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: 496 Comm: syz-executor.4 Not tainted 5.15.147-syzkaller-1068928-g1c3a1f32bcbd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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 6d d1 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:ffffc900010c7580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888112802780 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900010c7500 RBP: ffffc900010c7650 R08: dffffc0000000000 R09: fffff52000218ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888112644030 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888112644030 FS: 00007f776e99b6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffbca375d58 CR3: 00000001268bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_attach+0x17/0x20 drivers/base/dd.c:1022 proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2354 usbdev_ioctl+0x305b/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: 0033:0x7f776ee18859 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:00007f776e99b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f776ef37f80 RCX: 00007f776ee18859 RDX: 0000000020000040 RSI: 00000000c00c5512 RDI: 0000000000000006 RBP: 00007f776ee74ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f776ef37f80 R15: 00007ffd6f13dc68 Modules linked in: ---[ end trace d385108d14a8bdd1 ]--- 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 6d d1 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:ffffc900010c7580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888112802780 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc900010c7500 RBP: ffffc900010c7650 R08: dffffc0000000000 R09: fffff52000218ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888112644030 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888112644030 FS: 00007f776e99b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f776e97ad58 CR3: 00000001268bb000 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 cd 6d d1 fe call 0xfed16de6 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