IPv6: ADDRCONF(NETDEV_UP): vlan895: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan896: link is not ready netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. xt_TCPMSS: Only works on TCP SYN packets watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:4520] Modules linked in: irq event stamp: 2870723 hardirqs last enabled at (2870722): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2870723): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (712): [] netlink_create+0x3c2/0x5e0 net/netlink/af_netlink.c:709 softirqs last disabled at (1323): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1323): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 4520 Comm: syz-executor.3 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x90/0x1400 arch/x86/kernel/unwind_orc.c:403 Code: 28 00 00 00 48 89 84 24 e0 00 00 00 48 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 74 08 3c 03 0f 8e b8 08 00 00 41 8b 2e 31 c0 85 ed <75> 45 48 ba 00 00 00 00 00 fc ff df 48 01 d3 48 c7 03 00 00 00 00 RSP: 0018:ffff8880ba0077a8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff11017400efe RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffff8880ba007738 RDI: ffff8880ba0078d8 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba007937 R11: 0000000000074071 R12: ffff8880ba007970 R13: 0000000000000000 R14: ffff8880ba0078d8 R15: 0000000000000740 FS: 00007fa2aa781700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa2aa77f6b8 CR3: 000000022a21a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 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 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/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:deref_stack_reg+0x184/0x1d0 arch/x86/kernel/unwind_orc.c:336 Code: 00 00 00 fc ff df 48 c7 04 13 00 00 00 00 48 8b 4c 24 60 65 48 2b 0c 25 28 00 00 00 75 47 48 83 c4 68 5b 5d 41 5c 41 5d 41 5e e8 76 d4 6e 00 e9 ec fe ff ff e8 fc d4 6e 00 e9 2f ff ff ff 4c RSP: 0018:ffff88822c7078e0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 1ffff110458e0f26 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff88822c707878 RDI: ffff88822c707ef8 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff88822c707a77 R11: 0000000000074071 R12: ffff88822c707f28 R13: ffff88822c707a4d R14: ffff88822c707a18 R15: ffffffff8bb40b96 unwind_next_frame+0xf83/0x1400 arch/x86/kernel/unwind_orc.c:555 __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+0x122/0x370 mm/slab.c:3559 getname_flags+0xce/0x590 fs/namei.c:140 do_mq_open+0x191/0x8c0 ipc/mqueue.c:780 __do_sys_mq_open ipc/mqueue.c:824 [inline] __se_sys_mq_open ipc/mqueue.c:817 [inline] __x64_sys_mq_open+0x14c/0x1e0 ipc/mqueue.c:817 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa2aa781188 EFLAGS: 00000246 ORIG_RAX: 00000000000000f0 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 00000000000000a8 RSI: 0000000000000040 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000440 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffcad70783f R14: 00007fa2aa781300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 63 Comm: kworker/u4:2 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:__read_once_size include/linux/compiler.h:261 [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 7c 4c 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:ffff8880b5296cd8 EFLAGS: 00000246 RAX: ffff8880b5286280 RBX: 1ffff11016a52da0 RCX: ffffffff81588f4e RDX: 0000000000000000 RSI: ffffffff81588f39 RDI: 0000000000000005 RBP: ffff8880b5296da8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 00000000d889db23 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002977848 CR3: 000000004f7f6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rep_nop arch/x86/include/asm/processor.h:656 [inline] cpu_relax arch/x86/include/asm/processor.h:661 [inline] csd_lock_wait kernel/smp.c:108 [inline] smp_call_function_single+0x1d9/0x420 kernel/smp.c:302 smp_call_function_many+0x743/0x8d0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x179/0x320 arch/x86/mm/tlb.c:728 flush_tlb_page arch/x86/include/asm/tlbflush.h:576 [inline] ptep_clear_flush+0x123/0x160 mm/pgtable-generic.c:87 page_mkclean_one+0x425/0x860 mm/rmap.c:912 rmap_walk_file+0x539/0xb10 mm/rmap.c:1897 rmap_walk+0x105/0x190 mm/rmap.c:1915 page_mkclean+0x20f/0x2b0 mm/rmap.c:981 clear_page_dirty_for_io+0x305/0xee0 mm/page-writeback.c:2687 mpage_submit_page+0x80/0x250 fs/ext4/inode.c:2215 mpage_process_page_bufs+0x534/0x630 fs/ext4/inode.c:2345 mpage_prepare_extent_to_map+0x9a2/0xf10 fs/ext4/inode.c:2707 ext4_writepages+0x111d/0x37f0 fs/ext4/inode.c:2835 do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __writeback_single_inode+0x10c/0x11d0 fs/fs-writeback.c:1385 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716 wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822 wb_check_old_data_flush fs/fs-writeback.c:1924 [inline] wb_do_writeback fs/fs-writeback.c:1977 [inline] wb_workfn+0x8ba/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 48 89 84 24 e0 00 00 mov %rax,0xe0(%rsp) b: 00 c: 48 89 f8 mov %rdi,%rax f: 48 c1 e8 03 shr $0x3,%rax 13: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 17: 84 c0 test %al,%al 19: 74 08 je 0x23 1b: 3c 03 cmp $0x3,%al 1d: 0f 8e b8 08 00 00 jle 0x8db 23: 41 8b 2e mov (%r14),%ebp 26: 31 c0 xor %eax,%eax 28: 85 ed test %ebp,%ebp * 2a: 75 45 jne 0x71 <-- trapping instruction 2c: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 33: fc ff df 36: 48 01 d3 add %rdx,%rbx 39: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)