panic: pool_do_get: shmpl free list modified: page 0xfffffd8073076000; item addr 0xfffffd80730760e8; offset 0x0=0x0 != 0x22ac93dec8c8b73a Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 433164 71838 0 0 0 0 syz-executor *423764 7850 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830138e0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83632670,1,ffff80002a0d7e58) at pool_do_get+0x59d pool_get(ffffffff83632670,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffff71d8,ffff80002a0d80b0,0,ffff80002a0d8000) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff71d8,ffff80002a0d80b0,ffff80002a0d8000) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0d80b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d80b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf81a615e00, 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 0xfffffd8073076000; item addr 0xfffffd80730760e8; offset 0x0=0x0 != 0x22ac93dec8c8b73a ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830138e0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83632670,1,ffff80002a0d7e58) at pool_do_get+0x59d pool_get(ffffffff83632670,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffff71d8,ffff80002a0d80b0,0,ffff80002a0d8000) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff71d8,ffff80002a0d80b0,ffff80002a0d8000) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0d80b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d80b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf81a615e00, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a0d7ca0 rbx 0xffff800029b7cd87 rdx 0xffff80000159a240 rcx 0xffff8000ffff71d8 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf4d8db75d406b937 r11 0xa7d1bfa8974e0a41 r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff8293f4d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a0d7c90 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=423764 pid=7850 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff7bf8,0xffff8000ffff51f0 process=0xffff8000371aad70 user=0xffff80002a0d3000, vmspace=0xfffffd806e96a6e8 estcpu=33, cpticks=2, pctcpu=0.1, user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71838 433164 66399 0 7 0 syz-executor 71838 12933 66399 0 2 0x4000000 syz-executor 76188 350060 87383 0 2 0 syz-executor 76188 190383 87383 0 2 0x4000000 syz-executor 7850 168472 60168 0 2 0 syz-executor * 7850 423764 60168 0 7 0x4000000 syz-executor 7850 368700 60168 0 3 0x4000080 fsleep syz-executor 25319 507299 44341 0 2 0 syz-executor 25319 418806 44341 0 2 0x4000080 syz-executor 25319 207921 44341 0 3 0x4000080 fsleep syz-executor 15692 364823 11938 0 2 0x1000000 syz-executor 15692 450895 11938 0 3 0x5000080 fsleep syz-executor 15692 378973 11938 0 3 0x5000080 fsleep syz-executor 35342 333573 52704 0 2 0 syz-executor 35342 435766 52704 0 2 0x4000000 syz-executor 35342 337270 52704 0 3 0x4000080 fsleep syz-executor 13638 79431 22885 0 3 0x3000 suspend syz-executor 13638 78521 22885 0 3 0x4081000 biowait syz-executor 66399 290641 55012 0 3 0x82 nanoslp syz-executor 95340 314538 55012 0 2 0x2 syz-executor 44341 355219 55012 0 3 0x82 nanoslp syz-executor 52704 149369 55012 0 3 0x82 nanoslp syz-executor 60168 181173 55012 0 3 0x82 nanoslp syz-executor 87383 268744 55012 0 3 0x82 nanoslp syz-executor 22885 140725 55012 0 3 0x82 wait syz-executor 11938 109311 55012 0 3 0x82 nanoslp syz-executor 11624 170576 1 0 3 0x100083 ttyin getty 16008 101355 0 0 3 0x14200 bored sosplice 55012 258466 40632 0 3 0x82 kqread syz-executor 40632 236263 81387 0 3 0x10008a sigsusp ksh 81387 409338 87349 0 3 0x98 kqread sshd-session 87349 397536 19974 0 3 0x92 kqread sshd-session 19974 457365 1 0 3 0x88 kqread sshd 87995 218472 79995 74 3 0x1100092 bpf pflogd 79995 109470 1 0 3 0x80 sbwait pflogd 57689 281350 80422 73 3 0x1100010 ffs_fsync syslogd 80422 420952 1 0 3 0x100082 sbwait syslogd 16116 65066 1 0 3 0x100080 kqread resolvd 39294 274806 94171 77 3 0x100092 kqread dhcpleased 64121 167201 94171 77 3 0x100092 kqread dhcpleased 94171 176309 1 0 3 0x80 kqread dhcpleased 65860 150798 0 0 3 0x14200 bored smr 110 249688 0 0 3 0x14200 pgzero zerothread 70215 144598 0 0 3 0x14200 aiodoned aiodoned 15698 132908 0 0 3 0x14200 syncer update 57897 157494 0 0 3 0x14200 cleaner cleaner 95465 426205 0 0 3 0x14200 reaper reaper 30760 501566 0 0 3 0x14200 pgdaemon pagedaemon 6362 318368 0 0 3 0x14200 bored viomb 70866 446214 0 0 3 0x40014200 acpi0 acpi0 98922 30966 0 0 3 0x40014200 idle1 7266 4455 0 0 3 0x14200 bored softnet3 31536 158812 0 0 3 0x14200 bored softnet2 61812 176871 0 0 3 0x14200 bored softnet1 60022 465038 0 0 3 0x14200 bored softnet0 53753 227151 0 0 3 0x14200 bored systqmp 80058 93065 0 0 3 0x14200 bored systq 90345 186304 0 0 3 0x14200 tmoslp softclockmp 29227 72837 0 0 3 0x40014200 tmoslp softclock 83603 240496 0 0 3 0x40014200 idle0 1 142132 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 (0xffffffff83632680) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 7850 (syz-executor) thread 0xffff8000ffff71d8 (423764) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83553788) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83632680) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x103 sys/kern/subr_pool.c:579 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 13638 (syz-executor) thread 0xffff8000ffff6cc8 (78521) exclusive rrwlock inode r = 0 (0xfffffd806dac25e8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 95340 (syz-executor) thread 0xffff8000ffff62a8 (314538) exclusive rwlock vmmaplk r = 0 (0xfffffd8069a9beb8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3822 #4 process_new+0x553 sys/kern/kern_fork.c:279 #5 fork1+0x3ea sys/kern/kern_fork.c:405 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806bb557d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3813 #4 process_new+0x553 sys/kern/kern_fork.c:279 #5 fork1+0x3ea sys/kern/kern_fork.c:405 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 57689 (syslogd) thread 0xffff8000ffffdbe8 (281350) exclusive rrwlock inode r = 0 (0xfffffd806e1613d0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 14404K 14548K 166960K 13141 0 pcb 17 16K 17K 166960K 315 0 rtable 234 8K 8K 166960K 2367 0 pf 38 18K 20K 166960K 224 0 ifaddr 43 8K 8K 166960K 329 0 ifgroup 55 2K 2K 166960K 367 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 37K 166960K 228 0 ioctlops 0 0K 4K 166960K 1695 0 iov 0 0K 24K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1470 92K 93K 166960K 3201 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 24 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 107 0 dirhash 15 2K 2K 166960K 30 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 18 65K 93K 166960K 2112 0 sigio 0 0K 0K 166960K 29 0 proc 73 91K 128K 166960K 2396 0 subproc 104 6K 7K 166960K 923 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 148 0 in_multi 99 7K 7K 166960K 848 0 ether_multi 1 0K 0K 166960K 9 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 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1341 0 pfkey data 0 0K 1K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 73K 92K 166960K 17688 0 UVM aobj 55 5K 5K 166960K 59 0 pinsyscall 43 86K 108K 166960K 4855 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 64 0 NDP 12 0K 1K 166960K 240 0 temp 76 6824K 6936K 166960K 73660 0 kqueue 14 22K 26K 166960K 168 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 305 0 301 3 2 1 3 0 8 0 rtentry 112 845 0 738 4 0 4 4 0 8 0 unpcb 144 981 0 962 14 12 2 6 0 8 0 syncache 336 12 0 12 6 6 0 1 0 8 0 tcpqe 32 6 0 6 2 2 0 1 0 8 0 tcpcb 808 596 0 585 27 23 4 8 0 8 2 arp 120 147 0 129 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 2077 0 2060 47 44 3 13 0 8 0 nd6 136 229 0 203 1 0 1 1 0 8 0 pkpcb 40 42 0 42 3 3 0 1 0 8 0 kcovpl 48 71 0 63 1 0 1 1 0 8 0 ppxss 1168 12 0 12 4 4 0 1 0 8 0 pffrag 232 42 0 41 5 4 1 1 0 482 0 pffrnode 88 42 0 41 5 4 1 1 0 8 0 pffrent 40 210 0 209 4 3 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 pfstitem 24 209 0 145 1 0 1 1 0 8 0 pfstkey 128 339 0 276 3 0 3 3 0 8 0 pfstate 376 272 0 210 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 3387 0 2926 36 6 30 30 0 8 1 art_table 32 3390 0 2926 6 2 4 4 0 8 0 art_node 16 842 0 747 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 2 1 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 103 0 93 1 0 1 1 0 8 0 shmpl 112 56 0 5 2 0 2 2 0 8 0 shmpl: pool(0xffffffff83632670:shmpl): free list modified: page 0xfffffd8073076000; item ordinal 0; addr 0xfffffd80730760e8 (p 0xfffffd8073076000); offset 0x0=0x0 shmpl: pool(0xffffffff83632670:shmpl): page inconsistency: page 0xfffffd8073076000; item ordinal 1; addr 0x54cb4c9740004026 dirhash 1024 29 0 10 3 0 3 3 0 8 0 dino2pl 256 3640 0 2005 103 0 103 103 0 8 0 ffsino 272 3640 0 2005 110 0 110 110 0 8 0 nchpl 144 5348 0 4715 66 40 26 66 0 8 0 uvmvnodes 80 5167 0 0 106 0 106 106 0 8 0 vnodes 216 5167 0 0 288 0 288 288 0 8 0 namei 1024 25024 0 25024 5 4 1 2 0 8 1 percpumem 16 128 0 82 1 0 1 1 0 8 0 kstatmem 264 188 0 164 3 1 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 42434 0 42432 15 14 1 8 1 8 0 plimitpl 152 602 0 583 1 0 1 1 0 8 0 sigapl 424 2318 0 2267 10 1 9 9 0 8 2 futexpl 64 16451 0 16446 8 7 1 1 0 8 0 knotepl 120 428 0 0 10 0 10 10 0 8 0 kqueuepl 216 344 0 333 5 4 1 5 0 8 0 pipepl 320 497 0 469 6 3 3 6 0 8 0 fdescpl 496 2278 0 2246 5 0 5 5 0 8 0 filepl 152 12478 0 12215 38 27 11 16 0 8 0 lockfpl 104 349 0 344 1 0 1 1 0 8 0 lockfspl 48 157 0 153 1 0 1 1 0 8 0 sessionpl 144 96 0 87 1 0 1 1 0 8 0 pgrppl 48 179 0 162 1 0 1 1 0 8 0 ucredpl 104 1865 0 1852 1 0 1 1 0 8 0 zombiepl 144 2340 0 2339 2 1 1 1 0 8 0 processpl 1160 2318 0 2267 6 0 6 6 0 8 1 procpl 648 4093 0 4031 9 1 8 8 0 8 1 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 9 0 9 5 5 0 1 0 8 0 sockpl 664 3455 0 3414 49 44 5 15 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 254 0 0 29 1 28 29 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 624 0 0 31 0 31 31 0 8 0 bufpl 280 10353 0 4196 442 0 442 442 0 8 0 anonpl 24 387926 0 381790 111 51 60 84 0 185 18 amapchunkpl 152 57128 0 56561 49 13 36 37 0 158 12 amappl16 200 7346 0 7233 52 46 6 14 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 262 0 250 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 3924 0 3893 3 1 2 2 0 8 0 amappl11 160 63 0 49 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 122 0 121 2 1 1 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 250 0 238 1 0 1 1 0 8 0 amappl6 120 790 0 789 1 0 1 1 0 8 0 amappl5 112 398 0 386 1 0 1 1 0 8 0 amappl4 104 537 0 516 1 0 1 1 0 8 0 amappl3 96 10908 0 10802 5 1 4 4 0 8 1 amappl2 88 1651 0 1582 2 0 2 2 0 8 0 amappl1 80 19384 0 18815 16 2 14 16 0 8 0 amappl 88 16670 0 16493 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 3 0 3 2 2 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 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 58 0 4 1 0 1 1 0 8 0 uaddrrnd 24 2278 0 2246 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2278 0 2246 1 0 1 1 0 8 0 vmmpekpl 168 20587 0 20533 5 1 4 4 0 8 0 vmmpepl 168 148159 0 146203 134 43 91 97 0 357 5 vmsppl 440 2277 0 2246 6 2 4 5 0 8 0 rwobjpl 56 49068 0 42828 92 4 88 88 0 8 0 pdppl 4096 4563 0 4492 185 112 73 85 0 8 2 pvpl 32 30520 0 0 245 0 245 245 0 265 0 pmappl 248 2277 0 2246 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 601 0 206 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834b2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff83553580) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83553580) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0b41a0,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7cca7f28be00, count: 9 ddb{0}> trace x86_ipi_db(ffffffff834b2ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff83553580) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83553580) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0b41a0,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7cca7f28be00, 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:437 panic(ffffffff830138e0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83632670,1,ffff80002a0d7e58) at pool_do_get+0x59d pool_get(ffffffff83632670,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffff71d8,ffff80002a0d80b0,0,ffff80002a0d8000) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff71d8,ffff80002a0d80b0,ffff80002a0d8000) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0d80b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d80b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf81a615e00, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830138e0) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83632670,1,ffff80002a0d7e58) at pool_do_get+0x59d pool_get(ffffffff83632670,1) at pool_get+0x141 shmget_allocate_segment(ffff8000ffff71d8,ffff80002a0d80b0,0,ffff80002a0d8000) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff71d8,ffff80002a0d80b0,ffff80002a0d8000) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:480 syscall(ffff80002a0d80b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a0d80b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf81a615e00, count: -8