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: 19659 Comm: syz-executor.4 Not tainted 5.15.122-syzkaller-00676-g1463976ddc64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:__device_attach+0xb4/0x510 drivers/base/dd.c:955 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 cd 1a d2 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 c8 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc900000a7580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88815f2f13c0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900000a7500 RBP: ffffc900000a7650 R08: dffffc0000000000 R09: fffff52000014ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881186ed830 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881186ed830 FS: 00007f8cd92746c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8cda606728 CR3: 0000000128e5b000 CR4: 00000000003506a0 Call Trace: device_attach+0x17/0x20 drivers/base/dd.c:1022 proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2354 usbdev_ioctl+0x3070/0x5e20 drivers/usb/core/devio.c:2805 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f8cda4f1ae9 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:00007f8cd92740c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8cda610f80 RCX: 00007f8cda4f1ae9 RDX: 00000000200000c0 RSI: 00000000c0105512 RDI: 0000000000000003 RBP: 00007f8cda53d47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8cda610f80 R15: 00007ffd76c16048 Modules linked in: ---[ end trace ec0c61448940971e ]--- RIP: 0010:__device_attach+0xb4/0x510 drivers/base/dd.c:955 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 cd 1a d2 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 c8 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffffc900000a7580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88815f2f13c0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900000a7500 RBP: ffffc900000a7650 R08: dffffc0000000000 R09: fffff52000014ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881186ed830 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881186ed830 FS: 00007f8cd92746c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa169affd58 CR3: 0000000128e5b000 CR4: 00000000003506b0 ---------------- 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 cd 1a d2 fe call 0xfed21ae6 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 c8 03 00 00 jne 0x3ff 37: 0f b6 1b movzbl (%rbx),%ebx 3a: 89 de mov %ebx,%esi 3c: 83 e6 01 and $0x1,%esi 3f: 45 rex.RB