Re: [syzbot] [net?] KMSAN: uninit-value in __netif_receive_skb_core

From: syzbot
Date: Thu Jul 20 2023 - 17:25:48 EST


syzbot has bisected this issue to:

commit e420bed025071a623d2720a92bc2245c84757ecb
Author: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Date: Wed Jul 19 14:08:52 2023 +0000

bpf: Add fd-based tcx multi-prog infra with link support

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13dfaae6a80000
start commit: 03b123debcbc tcp: tcp_enter_quickack_mode() should be static
git tree: net-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=103faae6a80000
console output: https://syzkaller.appspot.com/x/log.txt?x=17dfaae6a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=32e3dcc11fd0d297
dashboard link: https://syzkaller.appspot.com/bug?extid=b202b7208664142954fa
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15cc32e6a80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16aace14a80000

Reported-by: syzbot+b202b7208664142954fa@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: e420bed02507 ("bpf: Add fd-based tcx multi-prog infra with link support")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection