INFO: task syz-executor.2:21166 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28256 21166 8164 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 usb_start_wait_urb+0x14b/0x4c0 drivers/usb/core/message.c:62 usb usb9: usbfs: process 26752 (syz-executor.2) did not claim interface 0 before use usb usb9: usbfs: process 26766 (syz-executor.2) did not claim interface 0 before use usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:253 proc_bulk+0x3de/0x860 drivers/usb/core/devio.c:1211 usbdev_do_ioctl+0x696/0x3030 drivers/usb/core/devio.c:2435 usb usb9: usbfs: process 26781 (syz-executor.2) did not claim interface 0 before use usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa7f5c2f0d9 Code: Bad RIP value. RSP: 002b:00007fa7f41a1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa7f5d4ef80 RCX: 00007fa7f5c2f0d9 RDX: 0000000020000140 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007fa7f5c8aae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe92aa68bf R14: 00007fa7f41a1300 R15: 0000000000022000 usb usb9: usbfs: process 26858 (syz-executor.2) did not claim interface 0 before use Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 0000000000499546 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 usb usb9: usbfs: process 26873 (syz-executor.2) did not claim interface 0 before use 1 lock held by in:imklog/7859: #0: 0000000001fe775f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by kworker/u4:9/10815: usb usb9: usbfs: process 26895 (syz-executor.2) did not claim interface 0 before use usb usb9: usbfs: process 26897 (syz-executor.2) did not claim interface 0 before use 1 lock held by syz-executor.4/26853: 2 locks held by syz-executor.1/26850: 1 lock held by syz-executor.0/26870: 1 lock held by syz-executor.5/26894: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26870 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0018:ffff8880335a7318 EFLAGS: 00000246 RAX: ffff88803d79c080 RBX: ffff88809fa630bc RCX: ffffc90005d1e000 RDX: 0000000000000000 RSI: ffffffff866e902d RDI: ffff88809bbc5260 RBP: 7fffffffffffffff R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809fa62e80 R13: ffff88809bbc5180 R14: 0000000000034000 R15: dffffc0000000000 FS: 00007f9db29e2700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556b2a708 CR3: 000000009da40000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sock_alloc_send_pskb+0x6fd/0x830 net/core/sock.c:2111 rawv6_send_hdrinc net/ipv6/raw.c:645 [inline] rawv6_sendmsg+0x18b0/0x36a0 net/ipv6/raw.c:947 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 sock_no_sendpage+0xf5/0x140 net/core/sock.c:2686 kernel_sendpage net/socket.c:3585 [inline] sock_sendpage+0xdf/0x140 net/socket.c:912 pipe_to_sendpage+0x268/0x330 fs/splice.c:452 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:833 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1025 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9db44700d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9db29e2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f9db458ff80 RCX: 00007f9db44700d9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f9db44cbae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000100000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb78896af R14: 00007f9db29e2300 R15: 0000000000022000 usb usb9: usbfs: process 26907 (syz-executor.2) did not claim interface 0 before use