platform regulatory.0: Falling back to sysfs fallback for: regulatory.db ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x81/0xa0 lib/list_debug.c:23 Read of size 8 at addr ffff888027672ec8 by task syz-executor372/9791 CPU: 0 PID: 9791 Comm: syz-executor372 Not tainted 5.12.0-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+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436 __list_add_valid+0x81/0xa0 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 drivers/base/firmware_loader/fallback.c:516 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:581 [inline] firmware_fallback_sysfs+0x455/0xe20 drivers/base/firmware_loader/fallback.c:657 _request_firmware+0xa80/0xe80 drivers/base/firmware_loader/main.c:833 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x44a2b9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 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:00007f3b43d74318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004d04e8 RCX: 000000000044a2b9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00000000004d04e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0031313230386c6e R13: 00007ffea72acd0f R14: 00007f3b43d74400 R15: 0000000000022000 Allocated by task 9777: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] ____kasan_kmalloc mm/kasan/common.c:507 [inline] ____kasan_kmalloc mm/kasan/common.c:466 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:516 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:686 [inline] __allocate_fw_priv drivers/base/firmware_loader/main.c:187 [inline] alloc_lookup_fw_priv drivers/base/firmware_loader/main.c:251 [inline] _request_firmware_prepare drivers/base/firmware_loader/main.c:746 [inline] _request_firmware+0x2de/0xe80 drivers/base/firmware_loader/main.c:808 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 9777: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1581 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1606 slab_free mm/slub.c:3166 [inline] kfree+0xe5/0x7f0 mm/slub.c:4225 __free_fw_priv drivers/base/firmware_loader/main.c:283 [inline] kref_put include/linux/kref.h:65 [inline] free_fw_priv+0x2b1/0x4d0 drivers/base/firmware_loader/main.c:290 firmware_free_data drivers/base/firmware_loader/main.c:586 [inline] release_firmware.part.0+0xc7/0xf0 drivers/base/firmware_loader/main.c:1055 release_firmware drivers/base/firmware_loader/main.c:842 [inline] _request_firmware+0x709/0xe80 drivers/base/firmware_loader/main.c:841 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:877 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888027672e00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 200 bytes inside of 256-byte region [ffff888027672e00, ffff888027672f00) The buggy address belongs to the page: page:ffffea00009d9c80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27672 head:ffffea00009d9c80 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011041b40 raw: 0000000000000000 0000000080100010 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 8433, ts 83112003041, free_ts 82944029982 prep_new_page mm/page_alloc.c:2358 [inline] get_page_from_freelist+0x1033/0x2b60 mm/page_alloc.c:3994 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1644 [inline] allocate_slab+0x2c5/0x4c0 mm/slub.c:1784 new_slab mm/slub.c:1847 [inline] new_slab_objects mm/slub.c:2593 [inline] ___slab_alloc+0x44c/0x7a0 mm/slub.c:2756 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2796 slab_alloc_node mm/slub.c:2878 [inline] slab_alloc mm/slub.c:2920 [inline] __kmalloc+0x315/0x330 mm/slub.c:4063 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:686 [inline] fib_create_info+0x8a7/0x4870 net/ipv4/fib_semantics.c:1419 fib_table_insert+0x1cd/0x1af0 net/ipv4/fib_trie.c:1224 fib_magic+0x3b9/0x520 net/ipv4/fib_frontend.c:1085 fib_add_ifaddr+0x476/0x500 net/ipv4/fib_frontend.c:1127 fib_netdev_event+0x488/0x670 net/ipv4/fib_frontend.c:1464 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2121 call_netdevice_notifiers_extack net/core/dev.c:2133 [inline] call_netdevice_notifiers net/core/dev.c:2147 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8786 dev_change_flags+0x112/0x170 net/core/dev.c:8824 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_pages_ok+0x476/0xce0 mm/page_alloc.c:1572 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:438 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:2912 [inline] slab_alloc mm/slub.c:2920 [inline] kmem_cache_alloc+0x219/0x3a0 mm/slub.c:2925 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags fs/namei.c:2734 [inline] user_path_at_empty+0xa1/0x100 fs/namei.c:2734 user_path_at include/linux/namei.h:60 [inline] ksys_umount fs/namespace.c:1776 [inline] __do_sys_umount fs/namespace.c:1784 [inline] __se_sys_umount fs/namespace.c:1782 [inline] __x64_sys_umount+0xf8/0x180 fs/namespace.c:1782 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff888027672d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888027672e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888027672e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888027672f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888027672f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================