panic: pool_do_get: shmpl free list modified: page 0xfffffd800b2d1000; item addr 0xfffffd800b2d1e70; offset 0x40=0x67b461e2 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 124971 12382 32767 0x10 0 0 syz-executor *137677 69220 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a730e) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83990df8,2,ffff80003c520148) at pool_do_get+0x5da pool_get(ffffffff83990df8,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff42b8,ffff80003c5203a0,112,ffff80003c5202f0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff42b8,ffff80003c5203a0,ffff80003c5202f0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c5203a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5203a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaae955c25d0, 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 0xfffffd800b2d1000; item addr 0xfffffd800b2d1e70; offset 0x40=0x67b461e2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a730e) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83990df8,2,ffff80003c520148) at pool_do_get+0x5da pool_get(ffffffff83990df8,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff42b8,ffff80003c5203a0,112,ffff80003c5202f0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff42b8,ffff80003c5203a0,ffff80003c5202f0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c5203a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5203a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaae955c25d0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c51ff80 rbx 0xffff800029aacdc7 rdx 0 rcx 0xffff8000ffff42b8 rax 0xffff800029aabff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x185aea03513cecf r11 0xc3778b6cda3faa89 r12 0xffff800029aacbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff821caf25 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c51ff70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=137677 pid=69220 tcnt=2 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=0xffff8000ffff54a8,0xffff80003c54a2d0 process=0xffff8000ffff04b8 user=0xffff80003c51b000, vmspace=0xfffffd806be1eca8 estcpu=16, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74050 365049 13854 32767 2 0x10 syz-executor 27411 339609 64940 32767 2 0x10 syz-executor 39862 451826 49902 32767 2 0x10 syz-executor 12382 124971 88099 32767 7 0x10 syz-executor 12382 97743 88099 32767 3 0x4000090 fsleep syz-executor 50296 191272 91156 32767 2 0x10 syz-executor 50296 301304 91156 32767 3 0x4000090 ttyout syz-executor 69220 235373 74831 32767 2 0x10 syz-executor *69220 137677 74831 32767 7 0x4000010 syz-executor 99031 305997 60607 32767 3 0x90 nanoslp syz-executor 99031 94996 60607 32767 3 0x4000090 lockf syz-executor 99031 47500 60607 32767 3 0x4000090 fsleep syz-executor 99031 189278 60607 32767 3 0x4000090 fsleep syz-executor 84722 501527 0 0 3 0x14200 bored sosplice 91156 377798 16128 32767 3 0x90 nanoslp syz-executor 64940 397914 94197 32767 3 0x90 nanoslp syz-executor 88099 400524 40232 32767 3 0x90 nanoslp syz-executor 96932 478107 92682 32767 3 0x10 biowait syz-executor 60607 199492 56258 32767 3 0x90 nanoslp syz-executor 49902 510752 45848 32767 3 0x90 nanoslp syz-executor 13854 371654 50027 32767 3 0x90 nanoslp syz-executor 74831 104301 95750 32767 3 0x90 nanoslp syz-executor 16128 250515 55451 0 3 0x82 wait syz-executor 40232 107803 55451 0 3 0x82 wait syz-executor 56258 503524 55451 0 3 0x82 wait syz-executor 92682 332439 55451 0 3 0x82 wait syz-executor 45848 410111 55451 0 3 0x82 wait syz-executor 94197 341445 55451 0 3 0x82 wait syz-executor 50027 517845 55451 0 3 0x82 wait syz-executor 95750 164363 55451 0 3 0x82 wait syz-executor 55451 405482 13672 0 3 0x82 kqread syz-executor 13672 111074 58009 0 3 0x10008a sigsusp ksh 58009 225893 21175 0 3 0x98 kqread sshd-session 21175 289904 25835 0 3 0x92 kqread sshd-session 25830 396186 1 0 3 0x100083 ttyin getty 25835 102496 1 0 3 0x88 kqread sshd 47900 376044 97514 73 3 0x1100090 kqread syslogd 97514 170957 1 0 3 0x100082 sbwait syslogd 46869 282954 1 0 3 0x100080 kqread resolvd 48207 131687 14037 77 3 0x100092 kqread dhcpleased 76542 414146 14037 77 3 0x100092 kqread dhcpleased 14037 152069 1 0 3 0x80 kqread dhcpleased 80132 46704 0 0 3 0x14200 bored smr 15677 28840 0 0 2 0x14200 zerothread 58778 169489 0 0 3 0x14200 aiodoned aiodoned 23463 494115 0 0 3 0x14200 syncer update 24019 73539 0 0 3 0x14200 cleaner cleaner 64322 107811 0 0 3 0x14200 reaper reaper 26076 39145 0 0 3 0x14200 pgdaemon pagedaemon 59541 374308 0 0 3 0x14200 bored viomb 5506 425398 0 0 3 0x40014200 acpi0 acpi0 48528 105618 0 0 3 0x40014200 idle1 81172 518580 0 0 3 0x14200 bored softnet3 17962 265678 0 0 3 0x14200 bored softnet2 4576 8123 0 0 3 0x14200 bored softnet1 50299 280069 0 0 3 0x14200 bored softnet0 78629 246000 0 0 3 0x14200 bored systqmp 179 515069 0 0 3 0x14200 bored systq 85655 251096 0 0 3 0x14200 tmoslp softclockmp 81948 312591 0 0 3 0x40014200 tmoslp softclock 96117 74004 0 0 3 0x40014200 idle0 1 20810 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 (0xffffffff83990e10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 12382 (syz-executor) thread 0xffff80003c54b9d0 (124971) exclusive rwlock uobjlk r = 0 (0xfffffd807e028b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault+0x1e9 sys/uvm/uvm_fault.c:690 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806be1ebe0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1864 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:732 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 69220 (syz-executor) thread 0xffff8000ffff42b8 (137677) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838fa378) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83990e10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_get+0x10b sys/kern/subr_pool.c:583 #4 shmget_allocate_segment+0x1a7 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 96932 (syz-executor) thread 0xffff80002a359498 (478107) exclusive rrwlock inode r = 0 (0xfffffd806b5f5f18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b5f5e00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1866 #12 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 10954K 10966K 166960K 11270 0 pcb 17 12K 12K 166960K 17 0 rtable 238 6K 6K 166960K 350 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 16K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1332 84K 84K 166960K 1354 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 214 0 sigio 0 0K 0K 166960K 3 0 proc 58 79K 103K 166960K 477 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 0 0K 0K 166960K 17 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 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 348 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 218 73K 75K 166960K 3174 0 UVM aobj 4 2K 2K 166960K 5 0 pinsyscall 46 92K 116K 166960K 1209 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 11 0K 2K 166960K 27 0 temp 43 8632K 8696K 166960K 3981 0 kqueue 14 22K 29K 166960K 48 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 37 0 34 1 0 1 1 0 8 0 rtentry 112 113 0 1 4 0 4 4 0 8 0 unpcb 144 183 0 166 5 1 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 29 0 25 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 376 123 0 116 2 0 2 2 0 8 1 nd6 136 26 0 0 1 0 1 1 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 256 456 0 0 29 0 29 29 0 8 0 art_table 32 457 0 0 4 0 4 4 0 8 0 art_node 16 112 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 pool(0xffffffff83990df8:shmpl): page inconsistency: page 0xfffffd800b2d1000; 33 on list, 1 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1658 0 156 95 0 95 95 0 8 0 ffsino 280 1658 0 156 108 0 108 108 0 8 0 nchpl 144 1929 0 256 63 0 63 63 0 8 0 uvmvnodes 80 1739 0 0 36 0 36 36 0 8 0 vnodes 216 1739 0 0 97 0 97 97 0 8 0 namei 1024 5825 0 5825 3 1 2 2 0 8 2 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6525 0 6524 11 9 2 8 1 8 1 plimitpl 152 50 0 26 2 0 2 2 0 8 1 sigapl 424 486 0 430 8 0 8 8 0 8 0 futexpl 64 1202 0 1199 1 0 1 1 0 8 0 knotepl 120 290 0 0 9 0 9 9 0 8 0 kqueuepl 216 54 0 44 1 0 1 1 0 8 0 pipepl 328 112 0 85 4 1 3 3 0 8 0 fdescpl 504 467 0 430 7 1 6 6 0 8 0 filepl 152 1948 0 1736 12 0 12 12 0 8 3 lockfpl 104 32 0 28 1 0 1 1 0 8 0 lockfspl 48 14 0 11 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 30 0 6 1 0 1 1 0 8 0 ucredpl 104 219 0 200 1 0 1 1 0 8 0 zombiepl 144 430 0 430 2 1 1 1 0 8 1 processpl 1176 486 0 430 5 0 5 5 0 8 0 procpl 656 612 0 550 7 0 7 7 0 8 0 sockpl 688 347 0 320 9 0 9 9 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 194 0 0 13 0 13 13 0 8 0 bufpl 280 2327 0 124 158 0 158 158 0 8 0 anonpl 24 98916 0 95909 26 3 23 23 0 184 2 amapchunkpl 152 9934 0 9460 30 1 29 29 0 158 6 amappl16 200 1863 0 1846 5 0 5 5 0 8 3 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 127 0 117 1 0 1 1 0 8 0 amappl13 176 36 0 36 2 2 0 1 0 8 0 amappl12 168 1059 0 1025 2 0 2 2 0 8 0 amappl11 160 110 0 100 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 1 0 1 0 8 0 amappl9 144 246 0 246 2 1 1 1 0 8 1 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 94 0 84 1 0 1 1 0 8 0 amappl6 120 192 0 189 2 1 1 1 0 8 0 amappl5 112 133 0 127 1 0 1 1 0 8 0 amappl4 104 273 0 259 1 0 1 1 0 8 0 amappl3 96 1616 0 1506 4 0 4 4 0 8 0 amappl2 88 599 0 545 2 0 2 2 0 8 0 amappl1 80 7512 0 6965 15 1 14 14 0 8 1 amappl 88 2845 0 2675 5 0 5 5 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 467 0 430 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 467 0 430 1 0 1 1 0 8 0 vmmpekpl 168 5228 0 5193 2 0 2 2 0 8 0 vmmpepl 168 34795 0 32854 93 2 91 91 0 357 2 vmsppl 456 466 0 430 7 1 6 6 0 8 0 rwobjpl 64 14208 0 11659 42 0 42 42 0 8 0 pdppl 4096 942 0 860 122 36 86 98 0 8 4 pvpl 32 10972 0 0 89 0 89 89 0 265 0 pmappl 248 466 0 430 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 301 0 40 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b6ff0) 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(ffffffff838fa170) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838fa170) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002fcae9b0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838fa170) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838fa170) at __mp_lock+0x19e sys/kern/kern_lock.c:144 uvm_fault(fffffd806be1eae0,d65d15fa000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691 upageflttrap(ffff80002fcaed40,d65d15fa000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002fcaed40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f1567f3b960, count: 4 ddb{0}> trace x86_ipi_db(ffffffff837b6ff0) 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(ffffffff838fa170) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838fa170) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002fcae9b0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838fa170) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838fa170) at __mp_lock+0x19e sys/kern/kern_lock.c:144 uvm_fault(fffffd806be1eae0,d65d15fa000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691 upageflttrap(ffff80002fcaed40,d65d15fa000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002fcaed40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f1567f3b960, 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(ffffffff833a730e) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83990df8,2,ffff80003c520148) at pool_do_get+0x5da pool_get(ffffffff83990df8,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff42b8,ffff80003c5203a0,112,ffff80003c5202f0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff42b8,ffff80003c5203a0,ffff80003c5202f0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c5203a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5203a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaae955c25d0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a730e) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83990df8,2,ffff80003c520148) at pool_do_get+0x5da pool_get(ffffffff83990df8,2) at pool_get+0x149 shmget_allocate_segment(ffff8000ffff42b8,ffff80003c5203a0,112,ffff80003c5202f0) at shmget_allocate_segment+0x1a7 sys_shmget(ffff8000ffff42b8,ffff80003c5203a0,ffff80003c5202f0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c5203a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5203a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaae955c25d0, count: -8