9pnet_virtio: no channels available for device trans=fd,
WARNING: CPU: 1 PID: 7340 at mm/slab_common.c:1031 kmalloc_slab+0x56/0x70 mm/slab_common.c:1031
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7340 Comm: syz-executor4 Not tainted 4.19.0-rc8+ #71
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __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
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
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:ffff8801838bf980 EFLAGS: 00010246
kobject: 'loop5' (0000000025a3f188): kobject_uevent_env
RAX: 0000000000000000 RBX: 0000010000000100 RCX: ffffc90009f40000
RDX: 000000000001b958 RSI: 0000000000000000 RDI: 0000010000000100
RBP: ffff8801838bf980 R08: ffff8801b3d8e440 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8801b3d8e440 R12: fffffffffffffff4
R13: ffff8801c20a5c00 R14: ffff8801c20a5c00 R15: 0000000000608040
 __do_kmalloc mm/slab.c:3713 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3727
kobject: 'loop5' (0000000025a3f188): fill_kobj_path: path = '/devices/virtual/block/loop5'
 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+0xf7/0x2a0 fs/9p/acl.c:71
 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
 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: 'loop0' (0000000079e4a56b): kobject_uevent_env
kobject: 'loop0' (0000000079e4a56b): fill_kobj_path: path = '/devices/virtual/block/loop0'
 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: 0033:0x457569
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd7c0b9cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569
RDX: 00000000200003c0 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 000000000072bf00 R08: 00000000200004c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd7c0b9d6d4
R13: 00000000004c28a1 R14: 00000000004d3c90 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..