platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x36/0xc0 lib/list_debug.c:23
Read of size 8 at addr ffff8880167fdac8 by task syz-executor.4/15054

CPU: 0 PID: 15054 Comm: syz-executor.4 Not tainted 5.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:105
 print_address_description+0x66/0x3b0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x163/0x210 mm/kasan/report.c:436
 __list_add_valid+0x36/0xc0 lib/list_debug.c:23
 __list_add include/linux/list.h:67 [inline]
 list_add include/linux/list.h:86 [inline]
 fw_load_sysfs_fallback+0x110/0x720 drivers/base/firmware_loader/fallback.c:516
 fw_load_from_user_helper+0x242/0x320 drivers/base/firmware_loader/fallback.c:581
 _request_firmware+0x3b4/0x560 drivers/base/firmware_loader/main.c:833
 request_firmware+0x35/0x50 drivers/base/firmware_loader/main.c:877
 reg_reload_regdb+0x81/0x200 net/wireless/reg.c:1095
 genl_family_rcv_msg_doit net/netlink/genetlink.c:739 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0xfb4/0x13c0 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2504
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x9e7/0xe00 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg net/socket.c:723 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2392
 ___sys_sendmsg net/socket.c:2446 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdb2ce08188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 000000000000c080 RSI: 0000000020000540 RDI: 0000000000000004
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffc7c0d72df R14: 00007fdb2ce08300 R15: 0000000000022000

Allocated by task 14774:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xc4/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 kmem_cache_alloc_trace+0x96/0x340 mm/slub.c:2983
 kmalloc include/linux/slab.h:591 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 smk_fetch security/smack/smack_lsm.c:288 [inline]
 smack_d_instantiate+0x6e2/0xd00 security/smack/smack_lsm.c:3408
 security_d_instantiate+0xa5/0x100 security/security.c:2038
 d_instantiate_new+0x61/0x110 fs/dcache.c:2027
 ext4_add_nondir+0x22b/0x290 fs/ext4/namei.c:2706
 ext4_symlink+0x9ce/0x1000 fs/ext4/namei.c:3535
 vfs_symlink+0x396/0x530 fs/namei.c:4182
 do_symlinkat+0x251/0x510 fs/namei.c:4212
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 14774:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x3d/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0x109/0x150 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1625 [inline]
 slab_free_freelist_hook+0x1d8/0x290 mm/slub.c:1650
 slab_free mm/slub.c:3210 [inline]
 kfree+0xd0/0x1f0 mm/slub.c:4264
 smk_fetch security/smack/smack_lsm.c:300 [inline]
 smack_d_instantiate+0x764/0xd00 security/smack/smack_lsm.c:3408
 security_d_instantiate+0xa5/0x100 security/security.c:2038
 d_instantiate_new+0x61/0x110 fs/dcache.c:2027
 ext4_add_nondir+0x22b/0x290 fs/ext4/namei.c:2706
 ext4_symlink+0x9ce/0x1000 fs/ext4/namei.c:3535
 vfs_symlink+0x396/0x530 fs/namei.c:4182
 do_symlinkat+0x251/0x510 fs/namei.c:4212
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:348
 kvfree_call_rcu+0x114/0x8a0 kernel/rcu/tree.c:3594
 drop_sysctl_table+0x2cd/0x430 fs/proc/proc_sysctl.c:1647
 drop_sysctl_table+0x2eb/0x430 fs/proc/proc_sysctl.c:1650
 unregister_sysctl_table+0x88/0x130 fs/proc/proc_sysctl.c:1685
 sysctl_route_net_exit+0x58/0x80 net/ipv4/route.c:3621
 ops_exit_list net/core/net_namespace.c:175 [inline]
 cleanup_net+0x758/0xc60 net/core/net_namespace.c:595
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Second to last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:348
 __call_rcu kernel/rcu/tree.c:3029 [inline]
 call_rcu+0x1a0/0xa20 kernel/rcu/tree.c:3109
 fib6_info_release include/net/ip6_fib.h:337 [inline]
 ip6_route_info_create+0xd2d/0x1a50 net/ipv6/route.c:3842
 ip6_route_add+0x22/0x120 net/ipv6/route.c:3856
 addrconf_prefix_route net/ipv6/addrconf.c:2415 [inline]
 inet6_addr_add+0xb16/0x1250 net/ipv6/addrconf.c:2948
 inet6_rtm_newaddr+0x826/0x2a90 net/ipv6/addrconf.c:4871
 rtnetlink_rcv_msg+0x91c/0xe50 net/core/rtnetlink.c:5574
 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x9e7/0xe00 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg net/socket.c:723 [inline]
 __sys_sendto+0x541/0x720 net/socket.c:2019
 __do_sys_sendto net/socket.c:2031 [inline]
 __se_sys_sendto net/socket.c:2027 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2027
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff8880167fda00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
 256-byte region [ffff8880167fda00, ffff8880167fdb00)
The buggy address belongs to the page:
page:ffffea000059ff00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167fc
head:ffffea000059ff00 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea000108c580 0000000700000007 ffff888011041b40
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x52a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4854, ts 158404698981, free_ts 154339119538
 prep_new_page mm/page_alloc.c:2436 [inline]
 get_page_from_freelist+0x779/0xa30 mm/page_alloc.c:4169
 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5391
 alloc_slab_page mm/slub.c:1688 [inline]
 allocate_slab+0xf1/0x540 mm/slub.c:1828
 new_slab mm/slub.c:1891 [inline]
 new_slab_objects mm/slub.c:2637 [inline]
 ___slab_alloc+0x1cf/0x350 mm/slub.c:2800
 __slab_alloc mm/slub.c:2840 [inline]
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 __kmalloc+0x2e7/0x390 mm/slub.c:4108
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 fib6_info_alloc+0x2c/0xd0 net/ipv6/ip6_fib.c:155
 ip6_route_info_create+0x507/0x1a50 net/ipv6/route.c:3762
 ip6_route_add+0x22/0x120 net/ipv6/route.c:3856
 addrconf_prefix_route net/ipv6/addrconf.c:2415 [inline]
 addrconf_add_linklocal+0x6e0/0xaf0 net/ipv6/addrconf.c:3184
 addrconf_addr_gen+0x3ff/0xe60 net/ipv6/addrconf.c:3301
 addrconf_notify+0x17ae/0x2110 net/ipv6/addrconf.c:3593
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2123 [inline]
 netdev_state_change+0x19b/0x260 net/core/dev.c:1514
 linkwatch_do_dev+0x10a/0x190 net/core/link_watch.c:167
 __linkwatch_run_queue+0x49f/0x7b0 net/core/link_watch.c:212
 linkwatch_event+0x48/0x50 net/core/link_watch.c:251
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1346 [inline]
 free_pcp_prepare+0xc29/0xd20 mm/page_alloc.c:1397
 free_unref_page_prepare mm/page_alloc.c:3332 [inline]
 free_unref_page_list+0x118/0xad0 mm/page_alloc.c:3448
 release_pages+0x18bb/0x1af0 mm/swap.c:972
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0x780/0x910 mm/mmu_gather.c:249
 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:340
 exit_mmap+0x404/0x7a0 mm/mmap.c:3203
 __mmput+0x111/0x370 kernel/fork.c:1101
 free_bprm+0x136/0x2f0 fs/exec.c:1479
 kernel_execve+0x740/0x9a0 fs/exec.c:1976
 call_usermodehelper_exec_async+0x262/0x3b0 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff8880167fd980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880167fda00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880167fda80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff8880167fdb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880167fdb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================