witness: userret: returning with the following locks held: exclusive rwlock netlock r = 0 (0xffffffff82748670) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 pfioctl+0x1fc7 #2 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:297 #3 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4b0 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:591 #6 Xsyscall+0x128 panic: witness_warn Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *333788 37853 0 0 0x4000000 1 syz-executor.1 433534 45521 73 0x100010 0 0 syslogd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823becb8) at panic+0x15e sys/kern/subr_prf.c:218 witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f witness_debugger sys/kern/subr_witness.c:2493 [inline] witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f sys/kern/subr_witness.c:1455 userret(ffff8000212a8a58) at userret+0x337 sys/kern/kern_sig.c:1932 syscall(ffff800023327da0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800023327da0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:613 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40e30f04ad0, count: 9 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic witness_warn ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823becb8) at panic+0x15e sys/kern/subr_prf.c:218 witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f witness_debugger sys/kern/subr_witness.c:2493 [inline] witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f sys/kern/subr_witness.c:1455 userret(ffff8000212a8a58) at userret+0x337 sys/kern/kern_sig.c:1932 syscall(ffff800023327da0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800023327da0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:613 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40e30f04ad0, count: -6 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800023327af0 rbx 0xffff800023327b00 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff821a7fd6 kprintf+0x146 r9 0x1 r10 0x9843857524394d17 r11 0x5225d54f978b5ca4 r12 0x3000000008 r13 0xffff800023327ba0 r14 0x100 r15 0x1 rip 0xffffffff81213b78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023327ae0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=333788 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a87c8,0xffffffff82893308 process=0xffff80002125f5b0 user=0xffff800023322000, vmspace=0xfffffd8008462730 estcpu=36, cpticks=4, pctcpu=0.0 user=0, sys=4, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37853 166997 70556 0 2 0 syz-executor.1 *37853 333788 70556 0 7 0x4000000 syz-executor.1 28221 260002 41892 0 2 0 syz-executor.0 28221 317825 41892 0 3 0x4000080 lockf syz-executor.0 41892 439186 94054 0 3 0x82 nanosleep syz-executor.0 69664 473605 1 0 3 0x100083 ttyin getty 22119 412972 0 0 3 0x14200 bored sosplice 70556 411613 94054 0 2 0x482 syz-executor.1 94054 521083 22540 0 3 0x82 thrsleep syz-fuzzer 94054 251495 22540 0 3 0x4000082 thrsleep syz-fuzzer 94054 266184 22540 0 3 0x4000082 thrsleep syz-fuzzer 94054 511567 22540 0 3 0x4000082 thrsleep syz-fuzzer 94054 309988 22540 0 3 0x4000082 thrsleep syz-fuzzer 94054 83518 22540 0 3 0x4000082 kqread syz-fuzzer 94054 524234 22540 0 3 0x4000082 thrsleep syz-fuzzer 94054 322826 22540 0 3 0x4000082 thrsleep syz-fuzzer 22540 309284 12496 0 3 0x10008a pause ksh 12496 511924 19717 0 3 0x92 select sshd 19717 503557 1 0 3 0x80 select sshd 34345 89283 81495 74 3 0x100092 bpf pflogd 81495 155338 1 0 3 0x80 netio pflogd 45521 433534 55582 73 7 0x100010 syslogd 55582 224281 1 0 3 0x100082 netio syslogd 18416 309143 1 77 3 0x100090 poll dhclient 48928 426704 1 0 3 0x80 poll dhclient 165 84153 0 0 3 0x14200 bored smr 61614 349446 0 0 2 0x14200 zerothread 72118 207837 0 0 3 0x14200 aiodoned aiodoned 94294 153553 0 0 3 0x14200 syncer update 18010 24295 0 0 3 0x14200 cleaner cleaner 70310 368417 0 0 3 0x14200 reaper reaper 64478 435637 0 0 3 0x14200 pgdaemon pagedaemon 38346 431936 0 0 3 0x14200 bored crynlk 38254 58656 0 0 3 0x14200 bored crypto 6965 61599 0 0 3 0x14200 bored viomb 9357 323937 0 0 3 0x40014200 acpi0 acpi0 56724 52210 0 0 3 0x40014200 idle1 19004 512271 0 0 3 0x14200 bored softnet 12001 513418 0 0 3 0x14200 bored systqmp 32592 96321 0 0 3 0x14200 bored systq 7882 209828 0 0 3 0x40014200 netlock softclock 55849 467255 0 0 3 0x40014200 idle0 1 142857 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 37853 (syz-executor.1) thread 0xffff8000212a8a58 (333788) exclusive rwlock netlock r = 0 (0xffffffff82748670) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 pfioctl+0x1fc7 #2 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:297 #3 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #4 sys_ioctl+0x4b0 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:591 #6 Xsyscall+0x128 Process 45521 (syslogd) thread 0xffff8000ffff6530 (433534) exclusive rrwlock inode r = 0 (0xfffffd806ec5ea28) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 sys_fsync+0x113 sys/kern/vfs_syscalls.c:2887 #6 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:591 #7 Xsyscall+0x128 Process 7882 (softclock) thread 0xffff8000211891f0 (209828) shared rwlock timeout r = 0 (0xffffffff826cb560) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_thread+0x124 sys/kern/kern_timeout.c:798 #3 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9555 6441K 7289K 78643K 14168 0 pcb 13 8K 8K 78643K 154 0 rtable 110 4K 5K 78643K 886 0 ifaddr 85 16K 16K 78643K 273 0 counters 43 33K 34K 78643K 121 0 ioctlops 0 0K 4K 78643K 1621 0 iov 0 0K 16K 78643K 138 0 mount 1 1K 1K 78643K 1 0 vnodes 1232 77K 78K 78643K 2624 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 117 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 242 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 6 17K 25K 78643K 3164 0 sigio 0 0K 0K 78643K 5 0 proc 61 63K 95K 78643K 596 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 136 0 in_multi 33 2K 2K 78643K 161 0 ether_multi 1 0K 0K 78643K 36 0 mrt 0 0K 0K 78643K 68 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 2K 78643K 506 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 139 24K 32K 78643K 8156 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 124 0 NDP 15 0K 0K 78643K 66 0 temp 144 3965K 4031K 78643K 21597 0 kqueue 3 4K 12K 78643K 143 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 18 0 12 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 108 0 106 1 0 1 1 0 8 0 rtentry 112 141 0 97 2 0 2 2 0 8 0 unpcb 120 928 0 918 1 0 1 1 0 8 0 syncache 296 65 0 65 4 3 1 1 0 8 1 tcpqe 32 10 0 10 1 1 0 1 0 8 0 tcpcb 736 507 0 473 15 9 6 6 0 8 2 inpcb 296 1387 0 1380 6 4 2 2 0 8 1 rttmr 72 34 0 34 1 1 0 1 0 8 0 nd6 48 16 0 10 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 4 0 2 1 0 1 1 0 8 0 pfstscr 40 4 0 4 1 0 1 1 0 8 1 pffrent 40 8 0 8 1 1 0 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pftag 88 5 0 5 1 0 1 1 0 8 1 pfstitem 24 29 0 16 1 0 1 1 0 8 0 pfstkey 112 37 0 24 1 0 1 1 0 8 0 pfstate 328 33 0 20 2 0 2 2 0 8 0 pfrule 1360 112 0 90 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 396 0 204 13 0 13 13 0 8 0 art_table 32 397 0 204 2 0 2 2 0 8 0 art_node 16 140 0 102 1 0 1 1 0 8 0 sysvmsgpl 40 112 0 109 3 2 1 1 0 8 0 semapl 112 240 0 230 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6032 0 4629 91 2 89 89 0 8 0 ffsino 272 6032 0 4629 95 0 95 95 0 8 0 nchpl 144 9832 0 8241 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 25596 0 25596 1 0 1 1 0 8 1 percpumem 16 71 0 39 1 0 1 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 11 0 6 1 0 1 1 0 8 0 scxspl 216 30847 0 30847 9 8 1 8 0 8 1 plimitpl 152 200 0 192 1 0 1 1 0 8 0 sigapl 424 3377 0 3343 4 0 4 4 0 8 0 futexpl 56 24956 0 24956 1 0 1 1 0 8 1 knotepl 112 266 0 246 1 0 1 1 0 8 0 kqueuepl 152 1283 0 1281 1 0 1 1 0 8 0 pipepl 304 144 0 133 4 3 1 2 0 8 0 fdescpl 496 3360 0 3343 3 0 3 3 0 8 0 filepl 152 12670 0 12565 5 0 5 5 0 8 0 lockfpl 104 684 0 681 1 0 1 1 0 8 0 lockfspl 48 265 0 263 1 0 1 1 0 8 0 sessionpl 144 21 0 10 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 2337 0 2328 1 0 1 1 0 8 0 zombiepl 144 3343 0 3343 1 0 1 1 0 8 1 processpl 1056 3377 0 3343 3 0 3 3 0 8 0 procpl 656 7268 0 7225 7 3 4 5 0 8 0 sosppl 168 120 0 120 5 4 1 1 0 8 1 sockpl 400 2428 0 2409 4 1 3 4 0 8 1 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k 2048 162 0 0 15 0 15 15 0 8 0 mtagpl 96 194 0 0 5 0 5 5 0 8 0 mbufpl 256 590 0 0 33 0 33 33 0 8 0 bufpl 280 8747 0 2498 447 0 447 447 0 8 0 anonpl 16 251473 0 246736 32 5 27 27 0 124 7 amapchunkpl 152 13522 0 13366 16 5 11 11 0 158 4 amappl16 192 9916 0 9770 14 6 8 9 0 8 0 amappl15 184 2733 0 2731 1 0 1 1 0 8 0 amappl14 176 32 0 24 1 0 1 1 0 8 0 amappl13 168 52 0 50 1 0 1 1 0 8 0 amappl12 160 13 0 9 2 1 1 1 0 8 0 amappl11 152 58 0 43 1 0 1 1 0 8 0 amappl10 144 19 0 15 1 0 1 1 0 8 0 amappl9 136 68 0 67 1 0 1 1 0 8 0 amappl8 128 1035 0 956 3 0 3 3 0 8 0 amappl7 120 270 0 261 1 0 1 1 0 8 0 amappl6 112 80 0 66 1 0 1 1 0 8 0 amappl5 104 4121 0 4101 1 0 1 1 0 8 0 amappl4 96 301 0 272 1 0 1 1 0 8 0 amappl3 88 204 0 197 1 0 1 1 0 8 0 amappl2 80 22887 0 22808 3 1 2 3 0 8 0 amappl1 72 109063 0 108548 23 12 11 19 0 8 0 amappl 80 7582 0 7532 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 3365 0 3343 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3365 0 3343 1 0 1 1 0 8 0 vmmpekpl 168 21879 0 21846 2 0 2 2 0 8 0 vmmpepl 168 426352 0 424828 87 19 68 76 0 357 1 vmsppl 368 3364 0 3343 2 0 2 2 0 8 0 pdppl 4096 6737 0 6691 6 0 6 6 0 8 0 pvpl 32 1132582 0 1124564 138 53 85 114 0 265 18 pmappl 232 3364 0 3343 3 1 2 2 0 8 0 extentpl 40 57 0 39 1 0 1 1 0 8 0 phpool 112 294 0 15 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82700ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8289d8a0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289d8a0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff8289d8a0,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433 sleep_finish(ffff800021252820,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800021252820,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800021252820,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(fffffd806ec5f168,11,ffffffff823d9278,0) at tsleep+0x1c2 sys/kern/kern_synch.c:155 vwaitforio(fffffd806ec5f0e8,0,ffffffff823d9278,ffffffffffffffff) at vwaitforio+0x98 sys/kern/vfs_subr.c:1878 ffs_fsync(ffff800021252980) at ffs_fsync+0x39d sys/ufs/ffs/ffs_vnops.c:498 VOP_FSYNC(fffffd806ec5f0e8,fffffd807f7bfde0,1,ffff8000ffff6530) at VOP_FSYNC+0xd5 sys/kern/vfs_vops.c:362 sys_fsync(ffff8000ffff6530,ffff800021252a70,ffff800021252ac0) at sys_fsync+0x127 sys/kern/vfs_syscalls.c:2887 syscall(ffff800021252b40) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021252b40) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:591 end trace frame: 0xffff800021252bc0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82700ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff8289d8a0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289d8a0) at __mp_lock+0x129 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff8289d8a0,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:433 sleep_finish(ffff800021252820,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800021252820,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800021252820,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(fffffd806ec5f168,11,ffffffff823d9278,0) at tsleep+0x1c2 sys/kern/kern_synch.c:155 vwaitforio(fffffd806ec5f0e8,0,ffffffff823d9278,ffffffffffffffff) at vwaitforio+0x98 sys/kern/vfs_subr.c:1878 ffs_fsync(ffff800021252980) at ffs_fsync+0x39d sys/ufs/ffs/ffs_vnops.c:498 VOP_FSYNC(fffffd806ec5f0e8,fffffd807f7bfde0,1,ffff8000ffff6530) at VOP_FSYNC+0xd5 sys/kern/vfs_vops.c:362 sys_fsync(ffff8000ffff6530,ffff800021252a70,ffff800021252ac0) at sys_fsync+0x127 sys/kern/vfs_syscalls.c:2887 syscall(ffff800021252b40) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021252b40) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeced0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823becb8) at panic+0x15e sys/kern/subr_prf.c:218 witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f witness_debugger sys/kern/subr_witness.c:2493 [inline] witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f sys/kern/subr_witness.c:1455 userret(ffff8000212a8a58) at userret+0x337 sys/kern/kern_sig.c:1932 syscall(ffff800023327da0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800023327da0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:613 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40e30f04ad0, count: 9 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823becb8) at panic+0x15e sys/kern/subr_prf.c:218 witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f witness_debugger sys/kern/subr_witness.c:2493 [inline] witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f sys/kern/subr_witness.c:1455 userret(ffff8000212a8a58) at userret+0x337 sys/kern/kern_sig.c:1932 syscall(ffff800023327da0) at syscall+0x55c mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800023327da0) at syscall+0x55c sys/arch/amd64/amd64/trap.c:613 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40e30f04ad0, count: -6