syzbot


INFO: task hung in tun_chr_close

Status: closed as dup on 2018/02/16 08:24
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+06cc4590ce78d7611ef8@syzkaller.appspotmail.com
First crash: 2347d, last: 1765d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
INFO: task hung in netdev_run_todo net 12 1796d 2351d
Discussions (1)
Title Replies (including bot) Last reply
INFO: task hung in tun_chr_close 1 (2) 2018/02/16 08:23
Similar bugs (12)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in tun_chr_close 32 16d 125d 0/3 upstream: reported on 2024/03/18 08:54
linux-4.19 INFO: task hung in tun_chr_close 1 1439d 1439d 0/1 auto-closed as invalid on 2020/12/09 18:55
upstream INFO: task hung in tun_chr_close (4) net syz unreliable error 14 981d 1041d 0/27 auto-closed as invalid on 2022/09/18 21:51
linux-4.19 INFO: task hung in tun_chr_close (3) 1 716d 716d 0/1 auto-obsoleted due to no activity on 2022/12/03 04:48
linux-6.1 INFO: task hung in tun_chr_close 30 28d 61d 0/3 upstream: reported on 2024/05/21 01:17
upstream INFO: task hung in rtnetlink_rcv_msg net C inconclusive inconclusive 1970 12d 1975d 27/27 fixed on 2024/07/09 19:14
android-49 INFO: task hung in tun_chr_close 1 2261d 2261d 0/3 auto-closed as invalid on 2019/02/22 14:33
linux-4.19 INFO: task hung in tun_chr_close (4) 3 522d 550d 0/1 upstream: reported on 2023/01/18 07:05
linux-4.19 INFO: task hung in tun_chr_close (2) 6 929d 1022d 0/1 auto-closed as invalid on 2022/05/04 09:03
upstream INFO: task hung in tun_chr_close (3) net 1 1152d 1152d 0/27 auto-closed as invalid on 2021/08/23 13:06
android-44 INFO: task hung in tun_chr_close 1 2271d 2271d 0/2 auto-closed as invalid on 2019/02/22 15:23
upstream INFO: task hung in tun_chr_close (2) net 7 1261d 1482d 0/27 auto-closed as invalid on 2021/05/17 11:47

Sample crash report:
INFO: task syz-executor.3:24714 blocked for more than 143 seconds.
      Not tainted 5.3.0+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28168 24714   5554 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x76e/0x17d0 kernel/sched/core.c:4056
 schedule+0xd9/0x260 kernel/sched/core.c:4123
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4182
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
 tun_detach drivers/net/tun.c:737 [inline]
 tun_chr_close+0x3f/0x180 drivers/net/tun.c:3448
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x316/0x380 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x65f/0x760 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4136f1
Code: 0f 85 6d fc ff ff 83 7c 24 0c 00 0f 84 e7 fc ff ff c7 05 9e 9f 24 00 01 00 00 00 e9 d8 fc ff ff 90 90 90 90 90 90 90 90 90 c7 <07> 01 00 00 00 31 c0 c3 0f 1f 80 00 00 00 00 c7 07 00 00 00 00 31
RSP: 002b:00007fff422a38f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00000000004136f1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: 0000000000000001 R08: ffffffff813409ba R09: 0000000000f18713
R10: 00007fff422a39d0 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 0000000000762498 R15: 000000000075bf2c

Showing all locks held in the system:
1 lock held by khungtaskd/1063:
 #0: ffffffff88fab280 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337
3 locks held by kworker/0:2/2605:
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2240
 #1: ffff8880a1fc7dc0 ((linkwatch_work).work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2244
 #2: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by rsyslogd/8966:
 #0: ffff8880a9778ba0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/9087:
 #0: ffff88808f3f8550 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f552e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9088:
 #0: ffff8880a8f13290 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f592e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9089:
 #0: ffff888090c77490 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f4d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9090:
 #0: ffff888096f42e10 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f652e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9091:
 #0: ffff888096f43690 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f5d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9092:
 #0: ffff888095f7f6d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f612e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
2 locks held by getty/9093:
 #0: ffff888091b14b10 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
 #1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156
3 locks held by kworker/0:5/9199:
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2240
 #1: ffff88809020fdc0 (deferred_process_work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2244
 #2: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
3 locks held by kworker/1:2/2414:
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8880aa4356a8 ((wq_completion)events_power_efficient){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2240
 #1: ffff88808dac7dc0 ((reg_check_chans).work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2244
 #2: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
3 locks held by kworker/1:4/5801:
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff8880aa4278e8 ((wq_completion)events){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2240
 #1: ffff888068337dc0 (reg_work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2244
 #2: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by syz-executor.1/24720:
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by syz-executor.3/24714:
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
1 lock held by syz-executor.4/24716:
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
2 locks held by syz-executor.0/24723:
1 lock held by syz-executor.2/25228:
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:5220
1 lock held by syz-executor.5/25229:
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 net/core/rtnetlink.c:5220
3 locks held by kworker/1:5/25440:
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_data kernel/workqueue.c:620 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:647 [inline]
 #0: ffff88809cdf9e28 ((wq_completion)ipv6_addrconf){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2240
 #1: ffff8880505ffdc0 ((addr_chk_work).work){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2244
 #2: ffffffff8999f9e0 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72

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

NMI backtrace for cpu 1
CPU: 1 PID: 1063 Comm: khungtaskd Not tainted 5.3.0+ #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
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0x9d0/0xef0 kernel/hung_task.c:289
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.573 msecs
NMI backtrace for cpu 0
CPU: 0 PID: 24723 Comm: syz-executor.0 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mark_usage kernel/locking/lockdep.c:3592 [inline]
RIP: 0010:__lock_acquire+0x533/0x4e70 kernel/locking/lockdep.c:3909
Code: 08 00 00 ba 07 00 00 00 45 85 c9 0f 85 d7 0e 00 00 4c 89 d6 4c 89 df ba 08 00 00 00 4c 89 95 40 ff ff ff 4c 89 9d 48 ff ff ff <e8> b8 e7 ff ff 4c 8b 9d 48 ff ff ff 85 c0 4c 8b 95 40 ff ff ff 0f
RSP: 0018:ffff8880ae809988 EFLAGS: 00000002
RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000008 RSI: ffff888098e42b80 RDI: ffff888098e422c0
RBP: ffff8880ae809a98 R08: 1ffffffff14ef92c R09: fffffbfff14ef92d
R10: ffff888098e42b80 R11: ffff888098e422c0 R12: 0000000000000037
R13: ffff888098e42ba2 R14: 0000000000000040 R15: 0000000000000000
FS:  00007f2baeac2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 0000000087e21000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487
 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get+0xd2/0x2f0 kernel/time/timekeeping.c:757
 hrtimer_forward_now include/linux/hrtimer.h:499 [inline]
 perf_swevent_hrtimer+0x31f/0x3e0 kernel/events/core.c:9554
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:check_memory_region+0x21/0x1a0 mm/kasan/generic.c:191
Code: 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 34 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 <53> 0f 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00
RSP: 0018:ffff8880a8e96bb0 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13
RAX: ffff7fffffffffff RBX: 000000000000eaf4 RCX: ffffffff8159ae47
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff88e64fe8
RBP: ffff8880a8e96bc0 R08: 0000000000000002 R09: ffff888098e42b50
R10: fffffbfff138d4a0 R11: ffffffff89c6a507 R12: ffffffff88e64fe8
R13: ffffffff88e64fe8 R14: 0000000000000001 R15: dffffc0000000000
 __kasan_check_read+0x11/0x20 mm/kasan/common.c:92
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 queued_spin_is_locked include/asm-generic/qspinlock.h:26 [inline]
 debug_spin_unlock kernel/locking/spinlock_debug.c:98 [inline]
 do_raw_spin_unlock+0x57/0x270 kernel/locking/spinlock_debug.c:138
 __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock+0x23/0x50 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:378 [inline]
 get_next_corpse net/netfilter/nf_conntrack_core.c:2012 [inline]
 nf_ct_iterate_cleanup+0x201/0x4e0 net/netfilter/nf_conntrack_core.c:2036
 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2121 [inline]
 nf_ct_iterate_cleanup_net+0x133/0x190 net/netfilter/nf_conntrack_core.c:2106
 masq_device_event+0xb5/0xe0 net/netfilter/nf_nat_masquerade.c:88
 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95
 __raw_notifier_call_chain kernel/notifier.c:396 [inline]
 raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1749
 call_netdevice_notifiers_extack net/core/dev.c:1761 [inline]
 call_netdevice_notifiers net/core/dev.c:1775 [inline]
 __dev_notify_flags+0x1e9/0x2c0 net/core/dev.c:7655
 dev_change_flags+0x10d/0x170 net/core/dev.c:7691
 do_setlink+0x9fa/0x3520 net/core/rtnetlink.c:2497
 rtnl_group_changelink net/core/rtnetlink.c:2978 [inline]
 __rtnl_newlink+0xdba/0x16c0 net/core/rtnetlink.c:3134
 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3254
 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:5223
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:657
 ___sys_sendmsg+0x803/0x920 net/socket.c:2311
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356
 __do_sys_sendmsg net/socket.c:2365 [inline]
 __se_sys_sendmsg net/socket.c:2363 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a09
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2baeac1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a09
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2baeac26d4
R13: 00000000004c7922 R14: 00000000004dd310 R15: 00000000ffffffff

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/21 00:55 upstream f97c81dc6ca5 d96e88f3 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/15 13:23 upstream 35a7f35ad1b1 caf12900 .config console log report ci-upstream-kasan-gce
2018/09/13 14:30 upstream 54eda9df17f3 19e9088b .config console log report ci-upstream-kasan-gce-selinux-root
2018/02/16 08:18 upstream 1388c80438e6 c8b3f7c1 .config console log report ci-upstream-kasan-gce
2018/12/08 18:11 bpf ec3d837aac5d 60562a1d .config console log report ci-upstream-bpf-kasan-gce
* Struck through repros no longer work on HEAD.