==================================================================
BUG: KASAN: use-after-free in dev_map_generic_redirect+0x9f/0x7d0 kernel/bpf/devmap.c:668
Read of size 8 at addr ffff88810020b600 by task syz.0.1255/3300

CPU: 1 PID: 3300 Comm: syz.0.1255 Not tainted 6.1.128-syzkaller-00009-g70d032fba5f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:427
 kasan_report+0x13c/0x170 mm/kasan/report.c:531
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
 dev_map_generic_redirect+0x9f/0x7d0 kernel/bpf/devmap.c:668
 xdp_do_generic_redirect_map net/core/filter.c:4415 [inline]
 xdp_do_generic_redirect+0x42e/0xb40 net/core/filter.c:4474
 do_xdp_generic+0x53e/0x800 net/core/dev.c:4968
 __netif_receive_skb_core+0x19ae/0x43d0 net/core/dev.c:5375
 __netif_receive_skb_one_core net/core/dev.c:5552 [inline]
 __netif_receive_skb+0x11c/0x530 net/core/dev.c:5668
 process_backlog+0x32c/0x630 net/core/dev.c:5996
 __napi_poll+0xbe/0x5c0 net/core/dev.c:6563
 napi_poll net/core/dev.c:6630 [inline]
 net_rx_action+0x595/0xdd0 net/core/dev.c:6744
 handle_softirqs+0x1db/0x650 kernel/softirq.c:624
 __do_softirq+0xb/0xd kernel/softirq.c:662
 do_softirq+0xf6/0x150 kernel/softirq.c:506
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x75/0x80 kernel/softirq.c:430
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:870 [inline]
 __dev_queue_xmit+0x156c/0x3730 net/core/dev.c:4341
 dev_queue_xmit include/linux/netdevice.h:3076 [inline]
 neigh_hh_output include/net/neighbour.h:536 [inline]
 neigh_output include/net/neighbour.h:550 [inline]
 ip6_finish_output2+0x1200/0x1850 net/ipv6/ip6_output.c:138
 __ip6_finish_output net/ipv6/ip6_output.c:205 [inline]
 ip6_finish_output+0x50f/0xa60 net/ipv6/ip6_output.c:216
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:237
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ip6_xmit+0xc5d/0x1650 net/ipv6/ip6_output.c:357
 inet6_csk_xmit+0x341/0x4e0 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x1e9e/0x35a0 net/ipv4/tcp_output.c:1403
 tcp_transmit_skb net/ipv4/tcp_output.c:1421 [inline]
 tcp_send_syn_data net/ipv4/tcp_output.c:3849 [inline]
 tcp_connect+0x2e27/0x5210 net/ipv4/tcp_output.c:3888
 tcp_v6_connect+0x1251/0x1b10 net/ipv6/tcp_ipv6.c:342
 __inet_stream_connect+0x254/0xe50 net/ipv4/af_inet.c:669
 tcp_sendmsg_fastopen+0x38c/0x5d0 net/ipv4/tcp.c:1205
 tcp_sendmsg_locked+0x39d8/0x4000 net/ipv4/tcp.c:1253
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1488
 inet6_sendmsg+0xa1/0xc0 net/ipv6/af_inet6.c:668
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2143
 __do_sys_sendto net/socket.c:2155 [inline]
 __se_sys_sendto net/socket.c:2151 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2151
 x64_sys_call+0x15c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f620818d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6208f25038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f62083a5fa0 RCX: 00007f620818d169
RDX: fffffffffffffea7 RSI: 0000400000f6f000 RDI: 0000000000000003
RBP: 00007f620820e2a0 R08: 0000400000b63fe4 R09: 000000000000001c
R10: 0000000020000004 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62083a5fa0 R15: 00007ffc4d20ad18
 </TASK>

Allocated by task 3264:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc_node+0xb4/0x1e0 mm/slab_common.c:945
 kmalloc_node include/linux/slab.h:589 [inline]
 bpf_map_kmalloc_node+0xd0/0x2c0 kernel/bpf/syscall.c:454
 __dev_map_alloc_node+0x5c/0x4e0 kernel/bpf/devmap.c:851
 __dev_map_hash_update_elem kernel/bpf/devmap.c:961 [inline]
 dev_map_hash_update_elem+0x32b/0x7b0 kernel/bpf/devmap.c:995
 bpf_map_update_value+0x23a/0x410 kernel/bpf/syscall.c:228
 map_update_elem+0x500/0x680 kernel/bpf/syscall.c:1443
 __sys_bpf+0x460/0x7f0 kernel/bpf/syscall.c:4995
 __do_sys_bpf kernel/bpf/syscall.c:5111 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5109
 x64_sys_call+0x87f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 10:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook mm/slub.c:1771 [inline]
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0x21d/0x410 mm/slub.c:3702
 kfree+0x7a/0xf0 mm/slab_common.c:990
 dev_map_free+0x39a/0x6c0 kernel/bpf/devmap.c:222
 bpf_map_free_deferred+0xf7/0x1b0 kernel/bpf/syscall.c:637
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff88810020b600
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 96-byte region [ffff88810020b600, ffff88810020b660)

The buggy address belongs to the physical page:
page:ffffea00040082c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10020b
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004599880 dead000000000006 ffff888100042900
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 2212353547, free_ts 2115943744
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2637
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2644
 get_page_from_freelist+0x3a98/0x3b10 mm/page_alloc.c:4539
 __alloc_pages+0x234/0x610 mm/page_alloc.c:5837
 alloc_slab_page+0x6c/0xf0
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x90/0x3e0 mm/slub.c:2015
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203
 __slab_alloc+0x5d/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462
 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:563 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline]
 acpi_ut_evaluate_object+0x104/0x490 drivers/acpi/acpica/uteval.c:50
 acpi_ut_execute_power_methods+0x10e/0x270 drivers/acpi/acpica/uteval.c:288
 acpi_get_object_info+0x622/0x1060 drivers/acpi/acpica/nsxfname.c:356
 acpi_set_pnp_ids drivers/acpi/scan.c:1338 [inline]
 acpi_init_device_object+0x609/0x34f0 drivers/acpi/scan.c:1774
 acpi_add_single_object+0x105/0x1be0 drivers/acpi/scan.c:1824
 acpi_bus_check_add+0x404/0x970 drivers/acpi/scan.c:2084
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1545 [inline]
 free_pcp_prepare mm/page_alloc.c:1619 [inline]
 free_unref_page_prepare+0x9f1/0xa00 mm/page_alloc.c:3581
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3677
 free_the_page mm/page_alloc.c:830 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5926
 __free_slab+0xce/0x1a0 mm/slub.c:2039
 free_slab mm/slub.c:2054 [inline]
 discard_slab+0x29/0x40 mm/slub.c:2060
 __slab_free+0x205/0x280 mm/slub.c:3599
 do_slab_free mm/slub.c:3640 [inline]
 ___cache_free+0xc6/0xd0 mm/slub.c:3696
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_remove_cache+0x1a2/0x1c0 mm/kasan/quarantine.c:402
 kasan_cache_shrink+0x9/0x10 mm/kasan/generic.c:206
 kmem_cache_shrink+0xd/0x20 mm/slab_common.c:516
 acpi_os_purge_cache+0x15/0x20 drivers/acpi/osl.c:1580
 acpi_purge_cached_objects+0x8f/0xc0 drivers/acpi/acpica/utxface.c:239
 acpi_initialize_objects+0x2e/0x9b drivers/acpi/acpica/utxfinit.c:250
 acpi_bus_init+0xd6/0xa4c drivers/acpi/bus.c:1309
 acpi_init+0x88/0x1f9 drivers/acpi/bus.c:1397

Memory state around the buggy address:
 ffff88810020b500: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88810020b580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88810020b600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                   ^
 ffff88810020b680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88810020b700: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================