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 ffff8880172bbac8 by task syz-executor638/9765

CPU: 1 PID: 9765 Comm: syz-executor638 Not tainted 5.13.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x202/0x31e lib/dump_stack.c:120
 print_address_description+0x5f/0x3b0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x15c/0x200 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+0xaa6/0xe90 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2337
 ___sys_sendmsg net/socket.c:2391 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2420
 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x44a509
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 16 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0c87b07318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004d62a8 RCX: 000000000044a509
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000004d62a0 R08: 0000000000000099 R09: 0000000000000000
R10: 000000000000000c R11: 0000000000000246 R12: 0031313230386c6e
R13: 00007fffded9c3cf R14: 00007f0c87b07400 R15: 0000000000022000

Allocated by task 9756:
 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:428 [inline]
 ____kasan_kmalloc+0xc4/0xf0 mm/kasan/common.c:507
 kasan_kmalloc include/linux/kasan.h:246 [inline]
 kmem_cache_alloc_trace+0x96/0x340 mm/slub.c:2941
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 __allocate_fw_priv+0x98/0x340 drivers/base/firmware_loader/main.c:187
 alloc_lookup_fw_priv+0x1c3/0x380 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+0xaa6/0xe90 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2337
 ___sys_sendmsg net/socket.c:2391 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2420
 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 9756:
 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:357
 ____kasan_slab_free+0x109/0x150 mm/kasan/common.c:360
 kasan_slab_free include/linux/kasan.h:212 [inline]
 slab_free_hook mm/slub.c:1583 [inline]
 slab_free_freelist_hook+0x1d8/0x290 mm/slub.c:1608
 slab_free mm/slub.c:3168 [inline]
 kfree+0xcf/0x2d0 mm/slub.c:4212
 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+0xaa6/0xe90 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg net/socket.c:674 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2337
 ___sys_sendmsg net/socket.c:2391 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2420
 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff8880172bba00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
 256-byte region [ffff8880172bba00, ffff8880172bbb00)
The buggy address belongs to the page:
page:ffffea00005cae80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x172ba
head:ffffea00005cae80 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 0000000c00000001 ffff888011841b40
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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 759, ts 2479290537, free_ts 2338312955
 prep_new_page mm/page_alloc.c:2358 [inline]
 get_page_from_freelist+0x779/0xa20 mm/page_alloc.c:3994
 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5200
 alloc_slab_page mm/slub.c:1646 [inline]
 allocate_slab+0xf1/0x5b0 mm/slub.c:1786
 new_slab mm/slub.c:1849 [inline]
 new_slab_objects mm/slub.c:2595 [inline]
 ___slab_alloc+0x1cf/0x350 mm/slub.c:2758
 __slab_alloc mm/slub.c:2798 [inline]
 slab_alloc_node mm/slub.c:2880 [inline]
 slab_alloc mm/slub.c:2922 [inline]
 __kmalloc+0x2ed/0x390 mm/slub.c:4050
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc+0x1d/0x30 include/linux/slab.h:686
 lsm_cred_alloc security/security.c:536 [inline]
 security_prepare_creds+0x46/0x220 security/security.c:1690
 prepare_creds+0x411/0x5f0 kernel/cred.c:285
 prepare_exec_creds+0x14/0x260 kernel/cred.c:304
 prepare_bprm_creds fs/exec.c:1466 [inline]
 bprm_execve+0xf9/0x1470 fs/exec.c:1798
 kernel_execve+0x8ce/0x9a0 fs/exec.c:1973
 call_usermodehelper_exec_async+0x262/0x3b0 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1298 [inline]
 free_pcp_prepare+0x3ea/0x420 mm/page_alloc.c:1342
 free_unref_page_prepare mm/page_alloc.c:3250 [inline]
 free_unref_page_list+0x126/0x650 mm/page_alloc.c:3318
 release_pages+0x1944/0x1b80 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+0x2c6/0x5f0 mm/mmap.c:3210
 __mmput+0x111/0x370 kernel/fork.c:1096
 free_bprm+0x136/0x2f0 fs/exec.c:1478
 kernel_execve+0x740/0x9a0 fs/exec.c:1975
 call_usermodehelper_exec_async+0x262/0x3b0 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Memory state around the buggy address:
 ffff8880172bb980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880172bba00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880172bba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff8880172bbb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880172bbb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================