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+0x81/0xa0 lib/list_debug.c:23 Read of size 8 at addr ffff888056a6bcc8 by task syz-executor.1/31177 CPU: 0 PID: 31177 Comm: syz-executor.1 Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x83/0xdf 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+0x455/0xe10 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:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa28e3d8188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffe973d37f R14: 00007fa28e3d8300 R15: 0000000000022000 Allocated by task 31144: 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:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [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:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 31144: 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:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1625 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1650 slab_free mm/slub.c:3210 [inline] kfree+0xe4/0x530 mm/slub.c:4264 __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:2504 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:723 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3029 [inline] call_rcu+0xb1/0x750 kernel/rcu/tree.c:3109 free_fib_info net/ipv4/fib_semantics.c:256 [inline] fib_info_put include/net/ip_fib.h:575 [inline] fib_release_info+0x601/0x8b0 net/ipv4/fib_semantics.c:277 fib_table_delete+0x78b/0xa40 net/ipv4/fib_trie.c:1762 fib_magic+0x321/0x540 net/ipv4/fib_frontend.c:1089 fib_del_ifaddr+0xc97/0x13c0 net/ipv4/fib_frontend.c:1297 fib_inetaddr_event+0xb4/0x2a0 net/ipv4/fib_frontend.c:1428 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 blocking_notifier_call_chain kernel/notifier.c:337 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:325 __inet_del_ifa+0x415/0xf70 net/ipv4/devinet.c:428 inet_del_ifa net/ipv4/devinet.c:465 [inline] inetdev_destroy net/ipv4/devinet.c:318 [inline] inetdev_event+0x671/0x15d0 net/ipv4/devinet.c:1598 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123 call_netdevice_notifiers_extack net/core/dev.c:2135 [inline] call_netdevice_notifiers net/core/dev.c:2149 [inline] unregister_netdevice_many+0x951/0x1790 net/core/dev.c:11093 default_device_exit_batch+0x2fa/0x3c0 net/core/dev.c:11623 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff888056a6bc00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 200 bytes inside of 256-byte region [ffff888056a6bc00, ffff888056a6bd00) The buggy address belongs to the page: page:ffffea00015a9a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x56a6a head:ffffea00015a9a80 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010841b40 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 0x52a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 9710, ts 555530356270, free_ts 547817684799 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4169 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5391 alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2244 alloc_slab_page mm/slub.c:1688 [inline] allocate_slab+0x32e/0x4b0 mm/slub.c:1828 new_slab mm/slub.c:1891 [inline] new_slab_objects mm/slub.c:2637 [inline] ___slab_alloc+0x4ba/0x820 mm/slub.c:2800 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2840 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc_trace+0x30f/0x3c0 mm/slub.c:2981 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] br_multicast_new_group net/bridge/br_multicast.c:1057 [inline] br_multicast_new_group+0x167/0x610 net/bridge/br_multicast.c:1042 __br_multicast_add_group+0x51b/0x650 net/bridge/br_multicast.c:1255 br_multicast_add_group net/bridge/br_multicast.c:1303 [inline] br_ip6_multicast_add_group.part.0+0x165/0x1f0 net/bridge/br_multicast.c:1355 br_ip6_multicast_add_group net/bridge/br_multicast.c:2573 [inline] br_ip6_multicast_mld2_report net/bridge/br_multicast.c:2572 [inline] br_multicast_ipv6_rcv net/bridge/br_multicast.c:3390 [inline] br_multicast_rcv+0xfe9/0x5b90 net/bridge/br_multicast.c:3425 br_dev_xmit+0x6bf/0x16a0 net/bridge/br_device.c:85 __netdev_start_xmit include/linux/netdevice.h:4944 [inline] netdev_start_xmit include/linux/netdevice.h:4958 [inline] xmit_one net/core/dev.c:3659 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3675 __dev_queue_xmit+0x2988/0x3620 net/core/dev.c:4285 neigh_resolve_output net/core/neighbour.c:1496 [inline] neigh_resolve_output+0x50e/0x820 net/core/neighbour.c:1476 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0x764/0x19d0 net/ipv6/ip6_output.c:145 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1346 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397 free_unref_page_prepare mm/page_alloc.c:3332 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3411 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:375 apply_to_pte_range mm/memory.c:2532 [inline] apply_to_pmd_range mm/memory.c:2576 [inline] apply_to_pud_range mm/memory.c:2612 [inline] apply_to_p4d_range mm/memory.c:2648 [inline] __apply_to_page_range+0x694/0x1080 mm/memory.c:2682 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:485 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1670 try_purge_vmap_area_lazy mm/vmalloc.c:1689 [inline] free_vmap_area_noflush+0xa5b/0xd10 mm/vmalloc.c:1731 free_unmap_vmap_area mm/vmalloc.c:1744 [inline] remove_vm_area+0x1cc/0x230 mm/vmalloc.c:2483 vm_remove_mappings mm/vmalloc.c:2512 [inline] __vunmap+0x392/0xb70 mm/vmalloc.c:2577 __vfree+0x3c/0xd0 mm/vmalloc.c:2635 vfree+0x5a/0x90 mm/vmalloc.c:2666 kcov_put kernel/kcov.c:408 [inline] kcov_put+0x26/0x40 kernel/kcov.c:404 kcov_close+0xc/0x10 kernel/kcov.c:510 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbd4/0x2a60 kernel/exit.c:825 Memory state around the buggy address: ffff888056a6bb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888056a6bc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888056a6bc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888056a6bd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888056a6bd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 retq 32: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W