netlink: 32 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 68 bytes leftover after parsing attributes in process `syz-executor.2'. INFO: task syz-executor.1:28930 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.1 D28256 28930 8131 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_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 netlink: 32 bytes leftover after parsing attributes in process `syz-executor.2'. 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: 0033:0x7f8ca6ff2639 Code: Bad RIP value. RSP: 002b:00007f8ca5565168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8ca7112f80 RCX: 00007f8ca6ff2639 RDX: 00000000200001c0 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007f8ca704d7e1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6ba870ef R14: 00007f8ca5565300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:1/23: 1 lock held by khungtaskd/1571: #0: 000000005544d4e7 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7806: #0: 0000000040a7a53f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.5/8130: #0: 00000000eee745e0 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000eee745e0 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 1 lock held by syz-executor.5/4799: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 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: 4803 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:check_preemption_disabled+0xb/0x280 lib/smp_processor_id.c:12 Code: e8 2a 88 c0 fd 48 8b 3c 24 e8 81 44 21 fe e9 87 f7 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 49 89 f5 41 54 <55> 48 89 fd 53 e8 6b 67 eb fd 65 44 8b 25 23 63 8a 7c 65 8b 1d 3c RSP: 0018:ffff8880ba007d58 EFLAGS: 00000006 RAX: ffff888095e4c640 RBX: 000000000002be80 RCX: 0000000000000000 RDX: 0000000000010000 RSI: ffffffff88b3e0e0 RDI: ffffffff88b3e120 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffed101740455a R10: ffff8880ba022ad3 R11: ffffffff8c66501b R12: ffffffff89f88280 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fc6072d4700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200014c0 CR3: 000000008fbed000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1078 [inline] rcu_lockdep_current_cpu_online+0xb2/0x1b0 kernel/rcu/tree.c:1068 rcu_read_lock_sched_held+0xd3/0x1d0 kernel/rcu/update.c:115 trace_hrtimer_start include/trace/events/timer.h:191 [inline] debug_activate kernel/time/hrtimer.c:466 [inline] enqueue_hrtimer+0x322/0x3d0 kernel/time/hrtimer.c:972 __run_hrtimer kernel/time/hrtimer.c:1480 [inline] __hrtimer_run_queues+0xae6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:unwind_next_frame+0x50f/0x1400 arch/x86/kernel/unwind_orc.c:435 Code: 00 00 31 c0 e9 a4 fb ff ff 48 ba 00 00 00 00 00 fc ff df 4c 89 c6 49 8d 48 01 48 c1 ee 03 0f b6 34 16 48 89 cf 48 89 4c 24 20 <48> c1 ef 03 0f b6 14 17 4c 89 c7 83 e7 07 40 38 fe 40 0f 9e c7 40 RSP: 0018:ffff88804b077248 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000015 RBX: 1ffff1100960ee52 RCX: ffffffff8bfed507 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff8bfed507 RBP: 0000000000000001 R08: ffffffff8bfed506 R09: ffffffff8bfed502 R10: ffff88804b0773d7 R11: 0000000000074071 R12: ffff88804b0773c0 R13: ffff88804b0773ad R14: ffff88804b077378 R15: ffffffff8bfed502 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] alloc_skb_with_frags+0x92/0x570 net/core/skbuff.c:5333 sock_alloc_send_pskb+0x6e1/0x830 net/core/sock.c:2108 unix_dgram_sendmsg+0x3a5/0x12c0 net/unix/af_unix.c:1718 unix_seqpacket_sendmsg+0x111/0x1a0 net/unix/af_unix.c:2100 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2227 __sys_sendmmsg+0x195/0x470 net/socket.c:2322 __do_sys_sendmmsg net/socket.c:2351 [inline] __se_sys_sendmmsg net/socket.c:2348 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2348 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc608d61639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007fc6072d4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fc608e81f80 RCX: 00007fc608d61639 RDX: 03fffffffffffe36 RSI: 0000000020001e00 RDI: 0000000000000003 RBP: 00007fc608dbc7e1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd6cb111f R14: 00007fc6072d4300 R15: 0000000000022000