syzbot


WARNING in skb_checksum_help

Status: internal: reported on 2022/08/30 18:54
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 0d24148bd276 inet: ping: fix recent breakage
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 152d, last: 4d20h
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in skb_checksum_help 1 766d 766d 0/1 auto-closed as invalid on 2021/04/23 19:06

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 32527 at net/core/dev.c:3265 skb_checksum_help+0x4a2/0x600 net/core/dev.c:3265
Modules linked in:
CPU: 0 PID: 32527 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:skb_checksum_help+0x4a2/0x600 net/core/dev.c:3265
Code: e0 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 b3 75 ba f9 48 89 ef 41 bc ea ff ff ff e8 35 f9 ff ff eb d4 e8 9e 75 ba f9 <0f> 0b 0f b6 1d 61 d9 96 06 31 ff 89 de e8 fc 71 ba f9 84 db 0f 84
RSP: 0018:ffffc900164f7660 EFLAGS: 00010216
RAX: 0000000000007a73 RBX: 000000000000034a RCX: ffffc90003d91000
RDX: 0000000000040000 RSI: ffffffff87c6dc22 RDI: 0000000000000004
RBP: ffff888034dc53c0 R08: 0000000000000004 R09: 000000000000019a
R10: 0000000000000348 R11: 0000000000094001 R12: ffff888034dc5434
R13: 0000000000000000 R14: ffff888034dc5440 R15: 0000000000000348
FS:  00007f7c07b55700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000029b6d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netem_enqueue+0x2b36/0x3570 net/sched/sch_netem.c:510
 netem_enqueue+0x202f/0x3570 net/sched/sch_netem.c:483
 dev_qdisc_enqueue+0x46/0x390 net/core/dev.c:3778
 __dev_xmit_skb net/core/dev.c:3867 [inline]
 __dev_queue_xmit+0x2279/0x3ba0 net/core/dev.c:4215
 packet_snd net/packet/af_packet.c:3073 [inline]
 packet_sendmsg+0x334c/0x5500 net/packet/af_packet.c:3104
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xd3/0x120 net/socket.c:734
 __sys_sendto+0x23a/0x340 net/socket.c:2117
 __do_sys_sendto net/socket.c:2129 [inline]
 __se_sys_sendto net/socket.c:2125 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2125
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7c06e8c0d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7c07b55168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f7c06fabf80 RCX: 00007f7c06e8c0d9
RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007f7c06ee7ae9 R08: 0000000000000000 R09: 000000000000002f
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c070cfb1f R14: 00007f7c07b55300 R15: 0000000000022000
 </TASK>

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-upstream-kasan-gce 2022/12/20 15:40 upstream 6feb57c2fd7c d3e76707 .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-kasan-gce-root 2022/08/30 18:53 upstream dcf8e5633e2e 4a380809 .config console log report info WARNING in skb_checksum_help
ci-upstream-net-this-kasan-gce 2023/01/22 03:07 net 71ab9c3e2253 559a440a .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-this-kasan-gce 2023/01/19 05:19 net b9fb10d131b8 42660d9e .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-this-kasan-gce 2022/12/31 22:28 net d039535850ee ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-this-kasan-gce 2022/12/19 21:30 net 98dbec0a0adc c52b2efb .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-this-kasan-gce 2022/12/15 00:09 net 7ae9888d6e1c b18f0a64 .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-kasan-gce 2023/01/25 02:34 net-next c554520f2cbe 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-net-kasan-gce 2022/12/22 19:44 net-next c183e6c3ec34 c692fab1 .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
ci-upstream-gce-arm64 2023/01/24 19:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2e84eedb182e 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] WARNING in skb_checksum_help
* Struck through repros no longer work on HEAD.