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 ffff8881d12b5788 by task syz-executor.3/7500 CPU: 0 PID: 7500 Comm: syz-executor.3 Not tainted 5.4.33-syzkaller-00454-gd573071fcc49 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x14a/0x1ce lib/dump_stack.c:118 print_address_description+0x93/0x620 mm/kasan/report.c:374 __kasan_report+0x16d/0x1e0 mm/kasan/report.c:506 kasan_report+0x34/0x60 mm/kasan/common.c:634 __list_add_valid+0x36/0xc0 lib/list_debug.c:23 __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:515 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:580 [inline] firmware_fallback_sysfs+0x48d/0xb30 drivers/base/firmware_loader/fallback.c:654 _request_firmware+0xe82/0x1360 drivers/base/firmware_loader/main.c:783 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:826 reg_reload_regdb+0xa6/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xeef/0x13c0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 genl_rcv+0x24/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x8ad/0xa50 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9de/0xd80 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x58a/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2d5/0x3c0 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c869 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f0a271f3c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0a271f46d4 RCX: 000000000045c869 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000977 R14: 00000000004d5b60 R15: 000000000076bf0c Allocated by task 7468: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x12c/0x1c0 mm/kasan/common.c:510 kmem_cache_alloc_trace+0xc3/0x280 mm/slub.c:2793 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] __allocate_fw_priv drivers/base/firmware_loader/main.c:174 [inline] alloc_lookup_fw_priv drivers/base/firmware_loader/main.c:229 [inline] _request_firmware_prepare drivers/base/firmware_loader/main.c:705 [inline] _request_firmware+0x5ab/0x1360 drivers/base/firmware_loader/main.c:766 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:826 reg_reload_regdb+0xa6/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xeef/0x13c0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 genl_rcv+0x24/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x8ad/0xa50 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9de/0xd80 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x58a/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2d5/0x3c0 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 7468: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x181/0x230 mm/kasan/common.c:471 slab_free_hook mm/slub.c:1424 [inline] slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1457 slab_free mm/slub.c:3014 [inline] kfree+0x12b/0x600 mm/slub.c:3975 __free_fw_priv drivers/base/firmware_loader/main.c:259 [inline] kref_put include/linux/kref.h:65 [inline] free_fw_priv drivers/base/firmware_loader/main.c:266 [inline] firmware_free_data drivers/base/firmware_loader/main.c:541 [inline] release_firmware+0x45f/0x4a0 drivers/base/firmware_loader/main.c:949 _request_firmware+0x181/0x1360 drivers/base/firmware_loader/main.c:790 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:826 reg_reload_regdb+0xa6/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xeef/0x13c0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 genl_rcv+0x24/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x8ad/0xa50 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9de/0xd80 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x58a/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2d5/0x3c0 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8881d12b5700 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 136 bytes inside of 192-byte region [ffff8881d12b5700, ffff8881d12b57c0) The buggy address belongs to the page: page:ffffea000744ad40 refcount:1 mapcount:0 mapping:ffff8881da803000 index:0xffff8881d12b5200 flags: 0x8000000000000200(slab) raw: 8000000000000200 ffffea0007676100 0000000400000004 ffff8881da803000 raw: ffff8881d12b5200 000000008010000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d12b5680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881d12b5700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881d12b5780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881d12b5800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d12b5880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================