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: 9400 Comm: syz-executor414 Not tainted 5.11.0-rc1-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: 0000:ffffc90000007500 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 0000000000000034 RSI: ffffffff88551dbd RDI: 00000000000001a4 RBP: ffff888020816a00 R08: ffffffff8a627c40 R09: ffffffff88551d2d R10: 0000000000000002 R11: 0000000000000003 R12: ffffffff8a623500 R13: ffff8880241b0042 R14: 000000000000005a R15: ffff88801ab28000 FS: 0000000001ddd880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000200 CR3: 000000002bda4000 CR4: 00000000001506f0 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/0x15e0 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_resolve_output net/core/neighbour.c:1491 [inline] neigh_resolve_output+0x4d8/0x7e0 net/core/neighbour.c:1471 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0x6b8/0x16c0 net/ipv6/ip6_output.c:117 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline] __ip6_finish_output+0x447/0xab0 net/ipv6/ip6_output.c:128 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176 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+0x2a5/0x9f7 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:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49 Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb RSP: 0000:ffffc90002e27c68 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888000000000 RCX: 0000000000000340 RDX: 1ffff110053bc9b4 RSI: ffffffff81a43d21 RDI: ffff8880322b8cc0 RBP: ffff888029de3780 R08: 0000000000000000 R09: ffffffff8ebd97bf R10: ffffffff81a624e7 R11: 0000000000000000 R12: 0000000020000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffea0000c88000 clear_page arch/x86/include/asm/page_64.h:49 [inline] clear_user_page arch/x86/include/asm/page.h:28 [inline] clear_user_highpage include/linux/highmem.h:150 [inline] clear_subpage+0x7d/0x100 mm/memory.c:5096 process_huge_page mm/memory.c:5050 [inline] clear_huge_page+0xab/0x530 mm/memory.c:5110 __do_huge_pmd_anonymous_page mm/huge_memory.c:603 [inline] do_huge_pmd_anonymous_page+0x5cb/0x2390 mm/huge_memory.c:767 create_huge_pmd mm/memory.c:4269 [inline] __handle_mm_fault mm/memory.c:4493 [inline] handle_mm_fault+0x3391/0x5640 mm/memory.c:4620 do_user_addr_fault+0x570/0xc50 arch/x86/mm/fault.c:1393 handle_page_fault arch/x86/mm/fault.c:1450 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1506 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580 RIP: 0033:0x40082e Code: 10 00 00 00 bf 29 00 00 00 e8 6e 19 04 00 48 83 f8 ff 74 07 48 89 05 91 18 2d 00 48 b8 6e 6c 38 30 32 31 31 00 bf 00 02 00 20 <48> 89 04 25 00 02 00 20 e8 f5 0b 00 00 48 83 f8 ff 74 07 48 89 05 RSP: 002b:00007ffdc54f5ad0 EFLAGS: 00010217 RAX: 0031313230386c6e RBX: 0000000000000000 RCX: 0000000000442199 RDX: 0000000000000010 RSI: 0000000000000003 RDI: 0000000020000200 RBP: 000000000001d533 R08: 00000000004002e0 R09: 00000000004002e0 R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000402c50 R13: 0000000000402ce0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 51818c0af1a443d3 ]--- 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: 0000:ffffc90000007500 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: 0000000000000034 RSI: ffffffff88551dbd RDI: 00000000000001a4 RBP: ffff888020816a00 R08: ffffffff8a627c40 R09: ffffffff88551d2d R10: 0000000000000002 R11: 0000000000000003 R12: ffffffff8a623500 R13: ffff8880241b0042 R14: 000000000000005a R15: ffff88801ab28000 FS: 0000000001ddd880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000200 CR3: 000000002bda4000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400