ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 376 Comm: syz-executor921 Not tainted 5.4.242-syzkaller-00065-g10e0626a3202 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:__device_attach+0xb4/0x490 drivers/base/dd.c:909 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 3d 32 fd fe 4c 8b 2b 49 8d 9d c8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 51 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffff8881dbe779c0 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 00000000000000c8 RCX: ffffffff844f0c25 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881dbe77940 RBP: ffff8881dbe77a90 R08: dffffc0000000000 R09: ffffed103b7cef29 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dc493030 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000555555b75300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e3b9542a4 CR3: 00000001dc3a0000 CR4: 00000000003406a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: proc_ioctl+0x441/0x610 drivers/usb/core/devio.c:2259 proc_ioctl_default+0xb9/0xf0 drivers/usb/core/devio.c:2294 usbdev_do_ioctl+0x13e5/0x1e40 drivers/usb/core/devio.c:2650 usbdev_ioctl+0x1e/0x30 drivers/usb/core/devio.c:2710 do_vfs_ioctl+0x742/0x1720 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:742 [inline] __do_sys_ioctl fs/ioctl.c:749 [inline] __se_sys_ioctl fs/ioctl.c:747 [inline] __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 Modules linked in: ---[ end trace 741c69ad8305fde0 ]--- RIP: 0010:__device_attach+0xb4/0x490 drivers/base/dd.c:909 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 3d 32 fd fe 4c 8b 2b 49 8d 9d c8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 51 03 00 00 0f b6 1b 89 de 83 e6 01 45 RSP: 0018:ffff8881dbe779c0 EFLAGS: 00010202 RAX: 0000000000000019 RBX: 00000000000000c8 RCX: ffffffff844f0c25 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881dbe77940 RBP: ffff8881dbe77a90 R08: dffffc0000000000 R09: ffffed103b7cef29 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dc493030 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 0000555555b75300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e3b9542a4 CR3: 00000001dc3a0000 CR4: 00000000003406a0 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 3d 32 fd fe callq 0xfefd3256 19: 4c 8b 2b mov (%rbx),%r13 1c: 49 8d 9d c8 00 00 00 lea 0xc8(%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 51 03 00 00 jne 0x388 37: 0f b6 1b movzbl (%rbx),%ebx 3a: 89 de mov %ebx,%esi 3c: 83 e6 01 and $0x1,%esi 3f: 45 rex.RB