list_add corruption. next->prev should be prev (ffffffff84cb7210), but was 80000001d0bd2007. (next=ffff8881910dcf80). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:25! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8483 Comm: syz-executor.5 Tainted: G W 5.4.63-syzkaller-01128-g0ef1db7b69dd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid+0xa0/0xc0 lib/list_debug.c:23 Code: cf 06 99 84 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 82 d4 30 ff 0f 0b 48 c7 c7 1a 06 99 84 4c 89 e6 4c 89 f1 31 c0 e8 6c d4 30 ff <0f> 0b 48 c7 c7 7d 06 99 84 4c 89 f6 4c 89 e1 31 c0 e8 56 d4 30 ff RSP: 0018:ffff8881956072c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881910dcf88 RCX: 521a4c1f15486900 RDX: ffffc90000352000 RSI: 0000000000007065 RDI: 0000000000007066 RBP: ffff8881910dcf80 R08: ffffffff812b99ce R09: ffffed103b725e00 R10: ffffed103b725e00 R11: 0000000000000000 R12: ffffffff84cb7210 R13: dffffc0000000000 R14: ffff8881910dcf80 R15: ffff88819022de80 FS: 00007f711533c700(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002001d000 CR3: 0000000196c55002 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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+0xe5f/0x1340 drivers/base/firmware_loader/main.c:783 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:826 reg_reload_regdb+0x81/0x200 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xe76/0x1330 net/netlink/genetlink.c:654 netlink_rcv_skb+0x1f0/0x460 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+0x87c/0xa20 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9a7/0xd40 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x56f/0x860 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x26a/0x350 net/socket.c:2398 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f711533bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002ac40 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffd7556d32f R14: 00007f711533c9c0 R15: 000000000118cf4c Modules linked in: ---[ end trace 0a76ed250562c8e6 ]--- RIP: 0010:__list_add_valid+0xa0/0xc0 lib/list_debug.c:23 Code: cf 06 99 84 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 82 d4 30 ff 0f 0b 48 c7 c7 1a 06 99 84 4c 89 e6 4c 89 f1 31 c0 e8 6c d4 30 ff <0f> 0b 48 c7 c7 7d 06 99 84 4c 89 f6 4c 89 e1 31 c0 e8 56 d4 30 ff RSP: 0018:ffff8881956072c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881910dcf88 RCX: 521a4c1f15486900 RDX: ffffc90000352000 RSI: 0000000000007065 RDI: 0000000000007066 RBP: ffff8881910dcf80 R08: ffffffff812b99ce R09: ffffed103b725e00 R10: ffffed103b725e00 R11: 0000000000000000 R12: ffffffff84cb7210 R13: dffffc0000000000 R14: ffff8881910dcf80 R15: ffff88819022de80 FS: 00007f711533c700(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556c2efc69d0 CR3: 0000000196c55001 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400