list_add corruption. next->prev should be prev (ffffffff86104ae0), but was 0000000000000000. (next=ffff8881ea65c580). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:25! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7016 Comm: syz-executor.4 Not tainted 5.4.114-syzkaller-00373-g46403e120412 #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: 60 62 03 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 b2 d3 22 ff 0f 0b 48 c7 c7 20 61 03 85 4c 89 e6 4c 89 f1 31 c0 e8 9c d3 22 ff <0f> 0b 48 c7 c7 e0 61 03 85 4c 89 f6 4c 89 e1 31 c0 e8 86 d3 22 ff RSP: 0018:ffff8881843ef2c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881ea65c588 RCX: b8d113dc09655000 RDX: ffffc90003e92000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881ea65c580 R08: ffffffff814e8767 R09: ffffed103ede5e08 R10: ffffed103ede5e08 R11: 0000000000000000 R12: ffffffff86104ae0 R13: dffffc0000000000 R14: ffff8881ea65c580 R15: ffff8881e0b99380 FS: 00007fc5bc683700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001f62b38 CR3: 000000016b5da000 CR4: 00000000001406f0 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+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+0xed9/0x13b0 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: 0033:0x4665f9 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:00007fc5bc683188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff67ddaa1f R14: 00007fc5bc683300 R15: 0000000000022000 Modules linked in: ---[ end trace c37dff2c4d9a2b47 ]--- RIP: 0010:__list_add_valid+0xa0/0xc0 lib/list_debug.c:23 Code: 60 62 03 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 b2 d3 22 ff 0f 0b 48 c7 c7 20 61 03 85 4c 89 e6 4c 89 f1 31 c0 e8 9c d3 22 ff <0f> 0b 48 c7 c7 e0 61 03 85 4c 89 f6 4c 89 e1 31 c0 e8 86 d3 22 ff RSP: 0018:ffff8881843ef2c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881ea65c588 RCX: b8d113dc09655000 RDX: ffffc90003e92000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881ea65c580 R08: ffffffff814e8767 R09: ffffed103ede5e08 R10: ffffed103ede5e08 R11: 0000000000000000 R12: ffffffff86104ae0 R13: dffffc0000000000 R14: ffff8881ea65c580 R15: ffff8881e0b99380 FS: 00007fc5bc683700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5bc641718 CR3: 000000016b5da000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400