Messages in this thread Patch in this message |  | | Subject | [PATCH] reiserfs: prevent NULL pointer dereference in reiserfs_insert_item() | From | Yunfeng Ye <> | Date | Mon, 16 Dec 2019 20:05:32 +0800 |
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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().
Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com> --- 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 da9ebe33882b..bb4973aefbb1 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 -- 2.7.4
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