WARNING: CPU: 1 PID: 28240 at mm/slab_common.c:1031 kmalloc_slab+0x56/0x70 mm/slab_common.c:1031
kobject: 'kvm' (00000000f231b1dd): kobject_uevent_env
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 28240 Comm: syz-executor4 Not tainted 4.19.0-rc6+ #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
kobject: 'kvm' (00000000f231b1dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
kobject: 'kvm' (00000000f231b1dd): kobject_uevent_env
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
kobject: 'loop2' (0000000007c36c96): kobject_uevent_env
kobject: 'loop2' (0000000007c36c96): fill_kobj_path: path = '/devices/virtual/block/loop2'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
kobject: 'kvm' (00000000f231b1dd): kobject_uevent_env
RIP: 0010:kmalloc_slab+0x56/0x70 mm/slab_common.c:1031
Code: c5 60 ab 00 89 5d c3 48 85 ff b8 10 00 00 00 74 f4 83 ef 01 c1 ef 03 0f b6 87 80 aa 00 89 eb d8 31 c0 81 e6 00 02 00 00 75 db <0f> 0b 5d c3 48 8b 04 c5 a0 aa 00 89 5d c3 66 90 66 2e 0f 1f 84 00
RSP: 0018:ffff880182157980 EFLAGS: 00010246
kobject: 'kvm' (00000000f231b1dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
RAX: 0000000000000000 RBX: 0000001500000001 RCX: ffffc90009eba000
RDX: 0000000000007c4c RSI: 0000000000000000 RDI: 0000001500000001
RBP: ffff880182157980 R08: ffff8801ba1064c0 R09: 000000008a89c642
R10: 00000000eef6c931 R11: 0000000000000000 R12: fffffffffffffff4
R13: ffff8801c3ec6a00 R14: ffff8801c3ec6a00 R15: 0000000000608040
 __do_kmalloc mm/slab.c:3713 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3727
kobject: 'kvm' (00000000f231b1dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 kmalloc include/linux/slab.h:518 [inline]
 kzalloc include/linux/slab.h:707 [inline]
 __v9fs_get_acl+0xc5/0x170 fs/9p/acl.c:36
 v9fs_get_acl+0xe5/0x2a0 fs/9p/acl.c:70
 v9fs_mount+0x636/0x8f0 fs/9p/vfs_super.c:191
 mount_fs+0xae/0x31d fs/super.c:1261
 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961
kobject: 'kvm' (00000000f231b1dd): kobject_uevent_env
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2457 [inline]
 do_mount+0x581/0x31f0 fs/namespace.c:2787
kobject: 'kvm' (00000000f231b1dd): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop2' (0000000007c36c96): kobject_uevent_env
kobject: 'loop2' (0000000007c36c96): fill_kobj_path: path = '/devices/virtual/block/loop2'
 ksys_mount+0x12d/0x140 fs/namespace.c:3003
 __do_sys_mount fs/namespace.c:3017 [inline]
 __se_sys_mount fs/namespace.c:3014 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3014
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457579
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff2f67ffc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579
RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 000000000072bf00 R08: 0000000020000380 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2f68006d4
R13: 00000000004c28b5 R14: 00000000004d3c90 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..