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 Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 6634 Comm: syz-executor5 Not tainted 4.9.43-ge63ae19 #26 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c740b000 task.stack: ffff8801aa548000 RIP: 0010:[] [] loop_set_fd drivers/block/loop.c:894 [inline] RIP: 0010:[] [] lo_ioctl+0x5a8/0x1990 drivers/block/loop.c:1340 RSP: 0018:ffff8801aa54fb48 EFLAGS: 00010206 RAX: 0000000000000036 RBX: dffffc0000000000 RCX: ffffc90003d0f000 RDX: 0000000000000054 RSI: 0000000000000002 RDI: 00000000000001b0 RBP: ffff8801aa54fbc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 1ffff100354a9f26 R12: 0000000000000000 R13: ffff8801d57a0000 R14: 0000000000000000 R15: ffff8801d9c16d40 FS: 00007fa8fb125700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff5082aff0 CR3: 00000001aa723000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff81bd8b8c ffffffff81bd8872 0000000000006000 ffff8801d57a0150 0000000000700000 ffff8801d9c16540 ffff8801d9c16350 ffff8801d9963600 ffff8801d9c16e20 000000000002001d ffff8801d57a0158 ffff8801d9c16d40 Call Trace: [] __blkdev_driver_ioctl block/ioctl.c:294 [inline] [] blkdev_ioctl+0x4aa/0x1a60 block/ioctl.c:590 [] block_ioctl+0xde/0x120 fs/block_dev.c:1686 [] vfs_ioctl fs/ioctl.c:43 [inline] [] do_vfs_ioctl+0x1aa/0x10c0 fs/ioctl.c:679 [] SYSC_ioctl fs/ioctl.c:694 [inline] [] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Code: 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 ee 12 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b0 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 e4 12 00 00 4d 8b a4 24 b0 01 00 00 4c 89 e0 RIP [] loop_set_fd drivers/block/loop.c:894 [inline] RIP [] lo_ioctl+0x5a8/0x1990 drivers/block/loop.c:1340 RSP ---[ end trace 85a6d9e92ec53fb2 ]--- Kernel panic - not syncing: Fatal exception TCP: tcp_parse_options: Illegal window scaling value 255 >14 received Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..