login: panic: pool_do_get: shmpl free list modified: page 0xfffffd805f6b0000; item addr 0xfffffd805f6b09a0; offset 0x0=0x0 != 0xe69bd01b505ffcd6 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *423539 81179 0 0 0x4000000 1K syz-executor 351164 46486 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8946) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83987478,1,ffff80003c455c48) at pool_do_get+0x597 sys/kern/subr_pool.c:743 pool_get(ffffffff83987478,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b03b4e8,ffff80003c455ea0,0,ffff80003c455df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b03b4e8,ffff80003c455ea0,ffff80003c455df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c455ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c455ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7553325bf10, count: 7 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: pool_do_get: shmpl free list modified: page 0xfffffd805f6b0000; item addr 0xfffffd805f6b09a0; offset 0x0=0x0 != 0xe69bd01b505ffcd6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8946) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83987478,1,ffff80003c455c48) at pool_do_get+0x597 sys/kern/subr_pool.c:743 pool_get(ffffffff83987478,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b03b4e8,ffff80003c455ea0,0,ffff80003c455df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b03b4e8,ffff80003c455ea0,ffff80003c455df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c455ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c455ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7553325bf10, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c455a70 rbx 0xffff8000299eeddf rdx 0xffff800001478ac0 rcx 0xffff80003b03b4e8 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4fdc462828c748a7 r11 0xfe07c0507f924dae r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff81031f25 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c455a60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=423539 pid=81179 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b03ba18,0xffff80003b03b790 process=0xffff80002a2a5390 user=0xffff80003c450000, vmspace=0xfffffd806b9d73e8 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48582 203714 52276 0 2 0 syz-executor 48582 6352 52276 0 3 0x4000080 fsleep syz-executor 933 475596 13961 0 2 0 syz-executor 933 91486 13961 0 3 0x4000080 fsleep syz-executor 81179 109944 2664 0 2 0 syz-executor *81179 423539 2664 0 7 0x4000000 syz-executor 8045 441615 48025 0 3 0 vmmaplk syz-executor 8045 247049 48025 0 2 0x4000000 syz-executor 83503 120051 96374 0 2 0 syz-executor 83503 419814 96374 0 2 0x4000000 syz-executor 83503 274027 96374 0 3 0x4000080 fsleep syz-executor 43943 333610 86772 0 2 0 syz-executor 43943 66546 86772 0 3 0x4000080 fifow syz-executor 43943 181775 86772 0 3 0x4000080 fsleep syz-executor 43943 211085 86772 0 3 0x4000080 fsleep syz-executor 46486 351164 33092 0 7 0 syz-executor 46486 342496 33092 0 3 0x4000080 ttyout syz-executor 46486 206950 33092 0 3 0x4000080 ttyout syz-executor 46486 259055 33092 0 2 0x4000000 syz-executor 22386 333876 95365 0 2 0x2 arp 95365 56973 94119 0 3 0x10008a sigsusp sh 94119 51702 10034 0 3 0x82 wait syz-executor 42730 89184 1 0 3 0x100083 ttyin getty 2664 473992 10034 0 3 0x82 nanoslp syz-executor 13961 190629 10034 0 3 0x82 nanoslp syz-executor 23981 120249 0 0 3 0x14200 bored sosplice 48025 259735 10034 0 3 0x82 nanoslp syz-executor 96374 111483 10034 0 3 0x82 nanoslp syz-executor 86772 393399 10034 0 3 0x82 nanoslp syz-executor 33092 175964 10034 0 3 0x82 nanoslp syz-executor 52276 385764 10034 0 3 0x82 nanoslp syz-executor 10034 196194 2265 0 3 0x82 kqread syz-executor 2265 276120 47064 0 3 0x10008a sigsusp ksh 47064 98412 88027 0 3 0x98 kqread sshd-session 88027 470050 98636 0 3 0x92 kqread sshd-session 98636 170308 1 0 3 0x88 kqread sshd 64460 305037 80142 74 3 0x1100092 bpf pflogd 80142 190670 1 0 3 0x80 sbwait pflogd 81899 417739 71112 73 3 0x1100090 kqread syslogd 71112 224935 1 0 3 0x100082 sbwait syslogd 99774 174390 1 0 3 0x100080 kqread resolvd 16723 171939 91751 77 3 0x100092 kqread dhcpleased 50103 331227 91751 77 3 0x100092 kqread dhcpleased 91751 132392 1 0 3 0x80 kqread dhcpleased 80081 434410 0 0 3 0x14200 bored smr 72276 377382 0 0 2 0x14200 zerothread 75671 85516 0 0 3 0x14200 aiodoned aiodoned 8012 513771 0 0 3 0x14200 syncer update 63709 188852 0 0 3 0x14200 cleaner cleaner 2883 506609 0 0 3 0x14200 reaper reaper 42466 445742 0 0 3 0x14200 pgdaemon pagedaemon 26082 324209 0 0 3 0x14200 bored viomb 31946 59252 0 0 3 0x40014200 acpi0 acpi0 42244 10116 0 0 3 0x40014200 idle1 79570 230038 0 0 3 0x14200 bored softnet7 3561 172710 0 0 3 0x14200 bored softnet6 98603 147631 0 0 3 0x14200 bored softnet5 17762 127769 0 0 3 0x14200 bored softnet4 79887 37736 0 0 3 0x14200 bored softnet3 73907 374061 0 0 3 0x14200 bored softnet2 26204 107492 0 0 3 0x14200 bored softnet1 66034 117018 0 0 3 0x14200 bored softnet0 44656 91594 0 0 3 0x14200 bored systqmp 87151 460753 0 0 3 0x14200 bored systq 42398 202737 0 0 3 0x14200 tmoslp softclockmp 18417 57588 0 0 3 0x40014200 tmoslp softclock 20454 151361 0 0 3 0x40014200 idle0 1 56505 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff83987490) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x124 sys/kern/subr_pool.c:581 #4 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x195 sys/kern/sysv_shm.c:482 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 81179 (syz-executor) thread 0xffff80003b03b4e8 (423539) Process 8045 (syz-executor) thread 0xffff80003b03a2c0 (247049) Process 83503 (syz-executor) thread 0xffff80003b03a558 (419814) Process 46486 (syz-executor) thread 0xffff80002a2e0560 (259055) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10253 11060K 12629K 166960K 14649 0 pcb 18 16K 30K 166960K 654 0 rtable 184 12K 12K 166960K 591 0 pf 40 18K 67486K 166960K 339 0 ifaddr 37 7K 8K 166960K 196 0 ifgroup 65 2K 3K 166960K 354 0 sysctl 4 1K 9K 166960K 17 0 counters 74 37K 38K 166960K 442 0 ioctlops 0 0K 4K 166960K 1923 0 iov 0 0K 36K 166960K 135 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1532 96K 97K 166960K 3489 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 271 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 240K 166960K 2780 0 sigio 0 0K 0K 166960K 108 0 proc 72 115K 180K 166960K 1203 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 358 0 in_multi 54 4K 7K 166960K 193 0 ether_multi 1 0K 0K 166960K 18 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 169 758K 758K 166960K 169 0 exec 0 0K 1K 166960K 766 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 52 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 250 161K 175K 166960K 26190 0 UVM aobj 32 4K 4K 166960K 35 0 pinsyscall 44 88K 101K 166960K 3970 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 150 0 NDP 15 0K 1K 166960K 155 0 temp 77 8652K 8740K 166960K 77198 0 kqueue 15 24K 28K 166960K 446 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 120 296 0 293 3 2 1 3 0 8 0 rtentry 176 169 0 109 5 0 5 5 0 8 0 unpcb 144 1635 0 1614 11 7 4 6 0 8 3 syncache 336 7 0 7 4 4 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 759 0 752 19 12 7 7 0 8 6 arp 128 21 0 11 1 0 1 1 0 8 0 inpcb 328 2593 0 2580 21 14 7 10 0 8 5 nd6 144 30 0 18 1 0 1 1 0 8 0 pkpcb 40 105 0 105 3 2 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 3 0 3 2 2 0 1 0 8 0 ppxss 1192 164 0 163 4 3 1 1 0 8 0 pppxif 1504 8 0 8 4 3 1 1 0 8 1 pffrag 232 16 0 11 1 0 1 1 0 482 0 pffrnode 88 15 0 10 1 0 1 1 0 8 0 pffrent 40 23 0 18 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 24 119 0 76 1 0 1 1 0 8 0 pfstkey 128 119 0 76 2 0 2 2 0 8 0 pfstate 384 119 0 76 6 1 5 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 1 3 0 3 3 0 8 1 art_heap4 256 751 0 470 30 7 23 30 0 8 0 art_table 40 754 0 471 5 0 5 5 0 8 0 art_node 32 169 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 268 0 258 1 0 1 1 0 8 0 shmpl 112 32 0 4 1 0 1 1 0 8 0 shmpl: pool(0xffffffff83987478:shmpl): free list modified: page 0xfffffd805f6b0000; item ordinal 0; addr 0xfffffd805f6b09a0 (p 0xfffffd805f6b0000); offset 0x0=0x0 shmpl: pool(0xffffffff83987478:shmpl): page inconsistency: page 0xfffffd805f6b0000; item ordinal 1; addr 0x46244fcf042cf197 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 6445 0 4927 96 0 96 96 0 8 0 ffsino 296 6445 0 4927 118 0 118 118 0 8 0 nchpl 144 10392 0 9841 64 39 25 64 0 8 0 rtmask 32 33 0 33 5 4 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 34095 0 34094 4 3 1 2 0 8 0 percpumem 16 236 0 184 1 0 1 1 0 8 0 kstatmem 264 270 0 234 4 1 3 3 0 8 0 scsiplug 72 7 0 7 4 4 0 1 0 8 0 scxspl 216 57625 0 57625 16 15 1 8 1 8 1 plimitpl 152 647 0 629 2 1 1 2 0 8 0 sigapl 424 3077 0 3021 7 0 7 7 0 8 0 knotepl 120 776 0 0 23 0 23 23 0 8 0 kqueuepl 224 913 0 901 12 11 1 5 0 8 0 pipepl 344 433 0 406 15 12 3 9 0 8 0 fdescpl 528 3046 0 3013 3 0 3 3 0 8 0 filepl 160 18972 0 18749 40 24 16 21 0 8 5 lockfpl 104 1216 0 1213 2 0 2 2 0 8 1 lockfspl 48 463 0 460 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 143 0 126 1 0 1 1 0 8 0 ucredpl 104 2996 0 2983 1 0 1 1 0 8 0 zombiepl 144 3569 0 3569 1 0 1 1 0 8 1 processpl 1248 3077 0 3021 5 0 5 5 0 8 0 procpl 664 7043 0 6974 7 0 7 7 0 8 0 sosppl 168 9 0 9 4 4 0 1 0 8 0 sockpl 752 4819 0 4782 50 39 11 23 0 8 7 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 24 0 0 3 0 3 3 0 8 1 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 59 0 0 6 1 5 6 0 8 0 mtagpl 96 42 0 0 2 0 2 2 0 8 0 mbufpl 256 1221 0 0 75 1 74 74 0 8 0 bufpl 280 22639 0 16496 441 1 440 440 0 8 0 anonpl 32 12006 0 0 97 0 97 97 0 246 0 amapchunkpl 152 93163 0 92592 59 28 31 40 0 158 7 amappl16 200 9497 0 9434 51 34 17 21 0 8 4 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 127 0 115 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 3756 0 3723 2 0 2 2 0 8 0 amappl11 160 55 0 41 1 0 1 1 0 8 0 amappl10 152 6 0 6 2 2 0 1 0 8 0 amappl9 144 314 0 314 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 128 0 116 1 0 1 1 0 8 0 amappl6 120 223 0 218 1 0 1 1 0 8 0 amappl5 112 158 0 148 1 0 1 1 0 8 0 amappl4 104 329 0 309 1 0 1 1 0 8 0 amappl3 96 18851 0 18735 4 0 4 4 0 8 0 amappl2 88 722 0 654 2 0 2 2 0 8 0 amappl1 80 20069 0 19445 17 2 15 15 0 8 0 amappl 88 25119 0 24943 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 256 0 256 3 3 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 72 34 0 3 1 0 1 1 0 8 0 uaddrrnd 24 3046 0 3013 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3046 0 3013 1 0 1 1 0 8 0 vmmpekpl 168 22827 0 22776 3 0 3 3 0 8 0 vmmpepl 168 192675 0 190539 124 20 104 108 0 357 1 vmsppl 488 3045 0 3013 6 1 5 5 0 8 0 rwobjpl 80 53577 0 46610 148 1 147 148 0 8 1 pdppl 4096 6100 0 6026 126 52 74 84 0 8 0 pvpl 32 23648 0 0 190 1 189 189 0 265 0 pmappl 256 3045 0 3013 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 400 0 86 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 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:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x70668f229040, count: 7 ddb{0}> trace x86_ipi_db(ffffffff837f4ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:153 __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839041b0) at __mp_lock+0x1a3 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:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x70668f229040, count: -8 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(ffffffff833a8946) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83987478,1,ffff80003c455c48) at pool_do_get+0x597 sys/kern/subr_pool.c:743 pool_get(ffffffff83987478,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b03b4e8,ffff80003c455ea0,0,ffff80003c455df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b03b4e8,ffff80003c455ea0,ffff80003c455df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c455ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c455ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7553325bf10, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a8946) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83987478,1,ffff80003c455c48) at pool_do_get+0x597 sys/kern/subr_pool.c:743 pool_get(ffffffff83987478,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003b03b4e8,ffff80003c455ea0,0,ffff80003c455df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003b03b4e8,ffff80003c455ea0,ffff80003c455df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c455ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c455ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7553325bf10, count: -8