Re: WARNING in print_bfs_bug
From: Dmitry Vyukov <dvyukov@google.com>
Date: 2020-09-27 08:57:42
Also in:
bpf, lkml
On Thu, Oct 31, 2019 at 9:39 PM syzbot [off-list ref] wrote:
syzbot has found a reproducer for the following crash on: HEAD commit: 49afce6d Add linux-next specific files for 20191031 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11eea36ce00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f119b33031056 dashboard link: https://syzkaller.appspot.com/bug?extid=62ebe501c1ce9a91f68c compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c162f4e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131b5eb8e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+62ebe501c1ce9a91f68c@syzkaller.appspotmail.com
This is another LOCKDEP-related top crasher. syzkaller finds just this one (see below). I think we need to disable LOCKDEP temporary until this and other LOCKDEP issues are resolved. I've filed https://github.com/google/syzkaller/issues/2140 to track disabling/enabling. 2020/09/27 10:37:03 vm-12: crash: WARNING in print_bfs_bug 2020/09/27 10:37:04 VMs 33, executed 179314, corpus cover 286148, corpus signal 641880, max signal 648495, crashes 81, repro 0 2020/09/27 10:37:13 vm-19: crash: WARNING in print_bfs_bug 2020/09/27 10:37:14 VMs 34, executed 180675, corpus cover 286544, corpus signal 643551, max signal 650103, crashes 82, repro 0 2020/09/27 10:37:18 vm-0: crash: WARNING in print_bfs_bug 2020/09/27 10:37:19 vm-15: crash: WARNING in print_bfs_bug 2020/09/27 10:37:21 vm-10: crash: WARNING in print_bfs_bug 2020/09/27 10:37:23 vm-35: crash: WARNING in print_bfs_bug 2020/09/27 10:37:24 VMs 30, executed 181609, corpus cover 286707, corpus signal 644444, max signal 651199, crashes 86, repro 0 2020/09/27 10:37:27 vm-21: crash: WARNING in print_bfs_bug 2020/09/27 10:37:34 VMs 29, executed 182783, corpus cover 286926, corpus signal 645948, max signal 652593, crashes 88, repro 0 2020/09/27 10:37:44 VMs 29, executed 184015, corpus cover 287197, corpus signal 647205, max signal 653953, crashes 88, repro 0 2020/09/27 10:37:54 VMs 29, executed 185065, corpus cover 287474, corpus signal 648346, max signal 655028, crashes 88, repro 0 2020/09/27 10:38:06 VMs 30, executed 185678, corpus cover 287600, corpus signal 648876, max signal 655519, crashes 88, repro 0 2020/09/27 10:38:16 VMs 35, executed 187635, corpus cover 288154, corpus signal 652110, max signal 659120, crashes 88, repro 0 2020/09/27 10:38:19 vm-14: crash: WARNING in print_bfs_bug 2020/09/27 10:38:26 VMs 35, executed 189507, corpus cover 288492, corpus signal 654412, max signal 661260, crashes 89, repro 0 2020/09/27 10:38:36 VMs 35, executed 190825, corpus cover 288828, corpus signal 655751, max signal 662985, crashes 89, repro 0 2020/09/27 10:38:46 VMs 35, executed 191924, corpus cover 289050, corpus signal 657265, max signal 664188, crashes 89, repro 0 2020/09/27 10:38:50 vm-20: crash: WARNING in print_bfs_bug 2020/09/27 10:38:52 vm-26: crash: WARNING in print_bfs_bug 2020/09/27 10:38:53 vm-22: crash: WARNING in print_bfs_bug
------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 0 PID: 12077 at kernel/locking/lockdep.c:1696 print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12077 Comm: syz-executor941 Not tainted 5.4.0-rc5-next-20191031 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Code: 07 00 74 2d 48 c7 c7 00 5f ac 8a c6 07 00 0f 1f 40 00 85 db 75 05 5b 41 5c 5d c3 44 89 e6 48 c7 c7 60 1e ac 87 e8 fc ba eb ff <0f> 0b 5b 41 5c 5d c3 0f 0b 48 c7 c7 58 23 f3 88 e8 1f 95 56 00 eb RSP: 0018:ffff88813c747288 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815d0816 RDI: ffffed10278e8e43 RBP: ffff88813c747298 R08: ffff8880935244c0 R09: fffffbfff11f41ed R10: fffffbfff11f41ec R11: ffffffff88fa0f63 R12: 00000000ffffffff R13: ffff888093524d88 R14: ffff88813c747310 R15: 00000000000000de check_path+0x36/0x40 kernel/locking/lockdep.c:1772 check_noncircular+0x16d/0x3e0 kernel/locking/lockdep.c:1797 check_prev_add kernel/locking/lockdep.c:2476 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3955 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] igmp6_group_dropped+0x15b/0x8c0 net/ipv6/mcast.c:704 ipv6_mc_down+0x64/0xf0 net/ipv6/mcast.c:2541 ipv6_mc_destroy_dev+0x21/0x180 net/ipv6/mcast.c:2603 addrconf_ifdown+0xca2/0x1220 net/ipv6/addrconf.c:3842 addrconf_notify+0x5db/0x23b0 net/ipv6/addrconf.c:3633 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1878 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline] call_netdevice_notifiers net/core/dev.c:1919 [inline] rollback_registered_many+0x850/0x10d0 net/core/dev.c:8743 rollback_registered+0x109/0x1d0 net/core/dev.c:8788 register_netdevice+0xbac/0x1020 net/core/dev.c:9347 register_netdev+0x30/0x50 net/core/dev.c:9437 ip6gre_init_net+0x3ac/0x5f0 net/ipv6/ip6_gre.c:1582 ops_init+0xb3/0x420 net/core/net_namespace.c:137 setup_net+0x2d5/0x8b0 net/core/net_namespace.c:335 copy_net_ns+0x29e/0x520 net/core/net_namespace.c:476 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:103 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:202 ksys_unshare+0x444/0x980 kernel/fork.c:2889 __do_sys_unshare kernel/fork.c:2957 [inline] __se_sys_unshare kernel/fork.c:2955 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2955 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4439c9 Code: Bad RIP value. RSP: 002b:00007ffc2b2cd878 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004439c9 RDX: 00000000004439c9 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 0000000000000000 R08: 00000000004aaeff R09: 00000000004aaeff R10: 00000000004aaeff R11: 0000000000000246 R12: 0000000000000b5b R13: 00000000004047d0 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 12077 at kernel/locking/mutex.c:1419 mutex_trylock+0x279/0x2f0 kernel/locking/mutex.c:1427 Modules linked in: CPU: 0 PID: 12077 Comm: syz-executor941 Not tainted 5.4.0-rc5-next-20191031 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mutex_trylock+0x279/0x2f0 kernel/locking/mutex.c:1419 Code: c9 41 b8 01 00 00 00 31 c9 ba 01 00 00 00 31 f6 e8 3c b8 03 fa 58 48 8d 65 d8 b8 01 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 0c fe ff ff 48 c7 c7 a0 a1 b0 8a 48 89 4d d0 e8 f0 78 59 RSP: 0018:ffff88813c746e48 EFLAGS: 00010006 RAX: 0000000080000403 RBX: 1ffff110278e8dd1 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffffff816a6cf5 RDI: ffffffff88fc9fa0 RBP: ffff88813c746e78 R08: 0000000000000001 R09: fffffbfff11f4751 R10: fffffbfff11f4750 R11: ffffffff88fa3a83 R12: ffffffff8ab0a1a0 R13: 0000000000000000 R14: ffffffff8158bb00 R15: ffffffff88fc9fa0 FS: 00000000013d6940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000044399f CR3: 000000013c5bf000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __crash_kexec+0x91/0x200 kernel/kexec_core.c:948 panic+0x308/0x75c kernel/panic.c:241 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Code: 07 00 74 2d 48 c7 c7 00 5f ac 8a c6 07 00 0f 1f 40 00 85 db 75 05 5b 41 5c 5d c3 44 89 e6 48 c7 c7 60 1e ac 87 e8 fc ba eb ff <0f> 0b 5b 41 5c 5d c3 0f 0b 48 c7 c7 58 23 f3 88 e8 1f 95 56 00 eb RSP: 0018:ffff88813c747288 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815d0816 RDI: ffffed10278e8e43 RBP: ffff88813c747298 R08: ffff8880935244c0 R09: fffffbfff11f41ed R10: fffffbfff11f41ec R11: ffffffff88fa0f63 R12: 00000000ffffffff R13: ffff888093524d88 R14: ffff88813c747310 R15: 00000000000000de check_path+0x36/0x40 kernel/locking/lockdep.c:1772 check_noncircular+0x16d/0x3e0 kernel/locking/lockdep.c:1797 check_prev_add kernel/locking/lockdep.c:2476 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3955 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] igmp6_group_dropped+0x15b/0x8c0 net/ipv6/mcast.c:704 ipv6_mc_down+0x64/0xf0 net/ipv6/mcast.c:2541 ipv6_mc_destroy_dev+0x21/0x180 net/ipv6/mcast.c:2603 addrconf_ifdown+0xca2/0x1220 net/ipv6/addrconf.c:3842 addrconf_notify+0x5db/0x23b0 net/ipv6/addrconf.c:3633 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1878 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline] call_netdevice_notifiers net/core/dev.c:1919 [inline] rollback_registered_many+0x850/0x10d0 net/core/dev.c:8743 rollback_registered+0x109/0x1d0 net/core/dev.c:8788 register_netdevice+0xbac/0x1020 net/core/dev.c:9347 register_netdev+0x30/0x50 net/core/dev.c:9437 ip6gre_init_net+0x3ac/0x5f0 net/ipv6/ip6_gre.c:1582 ops_init+0xb3/0x420 net/core/net_namespace.c:137 setup_net+0x2d5/0x8b0 net/core/net_namespace.c:335 copy_net_ns+0x29e/0x520 net/core/net_namespace.c:476 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:103 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:202 ksys_unshare+0x444/0x980 kernel/fork.c:2889 __do_sys_unshare kernel/fork.c:2957 [inline] __se_sys_unshare kernel/fork.c:2955 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2955 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4439c9 Code: Bad RIP value. RSP: 002b:00007ffc2b2cd878 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004439c9 RDX: 00000000004439c9 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 0000000000000000 R08: 00000000004aaeff R09: 00000000004aaeff R10: 00000000004aaeff R11: 0000000000000246 R12: 0000000000000b5b R13: 00000000004047d0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 149354 hardirqs last enabled at (149353): [<ffffffff8146110a>] __local_bh_enable_ip+0x15a/0x270 kernel/softirq.c:194 hardirqs last disabled at (149351): [<ffffffff814610ca>] __local_bh_enable_ip+0x11a/0x270 kernel/softirq.c:171 softirqs last enabled at (149352): [<ffffffff864ee3d4>] ipv6_ac_destroy_dev+0x144/0x1b0 net/ipv6/anycast.c:402 softirqs last disabled at (149354): [<ffffffff865cbc13>] ipv6_mc_down+0x23/0xf0 net/ipv6/mcast.c:2538 ---[ end trace c8d5cabde4ea777a ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 12077 at kernel/locking/mutex.c:737 mutex_unlock+0x1d/0x30 kernel/locking/mutex.c:744 Modules linked in: CPU: 0 PID: 12077 Comm: syz-executor941 Tainted: G W 5.4.0-rc5-next-20191031 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mutex_unlock+0x1d/0x30 kernel/locking/mutex.c:737 Code: 4c 89 ff e8 45 84 59 fa e9 8c fb ff ff 55 65 8b 05 80 31 ac 78 a9 00 ff 1f 00 48 89 e5 75 0b 48 8b 75 08 e8 45 f9 ff ff 5d c3 <0f> 0b 48 8b 75 08 e8 38 f9 ff ff 5d c3 66 0f 1f 44 00 00 48 b8 00 RSP: 0018:ffff88813c746e78 EFLAGS: 00010006 RAX: 0000000080000403 RBX: 1ffff110278e8dd1 RCX: ffffffff816a6d0d RDX: 0000000000000000 RSI: ffffffff816a6d6f RDI: ffffffff88fc9fa0 RBP: ffff88813c746e78 R08: ffff8880935244c0 R09: 0000000000000000 R10: fffffbfff11f93f4 R11: ffffffff88fc9fa7 R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff8158bb00 R15: 00000000000006a0 FS: 00000000013d6940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000044399f CR3: 000000013c5bf000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __crash_kexec+0x10b/0x200 kernel/kexec_core.c:957 panic+0x308/0x75c kernel/panic.c:241 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:print_bfs_bug+0x5c/0x80 kernel/locking/lockdep.c:1696 Code: 07 00 74 2d 48 c7 c7 00 5f ac 8a c6 07 00 0f 1f 40 00 85 db 75 05 5b 41 5c 5d c3 44 89 e6 48 c7 c7 60 1e ac 87 e8 fc ba eb ff <0f> 0b 5b 41 5c 5d c3 0f 0b 48 c7 c7 58 23 f3 88 e8 1f 95 56 00 eb RSP: 0018:ffff88813c747288 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815d0816 RDI: ffffed10278e8e43 RBP: ffff88813c747298 R08: ffff8880935244c0 R09: fffffbfff11f41ed R10: fffffbfff11f41ec R11: ffffffff88fa0f63 R12: 00000000ffffffff R13: ffff888093524d88 R14: ffff88813c747310 R15: 00000000000000de check_path+0x36/0x40 kernel/locking/lockdep.c:1772 check_noncircular+0x16d/0x3e0 kernel/locking/lockdep.c:1797 check_prev_add kernel/locking/lockdep.c:2476 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x2596/0x4a00 kernel/locking/lockdep.c:3955 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] igmp6_group_dropped+0x15b/0x8c0 net/ipv6/mcast.c:704 ipv6_mc_down+0x64/0xf0 net/ipv6/mcast.c:2541 ipv6_mc_destroy_dev+0x21/0x180 net/ipv6/mcast.c:2603 addrconf_ifdown+0xca2/0x1220 net/ipv6/addrconf.c:3842 addrconf_notify+0x5db/0x23b0 net/ipv6/addrconf.c:3633 notifier_call_chain+0xc2/0x230 kernel/notifier.c:83 __raw_notifier_call_chain kernel/notifier.c:361 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:368 call_netdevice_notifiers_info net/core/dev.c:1893 [inline] call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:1878 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline] call_netdevice_notifiers net/core/dev.c:1919 [inline] rollback_registered_many+0x850/0x10d0 net/core/dev.c:8743 rollback_registered+0x109/0x1d0 net/core/dev.c:8788 register_netdevice+0xbac/0x1020 net/core/dev.c:9347 register_netdev+0x30/0x50 net/core/dev.c:9437 ip6gre_init_net+0x3ac/0x5f0 net/ipv6/ip6_gre.c:1582 ops_init+0xb3/0x420 net/core/net_namespace.c:137 setup_net+0x2d5/0x8b0 net/core/net_namespace.c:335 copy_net_ns+0x29e/0x520 net/core/net_namespace.c:476 create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:103 unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:202 ksys_unshare+0x444/0x980 kernel/fork.c:2889 __do_sys_unshare kernel/fork.c:2957 [inline] __se_sys_unshare kernel/fork.c:2955 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2955 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4439c9 Code: Bad RIP value. RSP: 002b:00007ffc2b2cd878 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004439c9 RDX: 00000000004439c9 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 0000000000000000 R08: 00000000004aaeff R09: 00000000004aaeff R10: 00000000004aaeff R11: 0000000000000246 R12: 0000000000000b5b R13: 00000000004047d0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 149354 hardirqs last enabled at (149353): [<ffffffff8146110a>] __local_bh_enable_ip+0x15a/0x270 kernel/softirq.c:194 hardirqs last disabled at (149351): [<ffffffff814610ca>] __local_bh_enable_ip+0x11a/0x270 kernel/softirq.c:171 softirqs last enabled at (149352): [<ffffffff864ee3d4>] ipv6_ac_destroy_dev+0x144/0x1b0 net/ipv6/anycast.c:402 softirqs last disabled at (149354): [<ffffffff865cbc13>] ipv6_mc_down+0x23/0xf0 net/ipv6/mcast.c:2538 ---[ end trace c8d5cabde4ea777b ]--- Kernel Offset: disabled Rebooting in 86400 seconds.. -- You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. 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