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INFO: rcu detected stall in sys_open

Status: auto-closed as invalid on 2020/01/09 20:01
Reported-by: syzbot+2c4e3f44f31a2edf3912@syzkaller.appspotmail.com
First crash: 1689d, last: 1689d
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_open fs 1 1802d 1802d 0/26 auto-closed as invalid on 2019/10/25 09:11
upstream INFO: rcu detected stall in sys_open (3) fs C inconclusive 5 839d 1075d 0/26 closed as invalid on 2022/02/08 10:35
upstream INFO: rcu detected stall in sys_open (4) ext4 1 732d 732d 0/26 auto-closed as invalid on 2022/06/24 20:08
upstream INFO: rcu detected stall in sys_open (2) crypto C done done 42 1263d 1614d 15/26 fixed on 2020/12/23 11:40

Sample crash report:
audit: type=1400 audit(1568232004.995:8736): avc:  denied  { map } for  pid=24241 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
audit: type=1400 audit(1568232005.025:8737): avc:  denied  { map } for  pid=24241 comm="blkid" path="/sbin/blkid" dev="sda1" ino=16128 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
rcu: INFO: rcu_bh detected stalls on CPUs/tasks:
rcu: 	0-....: (13029 ticks this GP) idle=ea6/1/0x4000000000000002 softirq=108826/111839 fqs=5231 
rcu: 	(detected by 1, t=10502 jiffies, g=-35, q=24)
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.576 msecs
NMI backtrace for cpu 0
CPU: 0 PID: 23981 Comm: ps Not tainted 4.19.72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hhf_dequeue+0x93/0xa00 net/sched/sch_hhf.c:433
Code: 49 89 f6 48 39 c6 0f 84 71 04 00 00 e8 e6 dd dc fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 52 07 00 00 49 8b 1e 48 8d 7b 10 <48> 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 74 08 3c 03 0f 8e 4e 07
RSP: 0018:ffff8880ae8074d8 EFLAGS: 00000246
RAX: 1ffff1101229758a RBX: ffff8880914babb8 RCX: ffffffff858e7e8e
RDX: 0000000000000100 RSI: ffffffff858e78aa RDI: ffff8880914babc8
RBP: ffff8880ae807528 R08: ffff88806c478700 R09: 0000000000000007
R10: ffff88806c479098 R11: 00000000126d335b R12: dffffc0000000000
R13: ffff8880914ba900 R14: ffff8880914bac50 R15: ffff8880914bac50
FS:  00007f751dc76700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000aa2300 CR3: 000000008514e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
Code: 48 c7 c0 08 46 72 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 4a 56 7e 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9c 42 55 fa 65 8b 05 f5 fd 0d 79
RSP: 0018:ffff888041e1f6b8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48c1 RBX: 0000000000000293 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffff88806c478fa8 RDI: 0000000000000293
RBP: ffff888041e1f6c8 R08: ffff88806c478700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a456750
R13: ffffffff8a456750 R14: 0000000000000003 R15: ffffffff8a45a308
 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline]
 avc_reclaim_node security/selinux/avc.c:562 [inline]
 avc_alloc_node+0x44e/0x630 security/selinux/avc.c:581
 avc_insert security/selinux/avc.c:696 [inline]
 avc_compute_av+0x22d/0x690 security/selinux/avc.c:1026
 avc_has_perm_noaudit+0x324/0x570 security/selinux/avc.c:1167
 selinux_inode_permission+0x431/0x6b0 security/selinux/hooks.c:3223
 security_inode_permission+0xb5/0x100 security/security.c:708
 inode_permission+0x122/0x560 fs/namei.c:459
 may_lookup fs/namei.c:1696 [inline]
 link_path_walk.part.0+0x1c0/0x1330 fs/namei.c:2084
 link_path_walk fs/namei.c:2072 [inline]
 path_openat+0x1f9/0x45e0 fs/namei.c:3533
 do_filp_open+0x1a1/0x280 fs/namei.c:3564
 do_sys_open+0x3fe/0x550 fs/open.c:1088
 __do_sys_open fs/open.c:1106 [inline]
 __se_sys_open fs/open.c:1101 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1101
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f751d57d120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffd6c526808 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f751d57d120
RDX: 00007ffd6c526842 RSI: 0000000000000000 RDI: 00007ffd6c526830
RBP: 0000000000020000 R08: 0000000000000000 R09: 00007f751d84555f
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000c64220
R13: 0000000000000020 R14: 00007f751dc32010 R15: 0000000000000000
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=ea6/1/0x4000000000000002 softirq=111812/111839 fqs=5230 
rcu: 	(detected by 1, t=10502 jiffies, g=137385, q=48280)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23981 Comm: ps Not tainted 4.19.72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hhf_dequeue+0x537/0xa00 net/sched/sch_hhf.c:435
Code: ff ff 45 31 ff e9 b0 02 00 00 e8 44 d9 dc fb 48 8d 43 f0 41 be 01 00 00 00 49 8d 95 80 02 00 00 48 39 c2 74 34 e8 29 d9 dc fb <49> 8d bd 6c 03 00 00 48 89 f8 48 c1 e8 03 42 0f b6 14 20 48 89 f8
RSP: 0018:ffff8880ae8074d8 EFLAGS: 00000206
RAX: ffff88806c478700 RBX: ffff8880914babb8 RCX: ffffffff858e78e9
RDX: 0000000000000100 RSI: ffffffff858e7d67 RDI: 0000000000000005
RBP: ffff8880ae807528 R08: ffff88806c478700 R09: 0000000000000007
R10: ffff88806c479098 R11: 00000000126d335b R12: dffffc0000000000
R13: ffff8880914ba900 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f751dc76700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000aa2300 CR3: 000000008514e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
Code: 48 c7 c0 08 46 72 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 4a 56 7e 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9c 42 55 fa 65 8b 05 f5 fd 0d 79
RSP: 0018:ffff888041e1f6b8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48c1 RBX: 0000000000000293 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffff88806c478fa8 RDI: 0000000000000293
RBP: ffff888041e1f6c8 R08: ffff88806c478700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a456750
R13: ffffffff8a456750 R14: 0000000000000003 R15: ffffffff8a45a308
 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline]
 avc_reclaim_node security/selinux/avc.c:562 [inline]
 avc_alloc_node+0x44e/0x630 security/selinux/avc.c:581
 avc_insert security/selinux/avc.c:696 [inline]
 avc_compute_av+0x22d/0x690 security/selinux/avc.c:1026
 avc_has_perm_noaudit+0x324/0x570 security/selinux/avc.c:1167
 selinux_inode_permission+0x431/0x6b0 security/selinux/hooks.c:3223
 security_inode_permission+0xb5/0x100 security/security.c:708
 inode_permission+0x122/0x560 fs/namei.c:459
 may_lookup fs/namei.c:1696 [inline]
 link_path_walk.part.0+0x1c0/0x1330 fs/namei.c:2084
 link_path_walk fs/namei.c:2072 [inline]
 path_openat+0x1f9/0x45e0 fs/namei.c:3533
 do_filp_open+0x1a1/0x280 fs/namei.c:3564
 do_sys_open+0x3fe/0x550 fs/open.c:1088
 __do_sys_open fs/open.c:1106 [inline]
 __se_sys_open fs/open.c:1101 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1101
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f751d57d120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffd6c526808 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f751d57d120
RDX: 00007ffd6c526842 RSI: 0000000000000000 RDI: 00007ffd6c526830
RBP: 0000000000020000 R08: 0000000000000000 R09: 00007f751d84555f
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000c64220
R13: 0000000000000020 R14: 00007f751dc32010 R15: 0000000000000000
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu: 	0-....: (10706 ticks this GP) idle=ea6/1/0x4000000000000002 softirq=111742/111839 fqs=5199 
rcu: 	(detected by 1, t=10502 jiffies, g=6185, q=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23981 Comm: ps Not tainted 4.19.72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x15/0x20 kernel/kcov.c:174
Code: 00 48 89 e5 48 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 <e8> f6 fe ff ff 5d c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 00
RSP: 0018:ffff8880ae8074c8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8880914babb8 RCX: ffffffff858e7de6
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff8880ae8074c8 R08: ffff88806c478700 R09: 0000000000000007
R10: ffff88806c479098 R11: 00000000126d335b R12: dffffc0000000000
R13: ffff8880914ba900 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f751dc76700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000aa2300 CR3: 000000008514e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __list_del_entry include/linux/list.h:117 [inline]
 list_move_tail include/linux/list.h:182 [inline]
 hhf_dequeue+0x5b6/0xa00 net/sched/sch_hhf.c:438
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
Code: 48 c7 c0 08 46 72 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 4a 56 7e 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9c 42 55 fa 65 8b 05 f5 fd 0d 79
RSP: 0018:ffff888041e1f6b8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff10e48c1 RBX: 0000000000000293 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffff88806c478fa8 RDI: 0000000000000293
RBP: ffff888041e1f6c8 R08: ffff88806c478700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8a456750
R13: ffffffff8a456750 R14: 0000000000000003 R15: ffffffff8a45a308
 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline]
 avc_reclaim_node security/selinux/avc.c:562 [inline]
 avc_alloc_node+0x44e/0x630 security/selinux/avc.c:581
 avc_insert security/selinux/avc.c:696 [inline]
 avc_compute_av+0x22d/0x690 security/selinux/avc.c:1026
 avc_has_perm_noaudit+0x324/0x570 security/selinux/avc.c:1167
 selinux_inode_permission+0x431/0x6b0 security/selinux/hooks.c:3223
 security_inode_permission+0xb5/0x100 security/security.c:708
 inode_permission+0x122/0x560 fs/namei.c:459
 may_lookup fs/namei.c:1696 [inline]
 link_path_walk.part.0+0x1c0/0x1330 fs/namei.c:2084
 link_path_walk fs/namei.c:2072 [inline]
 path_openat+0x1f9/0x45e0 fs/namei.c:3533
 do_filp_open+0x1a1/0x280 fs/namei.c:3564
 do_sys_open+0x3fe/0x550 fs/open.c:1088
 __do_sys_open fs/open.c:1106 [inline]
 __se_sys_open fs/open.c:1101 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1101
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f751d57d120
Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
RSP: 002b:00007ffd6c526808 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000616760 RCX: 00007f751d57d120
RDX: 00007ffd6c526842 RSI: 0000000000000000 RDI: 00007ffd6c526830
RBP: 0000000000020000 R08: 0000000000000000 R09: 00007f751d84555f
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000c64220
R13: 0000000000000020 R14: 00007f751dc32010 R15: 0000000000000000

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/11 20:00 linux-4.19.y ee809c7e0895 f4e53c10 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.