panic: pool_do_get: shmpl free list modified: page 0xfffffd805d955000; item addr 0xfffffd805d955e00; offset 0x40=0x68b9465e Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *477080 89790 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336713a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8389d6d0,1,ffff800032c0ee58) at pool_do_get+0x5df pool_get(ffffffff8389d6d0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c458558,ffff800032c0f0b0,e2,ffff800032c0f000) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c458558,ffff800032c0f0b0,ffff800032c0f000) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800032c0f0b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032c0f0b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fdfdbdbe0, 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 0xfffffd805d955000; item addr 0xfffffd805d955e00; offset 0x40=0x68b9465e ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336713a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8389d6d0,1,ffff800032c0ee58) at pool_do_get+0x5df pool_get(ffffffff8389d6d0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c458558,ffff800032c0f0b0,e2,ffff800032c0f000) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c458558,ffff800032c0f0b0,ffff800032c0f000) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800032c0f0b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032c0f0b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fdfdbdbe0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800032c0ec80 rbx 0xffff8000299eeddf rdx 0xffff800001438400 rcx 0xffff80003c458558 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8f157512bc7c08d r11 0x38c2f47f23a6b524 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82b5b535 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800032c0ec70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=477080 pid=89790 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=64, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4587f0,0xffff80003c459cc0 process=0xffff80003c46eb80 user=0xffff800032c0a000, vmspace=0xfffffd806989e5e8 estcpu=14, cpticks=8, pctcpu=0.0, user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76604 507925 30887 32767 2 0x10 syz-executor 61083 116456 29380 32767 2 0x10 syz-executor 6648 498959 15584 32767 3 0x90 nanoslp syz-executor 6648 361242 15584 32767 3 0x4000090 pipewr syz-executor 6648 518520 15584 32767 3 0x4000090 pipewr syz-executor 6648 262909 15584 32767 3 0x4000090 fsleep syz-executor 89790 22200 55468 32767 2 0x10 syz-executor *89790 477080 55468 32767 7 0x4000010 syz-executor 19833 388735 20236 32767 3 0x90 nanoslp syz-executor 19833 306586 20236 32767 3 0x4000090 nanoslp syz-executor 19833 93287 20236 32767 3 0x4000090 fsleep syz-executor 19833 453950 20236 32767 3 0x4000090 fsleep syz-executor 70219 326795 31850 32767 3 0x90 nanoslp syz-executor 70219 494814 31850 32767 3 0x4000090 fifow syz-executor 70219 294623 31850 32767 3 0x4000090 fsleep syz-executor 37739 214831 0 0 3 0x14200 bored sosplice 30887 349539 67629 32767 3 0x90 nanoslp syz-executor 20236 27358 34415 32767 3 0x90 nanoslp syz-executor 31850 300793 59585 32767 3 0x90 nanoslp syz-executor 12633 376399 10866 32767 3 0x90 nanoslp syz-executor 88390 240889 49954 32767 3 0x90 nanoslp syz-executor 15584 120633 4232 32767 3 0x90 nanoslp syz-executor 55468 294105 77184 32767 3 0x90 nanoslp syz-executor 29380 248563 14103 32767 3 0x90 nanoslp syz-executor 34415 2911 39404 0 3 0x82 wait syz-executor 59585 296777 39404 0 3 0x82 wait syz-executor 67629 485114 39404 0 3 0x82 wait syz-executor 49954 262762 39404 0 3 0x82 wait syz-executor 10866 123853 39404 0 3 0x82 wait syz-executor 77184 227787 39404 0 3 0x82 wait syz-executor 4232 506002 39404 0 3 0x82 wait syz-executor 14103 74471 39404 0 3 0x82 wait syz-executor 39404 283155 44094 0 3 0x82 kqread syz-executor 44094 425085 33627 0 3 0x10008a sigsusp ksh 33627 138147 39239 0 3 0x98 kqread sshd-session 39239 291957 8505 0 3 0x92 kqread sshd-session 27764 448540 1 0 3 0x100083 ttyin getty 8505 472054 1 0 3 0x88 kqread sshd 20574 101438 38275 73 3 0x1100090 kqread syslogd 38275 322625 1 0 3 0x100082 sbwait syslogd 72928 223206 1 0 3 0x100080 kqread resolvd 38309 90924 19373 77 3 0x100092 kqread dhcpleased 42583 493546 19373 77 3 0x100092 kqread dhcpleased 19373 270955 1 0 3 0x80 kqread dhcpleased 60301 210025 0 0 3 0x14200 bored smr 60862 175288 0 0 3 0x14200 pgzero zerothread 38326 121322 0 0 3 0x14200 aiodoned aiodoned 2176 140805 0 0 3 0x14200 syncer update 52621 263282 0 0 3 0x14200 cleaner cleaner 92224 519785 0 0 3 0x14200 reaper reaper 29248 121724 0 0 3 0x14200 pgdaemon pagedaemon 30658 172435 0 0 3 0x14200 bored viomb 75148 177144 0 0 3 0x40014200 acpi0 acpi0 88560 357265 0 0 3 0x40014200 idle1 41133 313819 0 0 3 0x14200 bored softnet7 13075 95422 0 0 3 0x14200 bored softnet6 28368 467023 0 0 3 0x14200 bored softnet5 18133 485226 0 0 3 0x14200 bored softnet4 29951 507216 0 0 3 0x14200 bored softnet3 64557 426636 0 0 3 0x14200 bored softnet2 95258 232828 0 0 3 0x14200 bored softnet1 56461 13039 0 0 3 0x14200 bored softnet0 9528 382836 0 0 3 0x14200 bored systqmp 95967 41205 0 0 3 0x14200 bored systq 75381 487012 0 0 3 0x14200 tmoslp softclockmp 25701 226760 0 0 3 0x40014200 tmoslp softclock 43207 186873 0 0 3 0x40014200 idle0 1 488002 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex vmmpepl r = 0 (0xffffffff838f6be8) #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_put+0xa6 sys/kern/subr_pool.c:799 #4 uvm_unmap_detach+0x1af sys/uvm/uvm_map.c:-1 #5 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 CPU 1: exclusive mutex shmpl r = 0 (0xffffffff8389d6e8) #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:746 #7 Xsyscall+0x128 Process 89790 (syz-executor) thread 0xffff80003c458558 (477080) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83986bb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8389d6e8) #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:746 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 10957K 10968K 166960K 11274 0 pcb 17 12K 12K 166960K 17 0 rtable 207 5K 6K 166960K 261 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 4K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1355 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 203 0 proc 58 99K 179K 166960K 476 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 17 0 in_multi 99 7K 7K 166960K 100 0 ether_multi 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 415 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 260 194K 207K 166960K 3355 0 UVM aobj 4 2K 3K 166960K 5 0 pinsyscall 46 92K 108K 166960K 1225 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 11 0K 2K 166960K 27 0 temp 36 8638K 8702K 166960K 3947 0 kqueue 13 20K 26K 166960K 30 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 42 0 38 1 0 1 1 0 8 0 rtentry 176 96 0 1 5 0 5 5 0 8 0 unpcb 144 59 0 38 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 106 0 100 8 0 8 8 0 8 7 arp 136 10 0 0 1 0 1 1 0 8 0 inpcb 328 192 0 180 8 0 8 8 0 8 6 nd6 144 17 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 438 0 0 28 0 28 28 0 8 0 art_table 40 439 0 0 5 0 5 5 0 8 0 art_node 32 96 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 2 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 pool(0xffffffff8389d6d0:shmpl): page inconsistency: page 0xfffffd805d955000; 33 on list, 1 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1639 0 133 95 0 95 95 0 8 0 ffsino 296 1639 0 133 117 0 117 117 0 8 0 nchpl 144 1910 0 231 63 0 63 63 0 8 0 uvmvnodes 80 1720 0 0 36 0 36 36 0 8 0 vnodes 216 1720 0 0 96 0 96 96 0 8 0 namei 1024 6011 0 6011 2 0 2 2 0 8 2 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6976 0 6976 4 1 3 3 1 8 3 plimitpl 152 43 0 19 2 0 2 2 0 8 1 sigapl 424 487 0 426 8 0 8 8 0 8 0 knotepl 120 363 0 0 11 0 11 11 0 8 0 kqueuepl 224 131 0 121 5 0 5 5 0 8 4 pipepl 344 104 0 76 3 0 3 3 0 8 0 fdescpl 528 464 0 427 3 0 3 3 0 8 0 filepl 160 1945 0 1715 16 0 16 16 0 8 6 lockfpl 104 210 0 208 2 0 2 2 0 8 1 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 29 0 5 1 0 1 1 0 8 0 ucredpl 104 148 0 129 1 0 1 1 0 8 0 zombiepl 144 428 0 426 1 0 1 1 0 8 0 processpl 1232 487 0 426 7 1 6 6 0 8 0 procpl 664 603 0 533 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 296 0 259 12 0 12 12 0 8 7 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 272 0 0 17 0 17 17 0 8 0 bufpl 280 3067 0 117 211 0 211 211 0 8 0 anonpl 32 6454 0 0 52 0 52 52 0 246 0 amapchunkpl 152 10076 0 9419 34 3 31 31 0 158 1 amappl16 200 1249 0 1227 5 0 5 5 0 8 1 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 103 0 92 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 0 1 1 0 8 1 amappl12 168 1067 0 1032 2 0 2 2 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 0 1 1 0 8 1 amappl9 144 258 0 258 1 0 1 1 0 8 1 amappl8 136 27 0 26 1 0 1 1 0 8 0 amappl7 128 97 0 86 1 0 1 1 0 8 0 amappl6 120 164 0 161 1 0 1 1 0 8 0 amappl5 112 111 0 105 1 0 1 1 0 8 0 amappl4 104 259 0 243 1 0 1 1 0 8 0 amappl3 96 1491 0 1393 3 0 3 3 0 8 0 amappl2 88 683 0 606 2 0 2 2 0 8 0 amappl1 80 8100 0 7539 13 0 13 13 0 8 0 amappl 88 2715 0 2525 5 0 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 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 72 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 464 0 427 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 464 0 427 1 0 1 1 0 8 0 vmmpekpl 168 5187 0 5152 2 0 2 2 0 8 0 vmmpepl 168 34875 0 32794 97 0 97 97 0 357 1 vmsppl 488 463 0 426 7 1 6 6 0 8 0 rwobjpl 80 13603 0 11046 54 0 54 54 0 8 0 pdppl 4096 936 0 852 110 24 86 96 0 8 2 pvpl 32 13913 0 0 114 1 113 113 0 265 0 pmappl 256 463 0 426 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 297 0 27 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83857ff0) 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(ffffffff839869b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839869b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80003c4902c8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003c4902c8,ffff800031409400,ffff800031409350) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031409400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031409400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7034b6a3cce0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83857ff0) 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(ffffffff839869b0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839869b0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80003c4902c8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003c4902c8,ffff800031409400,ffff800031409350) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031409400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031409400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7034b6a3cce0, 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(ffffffff8336713a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8389d6d0,1,ffff800032c0ee58) at pool_do_get+0x5df pool_get(ffffffff8389d6d0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c458558,ffff800032c0f0b0,e2,ffff800032c0f000) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c458558,ffff800032c0f0b0,ffff800032c0f000) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800032c0f0b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032c0f0b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fdfdbdbe0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336713a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8389d6d0,1,ffff800032c0ee58) at pool_do_get+0x5df pool_get(ffffffff8389d6d0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c458558,ffff800032c0f0b0,e2,ffff800032c0f000) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c458558,ffff800032c0f0b0,ffff800032c0f000) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800032c0f0b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032c0f0b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fdfdbdbe0, count: -8