panic: pool_do_get: shmpl free list modified: page 0xfffffd806a372000; item addr 0xfffffd806a372930; offset 0x40=0x69f5b703 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 127969 68530 32767 0x10 0 0 syz-executor *386369 68530 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83443ffe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83a9ee40,1,ffff80002a2cac18) at pool_do_get+0x5df pool_get(ffffffff83a9ee40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeefa8,ffff80002a2cae70,38,ffff80002a2cadc0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeefa8,ffff80002a2cae70,ffff80002a2cadc0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2cae70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cae70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd64274a0280, 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 0xfffffd806a372000; item addr 0xfffffd806a372930; offset 0x40=0x69f5b703 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83443ffe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83a9ee40,1,ffff80002a2cac18) at pool_do_get+0x5df pool_get(ffffffff83a9ee40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeefa8,ffff80002a2cae70,38,ffff80002a2cadc0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeefa8,ffff80002a2cae70,ffff80002a2cadc0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2cae70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cae70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd64274a0280, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2caa40 rbx 0xffff8000299bee07 rdx 0 rcx 0xffff8000fffeefa8 rax 0xffff8000299bdff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x947dcb77ef63b4d9 r11 0xabc352f27c8ac190 r12 0xffff8000299bec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8254b025 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a2caa30 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=386369 pid=68530 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffef4d8,0xffff8000fffef780 process=0xffff80003c3f6b70 user=0xffff80002a2c5000, vmspace=0xfffffd800dc35210 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 68530 127969 64029 32767 7 0x10 syz-executor *68530 386369 64029 32767 7 0x4000010 syz-executor 68530 217729 64029 32767 3 0x4000090 fsleep syz-executor 68530 118580 64029 32767 3 0x4000090 fsleep syz-executor 67506 506313 12747 0 3 0x2 biowait syz-executor 79551 292110 84856 32767 3 0x90 nanoslp syz-executor 79551 505645 84856 32767 3 0x4000090 fsleep syz-executor 79551 109960 84856 32767 3 0x4000090 sbwait syz-executor 79551 523150 84856 32767 3 0x4000090 fsleep syz-executor 28046 349861 59389 32767 3 0x90 piperd syz-executor 64029 447276 1946 32767 3 0x90 nanoslp syz-executor 95987 14661 29938 32767 3 0x90 piperd syz-executor 84856 294175 18680 32767 3 0x90 nanoslp syz-executor 71161 354031 3999 32767 3 0x90 piperd syz-executor 93578 73889 16291 32767 3 0x90 piperd syz-executor 59389 337740 12747 0 3 0x82 wait syz-executor 29938 447788 12747 0 3 0x82 wait syz-executor 16291 487367 12747 0 3 0x82 wait syz-executor 18680 234152 12747 0 3 0x82 wait syz-executor 1946 476279 12747 0 3 0x82 wait syz-executor 3999 221946 12747 0 3 0x82 wait syz-executor 12747 473547 43317 0 3 0x82 nanoslp syz-executor 43317 163072 70871 0 3 0x10008a sigsusp ksh 70871 284624 22848 0 3 0x98 kqread sshd-session 22848 192899 97934 0 3 0x92 kqread sshd-session 82730 312549 1 0 3 0x100083 ttyin getty 97934 73566 1 0 3 0x88 kqread sshd 48484 200883 25898 73 3 0x1100090 kqread syslogd 25898 334144 1 0 3 0x100082 sbwait syslogd 45273 51010 1 0 3 0x100080 kqread resolvd 60866 163018 63274 77 3 0x100092 kqread dhcpleased 24079 387944 63274 77 3 0x100092 kqread dhcpleased 63274 9484 1 0 3 0x80 kqread dhcpleased 11307 4886 0 0 3 0x14200 bored smr 77135 52291 0 0 3 0x14200 pgzero zerothread 94335 386803 0 0 3 0x14200 aiodoned aiodoned 15732 449386 0 0 3 0x14200 syncer update 65286 136955 0 0 3 0x14200 cleaner cleaner 6915 155272 0 0 3 0x14200 reaper reaper 35377 260847 0 0 3 0x14200 pgdaemon pagedaemon 65599 328941 0 0 3 0x14200 bored viomb 83308 485509 0 0 3 0x40014200 acpi0 acpi0 16389 298397 0 0 3 0x40014200 idle1 20716 120011 0 0 3 0x14200 bored softnet1 45623 515770 0 0 3 0x14200 bored softnet0 63581 302819 0 0 3 0x14200 bored systqmp 55356 183524 0 0 3 0x14200 bored systq 55 471238 0 0 3 0x14200 tmoslp softclockmp 29076 147618 0 0 3 0x40014200 tmoslp softclock 13796 383866 0 0 3 0x40014200 idle0 1 90856 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff83a9ee58) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 68530 (syz-executor) thread 0xffff8000fffeefa8 (386369) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8399adc0) #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:783 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83a9ee58) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 67506 (syz-executor) thread 0xffff8000fffef240 (506313) exclusive rrwlock inode r = 0 (0xfffffd8078791d88) #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+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806f9b0450) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12014K 12034K 166960K 12146 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 7K 166960K 354 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 66 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 39 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1289 81K 81K 166960K 1652 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 10 1K 1K 166960K 11 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 58K 129K 166960K 366 0 sigio 0 0K 0K 166960K 1 0 proc 58 99K 163K 166960K 519 0 subproc 54 3K 4K 166960K 360 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 16 0 in_multi 77 5K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 409 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 199 158K 205K 166960K 4352 0 UVM aobj 7 2K 2K 166960K 9 0 pinsyscall 38 76K 114K 166960K 1449 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 6 0 NDP 9 0K 2K 166960K 27 0 temp 32 9075K 9139K 166960K 4856 0 kqueue 14 22K 27K 166960K 43 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 39 0 36 1 0 1 1 0 8 0 rtentry 176 112 0 24 6 0 6 6 0 8 1 unpcb 144 115 0 96 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 43 0 37 1 0 1 1 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 3 0 3 1 0 1 1 0 8 1 inpcb 328 135 0 124 2 0 2 2 0 8 1 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 152 25 0 7 1 0 1 1 0 8 0 kcovpl 48 40 0 34 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 454 0 90 29 0 29 29 0 8 3 art_table 40 455 0 90 5 0 5 5 0 8 0 art_node 32 112 0 32 1 0 1 1 0 8 0 semapl 112 9 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 2 1 0 1 1 0 8 0 pool(0xffffffff83a9ee40:shmpl): page inconsistency: page 0xfffffd806a372000; 30 on list, 4 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1742 0 242 94 0 94 94 0 8 0 ffsino 296 1742 0 242 116 0 116 116 0 8 0 nchpl 144 2069 0 352 64 0 64 64 0 8 0 vnodes 216 2111 0 0 118 0 118 118 0 8 0 namei 1024 6578 0 6577 1 0 1 1 0 8 0 percpumem 16 50 0 2 1 0 1 1 0 8 0 kstatmem 264 25 0 4 2 0 2 2 0 8 0 scxspl 216 7187 0 7186 9 1 8 8 1 8 7 plimitpl 152 120 0 99 2 0 2 2 0 8 1 sigapl 424 593 0 548 7 0 7 7 0 8 0 knotepl 120 95 0 0 3 0 3 3 0 8 0 kqueuepl 224 45 0 35 1 0 1 1 0 8 0 pipepl 344 222 0 195 3 0 3 3 0 8 0 fdescpl 528 577 0 548 4 0 4 4 0 8 0 filepl 160 2470 0 2285 10 0 10 10 0 8 0 lockfpl 104 46 0 44 1 0 1 1 0 8 0 lockfspl 48 19 0 17 1 0 1 1 0 8 0 sessionpl 144 58 0 44 1 0 1 1 0 8 0 pgrppl 48 102 0 81 1 0 1 1 0 8 0 ucredpl 104 249 0 232 1 0 1 1 0 8 0 zombiepl 144 548 0 548 1 0 1 1 0 8 1 processpl 1232 593 0 548 5 0 5 5 0 8 0 procpl 664 775 0 724 6 0 6 6 0 8 0 sockpl 752 292 0 259 5 0 5 5 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 271 0 0 17 0 17 17 0 8 0 bufpl 280 2377 0 102 163 0 163 163 0 8 0 anonpl 32 3734 0 0 31 0 31 31 0 246 0 amapchunkpl 152 13194 0 12803 32 0 32 32 0 158 14 amappl16 200 2095 0 2080 5 3 2 5 0 8 0 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 405 0 404 1 0 1 1 0 8 0 amappl13 176 113 0 103 1 0 1 1 0 8 0 amappl12 168 810 0 783 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 74 0 64 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 95 0 94 1 0 1 1 0 8 0 amappl7 128 155 0 144 1 0 1 1 0 8 0 amappl6 120 153 0 152 1 0 1 1 0 8 0 amappl5 112 91 0 83 1 0 1 1 0 8 0 amappl4 104 261 0 245 1 0 1 1 0 8 0 amappl3 96 2192 0 2100 5 1 4 4 0 8 0 amappl2 88 529 0 472 2 0 2 2 0 8 0 amappl1 80 10682 0 10135 16 0 16 16 0 8 0 amappl 88 3594 0 3457 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 128 253 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 577 0 548 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 577 0 548 1 0 1 1 0 8 0 vmmpekpl 168 7373 0 7328 3 0 3 3 0 8 0 vmmpepl 168 46147 0 44481 100 0 100 100 0 357 16 vmsppl 488 576 0 548 7 1 6 6 0 8 1 rwobjpl 80 15900 0 15016 24 0 24 24 0 8 2 pdppl 4096 1161 0 1096 111 38 73 99 0 8 8 pvpl 32 10599 0 0 86 0 86 86 0 265 0 pmappl 256 576 0 548 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 286 0 41 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b1ff0) 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 intr_handler(ffff800039fd0fa0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7c1d1c183540, count: 9 ddb{0}> trace x86_ipi_db(ffffffff838b1ff0) 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 intr_handler(ffff800039fd0fa0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7c1d1c183540, count: -6 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(ffffffff83443ffe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83a9ee40,1,ffff80002a2cac18) at pool_do_get+0x5df pool_get(ffffffff83a9ee40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeefa8,ffff80002a2cae70,38,ffff80002a2cadc0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeefa8,ffff80002a2cae70,ffff80002a2cadc0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2cae70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cae70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd64274a0280, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83443ffe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83a9ee40,1,ffff80002a2cac18) at pool_do_get+0x5df pool_get(ffffffff83a9ee40,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffeefa8,ffff80002a2cae70,38,ffff80002a2cadc0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffeefa8,ffff80002a2cae70,ffff80002a2cadc0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2cae70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2cae70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd64274a0280, count: -8