panic: kernel diagnostic assertion "pg->wire_count == 1" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_biomem.c", line 329
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 79050  27069      0         0x2  0x4000000    0  syz-fuzzer
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff821defa6,ffffffff821f0a6d,149,ffffffff821ba488) at __assert+0x2b sys/kern/subr_prf.c:154
buf_free_pages(fffffd802bd2e000) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318
buf_dealloc_mem(fffffd802bd2e000) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194
buf_put(fffffd802bd2e000) at buf_put+0x16b sys/kern/vfs_bio.c:131
brelse(fffffd802bd2e000) at brelse+0x257 sys/kern/vfs_bio.c:922
vinvalbuf(fffffd802bcec4f8,2,fffffd803f7c69c0,ffff8000ffff4500,0,ffffffffffffffff) at vinvalbuf+0x3b1 sys/kern/vfs_subr.c:1977
ffs_truncate(fffffd803b8513c8,0,4,fffffd803f7c69c0) at ffs_truncate+0xeb1 sys/ufs/ffs/ffs_inode.c:326
ufs_rmdir(ffff8000148e6b88) at ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1357
VOP_RMDIR(fffffd8036c388f8,fffffd802bcec4f8,ffff8000148e6c88) at VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
dounlinkat(ffff8000ffff4500,e,c001fe68a8,8) at dounlinkat+0x14c sys/kern/vfs_syscalls.c:1818
syscall(ffff8000148e6e00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,145,c00002a000,145,38,9622ee) at Xsyscall+0x128
end of kernel
end trace frame: 0xc002821658, count: 1
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