INFO: task syz-executor.0:27663 can't die for more than 143 seconds. task:syz-executor.0 state:D stack:28512 pid:27663 ppid: 8396 flags:0x00000004 Call Trace: context_switch syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:4326 [inline] __schedule+0x90c/0x21a0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:5077 schedule+0xcf/0x270 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:5156 rwsem_down_write_slowpath+0x7e5/0x1200 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1106 __down_write_common syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1261 [inline] __down_write_common syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1258 [inline] __down_write syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1407 register_netdevice_notifier+0x1e/0x260 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/core/dev.c:1821 bcm_init+0x1a3/0x210 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/can/bcm.c:1449 can_create+0x27c/0x4d0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/can/af_can.c:168 __sock_create+0x3de/0x780 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1408 sock_create syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1459 [inline] __sys_socket+0xef/0x200 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1501 __do_sys_socket syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1510 [inline] __se_sys_socket syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1508 [inline] __x64_sys_socket+0x6f/0xb0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1508 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f5dbe119188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd14aa3b9f R14: 00007f5dbe119300 R15: 0000000000022000 INFO: task syz-executor.0:27663 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-next-20210205-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28512 pid:27663 ppid: 8396 flags:0x00000004 Call Trace: context_switch syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:4326 [inline] __schedule+0x90c/0x21a0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:5077 schedule+0xcf/0x270 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:5156 rwsem_down_write_slowpath+0x7e5/0x1200 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1106 __down_write_common syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1261 [inline] __down_write_common syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1258 [inline] __down_write syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/rwsem.c:1407 register_netdevice_notifier+0x1e/0x260 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/core/dev.c:1821 bcm_init+0x1a3/0x210 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/can/bcm.c:1449 can_create+0x27c/0x4d0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/can/af_can.c:168 __sock_create+0x3de/0x780 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1408 sock_create syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1459 [inline] __sys_socket+0xef/0x200 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1501 __do_sys_socket syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1510 [inline] __se_sys_socket syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1508 [inline] __x64_sys_socket+0x6f/0xb0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/socket.c:1508 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f5dbe119188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd14aa3b9f R14: 00007f5dbe119300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:2/51: 3 locks held by kworker/u4:5/211: 1 lock held by khungtaskd/1667: #0: ffffffff8bf6f820 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/locking/lockdep.c:6326 2 locks held by systemd-journal/4821: 1 lock held by in:imklog/8103: #0: ffff888024d3ad70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/file.c:961 2 locks held by kworker/1:226/19478: #0: ffff8880b9d35198 (&rq->lock){-.-.}-{2:2}, at: rq_lock syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/sched.h:1320 [inline] #0: ffff8880b9d35198 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/core.c:4994 #1: ffff8880b9d1f948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/sched/psi.c:833 1 lock held by syz-executor.0/27663: #0: ffffffff8d65f450 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/net/core/dev.c:1821 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1667 Comm: khungtaskd Not tainted 5.11.0-rc6-next-20210205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/./include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/hung_task.c:338 kthread+0x3b1/0x4a0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/kthread.c:292 ret_from_fork+0x1f/0x30 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4821 Comm: systemd-journal Not tainted 5.11.0-rc6-next-20210205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x11a/0x1f90 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/kernel/unwind_orc.c:428 Code: 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ff 15 00 00 49 8b 47 38 bf 01 00 00 00 48 89 44 24 10 51 b3 1b 00 4d 8d 77 50 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 RSP: 0018:ffffc900015ff980 EFLAGS: 00000246 RAX: ffffc900015ffa58 RBX: 1ffff920002bff38 RCX: ffffc900015ffb38 RDX: 1ffff920002bff5c RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffc900015ffaa8 R10: fffff520002bff60 R11: 0000000000000000 R12: ffffc900015ffaf0 R13: fffff520002bff56 R14: ffffc900015ffae0 R15: ffffc900015ffaa8 FS: 00007f57446588c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f574110d018 CR3: 000000001195c000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __unwind_start+0x51b/0x800 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/kernel/unwind_orc.c:696 unwind_start syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/./arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5c/0xe0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8c/0xc0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/kasan/common.c:38 kasan_set_track syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/kasan/common.c:46 [inline] set_alloc_info syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/kasan/common.c:403 [inline] ____kasan_kmalloc syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/kasan/common.c:434 [inline] ____kasan_kmalloc.constprop.0+0xa0/0xd0 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/kasan/common.c:406 kasan_slab_alloc syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/./include/linux/kasan.h:208 [inline] slab_post_alloc_hook syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/slab.h:516 [inline] slab_alloc_node syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/slub.c:2907 [inline] slab_alloc syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/slub.c:2915 [inline] kmem_cache_alloc+0x15e/0x380 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/mm/slub.c:2920 prepare_creds+0x3b/0x730 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/kernel/cred.c:258 access_override_creds syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/open.c:355 [inline] do_faccessat+0x3f4/0x850 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/fs/open.c:419 do_syscall_64+0x2d/0x70 syzkaller/managers/upstream-linux-next-kasan-gce-root/kernel/arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f57439139c7 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:00007fff381ecf58 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fff381efe70 RCX: 00007f57439139c7 RDX: 00007f5744384a00 RSI: 0000000000000000 RDI: 0000562d01d769a3 RBP: 00007fff381ecf90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fff381efe70 R15: 00007fff381ed480