__dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0x10a/0x149 lib/fault-inject.c:149
 should_failslab+0xd6/0x130 mm/failslab.c:32
------------[ cut here ]------------
 slab_pre_alloc_hook mm/slab.h:421 [inline]
 slab_alloc mm/slab.c:3376 [inline]
 kmem_cache_alloc_trace+0x29a/0x3d0 mm/slab.c:3616
WARNING: CPU: 1 PID: 20987 at fs/super.c:1163 kill_block_super+0xbe/0xe0 fs/super.c:1163
Kernel panic - not syncing: panic_on_warn set ...

 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 alloc_super fs/super.c:197 [inline]
 sget_userns+0x102/0xc10 fs/super.c:516
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x360 fs/super.c:1107
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a10 fs/namespace.c:2902
 SYSC_mount fs/namespace.c:3118 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3095
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7ff7c56a061a
RSP: 002b:00007ff7c4013f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000100 RCX: 00007ff7c56a061a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ff7c4013fe0
RBP: 00007ff7c4014020 R08: 00007ff7c4014020 R09: 0000000020000040
R10: 0000000001008410 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000020000080 R14: 00007ff7c4013fe0 R15: 0000000020000140
CPU: 1 PID: 20987 Comm: syz-executor.4 Not tainted 4.14.275-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:kill_block_super+0xbe/0xe0 fs/super.c:1163
RSP: 0000:ffff8880b4787bb0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900087fc000
RDX: 0000000000040000 RSI: ffffffff81874dee RDI: ffff8880a88b46b0
RBP: ffff8880990d8d40 R08: ffffffff8b9c99d0 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8880893b2500 R12: ffff8880a88b4200
R13: ffffffff891e2cf0 R14: ffffffff88f454c0 R15: dffffc0000000000
 qnx4_kill_sb+0x38/0x90 fs/qnx4/inode.c:239
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 sget_userns+0x9c4/0xc10 fs/super.c:537
 sget+0xd1/0x110 fs/super.c:572
 mount_bdev+0xcd/0x360 fs/super.c:1107
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a10 fs/namespace.c:2902
 SYSC_mount fs/namespace.c:3118 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3095
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f81b5fc661a
RSP: 002b:00007f81b4939f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000100 RCX: 00007f81b5fc661a
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007f81b4939fe0
RBP: 00007f81b493a020 R08: 00007f81b493a020 R09: 0000000020000040
R10: 0000000001008410 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000020000080 R14: 00007f81b4939fe0 R15: 0000000020000140
Kernel Offset: disabled
Rebooting in 86400 seconds..