syzbot

 sign-in | mailing list | source | docs
🐞 Open [78]
🐞 Fixed [22]
🐞 Invalid [344]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

general protection fault in rtm_new_nexthop

Status: upstream: reported C repro on 2020/08/09 03:34
Reported-by: syzbot+654a00dfec8ec177f15f@syzkaller.appspotmail.com
First crash: 1760d, last: 35d
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/06/02 16:34 15m retest repro android12-5.4 error
2025/04/25 22:17 5m retest repro android12-5.4 report log
2025/03/24 00:43 5m retest repro android12-5.4 report log
2025/02/14 11:47 10m retest repro android12-5.4 report log
2025/01/10 21:10 2m retest repro android12-5.4 error
2024/11/01 20:23 5m retest repro android12-5.4 report log
2024/08/23 00:48 33m retest repro android12-5.4 report log
2024/06/13 23:47 16m retest repro android12-5.4 report log
2024/04/04 21:37 21m retest repro android12-5.4 report log
2024/01/25 19:39 6m retest repro android12-5.4 report log

Sample crash report:
RSP: 002b:00007ffe0ad1a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe0ad1a170 RCX: 00007f1b602562e9
RDX: 0000000000004000 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007ffe0ad19f07 R09: 00007f1b60210035
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0ad1a3d8 R14: 0000000000000001 R15: 0000000000000001
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 357 Comm: syz-executor283 Not tainted 5.4.289-syzkaller-00025-g49530c73f82d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:nexthop_create_group net/ipv4/nexthop.c:1135 [inline]
RIP: 0010:nexthop_add net/ipv4/nexthop.c:1320 [inline]
RIP: 0010:rtm_new_nexthop+0x24d4/0x6ae0 net/ipv4/nexthop.c:1519
Code: 00 80 3c 01 00 74 0a 48 8b 7c 24 20 e8 85 72 d1 fd 48 8b 44 24 20 4c 89 30 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 5e 72 d1 fd 48 8b 44 24 20 49 89 06
RSP: 0018:ffff8881ee63f0a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881f5c02a00
RBP: ffff8881ee63f4b0 R08: ffffffff824713f8 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff1103dcc7e2c
R13: 0000000000010001 R14: 0000000000000000 R15: 1ffffffff0c7333c
FS:  000055556ee27480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045b630 CR3: 00000001d9480000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rtnetlink_rcv_msg+0x983/0xc70 net/core/rtnetlink.c:5290
 netlink_rcv_skb+0x1d5/0x420 net/netlink/af_netlink.c:2467
 netlink_unicast_kernel net/netlink/af_netlink.c:1306 [inline]
 netlink_unicast+0x936/0xb20 net/netlink/af_netlink.c:1332
 netlink_sendmsg+0xa18/0xcf0 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:638 [inline]
 __sock_sendmsg net/socket.c:650 [inline]
 ____sys_sendmsg+0x5ac/0x8f0 net/socket.c:2306
 ___sys_sendmsg net/socket.c:2360 [inline]
 __sys_sendmsg+0x28b/0x380 net/socket.c:2406
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f1b602562e9
Code: 48 83 c4 28 c3 e8 17 1a 00 00 0f 1f 80 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe0ad1a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffe0ad1a170 RCX: 00007f1b602562e9
RDX: 0000000000004000 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00007ffe0ad19f07 R09: 00007f1b60210035
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe0ad1a3d8 R14: 0000000000000001 R15: 0000000000000001
Modules linked in:
---[ end trace d208ca9dbd36a09c ]---
RIP: 0010:nexthop_create_group net/ipv4/nexthop.c:1135 [inline]
RIP: 0010:nexthop_add net/ipv4/nexthop.c:1320 [inline]
RIP: 0010:rtm_new_nexthop+0x24d4/0x6ae0 net/ipv4/nexthop.c:1519
Code: 00 80 3c 01 00 74 0a 48 8b 7c 24 20 e8 85 72 d1 fd 48 8b 44 24 20 4c 89 30 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 f7 e8 5e 72 d1 fd 48 8b 44 24 20 49 89 06
RSP: 0018:ffff8881ee63f0a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881f5c02a00
RBP: ffff8881ee63f4b0 R08: ffffffff824713f8 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 1ffff1103dcc7e2c
R13: 0000000000010001 R14: 0000000000000000 R15: 1ffffffff0c7333c
FS:  000055556ee27480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045b630 CR3: 00000001d9480000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 80 3c 01 00 74    	add    %al,0x7400013c(%rax)
   6:	0a 48 8b             	or     -0x75(%rax),%cl
   9:	7c 24                	jl     0x2f
   b:	20 e8                	and    %ch,%al
   d:	85 72 d1             	test   %esi,-0x2f(%rdx)
  10:	fd                   	std
  11:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
  16:	4c 89 30             	mov    %r14,(%rax)
  19:	4c 89 f0             	mov    %r14,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 f7             	mov    %r14,%rdi
  33:	e8 5e 72 d1 fd       	call   0xfdd17296
  38:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
  3d:	49 89 06             	mov    %rax,(%r14)

Crashes (27):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/31 11:21 android12-5.4 49530c73f82d 4c6ac32f .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2022/09/13 17:15 android12-5.4 704c7d053806 a08652b0 .config console log report syz C ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2020/08/09 03:41 https://android.googlesource.com/kernel/common android-5.4 99256a8c206b f721e4a0 .config console log report syz C ci2-android-5-4-kasan
2025/04/30 04:09 android12-5.4 cd8e74fa0fa3 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2025/04/30 04:05 android12-5.4 cd8e74fa0fa3 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2025/04/27 05:10 android12-5.4 cd8e74fa0fa3 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2025/03/09 13:09 android12-5.4 6b07fcd94a6a 163f510d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2025/01/31 10:25 android12-5.4 49530c73f82d 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2025/01/31 10:19 android12-5.4 49530c73f82d 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2022/11/22 03:49 android12-5.4 c80a5b2e7f63 1c576c23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2022/07/31 14:50 android12-5.4 2bde2e268ec7 fef302b1 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2022/07/21 13:37 android12-5.4 330fa791a029 6e67af9d .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2022/06/19 05:00 android12-5.4 77dc925ddffb 8f633d84 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2021/11/28 05:41 android12-5.4 0bbc71d87f4d 63eeac02 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2021/11/25 17:05 android12-5.4 697fba25ed27 545ab074 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2021/11/19 10:13 android12-5.4 2cdbd9b44172 31a30fc0 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2021/11/16 08:40 android12-5.4 b9c4f1b9b54a 75b04091 .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2021/02/20 06:28 android12-5.4 35f4b1b90596 f689d40a .config console log report info ci2-android-5-4-kasan general protection fault in rtm_new_nexthop
2020/09/11 15:19 https://android.googlesource.com/kernel/common android-5.4 aa0ddbda9397 adfb8b4e .config console log report ci2-android-5-4-kasan
2020/08/27 11:44 https://android.googlesource.com/kernel/common android-5.4 4915c32a2f6b 816e0689 .config console log report ci2-android-5-4-kasan
2020/08/24 12:54 https://android.googlesource.com/kernel/common android-5.4 8c7bf5fe0edb 67b599d1 .config console log report ci2-android-5-4-kasan
2020/08/23 19:03 https://android.googlesource.com/kernel/common android-5.4 d457f47f3685 a6d5f3ad .config console log report ci2-android-5-4-kasan
2020/08/17 14:50 https://android.googlesource.com/kernel/common android-5.4 0881b55787d3 5ce13532 .config console log report ci2-android-5-4-kasan
2020/08/12 17:53 https://android.googlesource.com/kernel/common android-5.4 46090d578669 0d7bd2e0 .config console log report ci2-android-5-4-kasan
2020/08/12 17:53 https://android.googlesource.com/kernel/common android-5.4 46090d578669 0d7bd2e0 .config console log report ci2-android-5-4-kasan
2020/08/09 08:39 https://android.googlesource.com/kernel/common android-5.4 99256a8c206b f721e4a0 .config console log report ci2-android-5-4-kasan
2020/08/09 03:34 https://android.googlesource.com/kernel/common android-5.4 99256a8c206b f721e4a0 .config console log report ci2-android-5-4-kasan
* Struck through repros no longer work on HEAD.