panic: chgproccnt: procs < 0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 147847 54806 60929 0x10 0 0 syz-executor * 62749 54806 60929 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834389d0) at panic+0x1e5 sys/kern/subr_prf.c:198 chgproccnt(ee00,ffffffff) at chgproccnt+0xcc sys_setuid(ffff8000373ecd20,ffff80003c427e90,ffff80003c427de0) at sys_setuid+0x2d9 sys/kern/kern_prot.c:746 syscall(ffff80003c427e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c427e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18d90e75c90, 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 *cpu1: chgproccnt: procs < 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834389d0) at panic+0x1e5 sys/kern/subr_prf.c:198 chgproccnt(ee00,ffffffff) at chgproccnt+0xcc sys_setuid(ffff8000373ecd20,ffff80003c427e90,ffff80003c427de0) at sys_setuid+0x2d9 sys/kern/kern_prot.c:746 syscall(ffff80003c427e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c427e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18d90e75c90, count: -6 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c427c60 rbx 0xffff8000299eee07 rdx 0 rcx 0xffff8000373ecd20 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb86a3f6b91da06d1 r11 0x7bcb78331b4c10db r12 0xffff8000299eec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8170d335 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c427c50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=62749 pid=54806 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000373ec028,0xffffffff8399a558 process=0xffff80002a3cdcf8 user=0xffff80003c422000, vmspace=0xfffffd8068bb87c0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54806 147847 81562 60929 7 0x10 syz-executor 54806 213302 81562 60929 2 0x4000010 syz-executor 54806 60033 81562 60929 2 0x4000010 syz-executor *54806 62749 81562 60929 7 0x4000010 syz-executor 4483 394503 78352 0 2 0 syz-executor 4483 337716 78352 0 3 0x4000080 fsleep syz-executor 7395 24967 20693 0 2 0 syz-executor 7395 95744 20693 0 3 0x4000080 fsleep syz-executor 7395 297841 20693 0 3 0x4000080 fsleep syz-executor 7395 3158 20693 0 2 0x4000000 syz-executor 39249 340216 97033 0 2 0 syz-executor 39249 427998 97033 0 3 0x4000080 fsleep syz-executor 87563 486917 37651 0 3 0x80 nanoslp syz-executor 87563 344697 37651 0 3 0x4000080 fsleep syz-executor 87563 362478 37651 0 3 0x4000080 ttyin syz-executor 3375 25774 51322 0 3 0x80 nanoslp syz-executor 3375 90186 51322 0 3 0x4000080 kqsel syz-executor 3375 167990 51322 0 3 0x4000080 fsleep syz-executor 81562 88481 78799 0 3 0x82 nanoslp syz-executor 37651 261504 78799 0 3 0x82 nanoslp syz-executor 51322 337561 78799 0 3 0x82 nanoslp syz-executor 61082 497767 78799 0 3 0x82 nanoslp syz-executor 87246 378063 78799 0 2 0x2 syz-executor 20693 321012 78799 0 3 0x82 nanoslp syz-executor 78352 276631 78799 0 3 0x82 nanoslp syz-executor 97033 272034 78799 0 3 0x82 nanoslp syz-executor 78799 69835 51132 0 3 0x82 kqread syz-executor 51132 448247 34775 0 3 0x10008a sigsusp ksh 34775 327701 76392 0 3 0x98 kqread sshd-session 76392 158774 6777 0 3 0x92 kqread sshd-session 82118 473796 1 0 3 0x100083 ttyopn getty 6777 393543 1 0 3 0x88 kqread sshd 2313 208023 51931 74 3 0x1100092 bpf pflogd 51931 30342 1 0 3 0x80 sbwait pflogd 36917 290778 12069 73 3 0x1100090 kqread syslogd 12069 264377 1 0 3 0x100082 sbwait syslogd 12602 286886 1 0 3 0x100080 kqread resolvd 51300 67405 30556 77 3 0x100092 kqread dhcpleased 83543 68517 30556 77 3 0x100092 kqread dhcpleased 30556 389818 1 0 3 0x80 kqread dhcpleased 73708 176683 0 0 3 0x14200 bored smr 48648 477215 0 0 2 0x14200 zerothread 51881 503068 0 0 3 0x14200 aiodoned aiodoned 57608 463884 0 0 3 0x14200 syncer update 15328 208376 0 0 3 0x14200 cleaner cleaner 74579 426724 0 0 3 0x14200 reaper reaper 24115 34393 0 0 3 0x14200 pgdaemon pagedaemon 59673 50064 0 0 3 0x14200 bored viomb 27948 129392 0 0 3 0x40014200 acpi0 acpi0 54553 425862 0 0 3 0x40014200 idle1 34498 392288 0 0 3 0x14200 bored softnet1 40817 362071 0 0 3 0x14200 bored softnet0 22567 269031 0 0 3 0x14200 bored systqmp 38612 25894 0 0 3 0x14200 bored systq 50732 230160 0 0 3 0x14200 tmoslp softclockmp 3786 266645 0 0 3 0x40014200 tmoslp softclock 42444 481627 0 0 3 0x40014200 idle0 1 232292 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 54806 (syz-executor) thread 0xffff8000373ec028 (60033) exclusive rrwlock inode r = 0 (0xfffffd8068c5bec0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dofchmodat+0x162 sys/kern/vfs_syscalls.c:2382 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 54806 (syz-executor) thread 0xffff8000373ecd20 (62749) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8397f0f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:175 #3 uid_find+0xab sys/kern/kern_proc.c:136 #4 chgproccnt+0x39 sys/kern/kern_proc.c:-1 #5 sys_setuid+0x2d9 sys/kern/kern_prot.c:746 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 Process 87246 (syz-executor) thread 0xffff80002a272d08 (378063) exclusive rwlock vmmaplk r = 0 (0xfffffd8068bb8c90) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3741 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b0634d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3732 #4 process_new+0x577 sys/kern/kern_fork.c:281 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11026K 11285K 166960K 11563 0 pcb 18 12K 12K 166960K 45 0 rtable 257 10K 11K 166960K 402 0 pf 38 18K 22K 166960K 76 0 ifaddr 43 7K 7K 166960K 54 0 ifgroup 55 2K 2K 166960K 71 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1532 0 iov 0 0K 16K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 1538 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 346 0 sigio 0 0K 0K 166960K 3 0 proc 76 131K 196K 166960K 563 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 17 0 in_multi 99 7K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 404 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 152K 166K 166960K 5207 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 43 86K 106K 166960K 1510 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 12 0K 2K 166960K 35 0 temp 40 8667K 8733K 166960K 5223 0 kqueue 17 25K 29K 166960K 64 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 54 0 51 1 0 1 1 0 8 0 rtentry 176 113 0 1 6 0 6 6 0 8 0 unpcb 144 323 0 305 6 0 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 155 0 148 7 6 1 7 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 299 0 287 8 6 2 7 0 8 1 nd6 152 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 14 0 14 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 4 1 0 1 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 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 33 0 0 1 0 1 1 0 8 0 pfstkey 128 33 0 0 2 0 2 2 0 8 0 pfstate 448 33 0 0 4 0 4 4 0 8 0 pfrule 1344 24 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 460 0 0 29 0 29 29 0 8 0 art_table 40 461 0 0 5 0 5 5 0 8 0 art_node 32 113 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 1964 0 452 95 0 95 95 0 8 0 ffsino 296 1964 0 452 117 0 117 117 0 8 0 nchpl 144 2455 0 759 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 2139 0 0 119 0 119 119 0 8 0 namei 1024 8122 0 8121 5 2 3 3 0 8 2 percpumem 16 64 0 15 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 40 0 14 3 0 3 3 0 8 1 scxspl 216 8229 0 8229 10 2 8 8 1 8 8 plimitpl 152 50 0 30 1 0 1 1 0 8 0 sigapl 424 666 0 618 7 1 6 7 0 8 0 knotepl 120 314 0 0 10 0 10 10 0 8 0 kqueuepl 224 92 0 79 2 0 2 2 0 8 0 pipepl 344 210 0 183 9 0 9 9 0 8 6 fdescpl 528 650 0 618 3 0 3 3 0 8 0 filepl 160 3429 0 3198 18 3 15 15 0 8 5 lockfpl 104 69 0 67 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 354 0 338 1 0 1 1 0 8 0 zombiepl 144 717 0 716 2 1 1 1 0 8 0 processpl 1232 666 0 618 5 1 4 5 0 8 0 procpl 664 1075 0 1015 7 1 6 6 0 8 0 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 752 678 0 645 24 7 17 17 0 8 13 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 162 0 0 10 0 10 10 0 8 0 bufpl 280 2695 0 131 184 0 184 184 0 8 0 anonpl 32 4623 0 0 38 0 38 38 0 246 0 amapchunkpl 152 15758 0 15253 30 2 28 28 0 158 8 amappl16 200 2159 0 2129 6 3 3 6 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 440 0 439 1 0 1 1 0 8 0 amappl12 168 1021 0 979 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 252 0 251 1 0 1 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 98 0 97 1 0 1 1 0 8 0 amappl6 120 282 0 268 1 0 1 1 0 8 0 amappl5 112 96 0 86 1 0 1 1 0 8 0 amappl4 104 428 0 398 1 0 1 1 0 8 0 amappl3 96 2595 0 2500 4 1 3 3 0 8 0 amappl2 88 770 0 690 2 0 2 2 0 8 0 amappl1 80 10060 0 9470 15 2 13 15 0 8 0 amappl 88 4425 0 4256 5 0 5 5 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 0 8 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 128 255 0 255 2 1 1 1 0 8 1 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 72 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 650 0 618 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 650 0 618 1 0 1 1 0 8 0 vmmpekpl 168 7400 0 7370 3 0 3 3 0 8 0 vmmpepl 168 48631 0 46694 89 2 87 88 0 357 1 vmsppl 488 649 0 618 5 1 4 5 0 8 0 rwobjpl 80 16243 0 15195 24 0 24 24 0 8 0 pdppl 4096 1308 0 1236 106 34 72 88 0 8 0 pvpl 32 11348 0 0 92 0 92 92 0 265 0 pmappl 256 649 0 618 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 288 0 45 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83867ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 dorefreshcreds(ffff80002a3cdcf8,ffff80003c409cb8) at dorefreshcreds+0x31 sys/kern/kern_prot.c:1177 syscall(ffff80003c449380) at syscall+0x1cb refreshcreds sys/sys/proc.h:613 [inline] syscall(ffff80003c449380) at syscall+0x1cb mi_syscall sys/sys/syscall_mi.h:140 [inline] syscall(ffff80003c449380) at syscall+0x1cb sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d6b3143f410, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83867ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8397eee8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 dorefreshcreds(ffff80002a3cdcf8,ffff80003c409cb8) at dorefreshcreds+0x31 sys/kern/kern_prot.c:1177 syscall(ffff80003c449380) at syscall+0x1cb refreshcreds sys/sys/proc.h:613 [inline] syscall(ffff80003c449380) at syscall+0x1cb mi_syscall sys/sys/syscall_mi.h:140 [inline] syscall(ffff80003c449380) at syscall+0x1cb sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d6b3143f410, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834389d0) at panic+0x1e5 sys/kern/subr_prf.c:198 chgproccnt(ee00,ffffffff) at chgproccnt+0xcc sys_setuid(ffff8000373ecd20,ffff80003c427e90,ffff80003c427de0) at sys_setuid+0x2d9 sys/kern/kern_prot.c:746 syscall(ffff80003c427e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c427e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18d90e75c90, count: 9 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834389d0) at panic+0x1e5 sys/kern/subr_prf.c:198 chgproccnt(ee00,ffffffff) at chgproccnt+0xcc sys_setuid(ffff8000373ecd20,ffff80003c427e90,ffff80003c427de0) at sys_setuid+0x2d9 sys/kern/kern_prot.c:746 syscall(ffff80003c427e90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c427e90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18d90e75c90, count: -6