general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7] CPU: 0 PID: 305 Comm: syz-executor729 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:__device_attach+0xb4/0x500 drivers/base/dd.c:903 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 ad 17 dd 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 c0 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc90000c47580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffffffff84ae3b55 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000c47500 RBP: ffffc90000c47650 R08: dffffc0000000000 R09: fffff52000188ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888118495030 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888118495030 FS: 0000555555610300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ac54101f0 CR3: 000000011e4f0000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_attach+0x17/0x20 drivers/base/dd.c:970 proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2262 usbdev_ioctl+0x306b/0x5e10 drivers/usb/core/devio.c:2713 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:739 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f6ac53e0859 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd9656b1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6ac5424184 RCX: 00007f6ac53e0859 RDX: 0000000020000080 RSI: 00000000c0105512 RDI: 0000000000000007 RBP: 00007ffd9656b1e0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd9656b1dc R14: 00007ffd9656b200 R15: 00007ffd9656b1f0 Modules linked in: ---[ end trace 51c448cbf36954a8 ]--- RIP: 0010:__device_attach+0xb4/0x500 drivers/base/dd.c:903 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 ad 17 dd 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 c0 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc90000c47580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffffffff84ae3b55 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000c47500 RBP: ffffc90000c47650 R08: dffffc0000000000 R09: fffff52000188ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888118495030 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888118495030 FS: 0000555555610300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ac54101f0 CR3: 000000011e4f0000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 5c pop %rsp 1: 24 68 and $0x68,%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 ad 17 dd fe callq 0xfedd17c6 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 c0 03 00 00 jne 0x3f7 37: 0f b6 1b movzbl (%rbx),%ebx 3a: 89 de mov %ebx,%esi 3c: 83 e6 01 and $0x1,%esi 3f: 45 rex.RB