From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+4f66250f6663c0c1d67e@syzkaller.appspotmail.com>
Cc: edumazet@google.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [tipc?] kernel BUG in __pskb_pull_tail
Date: Sat, 14 Dec 2024 07:08:20 +0800 [thread overview]
Message-ID: <20241213230820.1957-1-hdanton@sina.com> (raw)
In-Reply-To: <675b61aa.050a0220.599f4.00bb.GAE@google.com>
On Thu, 12 Dec 2024 14:20:26 -0800
> syzbot found the following issue on:
>
> HEAD commit: 96b6fcc0ee41 Merge branch 'net-dsa-cleanup-eee-part-1'
> git tree: net-next
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117844f8580000
Test fix (https://patchwork.kernel.org/project/netdevbpf/patch/20241212222247.724674-1-edumazet@google.com/ )
#syz test
--- x/drivers/net/tun.c
+++ y/drivers/net/tun.c
@@ -1485,7 +1485,7 @@ static struct sk_buff *tun_napi_alloc_fr
skb->truesize += skb->data_len;
for (i = 1; i < it->nr_segs; i++) {
- const struct iovec *iov = iter_iov(it);
+ const struct iovec *iov = iter_iov(it) + i;
size_t fragsz = iov->iov_len;
struct page *page;
void *frag;
--
next prev parent reply other threads:[~2024-12-13 23:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-12 22:20 [syzbot] [tipc?] kernel BUG in __pskb_pull_tail syzbot
2024-12-13 11:43 ` syzbot
2024-12-13 12:19 ` Eric Dumazet
2024-12-13 23:08 ` Hillf Danton [this message]
2024-12-13 23:37 ` syzbot
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