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 *434380 13858 0 0x2 0x1 0 syz-executor.1 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(ffffffff821e690c,ffffffff821f7f3b,149,ffffffff821c1398) at __assert+0x2b sys/kern/subr_prf.c:154 buf_free_pages(fffffd8037d61800) at buf_free_pages+0x1ee sys/kern/vfs_biomem.c:318 buf_dealloc_mem(fffffd8037d61800) at buf_dealloc_mem+0xe1 sys/kern/vfs_biomem.c:194 buf_put(fffffd8037d61800) at buf_put+0x16b sys/kern/vfs_bio.c:131 brelse(fffffd8037d61800) at brelse+0x257 sys/kern/vfs_bio.c:922 ffs_indirtrunc(fffffd80373642d8,fffffffffffffff4,2b280,ffffffffffffffff,0,ffff8000173a56d0) at ffs_indirtrunc+0x827 ffs_truncate(fffffd80373642d8,0,0,ffffffffffffffff) at ffs_truncate+0xf87 sys/ufs/ffs/ffs_inode.c:337 ufs_inactive(ffff8000173a5828) at ufs_inactive+0x159 sys/ufs/ufs/ufs_inode.c:85 VOP_INACTIVE(fffffd802c2135b8,ffff8000159349f8) at VOP_INACTIVE+0xaa sys/kern/vfs_vops.c:573 vput(fffffd802c2135b8) at vput+0xae sys/kern/vfs_subr.c:768 ktrwriteraw(ffff8000159349f8,fffffd802c2135b8,fffffd803f7c67e0,ffff8000173a59b0,ffff8000173a5990) at ktrwriteraw+0x1fd sys/kern/kern_ktrace.c:669 ktrstruct(ffff8000159349f8,ffffffff821a11fd,ffff8000173a5a68,10) at ktrstruct+0x163 ktrwrite2 sys/kern/kern_ktrace.c:620 [inline] ktrstruct(ffff8000159349f8,ffffffff821a11fd,ffff8000173a5a68,10) at ktrstruct+0x163 sys/kern/kern_ktrace.c:306 end trace frame: 0xffff8000173a5ac0, count: 0 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.