syzbot


WARNING in ipgre_xmit

Status: internal: reported C repro on 2022/06/02 20:10
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 8d21e9963bec ip_gre: test csum_start instead of transport header
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: 241d, last: 224d

Cause bisection: introduced by (bisect log) :
commit 66e4c8d950083df8e12981babca788e1635c92b6
Author: Eric Dumazet <edumazet@google.com>
Date: Tue May 10 03:57:39 2022 +0000

  net: warn if transport header was not set

Crash: WARNING in ipgre_xmit (log)
Repro: C syz .config

Sample crash report:
netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
------------[ cut here ]------------
WARNING: CPU: 2 PID: 3668 at include/linux/skbuff.h:2904 skb_transport_header include/linux/skbuff.h:2904 [inline]
WARNING: CPU: 2 PID: 3668 at include/linux/skbuff.h:2904 skb_transport_offset include/linux/skbuff.h:3011 [inline]
WARNING: CPU: 2 PID: 3668 at include/linux/skbuff.h:2904 ipgre_xmit+0x894/0x970 net/ipv4/ip_gre.c:639
Modules linked in:
CPU: 2 PID: 3668 Comm: syz-executor204 Not tainted 5.18.0-syzkaller-12007-g17d8e3d90b69 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:skb_transport_header include/linux/skbuff.h:2904 [inline]
RIP: 0010:skb_transport_offset include/linux/skbuff.h:3011 [inline]
RIP: 0010:ipgre_xmit+0x894/0x970 net/ipv4/ip_gre.c:639
Code: 89 14 24 e8 ce 27 d0 f9 48 8b 14 24 e9 be f9 ff ff e8 e0 27 d0 f9 e9 02 fa ff ff e8 c6 27 d0 f9 e9 55 fa ff ff e8 3c 0a 84 f9 <0f> 0b e9 66 fa ff ff 48 8b 7c 24 08 e8 cb 27 d0 f9 e9 03 f8 ff ff
RSP: 0018:ffffc90002d4f350 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000000000ffff RCX: 0000000000000000
RDX: ffff888021f4c080 RSI: ffffffff87f5ab34 RDI: 0000000000000003
RBP: ffff888019bc0140 R08: 0000000000000003 R09: 000000000000ffff
R10: 000000000000ffff R11: 0000000000000001 R12: ffff88801edba000
R13: ffff888019bc01f4 R14: 0000000000000004 R15: ffff88801e8cd800
FS:  0000555556ad7300(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c9df94150 CR3: 000000001f07b000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:4805 [inline]
 netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 xmit_one net/core/dev.c:3588 [inline]
 dev_hard_start_xmit+0x188/0x880 net/core/dev.c:3604
 __dev_queue_xmit+0x2be8/0x3a00 net/core/dev.c:4253
 dev_queue_xmit include/linux/netdevice.h:2994 [inline]
 __bpf_tx_skb net/core/filter.c:2114 [inline]
 __bpf_redirect_no_mac net/core/filter.c:2139 [inline]
 __bpf_redirect+0x838/0xe50 net/core/filter.c:2162
 ____bpf_clone_redirect net/core/filter.c:2429 [inline]
 bpf_clone_redirect+0x2ae/0x420 net/core/filter.c:2401
 ___bpf_prog_run+0x3592/0x77d0 kernel/bpf/core.c:1850
 __bpf_prog_run512+0x91/0xd0 kernel/bpf/core.c:2079
 bpf_dispatcher_nop_func include/linux/bpf.h:869 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x381/0x9c0 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0xb5e/0x1e10 net/bpf/test_run.c:1155
 bpf_prog_test_run kernel/bpf/syscall.c:3591 [inline]
 __sys_bpf+0x15c1/0x5700 kernel/bpf/syscall.c:4935
 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5019
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f0c9df1b509
Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe04455228 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffe04455238 RCX: 00007f0c9df1b509
RDX: 0000000000000048 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe04455240
R13: 00007ffe04455260 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Crashes (9916):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-qemu-upstream 2022/06/03 05:35 upstream 17d8e3d90b69 02dddea8 .config console log report syz C WARNING in ipgre_xmit
ci-upstream-bpf-kasan-gce 2022/06/03 10:54 bpf e0491b11c131 02dddea8 .config strace log report syz C WARNING in ipgre_xmit
ci-upstream-bpf-kasan-gce 2022/06/03 09:54 bpf e0491b11c131 02dddea8 .config strace log report syz C WARNING in ipgre_xmit
ci-upstream-kasan-gce-selinux-root 2022/06/09 13:46 upstream 6bfb56e93bce 0d5abf15 .config console log report syz WARNING in ipgre_xmit
ci-upstream-kasan-gce-selinux-root 2022/06/07 18:28 upstream f2906aa86338 c8857892 .config console log report syz WARNING in ipgre_xmit
ci-upstream-kasan-gce-selinux-root 2022/06/07 09:18 upstream f2906aa86338 c8857892 .config console log report syz WARNING in ipgre_xmit
ci-upstream-kasan-gce-selinux-root 2022/06/07 05:19 upstream f2906aa86338 c8857892 .config console log report syz WARNING in ipgre_xmit
ci-upstream-kasan-gce-smack-root 2022/06/10 18:58 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-kasan-gce 2022/06/10 01:55 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-kasan-gce-selinux-root 2022/06/09 21:34 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-qemu-upstream 2022/06/09 17:00 upstream 34f4335c16a5 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-kasan-gce-root 2022/06/09 14:42 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-kasan-gce-386 2022/06/10 03:00 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-qemu-upstream-386 2022/06/09 15:42 upstream 6bfb56e93bce 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-qemu-upstream-386 2022/06/02 20:09 upstream 17d8e3d90b69 02dddea8 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-kasan-gce 2022/06/09 11:12 bpf 7c217aca85dd 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-net-this-kasan-gce 2022/06/08 19:49 net f5826c8c9d57 b2706118 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 23:13 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 21:49 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 20:15 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 18:53 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 18:43 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 17:40 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 16:26 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 15:06 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 14:05 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 12:55 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 11:39 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 09:20 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 09:11 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 08:57 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 05:07 bpf-next f5be22c64bd6 8f633d84 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 02:45 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 01:31 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 01:31 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/18 00:29 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 23:20 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 23:17 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 21:35 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 20:33 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 19:31 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 17:53 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 17:25 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 17:21 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 16:21 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 14:15 bpf-next 08c79c9cd67f cb58b3b2 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 12:08 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 11:27 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 10:27 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 09:19 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 09:06 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 08:44 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 07:29 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 06:19 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 04:37 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 03:27 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/17 00:21 bpf-next 3e6fe5ce4d48 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/16 22:55 bpf-next de5bb43826dd 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/16 20:18 bpf-next de5bb43826dd 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-bpf-next-kasan-gce 2022/06/16 20:13 bpf-next de5bb43826dd 1719ee24 .config console log report info WARNING in ipgre_xmit
ci-upstream-net-kasan-gce 2022/06/10 10:40 net-next 263efe85a4b6 0d5abf15 .config console log report info WARNING in ipgre_xmit
ci-upstream-linux-next-kasan-gce-root 2022/06/10 06:18 linux-next ff539ac73ea5 0d5abf15 .config console log report info WARNING in ipgre_xmit
* Struck through repros no longer work on HEAD.