kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access isofs_fill_super: bread failed, dev=loop2, iso_blknum=56, block=112 ISOFS: Logical zone size(0) < hardware blocksize(1024) general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 30814 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:798 Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00 RSP: 0018:ffff88805cd57a40 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffff1100b9aaf49 RCX: 0000000000000000 RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0 RBP: ffff88805b9e3370 R08: 0000000000000000 R09: ffffed100b73c67a R10: ffff88805b9e33d7 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88805cd57c0c R14: 00000000fffffff0 R15: ffff88805b9e33d0 FS: 00007f0374099700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f44da1e5000 CR3: 00000000a049d000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: proc_ioctl+0x526/0x630 drivers/usb/core/devio.c:2192 proc_ioctl_default drivers/usb/core/devio.c:2227 [inline] usbdev_do_ioctl+0x2773/0x3030 drivers/usb/core/devio.c:2541 usbdev_ioctl+0x21/0x30 drivers/usb/core/devio.c:2585 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0376b23ae9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0374099188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0376c36f60 RCX: 00007f0376b23ae9 RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000004 RBP: 00007f0376b7df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffde7a7eff R14: 00007f0374099300 R15: 0000000000022000 Modules linked in: ---[ end trace 3e11e69fc4e2cfeb ]--- RIP: 0010:__device_attach+0xaa/0x470 drivers/base/dd.c:798 Code: e8 03 42 80 3c 20 00 0f 85 77 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 08 49 8d bc 24 d0 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 42 03 00 00 45 0f b6 b4 24 d0 00 00 RSP: 0018:ffff88805cd57a40 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffff1100b9aaf49 RCX: 0000000000000000 RDX: 000000000000001a RSI: 0000000000000008 RDI: 00000000000000d0 RBP: ffff88805b9e3370 R08: 0000000000000000 R09: ffffed100b73c67a R10: ffff88805b9e33d7 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88805cd57c0c R14: 00000000fffffff0 R15: ffff88805b9e33d0 FS: 00007f0374099700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f44d764afe8 CR3: 00000000a049d000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 03 42 80 3c callq 0x3c804208 5: 20 00 and %al,(%rax) 7: 0f 85 77 03 00 00 jne 0x384 d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 14: fc ff df 17: 4c 8b 65 08 mov 0x8(%rbp),%r12 1b: 49 8d bc 24 d0 00 00 lea 0xd0(%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 42 03 00 00 jle 0x37a 38: 45 rex.RB 39: 0f .byte 0xf 3a: b6 b4 mov $0xb4,%dh 3c: 24 d0 and $0xd0,%al