panic: malloc: allocation too large, type = 31, size = 4294965210 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *394114 9955 0 0 0x4000000 1 syz-executor 88076 94733 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336daca) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff8000ffff7218,ffff80003c4fcc80,ffff80003c4fcbd0) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c4fcc80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4fcc80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9601e2ce890, 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: malloc: allocation too large, type = 31, size = 4294965210 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336daca) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff8000ffff7218,ffff80003c4fcc80,ffff80003c4fcbd0) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c4fcc80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4fcc80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9601e2ce890, count: -6 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4fc8f0 rbx 0xffff800029aacdc7 rdx 0 rcx 0xffff8000ffff7218 rax 0xffff800029aabff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xea8cfd490f4fd7b3 r11 0xf4db4773d60220f2 r12 0xffff800029aacbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff8104b6f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4fc8e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=394114 pid=9955 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff7738,0xffffffff838c5338 process=0xffff8000354c2260 user=0xffff80003c4f7000, vmspace=0xfffffd806be48578 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9955 412302 86408 0 2 0 syz-executor * 9955 394114 86408 0 7 0x4000000 syz-executor 82528 260859 83375 0 3 0x80 fsleep syz-executor 82528 397828 83375 0 2 0x4000000 syz-executor 82528 15240 83375 0 2 0x4000000 syz-executor 9994 44100 5831 0 3 0x80 fsleep syz-executor 9994 392141 5831 0 3 0x4000080 sbwait syz-executor 4864 513443 46047 0 3 0x80 fsleep syz-executor 4864 101053 46047 0 3 0x4000080 fifow syz-executor 57484 159582 59090 0 3 0x80 fsleep syz-executor 57484 36195 59090 0 3 0x4000080 lockf syz-executor 57484 428210 59090 0 3 0x4000080 fsleep syz-executor 57484 516616 59090 0 3 0x4000080 lockf syz-executor 3606 128175 68927 0 3 0x80 fsleep syz-executor 3606 488963 68927 0 3 0x4000080 sbwait syz-executor 57397 397551 73189 0 3 0x80 fsleep syz-executor 57397 498917 73189 0 3 0x4000080 fifow syz-executor 44486 480584 0 0 3 0x14200 bored sosplice 86408 260615 94733 0 3 0x82 nanoslp syz-executor 5831 370802 94733 0 3 0x82 nanoslp syz-executor 59090 187579 94733 0 2 0x2 syz-executor 68927 353298 94733 0 2 0x482 syz-executor 46047 21816 94733 0 2 0x482 syz-executor 73189 328188 94733 0 2 0x482 syz-executor 83375 450148 94733 0 3 0x82 nanoslp syz-executor 40620 27085 94733 0 3 0x82 nanoslp syz-executor 94733 88076 2773 0 7 0x2 syz-executor 2773 264094 67255 0 3 0x10008a sigsusp ksh 67255 227143 60302 0 3 0x98 kqread sshd-session 60302 506691 92090 0 3 0x92 kqread sshd-session 43081 121108 1 0 3 0x100083 ttyin getty 92090 345732 1 0 3 0x88 kqread sshd 47022 197941 57551 74 3 0x1100092 bpf pflogd 57551 442072 1 0 3 0x80 sbwait pflogd 47955 342532 94378 73 3 0x1100090 kqread syslogd 94378 319155 1 0 3 0x100082 sbwait syslogd 35684 329171 1 0 3 0x100080 kqread resolvd 38280 492193 73932 77 3 0x100092 kqread dhcpleased 72479 147723 73932 77 3 0x100092 kqread dhcpleased 73932 384331 1 0 3 0x80 kqread dhcpleased 18287 261845 0 0 3 0x14200 bored smr 65574 475535 0 0 3 0x14200 pgzero zerothread 42686 354262 0 0 3 0x14200 aiodoned aiodoned 51292 461631 0 0 2 0x14600 update 21174 470580 0 0 3 0x14200 cleaner cleaner 46631 3090 0 0 3 0x14200 reaper reaper 72102 198535 0 0 3 0x14200 pgdaemon pagedaemon 23048 305215 0 0 3 0x14200 bored viomb 69543 233939 0 0 3 0x40014200 acpi0 acpi0 1887 72814 0 0 3 0x40014200 idle1 32075 96879 0 0 3 0x14200 bored softnet3 23997 509507 0 0 3 0x14200 bored softnet2 33405 395741 0 0 3 0x14200 bored softnet1 94349 308580 0 0 3 0x14200 bored softnet0 71489 84814 0 0 3 0x14200 bored systqmp 45589 102737 0 0 3 0x14200 bored systq 31425 351867 0 0 3 0x14200 tmoslp softclockmp 71209 104825 0 0 3 0x40014200 tmoslp softclock 90540 171009 0 0 3 0x40014200 idle0 1 523862 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &kq->kq_lock r = 0 (0xfffffd806ec6d010) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 kqueue_register+0x128c sys/kern/kern_event.c:1402 #4 pselregister+0x135 sys/kern/sys_generic.c:760 #5 dopselect+0x503 sys/kern/sys_generic.c:653 #6 sys_pselect+0x263 sys/kern/sys_generic.c:589 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 Process 9955 (syz-executor) thread 0xffff8000ffff7218 (394114) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8398e998) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 3606 (syz-executor) thread 0xffff8000ffff9210 (488963) exclusive rrwlock inode r = 0 (0xfffffd806ddc72e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 vn_open+0x13f sys/kern/vfs_vnops.c:140 #12 vndioctl+0xcb1 sys/dev/vnd.c:457 #13 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #14 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #15 sys_ioctl+0x5c3 #16 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #17 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11086K 11345K 166960K 11491 0 pcb 17 13K 14K 166960K 128 0 rtable 206 5K 7K 166960K 370 0 pf 36 18K 18K 166960K 60 0 ifaddr 41 7K 7K 166960K 50 0 ifgroup 55 2K 2K 166960K 64 0 sysctl 4 1K 1K 166960K 4 0 counters 64 36K 36K 166960K 70 0 ioctlops 0 0K 4K 166960K 1510 0 iov 0 0K 2K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 1559 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 332 0 sigio 0 0K 0K 166960K 5 0 proc 72 91K 140K 166960K 548 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 14 0 in_multi 95 7K 7K 166960K 105 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 421 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 236 73K 86K 166960K 4639 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 43 86K 106K 166960K 1410 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 12 0K 2K 166960K 32 0 temp 44 8636K 8726K 166960K 12881 0 kqueue 13 20K 28K 166960K 59 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 49 0 46 1 0 1 1 0 8 0 rtentry 112 115 0 19 4 0 4 4 0 8 0 unpcb 144 145 0 114 3 1 2 2 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 122 0 117 8 7 1 8 0 8 0 arp 120 19 0 2 1 0 1 1 0 8 0 inpcb 376 493 0 483 17 9 8 8 0 8 6 nd6 136 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 2 0 2 2 2 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 0 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 pfstitem 24 33 0 0 1 0 1 1 0 8 0 pfstkey 128 34 0 1 2 0 2 2 0 8 0 pfstate 376 34 0 1 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 51 29 0 29 29 0 8 2 art_table 32 460 0 51 4 0 4 4 0 8 0 art_node 16 114 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1958 0 448 95 0 95 95 0 8 0 ffsino 280 1958 0 448 109 0 109 109 0 8 0 nchpl 144 2438 0 743 63 0 63 63 0 8 0 uvmvnodes 80 2124 0 0 44 0 44 44 0 8 0 vnodes 216 2124 0 0 118 0 118 118 0 8 0 namei 1024 7540 0 7540 3 2 1 1 0 8 1 percpumem 16 49 0 3 1 0 1 1 0 8 0 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scxspl 216 7381 0 7380 3 2 1 2 1 8 0 plimitpl 152 53 0 34 1 0 1 1 0 8 0 sigapl 424 631 0 580 8 2 6 7 0 8 0 futexpl 64 3569 0 3562 1 0 1 1 0 8 0 knotepl 120 316 0 0 10 0 10 10 0 8 0 kqueuepl 216 83 0 74 1 0 1 1 0 8 0 pipepl 328 123 0 96 3 0 3 3 0 8 0 fdescpl 504 612 0 580 6 1 5 5 0 8 0 filepl 152 3073 0 2830 17 3 14 14 0 8 4 lockfpl 104 86 0 80 1 0 1 1 0 8 0 lockfspl 48 37 0 33 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 520 0 506 1 0 1 1 0 8 0 zombiepl 144 581 0 580 3 2 1 1 0 8 0 processpl 1168 631 0 580 5 1 4 5 0 8 0 procpl 656 970 0 909 7 1 6 6 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 688 692 0 648 19 9 10 10 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 153 0 0 10 0 10 10 0 8 0 bufpl 280 2623 0 129 179 0 179 179 0 8 0 anonpl 24 115419 0 111953 48 15 33 34 0 184 7 amapchunkpl 152 14467 0 13938 30 5 25 25 0 158 4 amappl16 200 2033 0 2002 9 7 2 6 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1252 0 1220 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 14 0 13 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 109 0 97 1 0 1 1 0 8 0 amappl6 120 183 0 179 1 0 1 1 0 8 0 amappl5 112 184 0 175 1 0 1 1 0 8 0 amappl4 104 310 0 292 1 0 1 1 0 8 0 amappl3 96 2568 0 2445 4 0 4 4 0 8 0 amappl2 88 635 0 573 2 0 2 2 0 8 0 amappl1 80 8234 0 7653 15 2 13 15 0 8 0 amappl 88 4255 0 4075 6 1 5 5 0 92 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 7 0 7 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 612 0 580 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 612 0 580 1 0 1 1 0 8 0 vmmpekpl 168 6608 0 6571 3 0 3 3 0 8 0 vmmpepl 168 43339 0 41419 89 4 85 86 0 357 1 vmsppl 456 611 0 580 5 1 4 5 0 8 0 rwobjpl 64 16684 0 13603 51 1 50 50 0 8 0 pdppl 4096 1232 0 1160 98 26 72 86 0 8 0 pvpl 32 13346 0 0 109 1 108 108 0 265 0 pmappl 248 611 0 580 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 285 0 43 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837ffff0) 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(ffffffff8398e790) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e790) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a3b27f0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f msleep(fffffd806ec6d000,fffffd806ec6d000,318,ffffffff833d662b,65) at msleep+0xdb sys/kern/kern_synch.c:221 kqueue_sleep(fffffd806ec6d000,ffff80002a3b2dd8) at kqueue_sleep+0x12b sys/kern/kern_event.c:1454 kqueue_scan(ffff80002a3b2ba0,8,ffff80002a3b2aa0,ffff80002a3b2dd8,ffff8000ffffd718,ffff80002a3b2d4c) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff8000ffffd718,32,77d2e9043aa0,0,0,ffff80002a3b2dd8,59534ed065a0843a,ffff8000ffffd718) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff8000ffffd718,ffff80002a3b2f20,ffff80002a3b2e70) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a3b2f20) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3b2f20) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d2e9043a50, count: 2 ddb{0}> trace x86_ipi_db(ffffffff837ffff0) 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(ffffffff8398e790) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e790) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a3b27f0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f msleep(fffffd806ec6d000,fffffd806ec6d000,318,ffffffff833d662b,65) at msleep+0xdb sys/kern/kern_synch.c:221 kqueue_sleep(fffffd806ec6d000,ffff80002a3b2dd8) at kqueue_sleep+0x12b sys/kern/kern_event.c:1454 kqueue_scan(ffff80002a3b2ba0,8,ffff80002a3b2aa0,ffff80002a3b2dd8,ffff8000ffffd718,ffff80002a3b2d4c) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff8000ffffd718,32,77d2e9043aa0,0,0,ffff80002a3b2dd8,59534ed065a0843a,ffff8000ffffd718) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff8000ffffd718,ffff80002a3b2f20,ffff80002a3b2e70) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a3b2f20) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3b2f20) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77d2e9043a50, count: -13 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(ffffffff8336daca) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff8000ffff7218,ffff80003c4fcc80,ffff80003c4fcbd0) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c4fcc80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4fcc80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9601e2ce890, count: 9 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336daca) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff8000ffff7218,ffff80003c4fcc80,ffff80003c4fcbd0) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c4fcc80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4fcc80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9601e2ce890, count: -6