divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:genelink_tx_fixup+0x415/0x5d0 drivers/net/usb/gl620a.c:172 Code: 04 28 84 c0 0f 85 ee 00 00 00 8b 1b 49 81 c4 90 00 00 00 4c 89 e0 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 ef 00 00 00 89 d8 31 d2 <41> f7 34 24 89 d3 31 ff 89 d6 e8 2c 61 64 fe 85 db 74 07 e8 03 5d RSP: 0018:ffffc900000c6eb0 EFLAGS: 00010246 RAX: 0000000000000062 RBX: 0000000000000062 RCX: ffff88810023bb40 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888180ff5570 RBP: ffffc900000c6f38 R08: ffffffff83089a30 R09: 0000000000000003 R10: fffff52000018e09 R11: 0000000000000004 R12: ffff888180298a10 R13: dffffc0000000000 R14: ffff88818100300e R15: ffff888180ff5500 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd0ea2fd0 CR3: 0000000153b41000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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:3583 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3599 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:3775 [inline] __dev_queue_xmit+0xe7e/0x2ac0 net/core/dev.c:4129 dev_queue_xmit+0x17/0x20 net/core/dev.c:4194 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 run_ksoftirqd+0x23/0x30 kernel/softirq.c:667 smpboot_thread_fn+0x551/0x930 kernel/smpboot.c:164 kthread+0x371/0x390 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Modules linked in: ---[ end trace 89b87f405863ba70 ]--- RIP: 0010:genelink_tx_fixup+0x415/0x5d0 drivers/net/usb/gl620a.c:172 Code: 04 28 84 c0 0f 85 ee 00 00 00 8b 1b 49 81 c4 90 00 00 00 4c 89 e0 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 ef 00 00 00 89 d8 31 d2 <41> f7 34 24 89 d3 31 ff 89 d6 e8 2c 61 64 fe 85 db 74 07 e8 03 5d RSP: 0018:ffffc900000c6eb0 EFLAGS: 00010246 RAX: 0000000000000062 RBX: 0000000000000062 RCX: ffff88810023bb40 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888180ff5570 RBP: ffffc900000c6f38 R08: ffffffff83089a30 R09: 0000000000000003 R10: fffff52000018e09 R11: 0000000000000004 R12: ffff888180298a10 R13: dffffc0000000000 R14: ffff88818100300e R15: ffff888180ff5500 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd0ea2fd0 CR3: 0000000153b41000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 28 add $0x28,%al 2: 84 c0 test %al,%al 4: 0f 85 ee 00 00 00 jne 0xf8 a: 8b 1b mov (%rbx),%ebx c: 49 81 c4 90 00 00 00 add $0x90,%r12 13: 4c 89 e0 mov %r12,%rax 16: 48 c1 e8 03 shr $0x3,%rax 1a: 42 8a 04 28 mov (%rax,%r13,1),%al 1e: 84 c0 test %al,%al 20: 0f 85 ef 00 00 00 jne 0x115 26: 89 d8 mov %ebx,%eax 28: 31 d2 xor %edx,%edx * 2a: 41 f7 34 24 divl (%r12) <-- trapping instruction 2e: 89 d3 mov %edx,%ebx 30: 31 ff xor %edi,%edi 32: 89 d6 mov %edx,%esi 34: e8 2c 61 64 fe callq 0xfe646165 39: 85 db test %ebx,%ebx 3b: 74 07 je 0x44 3d: e8 .byte 0xe8 3e: 03 .byte 0x3 3f: 5d pop %rbp