general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] CPU: 1 PID: 14569 Comm: syz-executor.4 Not tainted 5.17.0-rc7-syzkaller-00068-ge7e19defa575 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__device_attach+0xad/0x4a0 drivers/base/dd.c:949 Code: e8 03 42 80 3c 20 00 0f 85 a3 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 48 49 8d bc 24 08 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 6e 03 00 00 45 0f b6 b4 24 08 01 00 RSP: 0018:ffffc90010a87b98 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 1ffff92002150f74 RCX: 0000000000000000 RDX: 0000000000000021 RSI: 0000000000000008 RDI: 0000000000000108 RBP: ffff88807829d030 R08: 0000000000000000 R09: ffffc90010a87ad7 R10: fffff52002150f5a R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000fffffff0 R15: ffff88807829d140 FS: 00007f7048b3e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f704a2dd090 CR3: 0000000074ae3000 CR4: 0000000000350ee0 Call Trace: proc_ioctl.part.0+0x48e/0x560 drivers/usb/core/devio.c:2340 proc_ioctl drivers/usb/core/devio.c:170 [inline] proc_ioctl_compat drivers/usb/core/devio.c:2389 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2705 [inline] usbdev_ioctl+0xc01/0x36c0 drivers/usb/core/devio.c:2791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f704a1c9049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f7048b3e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f704a2dbf60 RCX: 00007f704a1c9049 RDX: 0000000020000000 RSI: 00000000c00c5512 RDI: 0000000000000003 RBP: 00007f704a22308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc683ba24f R14: 00007f7048b3e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__device_attach+0xad/0x4a0 drivers/base/dd.c:949 Code: e8 03 42 80 3c 20 00 0f 85 a3 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 48 49 8d bc 24 08 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 6e 03 00 00 45 0f b6 b4 24 08 01 00 RSP: 0018:ffffc90010a87b98 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 1ffff92002150f74 RCX: 0000000000000000 RDX: 0000000000000021 RSI: 0000000000000008 RDI: 0000000000000108 RBP: ffff88807829d030 R08: 0000000000000000 R09: ffffc90010a87ad7 R10: fffff52002150f5a R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 00000000fffffff0 R15: ffff88807829d140 FS: 00007f7048b3e700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0b074ee1b8 CR3: 0000000074ae3000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: e8 03 42 80 3c callq 0x3c804208 5: 20 00 and %al,(%rax) 7: 0f 85 a3 03 00 00 jne 0x3b0 d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 14: fc ff df 17: 4c 8b 65 48 mov 0x48(%rbp),%r12 1b: 49 8d bc 24 08 01 00 lea 0x108(%r12),%rdi 22: 00 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 06 je 0x38 32: 0f 8e 6e 03 00 00 jle 0x3a6 38: 45 rex.RB 39: 0f .byte 0xf 3a: b6 b4 mov $0xb4,%dh 3c: 24 08 and $0x8,%al 3e: 01 00 add %eax,(%rax)