general protection fault in __vxlan_dev_create

Status: upstream: reported C repro on 2020/07/22 21:12
Reported-by: syzbot+9068a12c7c348a940af2@syzkaller.appspotmail.com
First crash: 2222d, last: 1280d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 general protection fault in __vxlan_dev_create 2 syz, C error 275 1796d 2252d 0/1 upstream: reported C repro on 2020/06/23 01:33
▶ ▼ Fix bisection attempts (25)
Created Duration User Patch Repo Result
2023/02/19 06:08 32m bisect fix linux-4.14.y OK (0) job log log
2023/01/19 23:44 31m bisect fix linux-4.14.y OK (0) job log log
2022/10/26 21:08 26m bisect fix linux-4.14.y OK (0) job log log
2022/09/19 02:15 26m bisect fix linux-4.14.y OK (0) job log log
2022/08/20 01:44 30m bisect fix linux-4.14.y OK (0) job log log
2022/07/21 00:30 28m bisect fix linux-4.14.y OK (0) job log log
2022/06/21 00:04 25m bisect fix linux-4.14.y OK (0) job log log
2022/05/21 23:35 29m bisect fix linux-4.14.y OK (0) job log log
2022/04/21 23:12 22m bisect fix linux-4.14.y OK (0) job log log
2022/03/22 22:41 30m bisect fix linux-4.14.y OK (0) job log log
2022/02/20 05:51 33m bisect fix linux-4.14.y OK (0) job log log
2022/01/21 05:22 26m bisect fix linux-4.14.y OK (0) job log log
2021/12/22 03:39 26m bisect fix linux-4.14.y OK (0) job log log
2021/11/22 03:10 28m bisect fix linux-4.14.y OK (0) job log log
2021/10/23 02:43 26m bisect fix linux-4.14.y OK (0) job log log
2021/09/22 07:06 28m bisect fix linux-4.14.y OK (0) job log log
2021/08/23 06:27 31m bisect fix linux-4.14.y OK (0) job log log
2021/07/24 05:40 29m bisect fix linux-4.14.y OK (0) job log log
2021/06/23 23:04 22m bisect fix linux-4.14.y OK (0) job log log
2021/05/24 22:29 29m bisect fix linux-4.14.y OK (0) job log log
2021/04/24 21:41 23m bisect fix linux-4.14.y OK (0) job log log
2021/03/25 13:11 21m bisect fix linux-4.14.y OK (0) job log log
2021/02/23 10:54 22m bisect fix linux-4.14.y OK (0) job log log
2021/02/19 06:27 19m bisect fix linux-4.14.y error job log
2021/01/19 12:57 22m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
audit: type=1400 audit(1595571743.201:8): avc:  denied  { execmem } for  pid=6341 comm="syz-executor300" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
netlink: 24 bytes leftover after parsing attributes in process `syz-executor300'.
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
Modules linked in:
CPU: 1 PID: 6359 Comm: syz-executor300 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809b3fc180 task.stack: ffff888097ed8000
RIP: 0010:__write_once_size include/linux/compiler.h:210 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:427 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline]
RIP: 0010:__vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274
RSP: 0018:ffff888097edf178 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff11012fdbe31 RCX: 1ffff11012fdbe20
RDX: 1bd5a00000000040 RSI: ffff88809b3fca30 RDI: ffff8880a7dab888
RBP: 0000000000000000 R08: ffffffff8a0979f8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff8880a7dab880 R14: dead000000000200 R15: ffff88808605a200
FS:  00007efce5dca700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efce5dc9db8 CR3: 00000000a117c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vxlan_newlink+0xa3/0xe0 drivers/net/vxlan.c:3495
 rtnl_newlink+0xf88/0x1810 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315
 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 sock_no_sendpage+0xe2/0x110 net/core/sock.c:2574
 kernel_sendpage net/socket.c:3407 [inline]
 sock_sendpage+0xdf/0x140 net/socket.c:871
 pipe_to_sendpage+0x226/0x2d0 fs/splice.c:451
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x326/0x7a0 fs/splice.c:626
 splice_from_pipe fs/splice.c:661 [inline]
 generic_splice_sendpage+0xc1/0x110 fs/splice.c:832
 do_splice_from fs/splice.c:851 [inline]
 do_splice fs/splice.c:1147 [inline]
 SYSC_splice fs/splice.c:1402 [inline]
 SyS_splice+0xd59/0x1380 fs/splice.c:1382
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x44a179
RSP: 002b:00007efce5dc9cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 000000000044a179
RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00000000006dbc50 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c
R13: 00007ffff019aadf R14: 00007efce5dca9c0 R15: 20c49ba5e353f7cf
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 09 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 08 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 dd 02 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 
RIP: __write_once_size include/linux/compiler.h:210 [inline] RSP: ffff888097edf178
RIP: __hlist_del include/linux/list.h:679 [inline] RSP: ffff888097edf178
RIP: hlist_del_rcu include/linux/rculist.h:427 [inline] RSP: ffff888097edf178
RIP: vxlan_fdb_destroy drivers/net/vxlan.c:787 [inline] RSP: ffff888097edf178
RIP: __vxlan_dev_create+0x5d6/0x970 drivers/net/vxlan.c:3274 RSP: ffff888097edf178
---[ end trace a21bf13a87774a16 ]---

Crashes (238):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/24 06:25 linux-4.14.y 69b94dd6dcd1 70c104a1 .config console log report syz C ci2-linux-4-14
2020/10/21 05:50 linux-4.14.y cbfa1702aaf6 ff4a3345 .config console log report info ci2-linux-4-14
2020/10/19 10:55 linux-4.14.y cbfa1702aaf6 ff4a3345 .config console log report info ci2-linux-4-14
2020/10/12 11:52 linux-4.14.y cbfa1702aaf6 4a77ae0b .config console log report info ci2-linux-4-14
2020/10/11 20:21 linux-4.14.y cbfa1702aaf6 4a77ae0b .config console log report info ci2-linux-4-14
2020/10/11 17:47 linux-4.14.y cbfa1702aaf6 4a77ae0b .config console log report info ci2-linux-4-14
2020/10/08 22:53 linux-4.14.y cbfa1702aaf6 92390980 .config console log report info ci2-linux-4-14
2020/10/08 12:34 linux-4.14.y cbfa1702aaf6 92390980 .config console log report info ci2-linux-4-14
2020/10/04 23:04 linux-4.14.y cbfa1702aaf6 5ef9c291 .config console log report info ci2-linux-4-14
2020/10/04 18:56 linux-4.14.y cbfa1702aaf6 5ef9c291 .config console log report info ci2-linux-4-14
2020/09/30 15:05 linux-4.14.y cbfa1702aaf6 8516f6d3 .config console log report info ci2-linux-4-14
2020/09/29 22:08 linux-4.14.y cbfa1702aaf6 5abc3f1a .config console log report info ci2-linux-4-14
2020/09/27 19:42 linux-4.14.y cbfa1702aaf6 5dd8aee8 .config console log report info ci2-linux-4-14
2020/09/24 23:13 linux-4.14.y cbfa1702aaf6 54289b08 .config console log report info ci2-linux-4-14
2020/09/23 13:44 linux-4.14.y cbfa1702aaf6 287cd75a .config console log report info ci2-linux-4-14
2020/09/21 01:41 linux-4.14.y cbfa1702aaf6 9564d2e9 .config console log report info ci2-linux-4-14
2020/09/12 05:06 linux-4.14.y 458a534cac0c 79fb24e2 .config console log report ci2-linux-4-14
2020/09/11 01:56 linux-4.14.y 458a534cac0c ac7ca78e .config console log report ci2-linux-4-14
2020/09/10 23:59 linux-4.14.y 458a534cac0c ac7ca78e .config console log report ci2-linux-4-14
2020/09/08 04:35 linux-4.14.y 2f166cdcf8a9 abf9ba4f .config console log report ci2-linux-4-14
2020/09/07 19:53 linux-4.14.y 2f166cdcf8a9 abf9ba4f .config console log report ci2-linux-4-14
2020/09/06 21:16 linux-4.14.y 2f166cdcf8a9 abf9ba4f .config console log report ci2-linux-4-14
2020/09/05 13:19 linux-4.14.y 2f166cdcf8a9 abf9ba4f .config console log report ci2-linux-4-14
2020/09/04 13:01 linux-4.14.y 2f166cdcf8a9 abf9ba4f .config console log report ci2-linux-4-14
2020/09/03 01:13 linux-4.14.y d7e78d08fa77 abf9ba4f .config console log report ci2-linux-4-14
2020/09/02 19:21 linux-4.14.y d7e78d08fa77 abf9ba4f .config console log report ci2-linux-4-14
2020/09/01 16:39 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/31 16:51 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/31 15:45 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/31 07:20 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/31 01:49 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/30 17:13 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/30 15:52 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/30 11:30 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/30 09:36 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/29 23:16 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/29 15:58 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/29 07:11 linux-4.14.y d7e78d08fa77 d5a3ae1f .config console log report ci2-linux-4-14
2020/08/28 10:04 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/28 07:14 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 20:38 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 15:38 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 14:15 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 12:51 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 07:25 linux-4.14.y d7e78d08fa77 816e0689 .config console log report ci2-linux-4-14
2020/08/27 05:13 linux-4.14.y d7e78d08fa77 318430cb .config console log report ci2-linux-4-14
2020/08/27 03:54 linux-4.14.y d7e78d08fa77 318430cb .config console log report ci2-linux-4-14
2020/08/26 08:46 linux-4.14.y 6a24ca2506d6 344da168 .config console log report ci2-linux-4-14
2020/08/26 07:03 linux-4.14.y 6a24ca2506d6 344da168 .config console log report ci2-linux-4-14
2020/07/22 21:12 linux-4.14.y 69b94dd6dcd1 128cd85f .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.