skbuff: skb_over_panic: text:ffffffff830a6c8f len:184 put:172 head:ffff888156191400 data:ffff888156191400 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16978 Comm: dhcpcd-run-hook Not tainted 5.10.77-syzkaller-01258-g76698ea35fd3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 8c 4d 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0018:ffffc9000015fee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85873b60 RCX: 716d263ce4ab1a00 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc9000015ff30 R08: ffffffff81545288 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff888156191400 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0adbaa9ee CR3: 00000001139dd000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic+0x2c/0x30 net/core/skbuff.c:115 skb_put+0x205/0x210 net/core/skbuff.c:1877 skb_put_zero include/linux/skbuff.h:2270 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1116 [inline] cdc_ncm_fill_tx_frame+0x127f/0x3d50 drivers/net/usb/cdc_ncm.c:1293 cdc_ncm_tx_fixup+0x98/0xf0 drivers/net/usb/cdc_ncm.c:1514 usbnet_start_xmit+0x111/0x1a60 drivers/net/usb/usbnet.c:1338 __netdev_start_xmit include/linux/netdevice.h:4823 [inline] netdev_start_xmit include/linux/netdevice.h:4837 [inline] xmit_one+0x16a/0x480 net/core/dev.c:3589 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3605 sch_direct_xmit+0x28f/0x9b0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x245/0x3e0 net/sched/sch_generic.c:409 qdisc_run include/net/pkt_sched.h:127 [inline] __dev_xmit_skb net/core/dev.c:3781 [inline] __dev_queue_xmit+0xe7e/0x2ac0 net/core/dev.c:4135 dev_queue_xmit+0x17/0x20 net/core/dev.c:4200 neigh_resolve_output+0x693/0x740 net/core/neighbour.c:1497 neigh_output include/net/neighbour.h:518 [inline] ip6_finish_output2+0x109c/0x1930 net/ipv6/ip6_output.c:145 __ip6_finish_output+0x610/0x7b0 net/ipv6/ip6_output.c:210 ip6_finish_output+0x3f/0x1e0 net/ipv6/ip6_output.c:220 NF_HOOK_COND include/linux/netfilter.h:293 [inline] ip6_output+0x211/0x4c0 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] mld_sendpack+0x5fc/0xb20 net/ipv6/mcast.c:1676 mld_send_cr net/ipv6/mcast.c:1972 [inline] mld_ifc_timer_expire+0x85b/0xc50 net/ipv6/mcast.c:2471 call_timer_fn+0x35/0x280 kernel/time/timer.c:1420 expire_timers+0x21f/0x3b0 kernel/time/timer.c:1465 __run_timers+0x548/0x680 kernel/time/timer.c:1756 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1769 __do_softirq+0x27e/0x598 kernel/softirq.c:305 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:402 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:update_stack_state+0x349/0x530 arch/x86/kernel/unwind_frame.c:234 Code: f7 e8 9b b5 72 00 48 8b 45 90 49 89 06 48 b8 00 00 00 00 00 fc ff df 48 8b 4d a0 80 3c 01 00 74 09 48 8b 7d a8 e8 77 b5 72 00 <49> c7 45 58 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 4d c0 RSP: 0018:ffffc9001012f2c0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff92002025e87 RCX: 1ffff92002025e8b RDX: 1ffff92002025e82 RSI: ffffc9001012f918 RDI: ffffc9001012f400 RBP: ffffc9001012f358 R08: ffffc9001012f4e8 R09: 0000000000000006 R10: ffffc9001012f4f0 R11: 0000000000000000 R12: 1ffff92002025e88 R13: ffffc9001012f400 R14: ffffc9001012f438 R15: ffffc9001012f440 unwind_next_frame+0x3d4/0x740 arch/x86/kernel/unwind_frame.c:305 arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121 save_stack+0x96/0x1e0 mm/page_owner.c:146 __reset_page_owner+0x36/0x170 mm/page_owner.c:174 reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1331 [inline] free_pcp_prepare+0x18f/0x1c0 mm/page_alloc.c:1405 free_unref_page_prepare mm/page_alloc.c:3291 [inline] free_unref_page mm/page_alloc.c:3341 [inline] free_the_page mm/page_alloc.c:5165 [inline] __free_pages+0x2e3/0x4a0 mm/page_alloc.c:5173 free_pages+0x7c/0x90 mm/page_alloc.c:5184 _pgd_free arch/x86/mm/pgtable.c:420 [inline] pgd_free+0x1a1/0x1b0 arch/x86/mm/pgtable.c:476 mm_free_pgd kernel/fork.c:666 [inline] __mmdrop+0xb1/0x3c0 kernel/fork.c:717 mmdrop include/linux/sched/mm.h:49 [inline] __mmput+0x2b7/0x2c0 kernel/fork.c:1138 mmput+0x4b/0x50 kernel/fork.c:1149 exec_mmap fs/exec.c:1033 [inline] begin_new_exec+0xbb9/0x2360 fs/exec.c:1280 load_elf_binary+0x876/0x4e60 fs/binfmt_elf.c:998 search_binary_handler fs/exec.c:1707 [inline] exec_binprm+0x2a9/0xab0 fs/exec.c:1748 bprm_execve+0x6ae/0xa70 fs/exec.c:1824 do_execveat_common+0x46f/0x5d0 fs/exec.c:1919 do_execve fs/exec.c:1987 [inline] __do_sys_execve fs/exec.c:2063 [inline] __se_sys_execve fs/exec.c:2058 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2058 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd0adaf7337 Code: Unable to access opcode bytes at RIP 0x7fd0adaf730d. RSP: 002b:00007fff44bb60a8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 0000557bf8198c80 RCX: 00007fd0adaf7337 RDX: 0000557bf8198ca8 RSI: 0000557bf8198c80 RDI: 0000557bf8198d38 RBP: 0000557bf8198d38 R08: 0000557bf8198d3d R09: 00007fd0adce9000 R10: 00007fd0ad98d800 R11: 0000000000000246 R12: 0000557bf8198ca8 R13: 00007fd0adc9cff4 R14: 0000557bf8198ca8 R15: 0000000000000000 Modules linked in: ---[ end trace 6fa1d000eb72fbb8 ]--- RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 8c 4d 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0018:ffffc9000015fee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85873b60 RCX: 716d263ce4ab1a00 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc9000015ff30 R08: ffffffff81545288 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff888156191400 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0adaf730d CR3: 00000001139dd000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: f7 e8 imul %eax 2: 9b fwait 3: b5 72 mov $0x72,%ch 5: 00 48 8b add %cl,-0x75(%rax) 8: 45 90 rex.RB xchg %eax,%r8d a: 49 89 06 mov %rax,(%r14) d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 14: fc ff df 17: 48 8b 4d a0 mov -0x60(%rbp),%rcx 1b: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 1f: 74 09 je 0x2a 21: 48 8b 7d a8 mov -0x58(%rbp),%rdi 25: e8 77 b5 72 00 callq 0x72b5a1 * 2a: 49 c7 45 58 00 00 00 movq $0x0,0x58(%r13) <-- trapping instruction 31: 00 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 48 8b 4d c0 mov -0x40(%rbp),%rcx