general protection fault, probably for non-canonical address 0xdffffc0000000034: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000001a0-0x00000000000001a7] CPU: 0 PID: 8686 Comm: syz-executor.3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_multicast_to_unicast net/mac80211/tx.c:4043 [inline] RIP: 0010:ieee80211_subif_start_xmit+0x24e/0xee0 net/mac80211/tx.c:4127 Code: 03 80 3c 02 00 0f 85 83 0c 00 00 49 8b 9f 10 17 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb a4 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 58 0c 00 00 RSP: 0018:ffffc90000007570 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 0000000000000034 RSI: ffffffff885ac7dd RDI: 00000000000001a4 RBP: ffff888013253000 R08: ffffffff8a635ba0 R09: ffffffff885ac74d R10: 0000000000000002 R11: 0000000000000003 R12: ffffffff8a631460 R13: ffff8880676a2042 R14: 000000000000005a R15: ffff88802d498000 FS: 00000000028b8940(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016b538d CR3: 000000001896a000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __netdev_start_xmit include/linux/netdevice.h:4776 [inline] netdev_start_xmit include/linux/netdevice.h:4790 [inline] xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590 sch_direct_xmit+0x2e1/0xbd0 net/sched/sch_generic.c:313 qdisc_restart net/sched/sch_generic.c:376 [inline] __qdisc_run+0x4ba/0x15f0 net/sched/sch_generic.c:384 qdisc_run include/net/pkt_sched.h:136 [inline] qdisc_run include/net/pkt_sched.h:128 [inline] __dev_xmit_skb net/core/dev.c:3765 [inline] __dev_queue_xmit+0x1489/0x2dd0 net/core/dev.c:4119 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0x8db/0x16c0 net/ipv6/ip6_output.c:117 __ip6_finish_output net/ipv6/ip6_output.c:182 [inline] __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161 ip6_finish_output+0x35/0x200 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:215 dst_output include/net/dst.h:441 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] mld_sendpack+0x92a/0xdb0 net/ipv6/mcast.c:1679 mld_send_cr net/ipv6/mcast.c:1975 [inline] mld_ifc_timer_expire+0x60a/0xf10 net/ipv6/mcast.c:2474 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 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+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x70 kernel/kcov.c:283 Code: 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 00 f0 01 00 e8 44 f0 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc900023df768 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 800000005da2b805 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 1ffff9200047beef R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81a4ee98 R11: 0000000000000000 R12: ffff88802d475108 R13: 000000000102b000 R14: 800000005da2b805 R15: 0000000000000000 vm_normal_page+0xc8/0x2a0 mm/memory.c:600 copy_present_pte mm/memory.c:860 [inline] copy_pte_range mm/memory.c:978 [inline] copy_pmd_range mm/memory.c:1058 [inline] copy_pud_range mm/memory.c:1095 [inline] copy_p4d_range mm/memory.c:1119 [inline] copy_page_range+0xddc/0x3fa0 mm/memory.c:1192 dup_mmap kernel/fork.c:594 [inline] dup_mm+0x9ed/0x1380 kernel/fork.c:1360 copy_mm kernel/fork.c:1416 [inline] copy_process+0x2a46/0x6fd0 kernel/fork.c:2097 kernel_clone+0xe7/0xab0 kernel/fork.c:2462 __do_sys_clone+0xc8/0x110 kernel/fork.c:2579 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c7ea Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00000000016afd40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00000000016afd40 RCX: 000000000045c7ea RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00000000016afd80 R08: 0000000000000001 R09: 00000000028b8940 R10: 00000000028b8c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 Modules linked in: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8686 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Modules linked in: CPU: 0 PID: 8686 Comm: syz-executor.3 Tainted: G D 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21 Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 20 8d b5 89 e8 bc f5 ef ff e9 e5 fe ff ff e8 52 c5 2d fd <0f> 0b e9 88 fd ff ff e8 e6 84 70 fd e9 11 fe ff ff 4c 89 ef e8 d9 RSP: 0018:ffffc90000007128 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff888143791e48 RCX: 0000000000000100 RDX: ffff88801c465340 RSI: ffffffff8444fbfe RDI: 0000000000000003 RBP: 0000000000000028 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8444f983 R11: 0000000000000000 R12: ffff888143790d40 R13: 0000000000fe4c00 R14: ffff8880b9e26a00 R15: ffffffff8444f8e0 FS: 00000000028b8940(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000016b538d CR3: 000000001896a000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:oops_end+0x4f/0xe0 arch/x86/kernel/dumpstack.c:369 Code: ff e8 65 7c 94 02 be 01 00 00 00 bf 07 00 00 00 c7 05 11 cd f0 09 ff ff ff ff e8 fc 18 1b 00 83 2d 2d 6d 37 0d 01 74 29 53 9d 2c 1c 1b 00 48 c7 c2 32 71 ca 8a be 02 00 00 00 48 c7 c7 a0 39 RSP: 0018:ffffc90000007408 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000246 RCX: 0000000000000100 RDX: ffff88801c465340 RSI: ffffffff8127cc54 RDI: ffffffff8e5f398c RBP: ffffc900000074c8 R08: 0000000000000000 R09: ffffffff8e615b07 R10: ffffffff8142e5ab R11: 0000000000000000 R12: 000000000000000b R13: 0000000000000000 R14: ffff88801c465340 R15: 0000000000000000 __exc_general_protection arch/x86/kernel/traps.c:603 [inline] exc_general_protection+0x18d/0x2f0 arch/x86/kernel/traps.c:530 asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:574 RIP: 0010:ieee80211_multicast_to_unicast net/mac80211/tx.c:4043 [inline] RIP: 0010:ieee80211_subif_start_xmit+0x24e/0xee0 net/mac80211/tx.c:4127 Code: 03 80 3c 02 00 0f 85 83 0c 00 00 49 8b 9f 10 17 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb a4 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 58 0c 00 00 RSP: 0018:ffffc90000007570 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 0000000000000034 RSI: ffffffff885ac7dd RDI: 00000000000001a4 RBP: ffff888013253000 R08: ffffffff8a635ba0 R09: ffffffff885ac74d R10: 0000000000000002 R11: 0000000000000003 R12: ffffffff8a631460 R13: ffff8880676a2042 R14: 000000000000005a R15: ffff88802d498000 __netdev_start_xmit include/linux/netdevice.h:4776 [inline] netdev_start_xmit include/linux/netdevice.h:4790 [inline] xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590 sch_direct_xmit+0x2e1/0xbd0 net/sched/sch_generic.c:313 qdisc_restart net/sched/sch_generic.c:376 [inline] __qdisc_run+0x4ba/0x15f0 net/sched/sch_generic.c:384 qdisc_run include/net/pkt_sched.h:136 [inline] qdisc_run include/net/pkt_sched.h:128 [inline] __dev_xmit_skb net/core/dev.c:3765 [inline] __dev_queue_xmit+0x1489/0x2dd0 net/core/dev.c:4119 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0x8db/0x16c0 net/ipv6/ip6_output.c:117 __ip6_finish_output net/ipv6/ip6_output.c:182 [inline] __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161 ip6_finish_output+0x35/0x200 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:215 dst_output include/net/dst.h:441 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] mld_sendpack+0x92a/0xdb0 net/ipv6/mcast.c:1679 mld_send_cr net/ipv6/mcast.c:1975 [inline] mld_ifc_timer_expire+0x60a/0xf10 net/ipv6/mcast.c:2474 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 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+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0xc/0x70 kernel/kcov.c:283 Code: 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 00 f0 01 00 e8 44 f0 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc900023df768 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 800000005da2b805 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 1ffff9200047beef R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81a4ee98 R11: 0000000000000000 R12: ffff88802d475108 R13: 000000000102b000 R14: 800000005da2b805 R15: 0000000000000000 vm_normal_page+0xc8/0x2a0 mm/memory.c:600 copy_present_pte mm/memory.c:860 [inline] copy_pte_range mm/memory.c:978 [inline] copy_pmd_range mm/memory.c:1058 [inline] copy_pud_range mm/memory.c:1095 [inline] copy_p4d_range mm/memory.c:1119 [inline] copy_page_range+0xddc/0x3fa0 mm/memory.c:1192 dup_mmap kernel/fork.c:594 [inline] dup_mm+0x9ed/0x1380 kernel/fork.c:1360 copy_mm kernel/fork.c:1416 [inline] copy_process+0x2a46/0x6fd0 kernel/fork.c:2097 kernel_clone+0xe7/0xab0 kernel/fork.c:2462 __do_sys_clone+0xc8/0x110 kernel/fork.c:2579 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c7ea Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:00000000016afd40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00000000016afd40 RCX: 000000000045c7ea RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00000000016afd80 R08: 0000000000000001 R09: 00000000028b8940 R10: 00000000028b8c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000