login: panic: pool_do_get: shmpl free list modified: page 0xfffffd805f120000; item addr 0xfffffd805f120380; offset 0x40=0x68913758 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *264495 58912 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365bee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387cca8,1,ffff80003c493998) at pool_do_get+0x5df pool_get(ffffffff8387cca8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c470d28,ffff80003c493bf0,0,ffff80003c493b40) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c470d28,ffff80003c493bf0,ffff80003c493b40) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c493bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c493bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x911b64ce330, 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 0xfffffd805f120000; item addr 0xfffffd805f120380; offset 0x40=0x68913758 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365bee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387cca8,1,ffff80003c493998) at pool_do_get+0x5df pool_get(ffffffff8387cca8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c470d28,ffff80003c493bf0,0,ffff80003c493b40) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c470d28,ffff80003c493bf0,ffff80003c493b40) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c493bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c493bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x911b64ce330, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c4937c0 rbx 0xffff8000299eeddf rdx 0xffff80000145e7c0 rcx 0xffff80003c470d28 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x64d98fed872d827f r11 0x4bb0cf3086f929a1 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff8216f0c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4937b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=264495 pid=58912 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=76, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4714f0,0xffffffff838fb458 process=0xffff80003c476c08 user=0xffff80003c48e000, vmspace=0xfffffd806bb0b020 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96486 343762 40167 32767 2 0x10 syz-executor 96486 234420 40167 32767 3 0x4000090 fsleep syz-executor 21026 331600 31171 32767 2 0x10 syz-executor 21026 171572 31171 32767 3 0x4000090 fsleep syz-executor 58912 42623 64826 32767 2 0x10 syz-executor *58912 264495 64826 32767 7 0x4000010 syz-executor 13783 105406 88218 32767 2 0x10 syz-executor 13783 151663 88218 32767 3 0x4000090 pipewr syz-executor 81504 254891 97100 0 2 0x2 syz-executor 63082 310822 97555 0 3 0x82 sbwait sshd-session 89343 494196 0 0 3 0x14200 bored sosplice 73288 252018 93566 32767 3 0x90 nanoslp syz-executor 79936 246307 33628 32767 3 0x90 wait syz-executor 31171 83235 80938 32767 3 0x90 nanoslp syz-executor 40167 488468 63344 32767 3 0x90 nanoslp syz-executor 88218 48128 2405 32767 3 0x90 nanoslp syz-executor 64826 189489 33250 32767 3 0x90 nanoslp syz-executor 16935 125997 15652 32767 3 0x90 nanoslp syz-executor 33628 363285 97100 0 3 0x82 wait syz-executor 80938 416054 97100 0 3 0x82 wait syz-executor 33250 220346 97100 0 3 0x82 wait syz-executor 2405 78239 97100 0 3 0x82 wait syz-executor 93566 341379 97100 0 3 0x82 wait syz-executor 15652 460398 97100 0 3 0x82 wait syz-executor 63344 215268 97100 0 3 0x82 wait syz-executor 97100 481289 47606 0 3 0x82 kqread syz-executor 47606 366384 70973 0 3 0x10008a sigsusp ksh 70973 316418 94130 0 3 0x98 kqread sshd-session 94130 328731 97555 0 3 0x92 kqread sshd-session 6476 154707 1 0 3 0x100083 ttyin getty 97555 196210 1 0 3 0x88 kqread sshd 24046 512615 72140 73 3 0x1100090 kqread syslogd 72140 368296 1 0 3 0x100082 sbwait syslogd 35428 424700 1 0 3 0x100080 kqread resolvd 58354 381631 94940 77 3 0x100092 kqread dhcpleased 32346 238224 94940 77 3 0x100092 kqread dhcpleased 94940 490516 1 0 3 0x80 kqread dhcpleased 85454 93578 0 0 3 0x14200 bored smr 18057 284761 0 0 2 0x14200 zerothread 28851 109847 0 0 3 0x14200 aiodoned aiodoned 33085 104547 0 0 3 0x14200 syncer update 70832 40531 0 0 3 0x14200 cleaner cleaner 35024 462225 0 0 3 0x14200 reaper reaper 91140 248576 0 0 3 0x14200 pgdaemon pagedaemon 27260 234686 0 0 3 0x14200 bored viomb 78673 153846 0 0 3 0x40014200 acpi0 acpi0 69633 317899 0 0 3 0x40014200 idle1 42020 116704 0 0 3 0x14200 bored softnet7 70522 37700 0 0 3 0x14200 bored softnet6 85878 184742 0 0 3 0x14200 bored softnet5 29687 471468 0 0 3 0x14200 bored softnet4 89581 346304 0 0 3 0x14200 bored softnet3 40829 452956 0 0 3 0x14200 bored softnet2 20666 254798 0 0 3 0x14200 bored softnet1 12427 169904 0 0 3 0x14200 bored softnet0 34833 437183 0 0 3 0x14200 bored systqmp 29328 154893 0 0 3 0x14200 bored systq 71810 144981 0 0 3 0x14200 tmoslp softclockmp 18546 402868 0 0 3 0x40014200 tmoslp softclock 19168 258575 0 0 3 0x40014200 idle0 1 364563 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd8008f53778) #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 pmap_remove_ptes+0x29f pmap_remove_pv sys/arch/amd64/amd64/pmap.c:-1 [inline] #3 pmap_remove_ptes+0x29f sys/arch/amd64/amd64/pmap.c:1711 #4 pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 #5 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #6 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #6 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd800e701310) #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 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #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:748 #9 Xsyscall+0x128 CPU 1: exclusive mutex shmpl r = 0 (0xffffffff8387ccc0) #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 58912 (syz-executor) thread 0xffff80003c470d28 (264495) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8388d158) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff8387ccc0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 10958K 10968K 166960K 11300 0 pcb 17 12K 12K 166960K 17 0 rtable 189 5K 6K 166960K 268 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 20K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1416 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 4 9K 13K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 121K 166960K 395 0 sigio 1 0K 0K 166960K 12 0 proc 58 99K 147K 166960K 523 0 subproc 66 4K 4K 166960K 120 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 29 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 2 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 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 369 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 251 169K 179K 166960K 5151 0 UVM aobj 21 6K 6K 166960K 23 0 pinsyscall 46 92K 108K 166960K 1402 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 10 0K 2K 166960K 27 0 temp 50 8646K 8710K 166960K 10462 0 kqueue 14 22K 28K 166960K 73 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 49 0 46 1 0 1 1 0 8 0 rtentry 176 99 0 13 5 0 5 5 0 8 0 unpcb 144 207 0 190 2 0 2 2 0 8 1 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpcb 736 194 0 183 4 0 4 4 0 8 2 arp 128 11 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 386 0 372 5 0 5 5 0 8 3 ip6q 72 3 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 144 19 0 5 1 0 1 1 0 8 0 kcovpl 48 13 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 475 0 80 30 0 30 30 0 8 3 art_table 40 476 0 80 5 0 5 5 0 8 0 art_node 32 99 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 2 1 0 1 1 0 8 0 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 pool(0xffffffff8387cca8:shmpl): page inconsistency: page 0xfffffd805f120000; 16 on list, 18 missing, 35 items per page dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 1902 0 386 96 0 96 96 0 8 0 ffsino 296 1902 0 386 117 0 117 117 0 8 0 nchpl 144 2423 0 739 63 0 63 63 0 8 0 uvmvnodes 80 2031 0 0 42 0 42 42 0 8 0 vnodes 216 2031 0 0 113 0 113 113 0 8 0 namei 1024 7668 0 7668 2 1 1 2 0 8 1 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 8207 0 8207 3 2 1 2 1 8 1 plimitpl 152 141 0 118 2 0 2 2 0 8 1 sigapl 424 661 0 601 8 0 8 8 0 8 0 knotepl 120 294 0 0 9 0 9 9 0 8 0 kqueuepl 224 87 0 76 2 0 2 2 0 8 1 pipepl 344 199 0 171 3 0 3 3 0 8 0 fdescpl 528 638 0 602 3 0 3 3 0 8 0 filepl 160 3081 0 2866 14 0 14 14 0 8 4 lockfpl 104 77 0 75 1 0 1 1 0 8 0 lockfspl 48 29 0 27 1 0 1 1 0 8 0 sessionpl 144 29 0 13 1 0 1 1 0 8 0 pgrppl 48 45 0 21 1 0 1 1 0 8 0 ucredpl 104 460 0 442 1 0 1 1 0 8 0 zombiepl 144 604 0 601 1 0 1 1 0 8 0 processpl 1248 661 0 601 6 0 6 6 0 8 0 procpl 664 1083 0 1019 7 0 7 7 0 8 0 sockpl 752 647 0 611 8 0 8 8 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 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 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 257 0 0 17 0 17 17 0 8 0 bufpl 280 3204 0 117 221 0 221 221 0 8 0 anonpl 32 10876 0 0 88 0 88 88 0 246 0 amapchunkpl 152 16688 0 16106 34 1 33 33 0 158 7 amappl16 200 3492 0 3390 24 2 22 22 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 106 0 95 1 0 1 1 0 8 0 amappl13 176 30 0 30 1 1 0 1 0 8 0 amappl12 168 1239 0 1203 3 1 2 2 0 8 0 amappl11 160 46 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 99 0 87 1 0 1 1 0 8 0 amappl6 120 168 0 164 1 0 1 1 0 8 0 amappl5 112 112 0 105 1 0 1 1 0 8 0 amappl4 104 266 0 250 1 0 1 1 0 8 0 amappl3 96 2815 0 2697 4 0 4 4 0 8 0 amappl2 88 631 0 569 2 0 2 2 0 8 0 amappl1 80 9456 0 8806 16 0 16 16 0 8 0 amappl 88 4471 0 4290 6 0 6 6 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 638 0 602 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 638 0 602 1 0 1 1 0 8 0 vmmpekpl 168 7074 0 7020 3 0 3 3 0 8 0 vmmpepl 168 48746 0 46524 118 0 118 118 0 357 8 vmsppl 488 637 0 601 6 1 5 6 0 8 0 rwobjpl 80 18677 0 15616 68 0 68 68 0 8 1 pdppl 4096 1284 0 1202 112 28 84 96 0 8 2 pvpl 32 18355 0 0 149 0 149 149 0 265 0 pmappl 256 637 0 601 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 31 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8379bff0) 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(ffffffff8388cf50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388cf50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a2b7a10,b,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a2b7a10,ffff800033c07c50,ffff800033c07ba0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033c07c50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033c07c50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701f2e9f1e70, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8379bff0) 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(ffffffff8388cf50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8388cf50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 exit1(ffff80002a2b7a10,b,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a2b7a10,ffff800033c07c50,ffff800033c07ba0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800033c07c50) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033c07c50) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701f2e9f1e70, 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(ffffffff83365bee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387cca8,1,ffff80003c493998) at pool_do_get+0x5df pool_get(ffffffff8387cca8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c470d28,ffff80003c493bf0,0,ffff80003c493b40) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c470d28,ffff80003c493bf0,ffff80003c493b40) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c493bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c493bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x911b64ce330, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83365bee) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387cca8,1,ffff80003c493998) at pool_do_get+0x5df pool_get(ffffffff8387cca8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c470d28,ffff80003c493bf0,0,ffff80003c493b40) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c470d28,ffff80003c493bf0,ffff80003c493b40) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c493bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c493bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x911b64ce330, count: -8