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 ffff88816d1e8088 by task syz-executor.5/29190 CPU: 0 PID: 29190 Comm: syz-executor.5 Not tainted 5.4.89-syzkaller-00264-gdc04463953b2 #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+0x1dd/0x24e lib/dump_stack.c:118 print_address_description+0x96/0x640 mm/kasan/report.c:374 __kasan_report+0x177/0x1f0 mm/kasan/report.c:506 kasan_report+0x30/0x60 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+0xe7b/0x1350 drivers/base/firmware_loader/main.c:788 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:831 reg_reload_regdb+0xa0/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xee9/0x13c0 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+0x868/0xa00 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9b9/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x587/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007feb49cd5c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd097bbebf R14: 00007feb49cd69c0 R15: 000000000119bf8c Allocated by task 29154: save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x129/0x1c0 mm/kasan/common.c:510 kmem_cache_alloc_trace+0xc3/0x290 mm/slub.c:2830 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:710 [inline] _request_firmware+0x5aa/0x1350 drivers/base/firmware_loader/main.c:771 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:831 reg_reload_regdb+0xa0/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xee9/0x13c0 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+0x868/0xa00 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9b9/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x587/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 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 29154: 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+0x17e/0x230 mm/kasan/common.c:471 slab_free_hook mm/slub.c:1453 [inline] slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1486 slab_free mm/slub.c:3051 [inline] kfree+0x12c/0x660 mm/slub.c:4017 __free_fw_priv drivers/base/firmware_loader/main.c:261 [inline] kref_put include/linux/kref.h:65 [inline] free_fw_priv drivers/base/firmware_loader/main.c:268 [inline] firmware_free_data drivers/base/firmware_loader/main.c:546 [inline] release_firmware+0x47f/0x4d0 drivers/base/firmware_loader/main.c:954 _request_firmware+0x181/0x1350 drivers/base/firmware_loader/main.c:795 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:831 reg_reload_regdb+0xa0/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xee9/0x13c0 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+0x868/0xa00 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9b9/0xd50 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x587/0x8d0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 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 ffff88816d1e8000 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 136 bytes inside of 192-byte region [ffff88816d1e8000, ffff88816d1e80c0) The buggy address belongs to the page: page:ffffea0005b47a00 refcount:1 mapcount:0 mapping:ffff8881f6002a00 index:0x0 flags: 0x8000000000000200(slab) raw: 8000000000000200 ffffea0005b3b400 0000000400000004 ffff8881f6002a00 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88816d1e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88816d1e8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88816d1e8080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88816d1e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88816d1e8180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================