INFO: task hung in lru_add_drain_all_cpuslocked (2)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 987732fc ANDROID: Add a tracepoint for mapping inode to fu..
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=15cde97a600000
kernel config: https://syzkaller.appspot.com/x/.config?x=db048054ce6f3d49
dashboard link: https://syzkaller.appspot.com/bug?extid=8507c3eb23efe4b50f62
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+8507c3...@syzkaller.appspotmail.com

ip6_tunnel: 6 xmit: Local address not yet configured!
ip6_tunnel: w xmit: Local address not yet configured!
ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
ip6_tunnel: Q xmit: Local address not yet configured!
ip6_tunnel: 8 xmit: Local address not yet configured!
INFO: task syz-executor.0:31685 blocked for more than 140 seconds.
ip6_tunnel: ^ xmit: Local address not yet configured!
Not tainted 4.14.140+ #39
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D27760 31685 5199 0x00000004
Call Trace:
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_timeout+0x752/0xe90 kernel/time/timer.c:1721
do_wait_for_common kernel/sched/completion.c:91 [inline]
__wait_for_common kernel/sched/completion.c:112 [inline]
wait_for_common+0x29c/0x470 kernel/sched/completion.c:123
flush_work+0x3e2/0x720 kernel/workqueue.c:2908
lru_add_drain_all_cpuslocked mm/swap.c:722 [inline]
lru_add_drain_all_cpuslocked+0x2d5/0x420 mm/swap.c:691
lru_add_drain_all+0xf/0x20 mm/swap.c:730
do_mlock+0x90/0x5d0 mm/mlock.c:673
SYSC_mlock2 mm/mlock.c:726 [inline]
SyS_mlock2+0x49/0x70 mm/mlock.c:716
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f6fd299cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000145
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020000000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6fd299d6d4
R13: 00000000004c5d6b R14: 00000000004da7e0 R15: 00000000ffffffff
INFO: task syz-executor.0:31706 blocked for more than 140 seconds.
Not tainted 4.14.140+ #39
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D29712 31706 5199 0x00000004
Call Trace:
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
lru_add_drain_all+0xf/0x20 mm/swap.c:730
do_mlock+0x90/0x5d0 mm/mlock.c:673
SYSC_mlock2 mm/mlock.c:726 [inline]
SyS_mlock2+0x49/0x70 mm/mlock.c:716
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f6fd295ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000145
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020000000
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6fd295b6d4
R13: 00000000004c5d6b R14: 00000000004da7e0 R15: 00000000ffffffff
INFO: task syz-executor.1:31720 blocked for more than 140 seconds.
Not tainted 4.14.140+ #39
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D30568 31720 1850 0x00000004
Call Trace:
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
lru_add_drain_all+0xf/0x20 mm/swap.c:730
SYSC_mlockall mm/mlock.c:802 [inline]
SyS_mlockall+0x1e1/0x520 mm/mlock.c:790
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f252f2aac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f252f2ab6d4
R13: 00000000004c5d72 R14: 00000000004da7f8 R15: 00000000ffffffff
INFO: task syz-executor.1:31723 blocked for more than 140 seconds.
Not tainted 4.14.140+ #39
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D27712 31723 1850 0x00000004
Call Trace:
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
lru_add_drain_all+0xf/0x20 mm/swap.c:730
SYSC_mlockall mm/mlock.c:802 [inline]
SyS_mlockall+0x1e1/0x520 mm/mlock.c:790
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459879
RSP: 002b:00007f252f289c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000459879
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f252f28a6d4
R13: 00000000004c5d72 R14: 00000000004da7f8 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/23:
#0: (tasklist_lock){.+.+}, at: [<000000006a1702af>]
debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
3 locks held by kworker/1:1/65:
#0: ("%s"("ipv6_addrconf")){+.+.}, at: [<00000000266b48ef>]
process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105
#1: ((addr_chk_work).work){+.+.}, at: [<000000003b09e38c>]
process_one_work+0x735/0x1580 kernel/workqueue.c:2109
#2: (rtnl_mutex){+.+.}, at: [<0000000066b262bd>]
addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431
2 locks held by getty/1754:
#0: (&tty->ldisc_sem){++++}, at: [<00000000323c7d5e>]
tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<0000000054e86581>]
n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.1/4616:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rtnl_mutex){+.+.}, at: [<000000005f853a73>] raw_close+0xe/0x30
net/ipv4/raw.c:699
2 locks held by syz-executor.1/4659:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rtnl_mutex){+.+.}, at: [<000000005f853a73>] raw_close+0xe/0x30
net/ipv4/raw.c:699
1 lock held by syz-executor.1/10552:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
1 lock held by syz-executor.1/18640:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
3 locks held by kworker/1:5/25408:
#0: ("events"){+.+.}, at: [<00000000266b48ef>]
process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105
#1: ((linkwatch_work).work){+.+.}, at: [<000000003b09e38c>]
process_one_work+0x735/0x1580 kernel/workqueue.c:2109
#2: (rtnl_mutex){+.+.}, at: [<00000000ae7de0af>] linkwatch_event+0xa/0x50
net/core/link_watch.c:236
1 lock held by syz-executor.1/28502:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
2 locks held by syz-executor.1/29184:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rtnl_mutex){+.+.}, at: [<000000005f853a73>] raw_close+0xe/0x30
net/ipv4/raw.c:699
2 locks held by kworker/u4:4/30416:
#0: ("events_unbound"){+.+.}, at: [<00000000266b48ef>]
process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105
#1: (connector_reaper_work){+.+.}, at: [<000000003b09e38c>]
process_one_work+0x735/0x1580 kernel/workqueue.c:2109
1 lock held by syz-executor.1/400:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
1 lock held by syz-executor.1/437:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
2 locks held by syz-executor.0/8645:
#0: (rtnl_mutex){+.+.}, at: [<000000009eba00ec>] tun_detach
drivers/net/tun.c:585 [inline]
#0: (rtnl_mutex){+.+.}, at: [<000000009eba00ec>] tun_chr_close+0x34/0x60
drivers/net/tun.c:2654
#1: (rcu_preempt_state.exp_mutex){+.+.}, at: [<00000000ac9b533c>]
exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline]
#1: (rcu_preempt_state.exp_mutex){+.+.}, at: [<00000000ac9b533c>]
_synchronize_rcu_expedited+0x377/0x840 kernel/rcu/tree_exp.h:596
1 lock held by syz-executor.1/9025:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
1 lock held by syz-executor.1/12933:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
1 lock held by syz-executor.1/12935:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
2 locks held by syz-executor.0/15048:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rtnl_mutex){+.+.}, at: [<000000005f853a73>] raw_close+0xe/0x30
net/ipv4/raw.c:699
1 lock held by syz-executor.0/15178:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
2 locks held by syz-executor.0/19373:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rcu_preempt_state.exp_mutex){+.+.}, at: [<00000000ac9b533c>]
exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline]
#1: (rcu_preempt_state.exp_mutex){+.+.}, at: [<00000000ac9b533c>]
_synchronize_rcu_expedited+0x377/0x840 kernel/rcu/tree_exp.h:596
1 lock held by syz-executor.1/19450:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
1 lock held by syz-executor.1/19456:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
2 locks held by kworker/u4:37/21634:
#0: ("events_unbound"){+.+.}, at: [<00000000266b48ef>]
process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105
#1: ((reaper_work).work){+.+.}, at: [<000000003b09e38c>]
process_one_work+0x735/0x1580 kernel/workqueue.c:2109
2 locks held by syz-executor.0/31252:
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
inode_lock include/linux/fs.h:718 [inline]
#0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [<00000000c9aa822a>]
__sock_release+0x86/0x2c0 net/socket.c:601
#1: (rtnl_mutex){+.+.}, at: [<000000005f853a73>] raw_close+0xe/0x30
net/ipv4/raw.c:699
2 locks held by syz-executor.0/31685:
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
get_online_cpus include/linux/cpu.h:140 [inline]
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
lru_add_drain_all+0xa/0x20 mm/swap.c:729
#1: (lock#4){+.+.}, at: [<00000000488ad7cd>]
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
2 locks held by syz-executor.0/31706:
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
get_online_cpus include/linux/cpu.h:140 [inline]
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
lru_add_drain_all+0xa/0x20 mm/swap.c:729
#1: (lock#4){+.+.}, at: [<00000000488ad7cd>]
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
2 locks held by syz-executor.1/31720:
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
get_online_cpus include/linux/cpu.h:140 [inline]
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
lru_add_drain_all+0xa/0x20 mm/swap.c:729
#1: (lock#4){+.+.}, at: [<00000000488ad7cd>]
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704
2 locks held by syz-executor.1/31723:
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
get_online_cpus include/linux/cpu.h:140 [inline]
#0: (cpu_hotplug_lock.rw_sem){++++}, at: [<000000004daaa149>]
lru_add_drain_all+0xa/0x20 mm/swap.c:729
#1: (lock#4){+.+.}, at: [<00000000488ad7cd>]
lru_add_drain_all_cpuslocked+0x6c/0x420 mm/swap.c:704

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.140+ #39
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0xca/0x134 lib/dump_stack.c:53
nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x629/0xbe0 kernel/hung_task.c:274
kthread+0x31f/0x430 kernel/kthread.c:232
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1624 Comm: rs:main Q:Reg Not tainted 4.14.140+ #39
task: 000000001697a225 task.stack: 000000008403222a
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__need_fs_reclaim+0x8b/0x100 mm/page_alloc.c:3554
RSP: 0018:ffff8881d026f2c8 EFLAGS: 00000206
RAX: 0000000001408040 RBX: 0000000001408040 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000001408040 RDI: ffff8881d0a0af24
RBP: ffff8881d0a0af00 R08: 0000000000007190 R09: ffffed103ae844fa
R10: ffffed103ae844f9 R11: ffff8881d74227cf R12: 0000000001408040
R13: 0000000000000090 R14: ffffffff8e50eec7 R15: ffff8881cab5c8d8
FS: 00007f860322b700(0000) GS:ffff8881d7400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000256c290 CR3: 00000001d1628006 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
fs_reclaim_acquire+0x5/0x10 mm/page_alloc.c:3569
slab_pre_alloc_hook mm/slab.h:417 [inline]
slab_alloc_node mm/slub.c:2684 [inline]
slab_alloc mm/slub.c:2766 [inline]
__kmalloc+0x48/0x360 mm/slub.c:3800
kmalloc include/linux/slab.h:493 [inline]
kzalloc include/linux/slab.h:661 [inline]
ext4_find_extent+0x717/0x980 fs/ext4/extents.c:900
ext4_ext_map_blocks+0x1f9/0x4a40 fs/ext4/extents.c:4311
ext4_map_blocks+0x7f4/0x1600 fs/ext4/inode.c:636
mpage_map_one_extent fs/ext4/inode.c:2467 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2520 [inline]
ext4_writepages+0x16ed/0x30a0 fs/ext4/inode.c:2891
do_writepages+0xe5/0x280 mm/page-writeback.c:2348
__filemap_fdatawrite_range+0x1a4/0x290 mm/filemap.c:347
file_write_and_wait_range+0x84/0x100 mm/filemap.c:677
__generic_file_fsync+0x70/0x190 fs/libfs.c:977
ext4_sync_file+0x3ac/0x1250 fs/ext4/fsync.c:120
vfs_fsync_range+0x106/0x260 fs/sync.c:196
generic_write_sync include/linux/fs.h:2699 [inline]
ext4_file_write_iter+0x883/0xdb0 fs/ext4/file.c:279
call_write_iter include/linux/fs.h:1788 [inline]
new_sync_write fs/read_write.c:471 [inline]
__vfs_write+0x401/0x5a0 fs/read_write.c:484
vfs_write+0x17f/0x4d0 fs/read_write.c:546
SYSC_write fs/read_write.c:594 [inline]
SyS_write+0x102/0x250 fs/read_write.c:586
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f8604c8919d
RSP: 002b:00007f8603229f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000400 RCX: 00007f8604c8919d
RDX: 0000000000000400 RSI: 00000000024a1340 RDI: 0000000000000002
RBP: 00000000024a1340 R08: 302038312079614d R09: 2039303a32343a33
R10: 656c6c616b7a7973 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f860322a410 R14: 00000000024d5ac0 R15: 00000000024a1140
Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75
75 89 d8 24 7f f6 45 26 04 0f 45 d8 f7 c3 00 00 40 00 74 4e <65> 48 8b 2c
25 c0 de 01 00 48 8d 7d 24 48 b8 00 00 00 00 00 fc


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.