binder: 20955:20956 BC_INCREFS_DONE u0000000000000000 no match
BUG: unable to handle kernel paging request at ffffebe000000008
PGD 0 P4D 0 
binder: 20955:20956 transaction failed 29189/-22, size 0-0 line 2852
Oops: 0000 [#1] SMP KASAN
CPU: 1 PID: 20942 Comm: syz-executor6 Not tainted 4.18.0-rc8+ #183
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:virt_to_head_page include/linux/mm.h:657 [inline]
RIP: 0010:virt_to_cache mm/slab.c:399 [inline]
RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809
binder: 20955:20962 BC_INCREFS_DONE u0000000000000000 no match
Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 
binder: 20955:20962 transaction failed 29189/-22, size 0-0 line 2852
77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 
binder: undelivered TRANSACTION_ERROR: 29189
e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 
binder: undelivered TRANSACTION_ERROR: 29189
4c 8b 6a 18 49 63 75 74 
RSP: 0018:ffff880191fdf520 EFLAGS: 00010086
RAX: ffffea0000000000 RBX: 0000000000000282 RCX: 0000000000000000
binder: 20964:20965 BC_INCREFS_DONE u0000000000000000 no match
RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff880191fdf540 R08: ffffed003b6246d7 R09: ffffed003b6246d6
R10: ffffed003b6246d6 R11: ffff8801db1236b3 R12: 0000000000000282
R13: ffffffff867ded2a R14: ffff880191fdf690 R15: ffff8801991a95c0
FS:  00007f63bd3b2700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
binder: 20964:20965 transaction failed 29189/-22, size 0-0 line 2852
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffebe000000008 CR3: 00000001c7188000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 p9_client_version net/9p/client.c:1010 [inline]
 p9_client_create+0xfea/0x1770 net/9p/client.c:1070
binder: undelivered TRANSACTION_ERROR: 29189
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 mount_fs+0xae/0x328 fs/super.c:1277
 vfs_kern_mount.part.34+0xdc/0x4e0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:1027 [inline]
 do_new_mount fs/namespace.c:2518 [inline]
 do_mount+0x581/0x30e0 fs/namespace.c:2848
 ksys_mount+0x12d/0x140 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457089
Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f63bd3b1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f63bd3b26d4 RCX: 0000000000457089
RDX: 0000000020000900 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00000000009300a0 R08: 0000000020000840 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d2310 R14: 00000000004c7a36 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: ffffebe000000008
---[ end trace 7b28b09e3ce7bece ]---
RIP: 0010:virt_to_head_page include/linux/mm.h:657 [inline]
RIP: 0010:virt_to_cache mm/slab.c:399 [inline]
RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809
Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 
RSP: 0018:ffff880191fdf520 EFLAGS: 00010086
RAX: ffffea0000000000 RBX: 0000000000000282 RCX: 0000000000000000
RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff880191fdf540 R08: ffffed003b6246d7 R09: ffffed003b6246d6
R10: ffffed003b6246d6 R11: ffff8801db1236b3 R12: 0000000000000282
R13: ffffffff867ded2a R14: ffff880191fdf690 R15: ffff8801991a95c0
FS:  00007f63bd3b2700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffebe000000008 CR3: 00000001c7188000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400