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 ffff8881ee055288 by task syz-executor151/302 CPU: 1 PID: 302 Comm: syz-executor151 Not tainted 5.4.125-syzkaller-00028-g73e6d86c30ee #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+0x1d8/0x24e lib/dump_stack.c:118 print_address_description+0x9b/0x650 mm/kasan/report.c:384 __kasan_report+0x182/0x260 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 __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+0x480/0xb20 drivers/base/firmware_loader/fallback.c:654 _request_firmware+0x1287/0x1770 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+0xed8/0x13b0 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+0x865/0x9f0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9ab/0xd40 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x583/0x8c0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 net/socket.c:2398 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f504ffba7c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcb55bcdf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000009888 RCX: 00007f504ffba7c9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcb55bcf98 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcb55bce0c R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Allocated by task 12: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] __kasan_kmalloc+0x137/0x1e0 mm/kasan/common.c:529 kmem_cache_alloc_trace+0x139/0x2b0 mm/slub.c:2848 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+0x524/0x1770 drivers/base/firmware_loader/main.c:771 request_firmware_work_func+0x121/0x260 drivers/base/firmware_loader/main.c:978 process_one_work+0x679/0x1030 kernel/workqueue.c:2277 worker_thread+0xa6f/0x1400 kernel/workqueue.c:2423 kthread+0x30f/0x330 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Freed by task 12: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x18a/0x240 mm/kasan/common.c:487 slab_free_hook mm/slub.c:1454 [inline] slab_free_freelist_hook+0x7b/0x150 mm/slub.c:1492 slab_free mm/slub.c:3072 [inline] kfree+0xe0/0x660 mm/slub.c:4061 __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+0x145a/0x1770 drivers/base/firmware_loader/main.c:795 request_firmware_work_func+0x121/0x260 drivers/base/firmware_loader/main.c:978 process_one_work+0x679/0x1030 kernel/workqueue.c:2277 worker_thread+0xa6f/0x1400 kernel/workqueue.c:2423 kthread+0x30f/0x330 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881ee055200 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 136 bytes inside of 192-byte region [ffff8881ee055200, ffff8881ee0552c0) The buggy address belongs to the page: page:ffffea0007b81540 refcount:1 mapcount:0 mapping:ffff8881f5c02a00 index:0x0 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5c02a00 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x19a/0x380 mm/page_alloc.c:2171 get_page_from_freelist+0x550/0x8b0 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x3a2/0x880 mm/page_alloc.c:4855 alloc_slab_page+0x39/0x3e0 mm/slub.c:342 allocate_slab mm/slub.c:1675 [inline] new_slab+0x97/0x460 mm/slub.c:1741 new_slab_objects mm/slub.c:2498 [inline] ___slab_alloc+0x330/0x4c0 mm/slub.c:2659 __slab_alloc mm/slub.c:2699 [inline] slab_alloc_node mm/slub.c:2784 [inline] slab_alloc mm/slub.c:2829 [inline] kmem_cache_alloc_trace+0x199/0x2b0 mm/slub.c:2846 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+0x524/0x1770 drivers/base/firmware_loader/main.c:771 request_firmware_work_func+0x121/0x260 drivers/base/firmware_loader/main.c:978 process_one_work+0x679/0x1030 kernel/workqueue.c:2277 worker_thread+0xa6f/0x1400 kernel/workqueue.c:2423 kthread+0x30f/0x330 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 page_owner free stack trace missing Memory state around the buggy address: ffff8881ee055180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881ee055200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881ee055280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881ee055300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881ee055380: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ================================================================== syz-executor151 (302) used greatest stack depth: 21296 bytes left