list_add corruption. prev->next should be next (ffff888024251000), but was ffff88801e409000. (prev=ffffffff8e5b1120). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:30! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 32021 Comm: syz-executor.2 Not tainted 6.4.0-rc3-syzkaller-00004-g421ca22e3138 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:__list_add_valid+0xb9/0x100 lib/list_debug.c:30 Code: e8 0c e8 50 fd 0f 0b 4c 89 e1 48 c7 c7 20 14 a7 8a e8 fb e7 50 fd 0f 0b 48 89 f1 48 c7 c7 a0 14 a7 8a 4c 89 e6 e8 e7 e7 50 fd <0f> 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 20 15 a7 8a e8 d0 e7 50 RSP: 0018:ffffc9000443f7f0 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff888020428000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168b8fc RDI: 0000000000000005 RBP: ffff888020428000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff888024251000 R13: ffff888024251000 R14: 0000000000000000 R15: ffff888048de6140 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f59b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000056b49404 CR3: 0000000025306000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:1604 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+0x37a/0x4a0 drivers/char/misc.c:165 chrdev_open+0x26a/0x770 fs/char_dev.c:414 do_dentry_open+0x6cc/0x13f0 fs/open.c:920 do_open fs/namei.c:3636 [inline] path_openat+0x1baa/0x2750 fs/namei.c:3791 do_filp_open+0x1ba/0x410 fs/namei.c:3818 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_compat_sys_openat fs/open.c:1432 [inline] __se_compat_sys_openat fs/open.c:1430 [inline] __ia32_compat_sys_openat+0x143/0x1f0 fs/open.c:1430 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f5e579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f595cc EFLAGS: 00000296 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000700 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid+0xb9/0x100 lib/list_debug.c:30 Code: e8 0c e8 50 fd 0f 0b 4c 89 e1 48 c7 c7 20 14 a7 8a e8 fb e7 50 fd 0f 0b 48 89 f1 48 c7 c7 a0 14 a7 8a 4c 89 e6 e8 e7 e7 50 fd <0f> 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 20 15 a7 8a e8 d0 e7 50 RSP: 0018:ffffc9000443f7f0 EFLAGS: 00010282 RAX: 0000000000000075 RBX: ffff888020428000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168b8fc RDI: 0000000000000005 RBP: ffff888020428000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff888024251000 R13: ffff888024251000 R14: 0000000000000000 R15: ffff888048de6140 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f59b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7ed7db0 CR3: 0000000025306000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi