general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7] CPU: 1 PID: 404 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:__device_attach+0xb8/0x4b0 drivers/base/dd.c:1006 Code: 5c 24 48 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 69 54 c3 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 6b 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc90002fff580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888114c453c0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90002fff500 RBP: ffffc90002fff650 R08: dffffc0000000000 R09: fffff520005ffea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811490a850 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88811490a850 FS: 00007f015406c700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00116a000 CR3: 0000000127297000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_attach+0x1b/0x20 drivers/base/dd.c:1073 proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2355 usbdev_ioctl+0x2713/0x6170 drivers/usb/core/devio.c:2806 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:856 __x64_sys_ioctl+0x7f/0x90 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f015328c0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f015406c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f01533abf80 RCX: 00007f015328c0a9 RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000003 RBP: 00007f01532e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff96ff65ff R14: 00007f015406c300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__device_attach+0xb8/0x4b0 drivers/base/dd.c:1006 Code: 5c 24 48 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 69 54 c3 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 6b 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc90002fff580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888114c453c0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90002fff500 RBP: ffffc90002fff650 R08: dffffc0000000000 R09: fffff520005ffea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811490a850 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88811490a850 FS: 00007f015406c700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00116a000 CR3: 0000000127297000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 5c pop %rsp 1: 24 48 and $0x48,%al 3: 48 89 d8 mov %rbx,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 69 54 c3 fe callq 0xfec35482 19: 4c 8b 2b mov (%rbx),%r13 1c: 49 8d 9d d0 00 00 00 lea 0xd0(%r13),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 6b 03 00 00 jne 0x3a2 37: 0f b6 1b movzbl (%rbx),%ebx 3a: 89 de mov %ebx,%esi 3c: 83 e6 01 and $0x1,%esi 3f: 45 rex.RB