syzbot


WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl

Status: auto-closed as invalid on 2022/09/13 18:28
Subsystems: net
[Documentation on labels]
First crash: 1097d, last: 1057d
Cause bisection: introduced by (bisect log) :
commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.rutland@arm.com>
Date: Mon Jan 11 15:37:07 2021 +0000

  lockdep: report broken irq restoration

Crash: WARNING in kvm_wait (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) [no-op commit]:
commit 3f3a9bc1f6df5a1a9ec39e3a5bee420328811be4
Author: Imre Deak <imre.deak@intel.com>
Date: Wed Mar 17 18:48:59 2021 +0000

  drm/i915/ilk-glk: Fix link training on links with LTTPRs

  
Last patch testing requests (2)
Created Duration User Patch Repo Result
2022/09/13 16:27 15m retest repro net-next-old OK log
2022/09/13 13:27 16m retest repro net-next-old OK log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2021/06/05 08:59 4h24m bisect fix net-next-old job log (1)
2021/05/06 06:45 23m bisect fix net-next-old job log (0) log

Sample crash report:
=============================
WARNING: suspicious RCU usage
5.12.0-rc4-syzkaller #0 Not tainted
-----------------------------
include/net/addrconf.h:314 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor176/8401:
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: ipv6_get_msfilter+0xf8/0x220 net/ipv6/ipv6_sockglue.c:1064

stack backtrace:
CPU: 1 PID: 8401 Comm: syz-executor176 Not tainted 5.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 __in6_dev_get include/net/addrconf.h:314 [inline]
 __in6_dev_get include/net/addrconf.h:312 [inline]
 ip6_mc_find_dev_rtnl+0x1be/0x1f0 net/ipv6/mcast.c:310
 ip6_mc_msfget+0x1be/0x830 net/ipv6/mcast.c:590
 ipv6_get_msfilter+0x10c/0x220 net/ipv6/ipv6_sockglue.c:1065
 do_ipv6_getsockopt.constprop.0+0x1675/0x2660 net/ipv6/ipv6_sockglue.c:1142
 ipv6_getsockopt+0x13c/0x270 net/ipv6/ipv6_sockglue.c:1477
 udpv6_getsockopt+0x5d/0x90 net/ipv6/udp.c:1637
 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2161
 __do_sys_getsockopt net/socket.c:2176 [inline]
 __se_sys_getsockopt net/socket.c:2173 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2173
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43efc9
Code: 28 c3 e8 2a 14 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:00007fff4d87b358 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043efc9
RDX: 0000000000000030 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000402fb0 R08: 0000000020001000 R09: 0000000000400488
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000403040
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488

=============================
WARNING: suspicious RCU usage
5.12.0-rc4-syzkaller #0 Not tainted
-----------------------------
net/ipv6/mcast.c:600 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor176/8401:
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: ipv6_get_msfilter+0xf8/0x220 net/ipv6/ipv6_sockglue.c:1064

stack backtrace:
CPU: 1 PID: 8401 Comm: syz-executor176 Not tainted 5.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 ip6_mc_msfget+0x672/0x830 net/ipv6/mcast.c:600
 ipv6_get_msfilter+0x10c/0x220 net/ipv6/ipv6_sockglue.c:1065
 do_ipv6_getsockopt.constprop.0+0x1675/0x2660 net/ipv6/ipv6_sockglue.c:1142
 ipv6_getsockopt+0x13c/0x270 net/ipv6/ipv6_sockglue.c:1477
 udpv6_getsockopt+0x5d/0x90 net/ipv6/udp.c:1637
 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2161
 __do_sys_getsockopt net/socket.c:2176 [inline]
 __se_sys_getsockopt net/socket.c:2173 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2173
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43efc9
Code: 28 c3 e8 2a 14 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:00007fff4d87b358 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043efc9
RDX: 0000000000000030 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000402fb0 R08: 0000000020001000 R09: 0000000000400488
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000403040
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488

=============================
WARNING: suspicious RCU usage
5.12.0-rc4-syzkaller #0 Not tainted
-----------------------------
net/ipv6/mcast.c:610 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by syz-executor176/8401:
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1600 [inline]
 #0: ffff888021f79860 (sk_lock-AF_INET6){+.+.}-{0:0}, at: ipv6_get_msfilter+0xf8/0x220 net/ipv6/ipv6_sockglue.c:1064

stack backtrace:
CPU: 1 PID: 8401 Comm: syz-executor176 Not tainted 5.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 ip6_mc_msfget+0x6da/0x830 net/ipv6/mcast.c:610
 ipv6_get_msfilter+0x10c/0x220 net/ipv6/ipv6_sockglue.c:1065
 do_ipv6_getsockopt.constprop.0+0x1675/0x2660 net/ipv6/ipv6_sockglue.c:1142
 ipv6_getsockopt+0x13c/0x270 net/ipv6/ipv6_sockglue.c:1477
 udpv6_getsockopt+0x5d/0x90 net/ipv6/udp.c:1637
 __sys_getsockopt+0x21f/0x5f0 net/socket.c:2161
 __do_sys_getsockopt net/socket.c:2176 [inline]
 __se_sys_getsockopt net/socket.c:2173 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2173
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43efc9
Code: 28 c3 e8 2a 14 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:00007fff4d87b358 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043efc9


Crashes (150):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/03/31 04:11 net-next-old 37f368d8d09d 6a81331a .config console log report syz C ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/03/27 12:05 net-next-old a1281601f88e a8529b82 .config console log report syz C ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/06 06:45 net-next-old 514e1150da9c 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/06 05:11 net-next-old 514e1150da9c 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/06 03:24 net-next-old 514e1150da9c 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 19:16 net-next-old 514e1150da9c 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 18:00 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 14:55 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 12:56 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 10:48 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 05:09 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 23:22 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 18:21 net-next-old 7d42e84eb99d 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 17:17 net-next-old 428e68e1a85a 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 14:13 net-next-old 428e68e1a85a 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 04:27 net-next-old 428e68e1a85a 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 00:37 net-next-old 825066651792 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 23:32 net-next-old 825066651792 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 22:18 net-next-old 825066651792 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 18:57 net-next-old 825066651792 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 16:21 net-next-old 825066651792 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 14:30 net-next-old f3f409a9b7f5 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 12:51 net-next-old f3f409a9b7f5 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 11:08 net-next-old f3f409a9b7f5 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 05:08 net-next-old f3f409a9b7f5 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 01:43 net-next-old f3f409a9b7f5 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 00:20 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 13:32 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 11:07 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 10:03 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 06:06 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 03:49 net-next-old bd78980be1a6 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/01 13:09 net-next-old 917e2e6c5798 6a81331a .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/03/27 06:59 net-next-old a1281601f88e a8529b82 .config console log report info ci-upstream-net-kasan-gce WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 23:17 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 07:22 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/05 04:01 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 22:05 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/04 19:31 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 20:27 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/03 12:12 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 21:42 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 19:47 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 16:33 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 12:17 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 07:36 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/02 02:41 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/01 21:27 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/01 18:19 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/01 14:56 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
2021/04/01 14:12 linux-next 454c576c3f5e 6a81331a .config console log report info ci-upstream-linux-next-kasan-gce-root WARNING: suspicious RCU usage in ip6_mc_find_dev_rtnl
* Struck through repros no longer work on HEAD.