INFO: task syz-executor.3:25200 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28232 25200 6445 0x00004004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 __sched_text_start+0x8/0x8 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 trace_hardirqs_on_caller+0x5a/0x230 kernel/trace/trace_preemptirq.c:59 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline] atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline] __down_write kernel/locking/rwsem.c:1387 [inline] down_write+0xb2/0x150 kernel/locking/rwsem.c:1532 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 __down_timeout+0x2d0/0x2d0 register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729 bcm_init+0x1a3/0x210 net/can/bcm.c:1451 canbcm_pernet_init+0x90/0x90 net/can/bcm.c:1677 can_create+0x27c/0x500 net/can/af_can.c:168 __sock_create+0x3cb/0x730 net/socket.c:1433 sock_create net/socket.c:1484 [inline] __sys_socketpair+0x1be/0x560 net/socket.c:1584 __ia32_sys_socket+0xb0/0xb0 net/socket.c:1533 __do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline] __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline] __x64_sys_clock_gettime+0x165/0x240 kernel/time/posix-timers.c:1082 __ia32_sys_clock_settime+0x260/0x260 kernel/time/posix-timers.c:1410 __do_sys_socketpair net/socket.c:1637 [inline] __se_sys_socketpair net/socket.c:1634 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1634 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 INFO: task syz-executor.3:25205 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27624 25205 6445 0x00000004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 __sched_text_start+0x8/0x8 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113 rwsem_optimistic_spin+0x550/0x550 include/linux/compiler.h:226 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235 rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline] atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline] __down_write kernel/locking/rwsem.c:1387 [inline] down_write+0xb2/0x150 kernel/locking/rwsem.c:1532 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 __down_timeout+0x2d0/0x2d0 lockdep_init_map_waits+0x26a/0x890 kernel/locking/lockdep.c:4138 register_netdevice_notifier+0x1e/0x270 net/core/dev.c:1729 bcm_init+0x1a3/0x210 net/can/bcm.c:1451 canbcm_pernet_init+0x90/0x90 net/can/bcm.c:1677 can_create+0x27c/0x500 net/can/af_can.c:168 __sock_create+0x3cb/0x730 net/socket.c:1433 sock_create net/socket.c:1484 [inline] __sys_socketpair+0x1be/0x560 net/socket.c:1584 __ia32_sys_socket+0xb0/0xb0 net/socket.c:1533 __do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline] __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline] __x64_sys_clock_gettime+0x165/0x240 kernel/time/posix-timers.c:1082 __ia32_sys_clock_settime+0x260/0x260 kernel/time/posix-timers.c:1410 trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73 __do_sys_socketpair net/socket.c:1637 [inline] __se_sys_socketpair net/socket.c:1634 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1634 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1138 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x388/0x470 kernel/kthread.c:268 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4110 Comm: systemd-journal Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0xf0/0x1df0 arch/x86/kernel/unwind_orc.c:418 Code: b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 91 15 00 00 49 8b 47 48 48 89 44 24 08 49 8d 47 38 48 89 c2 <48> 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 RSP: 0018:ffffc90001627930 EFLAGS: 00000246 RAX: ffffc90001627a40 RBX: 1ffff920002c4f2e RCX: 0000000000000000 RDX: ffffc90001627a40 RSI: 0000000000000000 RDI: ffffc90001627a08 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: 00000000000286b7 R11: 000000000007001f R12: ffffc90001627a50 R13: 0000000000000000 R14: ffff888093ef22c0 R15: ffffc90001627a08 FS: 00007f96604f08c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8350141710 CR3: 00000000943d4000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x161/0x7a0 mm/slab.c:3665 deref_stack_reg+0xe0/0xe0 arch/x86/kernel/unwind_orc.c:354 rcu_lock_release include/linux/rcupdate.h:213 [inline] rcu_read_unlock include/linux/rcupdate.h:655 [inline] is_bpf_text_address+0xcb/0x160 kernel/bpf/core.c:706 kernel_text_address+0x6e/0xe0 kernel/extable.c:151 profile_setup.cold+0xc1/0xc1 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x161/0x7a0 mm/slab.c:3665 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 stack_trace_consume_entry+0x160/0x160 kernel/stacktrace.c:93 save_stack+0x1b/0x40 mm/kasan/common.c:49 save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x161/0x7a0 mm/slab.c:3665 kmalloc include/linux/slab.h:560 [inline] kzalloc include/linux/slab.h:669 [inline] lsm_cred_alloc security/security.c:532 [inline] security_prepare_creds+0x116/0x180 security/security.c:1605 prepare_creds+0x4bd/0x6b0 kernel/cred.c:285 do_faccessat+0x94/0x7a0 fs/open.c:360 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 save_stack+0x32/0x40 mm/kasan/common.c:51 save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x11b/0x740 mm/slab.c:3484 prepare_creds+0x39/0x6b0 kernel/cred.c:258 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 save_stack+0x1b/0x40 mm/kasan/common.c:49 __cache_free mm/slab.c:3426 [inline] kmem_cache_free+0x7f/0x320 mm/slab.c:3694 security_file_free+0xab/0xd0 security/security.c:1454 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 kernel_init_free_pages+0x120/0x120 include/linux/uaccess.h:173 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 fault_create_debugfs_attr+0x140/0x140 lib/fault-inject.c:227 kasan_poison_shadow mm/kasan/common.c:131 [inline] kasan_unpoison_shadow+0x30/0x40 mm/kasan/common.c:145 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x161/0x7a0 mm/slab.c:3665 kmalloc include/linux/slab.h:560 [inline] kzalloc include/linux/slab.h:669 [inline] lsm_cred_alloc security/security.c:532 [inline] security_prepare_creds+0x116/0x180 security/security.c:1605 trace_kmem_cache_alloc include/trace/events/kmem.h:54 [inline] kmem_cache_alloc+0x307/0x740 mm/slab.c:3486 kmalloc include/linux/slab.h:560 [inline] kzalloc include/linux/slab.h:669 [inline] lsm_cred_alloc security/security.c:532 [inline] security_prepare_creds+0x116/0x180 security/security.c:1605 prepare_creds+0x4bd/0x6b0 kernel/cred.c:285 do_faccessat+0x94/0x7a0 fs/open.c:360 __ia32_sys_fallocate+0xf0/0xf0 fs/open.c:338 trace_hardirqs_off+0x50/0x220 kernel/trace/trace_preemptirq.c:45 trace_hardirqs_off_caller+0x55/0x230 kernel/trace/trace_preemptirq.c:73 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f965f7ac9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd21b43bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffd21b46be0 RCX: 00007f965f7ac9c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055c83af7f9a3 RBP: 00007ffd21b43d00 R08: 000055c83af753e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055c83c0838a0 R15: 00007ffd21b441f0