panic: pool_do_get: shmpl free list modified: page 0xfffffd806bc01000; item addr 0xfffffd806bc01a10; offset 0x40=0x67aaa578 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 124124 90848 0 0 0 1 syz-executor *467826 59135 60929 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a1e7d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83904180,1,ffff800037ccc7b8) at pool_do_get+0x5da pool_get(ffffffff83904180,1) at pool_get+0x149 shmget_allocate_segment(ffff800036cc5980,ffff800037ccca10,f0,ffff800037ccc960) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800036cc5980,ffff800037ccca10,ffff800037ccc960) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800037ccca10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ccca10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2968b87c1e0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_do_get: shmpl free list modified: page 0xfffffd806bc01000; item addr 0xfffffd806bc01a10; offset 0x40=0x67aaa578 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a1e7d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83904180,1,ffff800037ccc7b8) at pool_do_get+0x5da pool_get(ffffffff83904180,1) at pool_get+0x149 shmget_allocate_segment(ffff800036cc5980,ffff800037ccca10,f0,ffff800037ccc960) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800036cc5980,ffff800037ccca10,ffff800037ccc960) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800037ccca10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ccca10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2968b87c1e0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800037ccc5f0 rbx 0xffffffff837e4dc7 cpu_info_full_primary+0x2dc7 rdx 0xffff80000144de00 rcx 0xffff800036cc5980 rax 0xffffffff837e3ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x41fba085dfae35e3 r11 0x3161495046bc9ba6 r12 0xffffffff837e4bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff8162a2e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037ccc5e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=467826 pid=59135 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=0xffff800036cc4a50,0xffff800036cc4040 process=0xffff80002f8a5018 user=0xffff800037cc7000, vmspace=0xfffffd806bc7d740 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90848 124124 55837 0 7 0 syz-executor 90848 372624 55837 0 3 0x4000080 fsleep syz-executor 41896 238634 78759 0 2 0 syz-executor 41896 255631 78759 0 3 0x4000080 fsleep syz-executor 74600 392648 7342 0 3 0x3000 suspend syz-executor 74600 259759 7342 0 2 0x4081000 syz-executor 74600 476141 7342 0 2 0x4081000 syz-executor 59135 290148 85148 60929 2 0x10 syz-executor *59135 467826 85148 60929 7 0x4000010 syz-executor 90273 377568 24756 60929 3 0x90 nanoslp syz-executor 90273 87972 24756 60929 3 0x4000090 ttyin syz-executor 90273 53406 24756 60929 3 0x4000090 fsleep syz-executor 18237 80346 23675 0 2 0x1000000 syz-executor 18237 101919 23675 0 3 0x5000080 sbwait syz-executor 18237 467192 23675 0 3 0x5000080 fsleep syz-executor 77087 38233 68607 0 3 0x80 nanoslp syz-executor 77087 429140 68607 0 3 0x4000080 lockf syz-executor 77087 233868 68607 0 3 0x4000080 fsleep syz-executor 23675 68269 83352 0 3 0x82 nanoslp syz-executor 85148 135206 83352 0 3 0x82 nanoslp syz-executor 67152 271174 83352 0 3 0x2 biowait syz-executor 7342 471028 83352 0 3 0x82 nanoslp syz-executor 24756 326015 83352 0 3 0x82 nanoslp syz-executor 68607 250941 83352 0 3 0x82 nanoslp syz-executor 55837 180968 83352 0 3 0x82 nanoslp syz-executor 78759 313258 83352 0 3 0x82 nanoslp syz-executor 83352 451679 3145 0 3 0x82 kqread syz-executor 3145 238072 42472 0 3 0x10008a sigsusp ksh 42472 370774 52960 0 3 0x98 kqread sshd-session 52960 447630 5071 0 3 0x92 kqread sshd-session 46767 366611 1 0 3 0x100083 ttyin getty 5071 267298 1 0 3 0x88 kqread sshd 99461 492931 62931 74 3 0x1100092 bpf pflogd 62931 299425 1 0 3 0x80 sbwait pflogd 30569 499837 59535 73 3 0x1100090 kqread syslogd 59535 438785 1 0 3 0x100082 sbwait syslogd 39547 14179 1 0 3 0x100080 kqread resolvd 39046 4897 74765 77 3 0x100092 kqread dhcpleased 99297 74484 74765 77 3 0x100092 kqread dhcpleased 74765 96359 1 0 3 0x80 kqread dhcpleased 1742 117944 0 0 3 0x14200 bored smr 69628 355653 0 0 2 0x14200 zerothread 37913 138434 0 0 3 0x14200 aiodoned aiodoned 60982 232468 0 0 3 0x14200 syncer update 61425 485189 0 0 3 0x14200 cleaner cleaner 16830 331937 0 0 3 0x14200 reaper reaper 65009 342031 0 0 3 0x14200 pgdaemon pagedaemon 42819 117778 0 0 3 0x14200 bored viomb 60496 109296 0 0 3 0x40014200 acpi0 acpi0 16489 55143 0 0 3 0x40014200 idle1 26284 13517 0 0 3 0x14200 bored softnet3 25014 411371 0 0 3 0x14200 bored softnet2 79769 5459 0 0 3 0x14200 bored softnet1 25731 46059 0 0 3 0x14200 bored softnet0 58685 277073 0 0 3 0x14200 bored systqmp 54432 474991 0 0 3 0x14200 bored systq 94185 516926 0 0 3 0x14200 tmoslp softclockmp 63472 323031 0 0 3 0x40014200 tmoslp softclock 15993 406703 0 0 3 0x40014200 idle0 1 295916 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex shmpl r = 0 (0xffffffff83904198) #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 90848 (syz-executor) thread 0xffff800036cc4f60 (124124) exclusive rwlock uobjlk r = 0 (0xfffffd806d052860) #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_lower_lookup+0x53 sys/uvm/uvm_fault.c:1175 #3 uvm_fault_lower+0x86 sys/uvm/uvm_fault.c:1310 #4 uvm_fault+0x272 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807eb8b490) #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 59135 (syz-executor) thread 0xffff800036cc5980 (467826) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838a67b8) #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 (0xffffffff83904198) #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 67152 (syz-executor) thread 0xffff8000ffff87b8 (271174) exclusive rrwlock inode r = 0 (0xfffffd806bd56ca8) #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:1851 #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 (0xfffffd806bd56500) #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:1851 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 11087K 11346K 166960K 11368 0 pcb 17 12K 12K 166960K 27 0 rtable 238 7K 7K 166960K 377 0 pf 34 17K 18K 166960K 51 0 ifaddr 43 7K 7K 166960K 49 0 ifgroup 55 2K 2K 166960K 65 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 74 0 ioctlops 0 0K 4K 166960K 1487 0 iov 0 0K 12K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1400 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 89K 166960K 186 0 sigio 0 0K 0K 166960K 2 0 proc 72 91K 128K 166960K 534 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 12 0 in_multi 99 7K 7K 166960K 110 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 381 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 222 72K 73K 166960K 3307 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 42 84K 102K 166960K 1297 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 30 0 temp 35 8630K 8695K 166960K 4235 0 kqueue 13 20K 22K 166960K 30 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 120 103 0 99 3 0 3 3 0 8 2 rtentry 112 121 0 10 4 0 4 4 0 8 0 unpcb 144 79 0 55 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 17 0 11 1 0 1 1 0 8 0 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 376 109 0 99 2 0 2 2 0 8 0 nd6 136 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 3 0 3 1 0 1 1 0 8 1 pppxif 1472 3 0 3 1 0 1 1 0 8 1 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 19 0 0 1 0 1 1 0 8 0 pfstkey 128 19 0 0 1 0 1 1 0 8 0 pfstate 376 19 0 0 2 0 2 2 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 476 0 21 30 0 30 30 0 8 0 art_table 32 477 0 21 4 0 4 4 0 8 0 art_node 16 120 0 19 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 4 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 pool(0xffffffff83904180:shmpl): page inconsistency: page 0xfffffd806bc01000; 29 on list, 5 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1649 0 137 95 0 95 95 0 8 0 ffsino 280 1649 0 137 109 0 109 109 0 8 0 nchpl 144 1910 0 219 63 0 63 63 0 8 0 uvmvnodes 80 1764 0 0 36 0 36 36 0 8 0 vnodes 216 1764 0 0 98 0 98 98 0 8 0 namei 1024 5938 0 5938 1 0 1 1 0 8 1 percpumem 16 51 0 5 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scxspl 216 6115 0 6114 3 2 1 2 1 8 0 plimitpl 152 31 0 12 1 0 1 1 0 8 0 sigapl 424 494 0 445 8 1 7 7 0 8 1 futexpl 64 1019 0 1014 1 0 1 1 0 8 0 knotepl 120 300 0 0 10 0 10 10 0 8 0 kqueuepl 216 34 0 25 1 0 1 1 0 8 0 pipepl 328 114 0 87 3 0 3 3 0 8 0 fdescpl 504 476 0 445 5 0 5 5 0 8 0 filepl 152 1827 0 1591 12 0 12 12 0 8 2 lockfpl 104 35 0 31 1 0 1 1 0 8 0 lockfspl 48 15 0 12 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 136 0 121 1 0 1 1 0 8 0 zombiepl 144 446 0 445 1 0 1 1 0 8 0 processpl 1168 494 0 445 5 0 5 5 0 8 1 procpl 648 584 0 524 7 1 6 6 0 8 0 sockpl 688 291 0 253 10 0 10 10 0 8 6 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 2456 0 0 154 0 154 154 0 8 0 bufpl 280 2354 0 129 159 0 159 159 0 8 0 anonpl 24 105127 0 101773 25 1 24 25 0 184 3 amapchunkpl 152 9957 0 9477 22 0 22 22 0 158 2 amappl16 200 2061 0 2037 5 1 4 5 0 8 2 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 114 0 101 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 1132 0 1100 3 1 2 2 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 183 0 180 1 0 1 1 0 8 0 amappl5 112 137 0 128 1 0 1 1 0 8 0 amappl4 104 320 0 301 1 0 1 1 0 8 0 amappl3 96 1640 0 1529 4 0 4 4 0 8 1 amappl2 88 645 0 585 2 0 2 2 0 8 0 amappl1 80 7936 0 7363 14 0 14 14 0 8 2 amappl 88 2931 0 2765 5 0 5 5 0 92 1 dma4096 4096 3 0 3 2 1 1 1 0 8 1 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 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 476 0 445 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 476 0 445 1 0 1 1 0 8 0 vmmpekpl 168 5588 0 5556 2 0 2 2 0 8 0 vmmpepl 168 35718 0 33861 84 0 84 84 0 357 0 vmsppl 456 475 0 445 5 0 5 5 0 8 1 rwobjpl 64 15051 0 12366 44 0 44 44 0 8 0 pdppl 4096 960 0 890 102 30 72 84 0 8 2 pvpl 32 9738 0 0 79 0 79 79 0 265 0 pmappl 248 475 0 445 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 424 0 32 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff833a1e7d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83904180,1,ffff800037ccc7b8) at pool_do_get+0x5da pool_get(ffffffff83904180,1) at pool_get+0x149 shmget_allocate_segment(ffff800036cc5980,ffff800037ccca10,f0,ffff800037ccc960) at shmget_allocate_segment+0x1a7 sys_shmget(ffff800036cc5980,ffff800037ccca10,ffff800037ccc960) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff800037ccca10) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037ccca10) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2968b87c1e0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029aabff0) 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(ffffffff838a65b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838a65b0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 uvm_fault(fffffd807eb8b390,cbaa2d1f000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691 upageflttrap(ffff80003c51eb90,cbaa2d1f000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c51eb90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74e576bea430, count: 7 ddb{1}> trace x86_ipi_db(ffff800029aabff0) 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(ffffffff838a65b0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838a65b0) at __mp_lock+0x199 sys/kern/kern_lock.c:144 uvm_fault(fffffd807eb8b390,cbaa2d1f000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691 upageflttrap(ffff80003c51eb90,cbaa2d1f000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80003c51eb90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74e576bea430, count: -8