INFO: task syz-executor.2:16049 blocked for more than 143 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28512 pid:16049 ppid: 8832 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x171/0x280 kernel/sched/completion.c:157 usb_start_wait_urb+0x144/0x4c0 drivers/usb/core/message.c:63 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:387 do_proc_bulk+0x3a3/0x750 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2713 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7fb6814a0a39 RSP: 002b:00007fb67ea16188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb6815a3f60 RCX: 00007fb6814a0a39 RDX: 00000000200000c0 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007fb6814fac5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb681ad7b2f R14: 00007fb67ea16300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b981ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6243: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.0-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:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2957 Comm: systemd-journal Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__task_pid_nr_ns+0xa2/0x4b0 kernel/pid.c:500 Code: 18 01 00 00 e8 8f 1e 2a 00 49 81 c4 f0 05 00 00 e8 83 1e 2a 00 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 c6 03 00 00 4d 8b 24 24 e8 9f 46 15 00 31 ff 89 c5 89 c6 e8 RSP: 0018:ffffc9000c56ff10 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffffff8b84a720 RCX: 0000000000000000 RDX: 1ffff1100f6f8034 RSI: ffffffff814cb98d RDI: ffff88807fa3ddd0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff814cb974 R11: 0000000000000000 R12: ffff88807b7c01a0 R13: ffff88807b7c0000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f393e03d8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f393b6b9010 CR3: 000000001d0a8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: task_tgid_vnr include/linux/sched.h:1590 [inline] __do_sys_getpid+0x1a/0x20 kernel/sys.c:926 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+0x44/0xae RIP: 0033:0x7f393d2d5f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fff16072718 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 0000560ad693b1e0 RCX: 00007f393d2d5f17 RDX: 00007fff160727d0 RSI: 0000000000000000 RDI: 0000560ad693b1e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000202 R12: 00007fff160727d0 R13: 0000000000000b8d R14: 00007fff160755c0 R15: 00007fff16072bd0 ---------------- Code disassembly (best guess): 0: 18 01 sbb %al,(%rcx) 2: 00 00 add %al,(%rax) 4: e8 8f 1e 2a 00 callq 0x2a1e98 9: 49 81 c4 f0 05 00 00 add $0x5f0,%r12 10: e8 83 1e 2a 00 callq 0x2a1e98 15: 4c 89 e2 mov %r12,%rdx 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 c6 03 00 00 jne 0x3f6 <-- trapping instruction 30: 4d 8b 24 24 mov (%r12),%r12 34: e8 9f 46 15 00 callq 0x1546d8 39: 31 ff xor %edi,%edi 3b: 89 c5 mov %eax,%ebp 3d: 89 c6 mov %eax,%esi 3f: e8 .byte 0xe8