[v5.15] INFO: rcu detected stall in sys_exit_group
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syzbot
Jun 28, 2023, 5:31:01 PM6/28/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 4af60700a60c Linux 5.15.119
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1201c98f280000
kernel config: https://syzkaller.appspot.com/x/.config?x=ba2032bf87adc4c7
dashboard link: https://syzkaller.appspot.com/bug?extid=ab2f9dc6bf0056af2a50
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5a37f09fce32/disk-4af60700.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/28ef8a07cc8f/vmlinux-4af60700.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ff6087a74939/bzImage-4af60700.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ab2f9d...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 ticks this GP) idle=b3d/1/0x4000000000000000 softirq=141482/141482 fqs=0
(t=29643 jiffies g=207277 q=207)
rcu: rcu_preempt kthread timer wakeup didn't happen for 29642 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=137716
rcu: rcu_preempt kthread starved for 29643 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:26936 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0xf21/0x1770 kernel/rcu/tree.c:2606
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:237 [inline]
tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline]
RIP: 0010:check_stack_usage kernel/exit.c:757 [inline]
RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915
Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39
RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216
RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80
RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448
RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450
do_group_exit+0x144/0x310 kernel/exit.c:994
__do_sys_exit_group kernel/exit.c:1005 [inline]
__se_sys_exit_group kernel/exit.c:1003 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f581ca30389
Code: Unable to access opcode bytes at RIP 0x7f581ca3035f.
RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389
RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0
</TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0xf26/0x1770 kernel/rcu/tree.c:2606
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:237 [inline]
tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline]
RIP: 0010:check_stack_usage kernel/exit.c:757 [inline]
RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915
Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39
RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216
RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80
RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448
RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450
do_group_exit+0x144/0x310 kernel/exit.c:994
__do_sys_exit_group kernel/exit.c:1005 [inline]
__se_sys_exit_group kernel/exit.c:1003 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f581ca30389
Code: Unable to access opcode bytes at RIP 0x7f581ca3035f.
RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389
RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 4af60700a60c Linux 5.15.119
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1201c98f280000
kernel config: https://syzkaller.appspot.com/x/.config?x=ba2032bf87adc4c7
dashboard link: https://syzkaller.appspot.com/bug?extid=ab2f9dc6bf0056af2a50
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5a37f09fce32/disk-4af60700.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/28ef8a07cc8f/vmlinux-4af60700.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ff6087a74939/bzImage-4af60700.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ab2f9d...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 ticks this GP) idle=b3d/1/0x4000000000000000 softirq=141482/141482 fqs=0
(t=29643 jiffies g=207277 q=207)
rcu: rcu_preempt kthread timer wakeup didn't happen for 29642 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=137716
rcu: rcu_preempt kthread starved for 29643 jiffies! g207277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:26936 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0xf21/0x1770 kernel/rcu/tree.c:2606
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:237 [inline]
tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline]
RIP: 0010:check_stack_usage kernel/exit.c:757 [inline]
RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915
Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39
RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216
RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80
RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448
RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450
do_group_exit+0x144/0x310 kernel/exit.c:994
__do_sys_exit_group kernel/exit.c:1005 [inline]
__se_sys_exit_group kernel/exit.c:1003 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f581ca30389
Code: Unable to access opcode bytes at RIP 0x7f581ca3035f.
RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389
RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0
</TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 2338 Comm: syz-executor.4 Not tainted 5.15.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3911 [inline]
rcu_sched_clock_irq+0xf26/0x1770 kernel/rcu/tree.c:2606
update_process_times+0x196/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:237 [inline]
tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:stack_not_used include/linux/sched/task_stack.h:105 [inline]
RIP: 0010:check_stack_usage kernel/exit.c:757 [inline]
RIP: 0010:do_exit+0x1a05/0x2480 kernel/exit.c:915
Code: f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 ab b8 7c 00 4a 83 3c 3b 00 75 0b e8 0f 4d 33 00 49 83 c7 08 <eb> ce 44 8b 35 02 48 2f 0b 4c 89 ff 4c 89 f6 e8 d7 4e 33 00 4d 39
RSP: 0018:ffffc900046b7d80 EFLAGS: 00000216
RAX: ffffffff814cb391 RBX: ffffc900046b0000 RCX: ffff88803fb53b80
RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc900046b6448
RBP: ffffc900046b7ec0 R08: ffffffff81559de1 R09: ffffed10035d2541
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff11007f6a81b R14: ffff88801b299380 R15: 0000000000006450
do_group_exit+0x144/0x310 kernel/exit.c:994
__do_sys_exit_group kernel/exit.c:1005 [inline]
__se_sys_exit_group kernel/exit.c:1003 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f581ca30389
Code: Unable to access opcode bytes at RIP 0x7f581ca3035f.
RSP: 002b:00007ffcb6b872c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f581ca30389
RDX: 00007f581c9e212b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00007f581c5a4000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffcb6b873b0
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Oct 6, 2023, 5:30:39 PM10/6/23
to syzkaller...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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