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BUG: KASAN: invalid-access in __packet_get_status+0xb8/0x138 net/packet/af_packet.c:439
Read at addr fcff00000b280000 by task syz-executor.0/3520
Pointer tag: [fc], memory tag: [f0]

CPU: 0 PID: 3520 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-g0a7b0acecea2 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x108/0x618 mm/kasan/report.c:488
 kasan_report+0x88/0xac mm/kasan/report.c:601
 report_tag_fault arch/arm64/mm/fault.c:331 [inline]
 do_tag_recovery arch/arm64/mm/fault.c:343 [inline]
 __do_kernel_fault+0x1a0/0x1dc arch/arm64/mm/fault.c:385
 do_bad_area arch/arm64/mm/fault.c:485 [inline]
 do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:764
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:840
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:432
 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:492
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:593
 __packet_get_status+0xb8/0x138 net/packet/af_packet.c:439
 packet_lookup_frame net/packet/af_packet.c:528 [inline]
 packet_current_rx_frame net/packet/af_packet.c:1121 [inline]
 tpacket_rcv+0x2b0/0xbd0 net/packet/af_packet.c:2356
 dev_queue_xmit_nit+0x27c/0x2c0 net/core/dev.c:2296
 xmit_one net/core/dev.c:3527 [inline]
 dev_hard_start_xmit+0x7c/0x118 net/core/dev.c:3547
 __dev_queue_xmit+0x1c0/0xe5c net/core/dev.c:4335
 dev_queue_xmit include/linux/netdevice.h:3091 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip6_finish_output2+0x3ac/0x914 net/ipv6/ip6_output.c:137
 __ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
 ip6_finish_output+0x228/0x344 net/ipv6/ip6_output.c:222
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x74/0x1cc net/ipv6/ip6_output.c:243
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK.constprop.0+0x50/0xe0 include/linux/netfilter.h:314
 ndisc_send_skb+0x1f8/0x3d8 net/ipv6/ndisc.c:509
 ndisc_send_rs+0x5c/0x1b0 net/ipv6/ndisc.c:719
 addrconf_rs_timer+0x160/0x2bc net/ipv6/addrconf.c:4037
 call_timer_fn.constprop.0+0x24/0x80 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers+0x218/0x254 kernel/time/timer.c:2408
 __run_timer_base kernel/time/timer.c:2419 [inline]
 __run_timer_base kernel/time/timer.c:2412 [inline]
 run_timer_base kernel/time/timer.c:2428 [inline]
 run_timer_softirq+0x8c/0xfc kernel/time/timer.c:2438
 __do_softirq+0x10c/0x264 kernel/softirq.c:554
 ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:81
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x1c/0x28 arch/arm64/kernel/irq.c:86
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu kernel/softirq.c:633 [inline]
 irq_exit_rcu+0xb8/0xd4 kernel/softirq.c:645
 __el1_irq arch/arm64/kernel/entry-common.c:537 [inline]
 el1_interrupt+0x38/0x64 arch/arm64/kernel/entry-common.c:551
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594
 caches_clean_inval_pou+0x68/0x84 arch/arm64/mm/cache.S:55
 __sync_icache_dcache+0xc4/0x114 arch/arm64/mm/flush.c:57
 __sync_cache_and_tags arch/arm64/include/asm/pgtable.h:346 [inline]
 __set_ptes arch/arm64/include/asm/pgtable.h:380 [inline]
 set_ptes arch/arm64/include/asm/pgtable.h:1498 [inline]
 insert_page_into_pte_locked+0x1cc/0x1fc mm/memory.c:1998
 insert_page mm/memory.c:2023 [inline]
 vm_insert_page+0x11c/0x198 mm/memory.c:2176
 packet_mmap+0xec/0x200 net/packet/af_packet.c:4599
 sock_mmap+0x20/0x2c net/socket.c:1416
 call_mmap include/linux/fs.h:2113 [inline]
 mmap_region+0x218/0x8cc mm/mmap.c:2820
 do_mmap+0x374/0x4b8 mm/mmap.c:1385
 vm_mmap_pgoff+0xf0/0x134 mm/util.c:573
 ksys_mmap_pgoff+0x184/0x204 mm/mmap.c:1431
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0x30/0x44 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:48
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:152
 el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598

The buggy address belongs to the physical page:
page: refcount:9 mapcount:1 mapping:0000000000000000 index:0x0 pfn:0x4b280
head: order:3 entire_mapcount:0 nr_pages_mapped:8 pincount:0
flags: 0x1ffe06006000040(head|arch_2|arch_3|node=0|zone=0|lastcpupid=0xfff|kasantag=0x3)
page_type: 0x0()
raw: 01ffe06006000040 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 0000000900000000 0000000000000000
head: 01ffe06006000040 0000000000000000 dead000000000122 0000000000000000
head: 0000000000000000 0000000000000000 0000000900000000 0000000000000000
head: 01ffe06006000003 fffffdffc02ca001 dead000000000122 00000008ffffffff
head: 0000000800000000 0000000000000000 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00000b27fe00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff00000b27ff00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff00000b280000: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0
                   ^
 ffff00000b280100: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0
 ffff00000b280200: f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0 f0
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