panic: pool_do_get: shmpl free list modified: page 0xfffffd8069d0d000; item addr 0xfffffd8069d0d700; offset 0x40=0x0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *482819 51579 0 0 0x4000000 1 syz-executor 389456 42476 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336d2fe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838e1460,1,ffff80003c499818) at pool_do_get+0x5df pool_get(ffffffff838e1460,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a39bcc0,ffff80003c499a70,12a,ffff80003c4999c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a39bcc0,ffff80003c499a70,ffff80003c4999c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c499a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92b77ef8220, 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 0xfffffd8069d0d000; item addr 0xfffffd8069d0d700; offset 0x40=0x0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336d2fe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838e1460,1,ffff80003c499818) at pool_do_get+0x5df pool_get(ffffffff838e1460,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a39bcc0,ffff80003c499a70,12a,ffff80003c4999c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a39bcc0,ffff80003c499a70,ffff80003c4999c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c499a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92b77ef8220, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c499640 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80002a39bcc0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3c59b6f0a74fadc r11 0x2ee26b97aa9276b7 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff81d8e965 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c499630 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=482819 pid=51579 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a39ad30,0xffff800033c09cb8 process=0xffff80003a826b70 user=0xffff80003c494000, vmspace=0xfffffd800e7a99a8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61075 365182 32182 0 2 0 syz-executor 95477 288759 37511 0 2 0x3000 syz-executor 51579 337766 10209 0 2 0 syz-executor *51579 482819 10209 0 7 0x4000000 syz-executor 51579 284619 10209 0 3 0x4000080 fsleep syz-executor 7641 116595 28665 0 2 0 syz-executor 7641 237291 28665 0 3 0x4000080 fsleep syz-executor 60349 507244 36161 0 2 0 syz-executor 60349 88507 36161 0 3 0x4000000 biowait syz-executor 87839 269465 10770 0 2 0 syz-executor 87839 212247 10770 0 3 0x4000080 fsleep syz-executor 59490 221969 87788 0 3 0x80 nanoslp syz-executor 59490 188167 87788 0 3 0x4000080 kqread syz-executor 59490 489373 87788 0 3 0x4000080 fsleep syz-executor 59490 429047 87788 0 3 0x4000080 fsleep syz-executor 99674 202041 49130 0 3 0x80 nanoslp syz-executor 99674 154385 49130 0 3 0x4000080 kqsel syz-executor 99674 100311 49130 0 3 0x4000080 fsleep syz-executor 99674 226686 49130 0 3 0x4000080 fsleep syz-executor 58000 410309 0 0 3 0x14280 nfsidl nfsio 38375 166133 0 0 3 0x14280 nfsidl nfsio 96001 35930 0 0 3 0x14280 nfsidl nfsio 37647 368753 0 0 3 0x14280 nfsidl nfsio 30949 356581 0 0 3 0x14280 nfsidl nfsio 63899 488633 0 0 3 0x14280 nfsidl nfsio 68253 300130 0 0 3 0x14280 nfsidl nfsio 8095 299457 0 0 3 0x14280 nfsidl nfsio 37118 245713 0 0 3 0x14280 nfsidl nfsio 6540 336320 0 0 3 0x14280 nfsidl nfsio 99993 391424 0 0 3 0x14280 nfsidl nfsio 16307 79070 0 0 3 0x14280 nfsidl nfsio 81768 401211 0 0 3 0x14280 nfsidl nfsio 57949 366490 0 0 3 0x14280 nfsidl nfsio 2415 206964 0 0 3 0x14280 nfsidl nfsio 36217 207450 0 0 3 0x14280 nfsidl nfsio 41316 30210 0 0 3 0x14280 nfsidl nfsio 65158 470773 0 0 3 0x14280 nfsidl nfsio 17214 188098 0 0 3 0x14280 nfsidl nfsio 47871 519234 0 0 3 0x14280 nfsidl nfsio 49130 78708 46412 0 3 0x82 nanoslp syz-executor 49810 35926 0 0 3 0x14200 bored sosplice 10770 275026 46412 0 2 0x2 syz-executor 36161 293724 46412 0 3 0x82 nanoslp syz-executor 87788 329807 46412 0 3 0x82 nanoslp syz-executor 10209 35610 46412 0 3 0x82 nanoslp syz-executor 28665 319190 46412 0 3 0x82 nanoslp syz-executor 37511 65119 46412 0 3 0x82 nanoslp syz-executor 32182 483934 46412 0 2 0x2 syz-executor 46412 125562 79820 0 2 0x2 syz-executor 79820 158452 80790 0 3 0x10008a sigsusp ksh 80790 68690 23493 0 3 0x98 kqread sshd-session 23493 281740 31213 0 3 0x92 kqread sshd-session 83689 89829 1 0 3 0x100083 ttyin getty 31213 298382 1 0 3 0x88 kqread sshd 73469 213219 77600 74 3 0x1100092 bpf pflogd 77600 388828 1 0 3 0x80 sbwait pflogd 88200 450179 7980 73 3 0x1100090 kqread syslogd 7980 520643 1 0 3 0x100082 sbwait syslogd 59623 145622 1 0 3 0x100080 kqread resolvd 52460 98850 91935 77 3 0x100092 kqread dhcpleased 97123 84361 91935 77 3 0x100092 kqread dhcpleased 91935 75931 1 0 3 0x80 kqread dhcpleased 10437 409054 0 0 3 0x14200 bored smr 90551 478173 0 0 2 0x14200 zerothread 94962 114149 0 0 3 0x14200 aiodoned aiodoned 22105 421350 0 0 3 0x14200 syncer update 63757 383189 0 0 3 0x14200 cleaner cleaner 42476 389456 0 0 7 0x14200 reaper 3011 17172 0 0 3 0x14200 pgdaemon pagedaemon 45933 286005 0 0 3 0x14200 bored viomb 7854 444973 0 0 3 0x40014200 acpi0 acpi0 85848 292686 0 0 3 0x40014200 idle1 31789 398971 0 0 3 0x14200 bored softnet7 59911 258240 0 0 3 0x14200 bored softnet6 11396 360685 0 0 3 0x14200 bored softnet5 34052 232912 0 0 3 0x14200 bored softnet4 35587 362843 0 0 3 0x14200 bored softnet3 1574 183886 0 0 3 0x14200 bored softnet2 12819 51972 0 0 3 0x14200 bored softnet1 34281 437452 0 0 3 0x14200 bored softnet0 86029 428079 0 0 3 0x14200 bored systqmp 16764 466158 0 0 3 0x14200 bored systq 80459 503802 0 0 3 0x14200 tmoslp softclockmp 2562 115308 0 0 3 0x40014200 tmoslp softclock 13338 501867 0 0 3 0x40014200 idle0 1 436318 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8394c310) #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 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 CPU 1: exclusive mutex shmpl r = 0 (0xffffffff838e1478) #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 51579 (syz-executor) thread 0xffff80002a39bcc0 (482819) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839a9350) #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 (0xffffffff838e1478) #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 60349 (syz-executor) thread 0xffff800033c09778 (88507) exclusive rrwlock inode r = 0 (0xfffffd806e3be5b8) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11029K 11202K 166960K 11626 0 pcb 17 13K 14K 166960K 146 0 rtable 182 7K 7K 166960K 380 0 pf 34 17K 81K 166960K 112 0 ifaddr 38 6K 8K 166960K 72 0 ifgroup 51 2K 2K 166960K 100 0 sysctl 4 1K 9K 166960K 15 0 counters 66 36K 37K 166960K 106 0 ioctlops 0 0K 4K 166960K 1642 0 iov 0 0K 16K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1367 86K 86K 166960K 1781 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 680 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 180K 166960K 622 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 64 0 in_multi 78 5K 7K 166960K 134 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 442 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 241 159K 176K 166960K 8063 0 UVM aobj 15 2K 2K 166960K 18 0 pinsyscall 43 86K 102K 166960K 1829 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 77 0 NDP 11 0K 1K 166960K 46 0 temp 53 8642K 8770K 166960K 29629 0 kqueue 21 31K 33K 166960K 165 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 120 144 0 140 2 0 2 2 0 8 1 rtentry 176 124 0 50 5 0 5 5 0 8 0 unpcb 144 300 0 283 1 0 1 1 0 8 0 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 167 0 162 1 0 1 1 0 8 0 arp 136 14 0 4 1 0 1 1 0 8 0 inpcb 328 599 0 588 7 0 7 7 0 8 5 nd6 144 21 0 7 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 14 0 14 1 0 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 5 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 7 0 4 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 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstitem 24 54 0 2 1 0 1 1 0 8 0 pfstkey 128 56 0 4 2 0 2 2 0 8 0 pfstate 384 54 0 3 6 0 6 6 0 8 0 pfrule 1344 34 0 29 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 630 0 322 30 4 26 30 0 8 3 art_table 40 633 0 322 5 0 5 5 0 8 0 art_node 32 123 0 59 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 pool(0xffffffff838e1460:shmpl): page inconsistency: page 0xfffffd8069d0d000; 22 on list, 12 missing, 35 items per page dirhash 1024 30 0 13 3 0 3 3 0 8 0 dino2pl 256 2611 0 1102 96 0 96 96 0 8 0 ffsino 296 2611 0 1102 118 0 118 118 0 8 0 nchpl 144 3558 0 1867 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 2920 0 0 60 0 60 60 0 8 0 vnodes 216 2920 0 0 163 0 163 163 0 8 0 namei 1024 12686 0 12686 2 1 1 2 0 8 1 percpumem 16 68 0 20 1 0 1 1 0 8 0 kstatmem 264 58 0 34 3 1 2 3 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 20872 0 20871 10 7 3 8 1 8 2 plimitpl 152 174 0 155 1 0 1 1 0 8 0 sigapl 424 1020 0 945 9 0 9 9 0 8 0 knotepl 120 563 0 0 18 0 18 18 0 8 0 kqueuepl 224 251 0 236 5 3 2 4 0 8 0 pipepl 344 154 0 127 3 0 3 3 0 8 0 fdescpl 528 970 0 938 3 0 3 3 0 8 0 filepl 160 4930 0 4705 15 1 14 15 0 8 4 lockfpl 104 261 0 258 2 1 1 2 0 8 0 lockfspl 48 111 0 108 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 613 0 599 1 0 1 1 0 8 0 zombiepl 144 946 0 945 1 0 1 1 0 8 0 processpl 1232 1020 0 945 6 0 6 6 0 8 0 procpl 664 1960 0 1874 8 0 8 8 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 752 1067 0 1034 11 0 11 11 0 8 7 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 1622 0 0 101 0 101 101 0 8 0 bufpl 280 8451 0 2308 439 0 439 439 0 8 0 anonpl 32 8659 0 0 70 0 70 70 0 246 0 amapchunkpl 152 26063 0 25563 37 5 32 32 0 158 11 amappl16 200 3746 0 3705 20 6 14 17 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1688 0 1656 4 2 2 3 0 8 0 amappl11 160 106 0 92 1 0 1 1 0 8 0 amappl10 152 8 0 7 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 34 0 32 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 185 0 182 1 0 1 1 0 8 0 amappl5 112 132 0 121 1 0 1 1 0 8 0 amappl4 104 314 0 295 1 0 1 1 0 8 0 amappl3 96 4399 0 4301 4 1 3 3 0 8 0 amappl2 88 1226 0 1148 2 0 2 2 0 8 0 amappl1 80 11233 0 10634 16 1 15 15 0 8 0 amappl 88 7244 0 7075 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 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 17 0 3 1 0 1 1 0 8 0 uaddrrnd 24 970 0 938 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 970 0 938 1 0 1 1 0 8 0 vmmpekpl 168 9658 0 9616 3 0 3 3 0 8 0 vmmpepl 168 67961 0 65915 103 1 102 103 0 357 7 vmsppl 488 969 0 938 5 0 5 5 0 8 0 rwobjpl 80 23721 0 19840 83 0 83 83 0 8 0 pdppl 4096 1948 0 1876 102 30 72 84 0 8 0 pvpl 32 18316 0 0 148 0 148 148 0 265 0 pmappl 256 969 0 938 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 370 0 38 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837e3ff0) 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 msleep_nsec(ffffffff837a62a8,ffffffff837a6270,4,ffffffff833848b3,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff837e3ff0) 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 msleep_nsec(ffffffff837a62a8,ffffffff837a6270,4,ffffffff833848b3,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -5 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(ffffffff8336d2fe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838e1460,1,ffff80003c499818) at pool_do_get+0x5df pool_get(ffffffff838e1460,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a39bcc0,ffff80003c499a70,12a,ffff80003c4999c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a39bcc0,ffff80003c499a70,ffff80003c4999c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c499a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92b77ef8220, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336d2fe) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838e1460,1,ffff80003c499818) at pool_do_get+0x5df pool_get(ffffffff838e1460,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a39bcc0,ffff80003c499a70,12a,ffff80003c4999c0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a39bcc0,ffff80003c499a70,ffff80003c4999c0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c499a70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c499a70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92b77ef8220, count: -8