watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:21834] Modules linked in: irq event stamp: 2820361 hardirqs last enabled at (2820360): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2820361): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1940634): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (1940637): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1940637): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 21834 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:149 [inline] RIP: 0010:unwind_next_frame+0x24a/0x1400 arch/x86/kernel/unwind_orc.c:422 Code: 8d 43 ff 39 c6 0f 83 06 0e 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 bc 91 17 8c 48 89 f9 48 c1 e9 03 0f b6 0c 01 <48> 89 f8 83 e0 07 83 c0 03 38 c8 7c 27 84 c9 74 23 48 89 54 24 30 RSP: 0018:ffff8880ba107760 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017420ef5 RCX: 0000000000000000 RDX: 000000000000a0f5 RSI: 000000000000a0f5 RDI: ffffffff8c1a1590 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba1078ef R11: 0000000000074071 R12: ffff8880ba1078d8 R13: ffff8880ba1078c5 R14: ffff8880ba107890 R15: ffffffff81a0f557 FS: 00007fb26ae4a700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d68cc7b2e8 CR3: 000000009676a000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000001000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:316 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:415 mrp_attr_event+0x15d/0x220 net/802/mrp.c:510 mrp_mad_event net/802/mrp.c:590 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:607 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:317 [inline] RIP: 0010:PageHead include/linux/page-flags.h:505 [inline] RIP: 0010:follow_trans_huge_pmd+0x3a9/0xd80 mm/huge_memory.c:1468 Code: f6 e8 cb a3 c7 ff 49 83 fe ff 0f 84 3b 07 00 00 e8 2c a2 c7 ff 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 cb 08 00 00 49 8b 04 24 31 ff 48 c1 e8 0f 83 e0 01 89 c6 88 RSP: 0018:ffff88805f5ff340 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000020095000 RCX: ffffc9000b81a000 RDX: 1ffffd40001bc000 RSI: ffffffff819ae344 RDI: 0000000000000007 RBP: 0000000000000017 R08: 0000000000000000 R09: ffffffffffffffff R10: 0000000000000007 R11: 0000000050956640 R12: ffffea0000de0000 R13: ffff888055fa3800 R14: 00fff00000048068 R15: ffff88809b4f6c60 follow_pmd_mask mm/gup.c:327 [inline] follow_pud_mask mm/gup.c:370 [inline] follow_p4d_mask mm/gup.c:396 [inline] follow_page_mask+0x18a7/0x1d00 mm/gup.c:449 __get_user_pages+0x5e3/0x1710 mm/gup.c:742 __get_user_pages_locked mm/gup.c:916 [inline] get_user_pages_locked+0x243/0x480 mm/gup.c:1010 get_vaddr_frames+0x7d8/0x940 mm/frame_vector.c:73 vb2_create_framevec+0x77/0xf0 drivers/media/common/videobuf2/videobuf2-memops.c:56 vb2_vmalloc_get_userptr+0xe1/0x520 drivers/media/common/videobuf2/videobuf2-vmalloc.c:90 __prepare_userptr+0x33b/0x11a0 drivers/media/common/videobuf2/videobuf2-core.c:1053 __buf_prepare+0x44c/0x550 drivers/media/common/videobuf2/videobuf2-core.c:1278 vb2_core_qbuf+0x12e/0xb90 drivers/media/common/videobuf2/videobuf2-core.c:1406 vb2_qbuf+0x9f/0xf0 drivers/media/common/videobuf2/videobuf2-v4l2.c:572 v4l2_m2m_qbuf drivers/media/v4l2-core/v4l2-mem2mem.c:480 [inline] v4l2_m2m_ioctl_qbuf+0xd4/0x1b0 drivers/media/v4l2-core/v4l2-mem2mem.c:987 v4l_qbuf drivers/media/v4l2-core/v4l2-ioctl.c:1905 [inline] v4l_qbuf+0x92/0xc0 drivers/media/v4l2-core/v4l2-ioctl.c:1899 __video_do_ioctl+0x49a/0xcd0 drivers/media/v4l2-core/v4l2-ioctl.c:2838 video_usercopy+0x13f/0xfa0 drivers/media/v4l2-core/v4l2-ioctl.c:3012 v4l2_ioctl+0x147/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:364 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: 0033:0x7fb26c4f60e9 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:00007fb26ae4a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb26c609030 RCX: 00007fb26c4f60e9 RDX: 0000000020000300 RSI: 00000000c058560f RDI: 0000000000000003 RBP: 00007fb26c55008d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef279e44f R14: 00007fb26ae4a300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: 8d 43 ff lea -0x1(%rbx),%eax 3: 39 c6 cmp %eax,%esi 5: 0f 83 06 0e 00 00 jae 0xe11 b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 12: fc ff df 15: 89 f2 mov %esi,%edx 17: 48 8d 3c 95 bc 91 17 lea -0x73e86e44(,%rdx,4),%rdi 1e: 8c 1f: 48 89 f9 mov %rdi,%rcx 22: 48 c1 e9 03 shr $0x3,%rcx 26: 0f b6 0c 01 movzbl (%rcx,%rax,1),%ecx * 2a: 48 89 f8 mov %rdi,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 38 c8 cmp %cl,%al 35: 7c 27 jl 0x5e 37: 84 c9 test %cl,%cl 39: 74 23 je 0x5e 3b: 48 89 54 24 30 mov %rdx,0x30(%rsp)