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 ffff888084ee64c8 by task syz-executor.4/1469

CPU: 0 PID: 1469 Comm: syz-executor.4 Not tainted 5.14.0-rc3-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:00007f21e40fa188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffdc4b248df R14: 00007f21e40fa300 R15: 0000000000022000

Allocated by task 1432:
 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]
 __allocate_fw_priv+0x98/0x330 drivers/base/firmware_loader/main.c:187
 alloc_lookup_fw_priv+0x1c0/0x380 drivers/base/firmware_loader/main.c:251
 _request_firmware_prepare+0x27c/0x630 drivers/base/firmware_loader/main.c:746
 _request_firmware+0x11b/0x560 drivers/base/firmware_loader/main.c:808
 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

Freed by task 1432:
 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+0xcf/0x2d0 mm/slub.c:4262
 kref_put include/linux/kref.h:65 [inline]
 free_fw_priv drivers/base/firmware_loader/main.c:290 [inline]
 firmware_free_data drivers/base/firmware_loader/main.c:586 [inline]
 release_firmware+0x139/0x1b0 drivers/base/firmware_loader/main.c:1055
 _request_firmware+0x408/0x560 drivers/base/firmware_loader/main.c:841
 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

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
 neigh_sysctl_unregister+0x74/0x90 net/core/neighbour.c:3719
 devinet_sysctl_unregister net/ipv4/devinet.c:2624 [inline]
 inetdev_destroy net/ipv4/devinet.c:324 [inline]
 inetdev_event+0x774/0x14d0 net/ipv4/devinet.c:1598
 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]
 call_netdevice_notifiers_extack net/core/dev.c:2135 [inline]
 call_netdevice_notifiers net/core/dev.c:2149 [inline]
 unregister_netdevice_many+0xf7e/0x1980 net/core/dev.c:11093
 default_device_exit_batch+0x43b/0x4c0 net/core/dev.c:11623
 ops_exit_list net/core/net_namespace.c:178 [inline]
 cleanup_net+0x7ec/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

The buggy address belongs to the object at ffff888084ee6400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
 256-byte region [ffff888084ee6400, ffff888084ee6500)
The buggy address belongs to the page:
page:ffffea000213b980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x84ee6
head:ffffea000213b980 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4948, ts 983672847885, free_ts 948791588507
 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]
 kmem_cache_alloc_trace+0x29d/0x340 mm/slub.c:2981
 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+0xab7/0xd00 security/smack/smack_lsm.c:3451
 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
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+0x7e/0x550 mm/page_alloc.c:3411
 __vunmap+0x926/0xa70 mm/vmalloc.c:2587
 netlink_skb_destructor+0x93/0x1c0 net/netlink/af_netlink.c:375
 skb_release_head_state+0xfb/0x210 net/core/skbuff.c:728
 skb_release_all net/core/skbuff.c:739 [inline]
 __kfree_skb+0x22/0x1d0 net/core/skbuff.c:755
 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline]
 netlink_unicast+0x7e6/0x9b0 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]
 kernel_sendmsg+0xf5/0x130 net/socket.c:743
 sock_no_sendpage+0x150/0x1b0 net/core/sock.c:2959
 kernel_sendpage+0x2ca/0x370 net/socket.c:3673
 sock_sendpage+0x7e/0xb0 net/socket.c:1002
 pipe_to_sendpage+0x258/0x340 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x351/0x8b0 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0x172/0x200 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe6/0x1c0 fs/splice.c:936

Memory state around the buggy address:
 ffff888084ee6380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888084ee6400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888084ee6480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff888084ee6500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888084ee6580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================