INFO: task syz-executor.0:8955 blocked for more than 143 seconds. Not tainted 5.13.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24816 pid: 8955 ppid: 8421 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0xb98/0x1120 kernel/sched/core.c:5147 schedule+0x14b/0x200 kernel/sched/core.c:5226 schedule_timeout+0x98/0x2c0 kernel/time/timer.c:1868 do_wait_for_common+0x2dd/0x450 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 __flush_work kernel/workqueue.c:3053 [inline] __cancel_work_timer+0x4dc/0x690 kernel/workqueue.c:3140 p9_conn_destroy net/9p/trans_fd.c:891 [inline] p9_fd_close+0x2a2/0x3c0 net/9p/trans_fd.c:921 p9_client_create+0xa28/0xf80 net/9p/client.c:1071 v9fs_session_init+0x1e6/0x18c0 fs/9p/v9fs.c:406 v9fs_mount+0x72/0x870 fs/9p/vfs_super.c:126 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x196f/0x2be0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007fa9d8ca6188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665d9 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00000000004bfcb9 R08: 0000000020000580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffed8ca17ef R14: 00007fa9d8ca6300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1615: #0: ffffffff8cf15c80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-journal/4838: #0: ffff8880b9a35118 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x86f/0xc60 kernel/sched/fair.c:10665 1 lock held by in:imklog/8102: 2 locks held by kworker/0:0/8643: #0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2249 #1: ffffc90001fffd20 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2251 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1615 Comm: khungtaskd Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x202/0x31e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcfb/0xd40 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4838 Comm: systemd-journal Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline] RIP: 0010:is_module_text_address+0xe4/0x130 kernel/module.c:4673 Code: 00 00 4c 01 f8 31 c9 4c 39 f0 48 0f 46 d9 4d 39 f7 48 0f 47 d9 eb 02 31 db bf 01 00 00 00 e8 d3 d8 e2 ff 65 8b 05 04 ea 8d 7e <85> c0 74 10 48 85 db 0f 95 c0 5b 41 5c 41 5d 41 5e 41 5f c3 e8 8a RSP: 0018:ffffc9000155f970 EFLAGS: 00000297 RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: ffffc9000155ff58 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000012 R09: ffffc9000155fab0 R10: fffff520002abf48 R11: 0000000000000000 R12: ffff888013da3880 R13: ffffffff816cee00 R14: 00007fee9463f687 R15: 1ffff920002abf45 FS: 00007fee953848c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fee92765000 CR3: 0000000014da8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernel_text_address kernel/extable.c:145 [inline] __kernel_text_address+0x81/0x100 kernel/extable.c:105 unwind_get_return_address+0x48/0x80 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x98/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0x96/0xd0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2921 [inline] kmem_cache_alloc+0x1d7/0x340 mm/slub.c:2926 getname_flags+0xba/0x640 fs/namei.c:138 getname fs/namei.c:209 [inline] user_path_create fs/namei.c:3650 [inline] do_mkdirat+0x91/0x3e0 fs/namei.c:3828 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fee9463f687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd28ebf958 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd28ec2870 RCX: 00007fee9463f687 RDX: 00007fee950b0a00 RSI: 00000000000001ed RDI: 000055c4baa628a0 RBP: 00007ffd28ebf990 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffd28ec2870 R15: 00007ffd28ebfe80