syzbot


WARNING in skb_checksum_help

Status: fixed on 2023/02/24 13:50
Subsystems: net
[Documentation on labels]
Fix commit: 0d24148bd276 inet: ping: fix recent breakage
First crash: 685d, last: 513d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in skb_checksum_help 1 1299d 1299d 0/1 auto-closed as invalid on 2021/04/23 19:06
linux-5.15 WARNING in skb_checksum_help origin:upstream C 3286 1d22h 403d 0/3 upstream: reported C repro on 2023/06/08 17:54
upstream WARNING in skb_checksum_help (2) net C done 3816 208d 298d 25/27 fixed on 2023/12/21 03:45
linux-6.1 WARNING in skb_checksum_help origin:upstream C 2509 1d15h 403d 0/3 upstream: reported C repro on 2023/06/08 17:53

Sample crash report:
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 17576 at net/core/dev.c:3265 skb_checksum_help+0x4a2/0x600 net/core/dev.c:3265
Modules linked in:
CPU: 0 PID: 17576 Comm: syz-executor.0 Not tainted 6.2.0-rc7-syzkaller-00018-g0983f6bf2bfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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 83 be b7 f9 48 89 ef 41 bc ea ff ff ff e8 35 f9 ff ff eb d4 e8 6e be b7 f9 <0f> 0b 0f b6 1d ff dd 94 06 31 ff 89 de e8 cc ba b7 f9 84 db 0f 84
RSP: 0018:ffffc9000d8f7660 EFLAGS: 00010216
RAX: 00000000000079d5 RBX: 000000000000034a RCX: ffffc9000b2b9000
RDX: 0000000000040000 RSI: ffffffff87c939a2 RDI: 0000000000000004
RBP: ffff888028e88000 R08: 0000000000000004 R09: 000000000000019a
R10: 0000000000000348 R11: 0000000000094001 R12: ffff888028e88074
R13: 0000000000000000 R14: ffff888028e88080 R15: 0000000000000348
FS:  00007fd79061e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000009a100000 CR4: 0000000000350ef0
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: 0033:0x7fd78f88c0f9
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:00007fd79061e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd78f9abf80 RCX: 00007fd78f88c0f9
RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007fd78f8e7ae9 R08: 0000000000000000 R09: 000000000000002f
R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea06e42ef R14: 00007fd79061e300 R15: 0000000000022000
 </TASK>

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/08 23:56 upstream 0983f6bf2bfc fc9c934e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in skb_checksum_help
2022/12/20 15:40 upstream 6feb57c2fd7c d3e76707 .config console log report info ci-upstream-kasan-gce WARNING in skb_checksum_help
2022/08/30 18:53 upstream dcf8e5633e2e 4a380809 .config console log report info ci-upstream-kasan-gce-root WARNING in skb_checksum_help
2023/02/19 04:14 net-old ec35307e18ba bcdf85f8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2023/02/17 22:20 net-old ec35307e18ba 3e7039f4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2023/02/03 09:25 net-old edb9b8f380c3 16d19e30 .config console log report info ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2023/01/22 03:07 net-old 71ab9c3e2253 559a440a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2023/01/19 05:19 net-old b9fb10d131b8 42660d9e .config console log report info ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2022/12/31 22:28 net-old d039535850ee ab32d508 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2022/12/19 21:30 net-old 98dbec0a0adc c52b2efb .config console log report info ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2022/12/15 00:09 net-old 7ae9888d6e1c b18f0a64 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in skb_checksum_help
2023/02/04 22:11 net-next-old 042b7858d50f be607b78 .config console log report info ci-upstream-net-kasan-gce WARNING in skb_checksum_help
2023/01/25 02:34 net-next-old c554520f2cbe 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in skb_checksum_help
2022/12/22 19:44 net-next-old c183e6c3ec34 c692fab1 .config console log report info ci-upstream-net-kasan-gce WARNING in skb_checksum_help
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] ci-upstream-gce-arm64 WARNING in skb_checksum_help
* Struck through repros no longer work on HEAD.