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general protection fault in __vxlan_dev_create

Status: upstream: reported C repro on 2020/06/23 01:33
Reported-by: syzbot+156b1f82cf1a810f216a@syzkaller.appspotmail.com
First crash: 1642d, last: 1187d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 general protection fault in __vxlan_dev_create C 238 671d 1612d 0/1 upstream: reported C repro on 2020/07/22 21:12
▶ ▼ Fix bisection attempts (14)
Created Duration User Patch Repo Result
2021/10/21 14:06 11m bisect fix linux-4.19.y error job log
2021/09/21 13:19 26m bisect fix linux-4.19.y OK (0) job log log
2021/08/22 05:26 29m bisect fix linux-4.19.y OK (0) job log log
2021/07/23 04:04 27m bisect fix linux-4.19.y OK (0) job log log
2021/06/23 03:31 22m bisect fix linux-4.19.y OK (0) job log log
2021/05/24 02:56 34m bisect fix linux-4.19.y OK (0) job log log
2021/04/23 16:25 23m bisect fix linux-4.19.y OK (0) job log log
2021/03/24 16:00 23m bisect fix linux-4.19.y OK (0) job log log
2021/02/22 15:36 23m bisect fix linux-4.19.y OK (0) job log log
2021/02/18 19:13 19m bisect fix linux-4.19.y error job log
2021/02/14 13:34 0m bisect fix linux-4.19.y error job log
2021/01/15 13:10 23m bisect fix linux-4.19.y OK (0) job log log
2020/12/16 12:45 24m bisect fix linux-4.19.y OK (0) job log log
2020/11/16 12:21 23m bisect fix linux-4.19.y OK (0) job log log

Sample crash report:
audit: type=1400 audit(1594669936.700:8): avc:  denied  { execmem } for  pid=6459 comm="syz-executor345" 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-executor345'.
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: 1 PID: 6474 Comm: syz-executor345 Not tainted 4.19.132-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 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 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84
RSP: 0018:ffff888089ff6db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff110113fedb9 RCX: ffffffff8464b02f
RDX: 1bd5a00000000040 RSI: ffffffff8464b219 RDI: ffff88808aec2188
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff88808aec2180 R14: dead000000000200 R15: ffff8880a74716c0
FS:  00007f4041d76700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559a3b8d0920 CR3: 0000000090215000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vxlan_newlink+0xc0/0x120 drivers/net/vxlan.c:3497
 rtnl_newlink+0x1027/0x15a0 net/core/rtnetlink.c:3141
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4777
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 sock_no_sendpage+0xf5/0x140 net/core/sock.c:2647
 kernel_sendpage net/socket.c:3378 [inline]
 sock_sendpage+0xdf/0x140 net/socket.c:847
 pipe_to_sendpage+0x268/0x330 fs/splice.c:452
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x389/0x800 fs/splice.c:627
 splice_from_pipe fs/splice.c:662 [inline]
 generic_splice_sendpage+0xd4/0x140 fs/splice.c:833
 do_splice_from fs/splice.c:852 [inline]
 do_splice fs/splice.c:1154 [inline]
 __do_sys_splice fs/splice.c:1428 [inline]
 __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445b59
Code: e8 bc b7 02 00 48 83 c4 18 c3 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 0f 83 ab 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4041d75d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445b59
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dac50 R08: 000000000004ffe2 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c
R13: 000000000000525a R14: 0000000000000000 R15: 0705001000000048
Modules linked in:
---[ end trace bf97bbdc364257ee ]---
RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline]
RIP: 0010:__hlist_del include/linux/list.h:679 [inline]
RIP: 0010:hlist_del_rcu include/linux/rculist.h:457 [inline]
RIP: 0010:vxlan_fdb_destroy drivers/net/vxlan.c:788 [inline]
RIP: 0010:__vxlan_dev_create+0x6cb/0xad0 drivers/net/vxlan.c:3270
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6a 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 3e 03 00 00 49 89 2e 4d 8d 7d 10 48 85 ed 0f 84
RSP: 0018:ffff888089ff6db8 EFLAGS: 00010a02
RAX: dffffc0000000000 RBX: 1ffff110113fedb9 RCX: ffffffff8464b02f
RDX: 1bd5a00000000040 RSI: ffffffff8464b219 RDI: ffff88808aec2188
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000fffffff0
R13: ffff88808aec2180 R14: dead000000000200 R15: ffff8880a74716c0
FS:  00007f4041d76700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f088b775740 CR3: 0000000090215000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (275):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/13 19:54 linux-4.19.y dce0f88600e4 f90ec899 .config console log report syz C ci2-linux-4-19
2020/10/17 12:21 linux-4.19.y ad326970d25c fea47c01 .config console log report info ci2-linux-4-19
2020/10/16 00:40 linux-4.19.y a1b977b49b66 6e262c73 .config console log report info ci2-linux-4-19
2020/10/09 10:19 linux-4.19.y a1b977b49b66 fa79ed2a .config console log report info ci2-linux-4-19
2020/10/08 03:34 linux-4.19.y a1b977b49b66 1880b4a9 .config console log report info ci2-linux-4-19
2020/10/04 23:06 linux-4.19.y b09c34517e1a 5ef9c291 .config console log report info ci2-linux-4-19
2020/10/01 06:26 linux-4.19.y 10ad6cfd5736 a9767fb2 .config console log report info ci2-linux-4-19
2020/09/29 16:07 linux-4.19.y 10ad6cfd5736 5abc3f1a .config console log report info ci2-linux-4-19
2020/09/26 23:31 linux-4.19.y 10ad6cfd5736 5dd8aee8 .config console log report info ci2-linux-4-19
2020/09/25 16:09 linux-4.19.y d09b80172c22 4a006f63 .config console log report info ci2-linux-4-19
2020/09/23 19:13 linux-4.19.y d09b80172c22 54289b08 .config console log report info ci2-linux-4-19
2020/09/23 10:49 linux-4.19.y d09b80172c22 287cd75a .config console log report info ci2-linux-4-19
2020/09/12 12:28 linux-4.19.y a87f96283793 21d289c2 .config console log report ci2-linux-4-19
2020/09/12 10:25 linux-4.19.y 67957f12548c 21d289c2 .config console log report ci2-linux-4-19
2020/09/11 16:59 linux-4.19.y 67957f12548c adfb8b4e .config console log report ci2-linux-4-19
2020/09/11 08:47 linux-4.19.y 67957f12548c ac7ca78e .config console log report ci2-linux-4-19
2020/09/11 07:20 linux-4.19.y 67957f12548c ac7ca78e .config console log report ci2-linux-4-19
2020/09/10 23:44 linux-4.19.y 67957f12548c ac7ca78e .config console log report ci2-linux-4-19
2020/09/09 07:12 linux-4.19.y c37da90efff5 0ea7a887 .config console log report ci2-linux-4-19
2020/09/09 05:10 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/09 03:28 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/09 02:27 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/09 00:36 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 12:31 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 08:41 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 06:30 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 05:55 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 04:23 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/08 02:14 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/07 23:51 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/07 12:51 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/07 04:48 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/07 03:32 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/07 02:21 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/06 09:50 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 23:39 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 20:52 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 20:16 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 15:24 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 10:42 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 09:22 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 03:18 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/05 00:17 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/04 22:55 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/03 10:18 linux-4.19.y c37da90efff5 abf9ba4f .config console log report ci2-linux-4-19
2020/09/03 08:05 linux-4.19.y f6d5cb9e2c06 abf9ba4f .config console log report ci2-linux-4-19
2020/06/23 01:32 linux-4.19.y b3a99fd385fa 1afe1535 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.