list_add corruption. next->prev should be prev (ffff80000dad05c0), but was dead000000000122. (next=ffff0000d4958000). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 13136 Comm: syz-executor.3 Not tainted 6.2.0-rc3-syzkaller-16387-g9598c377d828 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_add_valid+0x9c/0xb8 lib/list_debug.c:27 lr : __list_add_valid+0x9c/0xb8 lib/list_debug.c:27 sp : ffff80001609b8f0 x29: ffff80001609b8f0 x28: 0000000000000030 x27: ffff0000c04404e0 x26: 0000000000000000 x25: ffff80000d84dbc0 x24: ffff80000d84dba8 x23: ffff80000d8314a0 x22: ffff80000dad0190 x21: ffff0000d4958000 x20: ffff80000dad05c0 x19: ffff0000d2a99800 x18: 00000000000002ed x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000d2df4e00 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000d2df4e00 x11: ff808000081cbbc8 x10: 0000000000000000 x9 : 3b1fbceaf23ee500 x8 : 3b1fbceaf23ee500 x7 : ffff80000816c254 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0001fefdef08 x1 : 0000000100000000 x0 : 0000000000000075 Call trace: __list_add_valid+0x9c/0xb8 lib/list_debug.c:27 __list_add include/linux/list.h:69 [inline] list_add include/linux/list.h:88 [inline] nfc_llcp_register_device+0x2c4/0x308 net/nfc/llcp_core.c:1603 nfc_register_device+0x74/0x208 net/nfc/core.c:1124 nci_register_device+0x338/0x3b0 net/nfc/nci/core.c:1257 virtual_ncidev_open+0xa0/0x10c drivers/nfc/virtual_ncidev.c:148 misc_open+0x1b8/0x200 drivers/char/misc.c:165 chrdev_open+0x2b4/0x2e8 fs/char_dev.c:414 do_dentry_open+0x364/0x748 fs/open.c:882 vfs_open+0x38/0x48 fs/open.c:1013 do_open fs/namei.c:3557 [inline] path_openat+0xe34/0x11f0 fs/namei.c:3714 do_filp_open+0xdc/0x1b8 fs/namei.c:3741 do_sys_openat2+0xb8/0x22c fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1337 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Code: b001c2a0 9134cc00 aa0803e1 94ac3987 (d4210000) ---[ end trace 0000000000000000 ]---