EXT4-fs (loop1): VFS: Can't find ext4 filesystem general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 7982 Comm: syz-executor.0 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 task: ffff8880a41446c0 task.stack: ffff88809a2a0000 RIP: 0010:kobject_uevent_env+0xb2/0xf30 lib/kobject_uevent.c:356 RSP: 0000:ffff88809a2a7b28 EFLAGS: 00010206 RAX: 0000000000000018 RBX: 0000000000000002 RCX: 1ffff110148289ee RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0 RBP: ffff88809c2d5d90 R08: ffffffff8b9df590 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880a41446c0 R12: 00000000000000a0 R13: dffffc0000000000 R14: ffff88809c2d5c88 R15: 00000000000000a0 FS: 00005555569af400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e92a000 CR3: 00000000a3185000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: loop_clr_fd+0x59f/0xc20 drivers/block/loop.c:1069 lo_ioctl+0x895/0x1cd0 drivers/block/loop.c:1429 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 block_ioctl+0xd9/0x120 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fb530aa1367 RSP: 002b:00007fffd4889ff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffd488a080 RCX: 00007fb530aa1367 RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fffd4889e90 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032 R13: 0000000000017c52 R14: 000000000000000e R15: 00007fffd488a0c0 Code: 03 42 80 3c 28 00 0f 85 dd 0b 00 00 4d 8b 64 24 18 4d 85 e4 0f 84 fa 0b 00 00 e8 ca e7 56 fa 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 d4 0b 00 00 49 8b 6c 24 20 48 85 ed 74 b0 RIP: kobject_uevent_env+0xb2/0xf30 lib/kobject_uevent.c:356 RSP: ffff88809a2a7b28 ---[ end trace 44ddd1fa15e64f28 ]--- ---------------- Code disassembly (best guess): 0: 03 42 80 add -0x80(%rdx),%eax 3: 3c 28 cmp $0x28,%al 5: 00 0f add %cl,(%rdi) 7: 85 dd test %ebx,%ebp 9: 0b 00 or (%rax),%eax b: 00 4d 8b add %cl,-0x75(%rbp) e: 64 24 18 fs and $0x18,%al 11: 4d 85 e4 test %r12,%r12 14: 0f 84 fa 0b 00 00 je 0xc14 1a: e8 ca e7 56 fa callq 0xfa56e7e9 1f: 49 8d 7c 24 20 lea 0x20(%r12),%rdi 24: 48 89 f8 mov %rdi,%rax 27: 48 c1 e8 03 shr $0x3,%rax * 2b: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 30: 0f 85 d4 0b 00 00 jne 0xc0a 36: 49 8b 6c 24 20 mov 0x20(%r12),%rbp 3b: 48 85 ed test %rbp,%rbp 3e: 74 b0 je 0xfffffff0