list_add corruption. next->prev should be prev (ffffffff8e8abbe0), but was 057f01e200001dbb. (next=ffff88807a738000). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:27! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7626 Comm: syz-executor.4 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:__list_add_valid+0xa5/0x100 lib/list_debug.c:27 Code: c7 c7 20 9e c7 8a e8 ba 58 4d fd 0f 0b 48 c7 c7 c0 9e c7 8a e8 ac 58 4d fd 0f 0b 4c 89 e1 48 c7 c7 20 9f c7 8a e8 9b 58 4d fd <0f> 0b 48 89 f1 48 c7 c7 a0 9f c7 8a 4c 89 e6 e8 87 58 4d fd 0f 0b RSP: 0018:ffffc9001633f828 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff88807a73f000 RCX: ffffc9000c562000 RDX: 0000000000000000 RSI: ffffffff81691b9c RDI: 0000000000000005 RBP: ffff88807a73f000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88807a738000 R13: ffff88807a738000 R14: 0000000000000000 R15: ffff88807a739140 FS: 00007f360e3dd6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f16411bfd58 CR3: 0000000059d86000 CR4: 0000000000350ef0 Call Trace: __list_add include/linux/list.h:69 [inline] list_add include/linux/list.h:88 [inline] nfc_llcp_register_device+0x7a8/0x9e0 net/nfc/llcp_core.c:1639 nfc_register_device+0x70/0x3c0 net/nfc/core.c:1124 nci_register_device+0x7cb/0xb50 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x14f/0x230 drivers/nfc/virtual_ncidev.c:148 misc_open+0x383/0x4a0 drivers/char/misc.c:165 chrdev_open+0x273/0x780 fs/char_dev.c:414 do_dentry_open+0x6ce/0x17b0 fs/open.c:914 do_open fs/namei.c:3636 [inline] path_openat+0x1b65/0x2710 fs/namei.c:3793 do_filp_open+0x1ba/0x410 fs/namei.c:3820 do_sys_openat2+0x160/0x1c0 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x143/0x1f0 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f360f87cb29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f360e3dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f360f99c050 RCX: 00007f360f87cb29 RDX: 0000000000000002 RSI: 0000000020002c00 RDI: ffffffffffffff9c RBP: 00007f360f8c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f360f99c050 R15: 00007ffd80b9d7e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid+0xa5/0x100 lib/list_debug.c:27 Code: c7 c7 20 9e c7 8a e8 ba 58 4d fd 0f 0b 48 c7 c7 c0 9e c7 8a e8 ac 58 4d fd 0f 0b 4c 89 e1 48 c7 c7 20 9f c7 8a e8 9b 58 4d fd <0f> 0b 48 89 f1 48 c7 c7 a0 9f c7 8a 4c 89 e6 e8 87 58 4d fd 0f 0b RSP: 0018:ffffc9001633f828 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff88807a73f000 RCX: ffffc9000c562000 RDX: 0000000000000000 RSI: ffffffff81691b9c RDI: 0000000000000005 RBP: ffff88807a73f000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88807a738000 R13: ffff88807a738000 R14: 0000000000000000 R15: ffff88807a739140 FS: 00007f360e3dd6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6140775198 CR3: 0000000059d86000 CR4: 0000000000350ee0