¾ Ìˆ\‹©) failed (rc=-13) netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. INFO: task syz-executor0:3835 blocked for more than 140 seconds. Not tainted 4.4.146-g1396226 #79 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D ffff8801c240fa68 25744 3835 1 0x00000004 ffff8801c240fa68 0000000000000000 ffff8801d95a20e0 ffffed003b2b441b ffff8801d95a1800 ffff8801db21fe38 ffff8801db21fe60 ffff8801db21f558 ffff8801db21f540 ffff8801d6584800 ffff8801d95a1800 0000000000000000 Call Trace: [] schedule+0x7a/0x1b0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x307/0x850 kernel/locking/mutex.c:621 [] lo_ioctl+0x8c/0x16c0 drivers/block/loop.c:1364 [] __blkdev_driver_ioctl block/ioctl.c:288 [inline] [] blkdev_ioctl+0x7b8/0x19c0 block/ioctl.c:584 [] block_ioctl+0xde/0x120 fs/block_dev.c:1625 [] vfs_ioctl fs/ioctl.c:43 [inline] [] file_ioctl fs/ioctl.c:470 [inline] [] do_vfs_ioctl+0x63f/0xf40 fs/ioctl.c:605 [] SYSC_ioctl fs/ioctl.c:622 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613 [] entry_SYSCALL_64_fastpath+0x22/0x9e 1 lock held by syz-executor0/3835: #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8c/0x16c0 drivers/block/loop.c:1364 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.146-g1396226 #79 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffffffff84417840 task.stack: ffffffff84400000 RIP: 0010:[] [] native_apic_mem_write+0xc/0x10 arch/x86/include/asm/apic.h:93 RSP: 0018:ffff8801db207f90 EFLAGS: 00000046 RAX: ffffffff810c1100 RBX: ffffffff84470220 RCX: 0000000000000000 RDX: 1ffffffff088e062 RSI: 0000000000000000 RDI: 00000000000000b0 RBP: ffff8801db207f90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: fffffbfff0748adc R15: ffffffff84a07868 FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa201025000 CR3: 00000000b9aed000 CR4: 00000000001606f0 Stack: ffff8801db207fa8 ffffffff810a961b ffffffff84a07868 ffffffff84407dc8 ffffffff838caf80 ffffffff84407d18 ffffffff84a07868 fffffbfff0748adc 0000000000000000 0000000000000000 ffffffff84407dc8 ffffffff84a07868 Call Trace: d [] apic_eoi arch/x86/include/asm/apic.h:396 [inline] d [] ack_APIC_irq arch/x86/include/asm/apic.h:440 [inline] d [] smp_reschedule_interrupt+0x5b/0x80 arch/x86/kernel/smp.c:262 [] reschedule_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:764 d [] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:49 [] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline] [] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:432 [] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:423 [] default_idle_call+0x57/0x70 kernel/sched/idle.c:93 [] cpuidle_idle_call kernel/sched/idle.c:157 [inline] [] cpu_idle_loop kernel/sched/idle.c:253 [inline] [] cpu_startup_entry+0x6af/0x780 kernel/sched/idle.c:301 [] rest_init+0x188/0x18e init/main.c:410 [] start_kernel+0x6b3/0x6e7 init/main.c:682 [] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196 [] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:185 Code: 0c 07 00 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 be 01 00 00 00 48 89 e5 e8 82 2d 1b 00 5d c3 55 89 ff 48 89 e5 89 b7 00 b0 5f ff <5d> c3 66 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 89 fb NMI backtrace for cpu 1 CPU: 1 PID: 492 Comm: khungtaskd Not tainted 4.4.146-g1396226 #79 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d8cdb000 task.stack: ffff8801d8d40000 RIP: 0010:[] [] native_apic_mem_write arch/x86/include/asm/apic.h:93 [inline] RIP: 0010:[] [] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline] RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8801d8d47cc8 EFLAGS: 00000046 RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 RBP: ffff8801d8d47cf0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff84470220 FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f215864d000 CR3: 00000000b9aed000 CR4: 00000000001606f0 Stack: ffffffff84470220 ffffffff84a1a780 0000000000000007 fffffbfff0942fa4 0000000000000040 ffff8801d8d47d10 ffffffff810b7c11 ffffffff83c0d1a0 0000000000000003 ffff8801d8d47d68 ffffffff81e1d9a3 ffffffff8141022f Call Trace: [] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog.cold.1+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 62