panic: pool_do_get: shmpl free list modified: page 0xfffffd806c941000; item addr 0xfffffd806c941620; offset 0x40=0x6931a8cf Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 123675 21895 32767 0x10 0 0 syz-executor *180055 15518 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a328d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839faa18,1,ffff80003c452d88) at pool_do_get+0x5df pool_get(ffffffff839faa18,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6fb0,ffff80003c452fe0,0,ffff80003c452f30) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6fb0,ffff80003c452fe0,ffff80003c452f30) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c452fe0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c452fe0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x483ca3604d0, 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 0xfffffd806c941000; item addr 0xfffffd806c941620; offset 0x40=0x6931a8cf ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a328d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839faa18,1,ffff80003c452d88) at pool_do_get+0x5df pool_get(ffffffff839faa18,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6fb0,ffff80003c452fe0,0,ffff80003c452f30) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6fb0,ffff80003c452fe0,ffff80003c452f30) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c452fe0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c452fe0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x483ca3604d0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c452bb0 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff8000fffe6fb0 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa50f40caf158830d r11 0xd9288f688ed5d7af r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8156a625 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c452ba0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=180055 pid=15518 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=0xffff8000fffe7248,0xffff8000fffe6030 process=0xffff80003b40f040 user=0xffff80003c44e000, vmspace=0xfffffd806cb0b218 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21895 123675 87943 32767 7 0x10 syz-executor 21895 351183 87943 32767 3 0x4000090 fsleep syz-executor 15518 347813 36022 32767 2 0x10 syz-executor *15518 180055 36022 32767 7 0x4000010 syz-executor 15518 467820 36022 32767 3 0x4000090 fsleep syz-executor 15518 335944 36022 32767 3 0x4000090 fsleep syz-executor 95576 400995 87934 32767 2 0x10 syz-executor 95576 47329 87934 32767 3 0x4000090 fsleep syz-executor 31623 114026 52087 32767 3 0x90 nanoslp syz-executor 31623 166875 52087 32767 3 0x4000090 fsleep syz-executor 31623 517843 52087 32767 3 0x4000090 fsleep syz-executor 31623 180428 52087 32767 3 0x4000090 fsleep syz-executor 7971 259991 16388 32767 2 0x10 syz-executor 7971 267831 16388 32767 3 0x4000090 fsleep syz-executor 7971 443153 16388 32767 3 0x4000090 fsleep syz-executor 36249 478162 40514 0 3 0x82 sbwait sshd-session 52087 24133 25569 32767 3 0x90 nanoslp syz-executor 87943 287244 3952 32767 3 0x90 nanoslp syz-executor 16388 256457 11515 32767 3 0x90 nanoslp syz-executor 36022 179765 41127 32767 3 0x90 nanoslp syz-executor 75619 291591 48972 32767 3 0x90 nanoslp syz-executor 81524 86614 43108 32767 3 0x10 biowait syz-executor 87934 261777 20950 32767 3 0x90 nanoslp syz-executor 38824 304879 67758 32767 3 0x90 nanoslp syz-executor 25569 226610 34809 0 3 0x82 wait syz-executor 41127 466707 34809 0 3 0x82 wait syz-executor 43108 87180 34809 0 3 0x82 wait syz-executor 20950 300780 34809 0 3 0x82 wait syz-executor 48972 113578 34809 0 3 0x82 wait syz-executor 11515 82854 34809 0 3 0x82 wait syz-executor 67758 512303 34809 0 3 0x82 wait syz-executor 3952 432933 34809 0 3 0x82 wait syz-executor 34809 429445 43988 0 3 0x82 kqread syz-executor 43988 219910 75772 0 3 0x10008a sigsusp ksh 75772 454754 70430 0 3 0x98 kqread sshd-session 70430 292166 40514 0 3 0x92 kqread sshd-session 21782 460281 1 0 3 0x100083 ttyin getty 40514 118218 1 0 3 0x88 kqread sshd 55343 243409 18007 73 3 0x1100090 kqread syslogd 18007 335071 1 0 3 0x100082 sbwait syslogd 93153 150880 1 0 3 0x100080 kqread resolvd 86896 253751 84954 77 3 0x100092 kqread dhcpleased 44941 79230 84954 77 3 0x100092 kqread dhcpleased 84954 68897 1 0 3 0x80 kqread dhcpleased 23845 141958 0 0 3 0x14200 bored smr 98382 42970 0 0 2 0x14200 zerothread 72792 425289 0 0 3 0x14200 aiodoned aiodoned 819 519323 0 0 3 0x14200 syncer update 64921 325286 0 0 3 0x14200 cleaner cleaner 83565 376139 0 0 3 0x14200 reaper reaper 99282 389149 0 0 3 0x14200 pgdaemon pagedaemon 36605 297067 0 0 3 0x14200 bored viomb 5673 516090 0 0 3 0x40014200 acpi0 acpi0 55725 174895 0 0 3 0x40014200 idle1 82185 192325 0 0 3 0x14200 bored softnet1 15454 62355 0 0 3 0x14200 bored softnet0 98303 489021 0 0 3 0x14200 bored systqmp 34032 4529 0 0 3 0x14200 bored systq 55051 300906 0 0 3 0x14200 tmoslp softclockmp 99165 115961 0 0 3 0x40014200 tmoslp softclock 84973 85393 0 0 3 0x40014200 idle0 1 212093 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 (0xffffffff839faa30) #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:775 #7 Xsyscall+0x128 Process 21895 (syz-executor) thread 0xffff80003c440fb8 (123675) shared rwlock uobjlk r = 0 (0xfffffd806f664098) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1214 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1348 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806cb0b6e8) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 15518 (syz-executor) thread 0xffff8000fffe6fb0 (180055) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838fcdc8) #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:775 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839faa30) #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:775 #7 Xsyscall+0x128 Process 81524 (syz-executor) thread 0xffff8000fffee7e0 (86614) exclusive rrwlock inode r = 0 (0xfffffd807eb7ceb8) #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+0xa3 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:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d316320) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #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:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 10958K 10973K 166960K 11284 0 pcb 17 14K 16K 166960K 19 0 rtable 247 7K 7K 166960K 381 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 34 0 iov 0 0K 14K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1440 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 33 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 549 0 sigio 0 0K 0K 166960K 5 0 proc 63 115K 147K 166960K 510 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 2 0K 0K 166960K 83 0 in_multi 100 7K 7K 166960K 135 0 ether_multi 1 0K 0K 166960K 9 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 400 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 281 199K 220K 166960K 7184 0 UVM aobj 14 4K 4K 166960K 15 0 pinsyscall 48 96K 112K 166960K 1705 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 11 0K 1K 166960K 27 0 temp 51 8674K 8738K 166960K 5830 0 kqueue 13 20K 32K 166960K 121 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 64 0 61 1 0 1 1 0 8 0 rtentry 176 118 0 3 6 0 6 6 0 8 0 unpcb 144 369 0 347 4 0 4 4 0 8 2 syncache 336 20 0 20 1 0 1 1 0 8 1 tcpqe 32 6 0 6 1 0 1 1 0 8 1 tcpcb 736 412 0 400 7 0 7 7 0 8 5 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 6 0 2 1 0 1 1 0 8 0 ipqe 40 10 0 5 1 0 1 1 0 8 0 inpcb 328 974 0 956 13 3 10 12 0 8 8 nd6 152 31 0 2 2 0 2 2 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 256 498 0 8 32 0 32 32 0 8 0 art_table 40 499 0 8 6 0 6 6 0 8 0 art_node 32 118 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 pool(0xffffffff839faa18:shmpl): page inconsistency: page 0xfffffd806c941000; 23 on list, 11 missing, 35 items per page dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2237 0 725 95 0 95 95 0 8 0 ffsino 296 2237 0 725 117 0 117 117 0 8 0 nchpl 144 3017 0 1328 63 0 63 63 0 8 0 vnodes 216 2318 0 0 129 0 129 129 0 8 0 namei 1024 10518 0 10517 1 0 1 1 0 8 0 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 10190 0 10189 3 2 1 2 1 8 0 plimitpl 152 336 0 312 2 0 2 2 0 8 1 sigapl 424 856 0 802 7 0 7 7 0 8 0 knotepl 120 464 0 0 15 0 15 15 0 8 0 kqueuepl 224 143 0 134 1 0 1 1 0 8 0 pipepl 344 184 0 157 6 0 6 6 0 8 3 fdescpl 528 840 0 802 4 0 4 4 0 8 0 filepl 160 5401 0 5143 16 0 16 16 0 8 3 lockfpl 104 156 0 154 1 0 1 1 0 8 0 lockfspl 48 47 0 45 1 0 1 1 0 8 0 sessionpl 144 38 0 21 1 0 1 1 0 8 0 pgrppl 48 49 0 24 1 0 1 1 0 8 0 ucredpl 104 948 0 929 1 0 1 1 0 8 0 zombiepl 144 804 0 802 1 0 1 1 0 8 0 processpl 1232 856 0 802 5 0 5 5 0 8 0 procpl 664 1593 0 1529 7 0 7 7 0 8 0 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 752 1410 0 1367 19 5 14 17 0 8 8 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 64 0 0 8 0 8 8 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 1888 0 0 118 0 118 118 0 8 0 bufpl 280 3391 0 120 234 0 234 234 0 8 0 anonpl 32 7254 0 0 59 0 59 59 0 246 0 amapchunkpl 152 29698 0 28985 44 0 44 44 0 158 15 amappl16 200 2765 0 2742 14 3 11 14 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 7 0 7 2 1 1 1 0 8 1 amappl13 176 411 0 410 1 0 1 1 0 8 0 amappl12 168 1232 0 1184 3 0 3 3 0 8 0 amappl11 160 27 0 27 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 245 0 244 1 0 1 1 0 8 0 amappl8 136 46 0 45 1 0 1 1 0 8 0 amappl7 128 95 0 94 1 0 1 1 0 8 0 amappl6 120 297 0 285 1 0 1 1 0 8 0 amappl5 112 90 0 82 1 0 1 1 0 8 0 amappl4 104 468 0 442 1 0 1 1 0 8 0 amappl3 96 4140 0 4010 4 0 4 4 0 8 0 amappl2 88 661 0 600 2 0 2 2 0 8 0 amappl1 80 15175 0 14538 17 0 17 17 0 8 0 amappl 88 6282 0 6080 6 0 6 6 0 92 1 uvmvnodes 80 122 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 840 0 802 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 840 0 802 1 0 1 1 0 8 0 vmmpekpl 168 9964 0 9929 3 0 3 3 0 8 0 vmmpepl 168 66840 0 64651 116 0 116 116 0 357 11 vmsppl 488 839 0 802 7 1 6 6 0 8 0 rwobjpl 80 22857 0 21785 26 0 26 26 0 8 0 pdppl 4096 1687 0 1604 129 42 87 97 0 8 4 pvpl 32 15349 0 0 124 0 124 124 0 265 0 pmappl 256 839 0 802 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 422 0 45 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8383eff0) 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(ffffffff838fcbc0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838fcbc0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff800038ff27b0,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838fcbc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838fcbc0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806cb0b5e8,8d5a89bf000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff800038ff2b50,8d5a89bf000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff800038ff2b50) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x734dc64fb410, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8383eff0) 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(ffffffff838fcbc0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838fcbc0) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff800038ff27b0,ffff80000006b400) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838fcbc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838fcbc0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 uvm_fault(fffffd806cb0b5e8,8d5a89bf000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff800038ff2b50,8d5a89bf000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff800038ff2b50) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x734dc64fb410, count: -11 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(ffffffff833a328d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839faa18,1,ffff80003c452d88) at pool_do_get+0x5df pool_get(ffffffff839faa18,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6fb0,ffff80003c452fe0,0,ffff80003c452f30) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6fb0,ffff80003c452fe0,ffff80003c452f30) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c452fe0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c452fe0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x483ca3604d0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a328d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839faa18,1,ffff80003c452d88) at pool_do_get+0x5df pool_get(ffffffff839faa18,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000fffe6fb0,ffff80003c452fe0,0,ffff80003c452f30) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000fffe6fb0,ffff80003c452fe0,ffff80003c452f30) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c452fe0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c452fe0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x483ca3604d0, count: -8