| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <CANpmjNM7cCDoLUGV4J+MfAbQFedmEXhNrhf7fYiFs7Gi7Yz0mg@mail.gmail.com> Date: Thu, 25 Sep 2025 09:16:42 +0200 From: Marco Elver <elver@...gle.com> To: syzbot ci <syzbot+ci4290219e4732157d@...kaller.appspotmail.com> Cc: alvaro.karsz@...id-run.com, andrew@...n.ch, davem@...emloft.net, edumazet@...gle.com, eperezma@...hat.com, hengqi@...ux.alibaba.com, jasowang@...hat.com, jiri@...nulli.us, kuba@...nel.org, mst@...hat.com, netdev@...r.kernel.org, pabeni@...hat.com, virtualization@...ts.linux.dev, willemb@...gle.com, xuanzhuo@...ux.alibaba.com, syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot ci] Re: fixes two virtio-net related bugs. #syz upstream On Thu, 25 Sept 2025 at 09:13, syzbot ci <syzbot+ci4290219e4732157d@...kaller.appspotmail.com> wrote: > > syzbot ci has tested the following series > > [v1] fixes two virtio-net related bugs. > https://lore.kernel.org/all/20250925022537.91774-1-xuanzhuo@linux.alibaba.com > * [PATCH net 1/2] virtio-net: fix incorrect flags recording in big mode > * [PATCH net 2/2] virtio-net: correct hdr_len handling for VIRTIO_NET_F_GUEST_HDRLEN > > and found the following issue: > WARNING in virtio_net_hdr_from_skb > > Full report is available here: > https://ci.syzbot.org/series/41a78b3d-b982-4507-b02f-1991c8d827c9 > > *** > > WARNING in virtio_net_hdr_from_skb > > tree: net > URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git > base: f8b4687151021db61841af983f1cb7be6915d4ef > arch: amd64 > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > config: https://ci.syzbot.org/builds/bb3f28da-9370-44d7-be20-9c443d5ebfc9/config > C repro: https://ci.syzbot.org/findings/7af48589-24a5-4e09-bfe0-1969f5d98f4d/c_repro > syz repro: https://ci.syzbot.org/findings/7af48589-24a5-4e09-bfe0-1969f5d98f4d/syz_repro > > syz.0.17 uses obsolete (PF_INET,SOCK_PACKET) > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 6010 at ./include/linux/skbuff.h:3024 skb_transport_header include/linux/skbuff.h:3024 [inline] > WARNING: CPU: 0 PID: 6010 at ./include/linux/skbuff.h:3024 skb_transport_offset include/linux/skbuff.h:3175 [inline] > WARNING: CPU: 0 PID: 6010 at ./include/linux/skbuff.h:3024 virtio_net_hdr_from_skb+0x669/0xa30 include/linux/virtio_net.h:222 > Modules linked in: > CPU: 0 UID: 0 PID: 6010 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 > RIP: 0010:skb_transport_header include/linux/skbuff.h:3024 [inline] > RIP: 0010:skb_transport_offset include/linux/skbuff.h:3175 [inline] > RIP: 0010:virtio_net_hdr_from_skb+0x669/0xa30 include/linux/virtio_net.h:222 > Code: 00 00 00 fc ff df 0f b6 04 10 84 c0 0f 85 b0 03 00 00 41 c6 45 00 05 48 8b 74 24 08 83 c6 08 e9 ca fd ff ff e8 c8 1c 72 f7 90 <0f> 0b 90 e9 a7 fa ff ff e8 ba 1c 72 f7 90 0f 0b 90 e9 62 fc ff ff > RSP: 0018:ffffc90002def490 EFLAGS: 00010293 > RAX: ffffffff8a4da238 RBX: 1ffff11004dafca6 RCX: ffff888023c9b980 > RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff > RBP: 1ffff1100537cbd8 R08: ffff88804138e059 R09: 0000000000000000 > R10: ffff88804138e050 R11: ffffed1008271c0c R12: ffff888029be4000 > R13: ffff888026d7e536 R14: ffff888029be5ec4 R15: 000000000000ffff > FS: 0000555557e59500(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000200000003000 CR3: 00000000414a0000 CR4: 00000000000006f0 > Call Trace: > <TASK> > tpacket_rcv+0x15c8/0x3290 net/packet/af_packet.c:2416 > __netif_receive_skb_one_core net/core/dev.c:5991 [inline] > __netif_receive_skb+0x164/0x380 net/core/dev.c:6104 > netif_receive_skb_internal net/core/dev.c:6190 [inline] > netif_receive_skb+0x1cb/0x790 net/core/dev.c:6249 > tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485 > tun_get_user+0x2aa2/0x3e20 drivers/net/tun.c:1950 > tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1996 > new_sync_write fs/read_write.c:593 [inline] > vfs_write+0x5c9/0xb30 fs/read_write.c:686 > ksys_write+0x145/0x250 fs/read_write.c:738 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7fe74f78ec29 > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007fffd7d9aa28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 > RAX: ffffffffffffffda RBX: 00007fe74f9d5fa0 RCX: 00007fe74f78ec29 > RDX: 0000000000000fb5 RSI: 0000200000002780 RDI: 0000000000000004 > RBP: 00007fe74f811e41 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fe74f9d5fa0 R14: 00007fe74f9d5fa0 R15: 0000000000000003 > </TASK> > > > *** > > If these findings have caused you to resend the series or submit a > separate fix, please add the following tag to your commit message: > Tested-by: syzbot@...kaller.appspotmail.com > > --- > This report is generated by a bot. It may contain errors. > syzbot ci engineers can be reached at syzkaller@...glegroups.com. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@...glegroups.com. > To view this discussion visit https://groups.google.com/d/msgid/syzkaller-bugs/68d4eb92.050a0220.25d7ab.0003.GAE%40google.com.
Powered by blists - more mailing lists