Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program panic: pr_find_pagehead: mbufpl: page header missing Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0xa panic() at panic+0x147 pool_do_put(ffffff0006000100,ffffffff81ecbc58) at pool_do_put+0x339 pool_put(0,ffffff0006000100) at pool_put+0x37 m_free(ffffff0006000100) at m_free+0x12c mq_purge(ffff800000aca600) at mq_purge+0x6d switchclose(ffff8000210c3528,ffff80002110e698,ffffffff818e10a7,ffff80002110e640 ) at switchclose+0x77 spec_close(ffffffff81dfb940) at spec_close+0x271 VOP_CLOSE(ffffff006e1e9900,ffff8000210c3528,ffffff007f7c7ba0,3) at VOP_CLOSE+0x 5f vn_closefile(ffff8000210c3528,ffffff006e471170) at vn_closefile+0xfc fdrop(ffffff006e471170,ffff8000210c3528) at fdrop+0xa4 closef(ffff8000210c3528,ffffff006e994d48) at closef+0xd5 fdfree(ffff80002105f330) at fdfree+0x98 exit1(ffff80002110e960,ffff8000210c3528,ffff80002105f330) at exit1+0x22f end trace frame: 0xffff80002110e880, 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. ddb> ddb> set $lines = 0 ddb> show panic pr_find_pagehead: mbufpl: page header missing ddb> trace db_enter() at db_enter+0xa panic() at panic+0x147 pool_do_put(ffffff0006000100,ffffffff81ecbc58) at pool_do_put+0x339 pool_put(0,ffffff0006000100) at pool_put+0x37 m_free(ffffff0006000100) at m_free+0x12c mq_purge(ffff800000aca600) at mq_purge+0x6d switchclose(ffff8000210c3528,ffff80002110e698,ffffffff818e10a7,ffff80002110e640) at switchclose+0x77 spec_close(ffffffff81dfb940) at spec_close+0x271 VOP_CLOSE(ffffff006e1e9900,ffff8000210c3528,ffffff007f7c7ba0,3) at VOP_CLOSE+0x5f vn_closefile(ffff8000210c3528,ffffff006e471170) at vn_closefile+0xfc fdrop(ffffff006e471170,ffff8000210c3528) at fdrop+0xa4 closef(ffff8000210c3528,ffffff006e994d48) at closef+0xd5 fdfree(ffff80002105f330) at fdfree+0x98 exit1(ffff80002110e960,ffff8000210c3528,ffff80002105f330) at exit1+0x22f sys_exit(ffffffff81ab3003,ffff80002110e880,ffff80002110e960) at sys_exit+0x13 syscall(0) at syscall+0x3e4 Xsyscall(6,1,0,1,7f7fffff1fd0,0) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff1fc0, count: -17 ddb> show registers rdi 0xffffffff81e10dd8 kprintf_mutex rsi 0x5 rbp 0xffff80002110e450 rbx 0xffff80002110e4f0 rdx 0x3fd rcx 0 rax 0 r8 0xffff80002110e420 r9 0x8080808080808080 r10 0 r11 0xffffffff8174f9a0 x86_bus_space_io_read_1 r12 0x3000000008 r13 0xffff80002110e460 r14 0x100 r15 0xffffffff81c13cbf apollo_udma100_tim+0x4253 rip 0xffffffff81679b8a db_enter+0xa cs 0x8 rflags 0x246 rsp 0xffff80002110e450 ss 0x10 db_enter+0xa: popq %rbp ddb> show proc PROC (syz-executor1529) pid=256821 stat=onproc flags process=1008 proc=2000 pri=50, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff8000210c24c0,0xffff8000210c2980 process=0xffff80002105f330 user=0xffff800021109000, vmspace=0xffffff007f12bc60 estcpu=2, cpticks=3, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 92269 24317 56229 0 2 0 syz-executor1529 92269 296183 56229 0 3 0x4000080 fsleep syz-executor1529 56229 184095 58894 0 3 0x80 nanosleep syz-executor1529 79067 184662 58894 0 3 0x80 nanosleep syz-executor1529 58894 303198 95543 0 3 0x82 nanosleep syz-executor1529 95543 281058 10636 0 3 0x10008a pause ksh 10636 168310 76093 0 3 0x92 select sshd 94196 121686 1 0 3 0x100083 ttyin getty 76093 324165 1 0 3 0x80 select sshd 79609 491412 86175 73 3 0x100090 kqread syslogd 86175 329814 1 0 3 0x100082 netio syslogd 17870 299425 1 77 3 0x100090 poll dhclient 6644 4573 1 0 3 0x80 poll dhclient 32923 101997 0 0 2 0x14200 zerothread 9610 506004 0 0 3 0x14200 aiodoned aiodoned 41544 500091 0 0 3 0x14200 syncer update 77298 147067 0 0 3 0x14200 cleaner cleaner 32985 9534 0 0 3 0x14200 reaper reaper 38828 104275 0 0 3 0x14200 pgdaemon pagedaemon 26122 450894 0 0 3 0x14200 bored crynlk 44138 482470 0 0 3 0x14200 bored crypto 33502 211846 0 0 3 0x40014200 acpi0 acpi0 45102 375338 0 0 3 0x14200 bored softnet 49751 428803 0 0 3 0x14200 bored systqmp 24903 429017 0 0 3 0x14200 bored systq 758 266970 0 0 3 0x40014200 bored softclock 95851 33566 0 0 3 0x40014200 idle0 1 478748 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper