From: syzbot <syzbot+29fc8991b0ecb186cf40@syzkaller.appspotmail.com>
To: contact@arnaud-lcm.com
Cc: andrew@lunn.ch, contact@arnaud-lcm.com, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org,
linux-kernel@vger.kernel.org, linux-ppp@vger.kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot]
Date: Mon, 07 Apr 2025 07:17:12 -0700 [thread overview]
Message-ID: <67f3de68.050a0220.396535.054f.GAE@google.com> (raw)
In-Reply-To: <20250407141705.92770-1-contact@arnaud-lcm.com>
> Author: contact@arnaud-lcm.com
>
> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
want either no args or 2 args (repo, branch), got 5
>
> diff --git a/drivers/net/ppp/ppp_synctty.c b/drivers/net/ppp/ppp_synctty.c
> index 644e99fc3623..520d895acc60 100644
> --- a/drivers/net/ppp/ppp_synctty.c
> +++ b/drivers/net/ppp/ppp_synctty.c
> @@ -506,6 +506,11 @@ ppp_sync_txmunge(struct syncppp *ap, struct sk_buff *skb)
> unsigned char *data;
> int islcp;
>
> + /* Ensure we can safely access protocol field and LCP code */
> + if (!skb || !pskb_may_pull(skb, 3)) {
> + kfree_skb(skb);
> + return NULL;
> + }
> data = skb->data;
> proto = get_unaligned_be16(data);
next prev parent reply other threads:[~2025-04-07 14:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-13 18:25 [syzbot] [ppp?] KMSAN: uninit-value in ppp_sync_send (2) syzbot
2025-04-07 14:06 ` [syzbot] Arnaud Lecomte
2025-04-07 14:26 ` [syzbot] [ppp?] KMSAN: uninit-value in ppp_sync_send (2) syzbot
2025-04-07 14:17 ` [syzbot] Arnaud Lecomte
2025-04-07 14:17 ` syzbot [this message]
2025-04-07 14:17 ` [syzbot] Arnaud Lecomte
2025-04-07 14:54 ` [syzbot] [ppp?] KMSAN: uninit-value in ppp_sync_send (2) syzbot
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