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:00007f6f37ffe0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6f3959bf80 RCX: 00007f6f3947cae9 RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 RBP: 00007f6f37ffe120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000000b R14: 00007f6f3959bf80 R15: 00007fffa6f10948 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 5216 Comm: syz-executor.2 Not tainted 6.6.0-rc1-syzkaller-00223-g1e73cfe85952 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 Code: 54 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 RSP: 0018:ffffc900035d7870 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000ac0d000 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffc900035d7900 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900035d7900 R13: 0000000000000cc0 R14: ffff888146a48600 R15: 0000000000000001 FS: 00007f6f37ffe6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f944fd4b723 CR3: 000000003e9b7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvasprintf_const+0x25/0x190 lib/kasprintf.c:45 kobject_set_name_vargs+0x5a/0x130 lib/kobject.c:272 kobject_add_varg lib/kobject.c:366 [inline] kobject_add+0x12a/0x240 lib/kobject.c:424 device_add+0x290/0x1ac0 drivers/base/core.c:3560 tty_register_device_attr+0x38f/0x7b0 drivers/tty/tty_io.c:3248 rfcomm_dev_add net/bluetooth/rfcomm/tty.c:331 [inline] __rfcomm_create_dev net/bluetooth/rfcomm/tty.c:424 [inline] rfcomm_create_dev net/bluetooth/rfcomm/tty.c:485 [inline] rfcomm_dev_ioctl+0x1670/0x1c50 net/bluetooth/rfcomm/tty.c:587 rfcomm_sock_ioctl+0xb0/0xe0 net/bluetooth/rfcomm/sock.c:873 sock_do_ioctl+0x113/0x270 net/socket.c:1203 sock_ioctl+0x229/0x6b0 net/socket.c:1322 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6f3947cae9 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:00007f6f37ffe0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6f3959bf80 RCX: 00007f6f3947cae9 RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 RBP: 00007f6f37ffe120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 000000000000000b R14: 00007f6f3959bf80 R15: 00007fffa6f10948 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329 Code: 54 ac f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89 RSP: 0018:ffffc900035d7870 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000ac0d000 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffc900035d7900 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc900035d7900 R13: 0000000000000cc0 R14: ffff888146a48600 R15: 0000000000000001 FS: 00007f6f37ffe6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30223000 CR3: 000000003e9b7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 28 00 sub %al,(%rax) 2: 00 00 add %al,(%rax) 4: 75 05 jne 0xb 6: 48 83 c4 28 add $0x28,%rsp a: c3 ret b: e8 e1 20 00 00 call 0x20f1 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 c7 c1 b0 ff ff ff mov $0xffffffffffffffb0,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W