INFO: task syz-executor.1:8261 blocked for more than 145 seconds. Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28096 pid:8261 ppid:3650 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5194 [inline] __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506 schedule+0xda/0x1b0 kernel/sched/core.c:6582 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160 p9_conn_destroy net/9p/trans_fd.c:891 [inline] p9_fd_close+0x328/0x580 net/9p/trans_fd.c:921 p9_client_destroy+0xbe/0x370 net/9p/client.c:1040 v9fs_session_init+0x1003/0x1810 fs/9p/v9fs.c:488 v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5ec728b5a9 RSP: 002b:00007f5ec69de168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f5ec73ac050 RCX: 00007f5ec728b5a9 RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f5ec72e6580 R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdaf76957f R14: 00007f5ec69de300 R15: 0000000000022000 INFO: task syz-executor.4:8274 blocked for more than 145 seconds. Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27688 pid:8274 ppid:3647 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5194 [inline] __schedule+0xbd2/0x55b0 kernel/sched/core.c:6506 schedule+0xda/0x1b0 kernel/sched/core.c:6582 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ca/0x5c0 kernel/sched/completion.c:106 __flush_work+0x58d/0xae0 kernel/workqueue.c:3073 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3160 p9_conn_destroy net/9p/trans_fd.c:891 [inline] p9_fd_close+0x328/0x580 net/9p/trans_fd.c:921 p9_client_destroy+0xbe/0x370 net/9p/client.c:1040 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226 deactivate_locked_super+0x94/0x160 fs/super.c:331 v9fs_mount+0x7d4/0xc90 fs/9p/vfs_super.c:207 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1530 do_new_mount fs/namespace.c:3040 [inline] path_mount+0x1326/0x1e20 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f246308b5a9 RSP: 002b:00007f24627de168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f24631ac050 RCX: 00007f246308b5a9 RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007f24630e6580 R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5d95d73f R14: 00007f24627de300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc6b/0xfc0 kernel/hung_task.c:369 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:112