@...wei.com>, Hu Shiyuan <hushiyuan@...wei.com>, Feilong Lin <linfeilong@...wei.com>, Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Sasha Levin <sashal@...nel.org>, reiserfs-devel@...r.kernel.org Subject: [PATCH AUTOSEL 5.5 508/542] reiserfs: prevent NULL pointer dereference in reiserfs_insert_item() From: Yunfeng Ye <yeyunfeng@...wei.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@...wei.com> Cc: zhengbin <zhengbin13@...wei.com> Cc: Hu Shiyuan <hushiyuan@...wei.com> Cc: Feilong Lin <linfeilong@...wei.com> Cc: Jan Kara <jack@...e.cz> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Sasha Levin <sashal@...nel.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 da9ebe33882b7..bb4973aefbb18 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -2246,7 +2246,8 @@ int reiserfs_insert_item(struct reiserfs_transaction_handle *th, /* 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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