panic: pool_do_get: shmpl free list modified: page 0xfffffd805f74c000; item addr 0xfffffd805f74ce00; offset 0x40=0x6880e704 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *517107 15217 32767 0x10 0x4000000 1K syz-executor 331634 95435 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83417461) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839aa3f8,1,ffff80003c45b1c8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839aa3f8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c478550,ffff80003c45b420,0,ffff80003c45b370) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c478550,ffff80003c45b420,ffff80003c45b370) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c45b420) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b420) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd966febeeb0, 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 0xfffffd805f74c000; item addr 0xfffffd805f74ce00; offset 0x40=0x6880e704 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83417461) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839aa3f8,1,ffff80003c45b1c8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839aa3f8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c478550,ffff80003c45b420,0,ffff80003c45b370) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c478550,ffff80003c45b420,ffff80003c45b370) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c45b420) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b420) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd966febeeb0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c45aff0 rbx 0xffff8000299deddf rdx 0xffff800001440bc0 rcx 0xffff80003c478550 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3be1df1ddca7fbd3 r11 0x9937797eccb797a4 r12 0xffff8000299debe0 r13 0 r14 0 r15 0x1 rip 0xffffffff8228d3d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45afe0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=517107 pid=15217 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=0xffff80003c4782c0,0xffff80003c478040 process=0xffff80003c04fab0 user=0xffff80003c456000, vmspace=0xfffffd800eb03b98 estcpu=9, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16589 496094 91132 32767 2 0x10 syz-executor 15217 491202 71281 32767 2 0x10 syz-executor *15217 517107 71281 32767 7 0x4000010 syz-executor 6160 466668 12784 32767 3 0x3010 suspend syz-executor 6160 53005 12784 32767 2 0x4081090 syz-executor 6160 252011 12784 32767 2 0x4081090 syz-executor 95435 57835 23809 32767 2 0x10 syz-executor 95435 331634 23809 32767 7 0x4000010 syz-executor 95435 467276 23809 32767 3 0x4000090 fsleep syz-executor 95435 307948 23809 32767 3 0x4000090 fsleep syz-executor 76900 510455 85575 32767 4 0x82010 syz-executor 76900 275119 85575 32767 3 0x4002010 suspend syz-executor 76900 378538 85575 32767 2 0x4082010 syz-executor 16099 144444 7574 32767 2 0xc90 syz-executor 16099 177301 7574 32767 3 0x4000090 ttyout syz-executor 16099 512621 7574 32767 3 0x4000090 fsleep syz-executor 16099 1364 7574 32767 3 0x4000090 fsleep syz-executor 16099 514724 7574 32767 3 0x4000090 fsleep syz-executor 50636 281367 0 0 3 0x14200 bored sosplice 23809 434111 2799 32767 2 0xc90 syz-executor 85263 220394 42104 32767 2 0xc90 syz-executor 71281 95710 22565 32767 3 0x90 nanoslp syz-executor 91132 512777 29779 32767 3 0x90 nanoslp syz-executor 12784 165228 61579 32767 2 0xc90 syz-executor 85575 287339 69696 32767 2 0xc90 syz-executor 15030 436449 1726 32767 2 0x10 syz-executor 7574 520295 13181 32767 3 0x90 nanoslp syz-executor 42104 44835 10240 0 3 0x82 wait syz-executor 61579 62788 10240 0 3 0x82 wait syz-executor 69696 432719 10240 0 3 0x82 wait syz-executor 1726 227958 10240 0 3 0x82 wait syz-executor 13181 231091 10240 0 3 0x82 wait syz-executor 29779 63783 10240 0 3 0x82 wait syz-executor 22565 219203 10240 0 3 0x82 wait syz-executor 2799 197934 10240 0 3 0x82 wait syz-executor 10240 147548 24848 0 3 0x82 kqread syz-executor 24848 257790 10809 0 3 0x10008a sigsusp ksh 10809 394604 73784 0 3 0x98 kqread sshd-session 73784 196704 62898 0 3 0x92 kqread sshd-session 301 209284 1 0 3 0x100083 ttyin getty 62898 226158 1 0 3 0x88 kqread sshd 87972 498814 544 73 3 0x1100090 kqread syslogd 544 507178 1 0 3 0x100082 sbwait syslogd 98512 412128 1 0 3 0x100080 kqread resolvd 35978 2658 67429 77 3 0x100092 kqread dhcpleased 75838 490095 67429 77 3 0x100092 kqread dhcpleased 67429 482795 1 0 3 0x80 kqread dhcpleased 57623 67100 0 0 3 0x14200 bored smr 37016 99375 0 0 2 0x14200 zerothread 3113 408859 0 0 3 0x14200 aiodoned aiodoned 89636 112889 0 0 3 0x14200 syncer update 30670 74115 0 0 3 0x14200 cleaner cleaner 96689 22467 0 0 3 0x14200 reaper reaper 65994 234189 0 0 3 0x14200 pgdaemon pagedaemon 98543 235294 0 0 3 0x14200 bored viomb 68061 184215 0 0 3 0x40014200 acpi0 acpi0 70713 391616 0 0 3 0x40014200 idle1 79208 485649 0 0 3 0x14200 bored softnet7 81200 466126 0 0 3 0x14200 bored softnet6 38550 381362 0 0 3 0x14200 bored softnet5 9376 325232 0 0 3 0x14200 bored softnet4 44269 522627 0 0 3 0x14200 bored softnet3 18892 190955 0 0 3 0x14200 bored softnet2 41288 192416 0 0 3 0x14200 bored softnet1 41351 344197 0 0 2 0x14200 softnet0 78395 258228 0 0 3 0x14200 bored systqmp 4717 208052 0 0 3 0x14200 bored systq 45169 53699 0 0 3 0x14200 tmoslp softclockmp 53913 491547 0 0 2 0x40014200 softclock 16019 373915 0 0 3 0x40014200 idle0 1 205837 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 (0xffffffff839aa410) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #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:748 #7 Xsyscall+0x128 Process 15217 (syz-executor) thread 0xffff80003c478550 (517107) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a1f2a8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839aa410) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #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:748 #7 Xsyscall+0x128 Process 95435 (syz-executor) thread 0xffff80003c048cf8 (331634) shared rwlock vmmaplk r = 0 (0xfffffd800eb03310) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:412 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x57 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 15030 (syz-executor) thread 0xffff8000ffff22a0 (436449) exclusive rrwlock inode r = 0 (0xfffffd800eb0da20) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 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+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80716b9eb0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 10956K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 213 6K 6K 166960K 266 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 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1358 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 129K 166960K 201 0 proc 59 115K 147K 166960K 475 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 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 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 344 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 261 160K 174K 166960K 3310 0 UVM aobj 6 2K 3K 166960K 7 0 pinsyscall 46 92K 114K 166960K 1203 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 11 0K 2K 166960K 27 0 temp 35 8670K 8734K 166960K 3904 0 kqueue 13 20K 22K 166960K 27 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 70 0 67 2 0 2 2 0 8 1 rtentry 176 99 0 1 5 0 5 5 0 8 0 unpcb 144 128 0 112 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 91 0 87 7 0 7 7 0 8 6 arp 128 13 0 0 1 0 1 1 0 8 0 inpcb 328 174 0 165 7 0 7 7 0 8 5 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 5 0 3 1 0 1 1 0 8 0 nd6 144 17 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 256 453 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 99 0 11 1 0 1 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 1 1 0 1 1 0 8 0 pool(0xffffffff839aa3f8:shmpl): page inconsistency: page 0xfffffd805f74c000; 31 on list, 3 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1622 0 115 95 0 95 95 0 8 0 ffsino 296 1622 0 115 117 0 117 117 0 8 0 nchpl 144 1888 0 212 63 0 63 63 0 8 0 uvmvnodes 80 1703 0 0 35 0 35 35 0 8 0 vnodes 216 1703 0 0 95 0 95 95 0 8 0 namei 1024 5550 0 5549 2 0 2 2 0 8 1 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6713 0 6713 3 1 2 2 1 8 2 plimitpl 152 43 0 19 2 0 2 2 0 8 1 sigapl 424 479 0 419 8 0 8 8 0 8 1 knotepl 120 296 0 0 9 0 9 9 0 8 0 kqueuepl 224 39 0 29 2 0 2 2 0 8 0 pipepl 344 99 0 72 3 0 3 3 0 8 0 fdescpl 528 456 0 419 4 0 4 4 0 8 0 filepl 160 1823 0 1600 14 0 14 14 0 8 4 lockfpl 104 20 0 17 1 0 1 1 0 8 0 lockfspl 48 11 0 8 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 29 0 5 1 0 1 1 0 8 0 ucredpl 104 190 0 171 1 0 1 1 0 8 0 zombiepl 144 420 0 419 1 0 1 1 0 8 0 processpl 1248 479 0 419 7 1 6 6 0 8 0 procpl 656 592 0 520 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 752 376 0 347 13 0 13 13 0 8 9 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 249 0 0 16 0 16 16 0 8 0 bufpl 280 2958 0 116 203 0 203 203 0 8 0 anonpl 32 4459 0 0 36 0 36 36 0 246 0 amapchunkpl 152 9808 0 9214 33 3 30 30 0 158 6 amappl16 200 1988 0 1893 5 0 5 5 0 8 0 amappl15 192 50 0 50 1 1 0 1 0 8 0 amappl14 184 100 0 90 1 0 1 1 0 8 0 amappl13 176 5 0 4 1 0 1 1 0 8 0 amappl12 168 1051 0 1015 2 0 2 2 0 8 0 amappl11 160 74 0 64 1 0 1 1 0 8 0 amappl10 152 8 0 8 1 0 1 1 0 8 1 amappl9 144 279 0 279 1 0 1 1 0 8 1 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 107 0 97 1 0 1 1 0 8 0 amappl6 120 202 0 199 1 0 1 1 0 8 0 amappl5 112 114 0 107 1 0 1 1 0 8 0 amappl4 104 253 0 238 1 0 1 1 0 8 0 amappl3 96 1587 0 1451 4 0 4 4 0 8 0 amappl2 88 613 0 555 2 0 2 2 0 8 0 amappl1 80 8015 0 7440 14 0 14 14 0 8 0 amappl 88 2681 0 2485 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 6 0 1 1 0 1 1 0 8 0 uaddrrnd 24 456 0 419 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 456 0 419 1 0 1 1 0 8 0 vmmpekpl 168 5144 0 5108 2 0 2 2 0 8 0 vmmpepl 168 35489 0 33296 98 0 98 98 0 357 1 vmsppl 488 455 0 419 7 1 6 6 0 8 0 rwobjpl 80 14209 0 11557 55 0 55 55 0 8 0 pdppl 4096 920 0 838 112 26 86 100 0 8 4 pvpl 32 11712 0 0 95 0 95 95 0 265 0 pmappl 256 455 0 419 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 29 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f7ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83a1f0a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a1f0a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 sys_kevent(ffff80003c048cf8,ffff80003c48bd10,ffff80003c48bc60) at sys_kevent+0x4cd sys/kern/kern_event.c:1282 syscall(ffff80003c48bd10) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48bd10) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe75d9a66320, count: 3 ddb{0}> trace x86_ipi_db(ffffffff837f7ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83a1f0a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a1f0a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 sys_kevent(ffff80003c048cf8,ffff80003c48bd10,ffff80003c48bc60) at sys_kevent+0x4cd sys/kern/kern_event.c:1282 syscall(ffff80003c48bd10) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48bd10) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe75d9a66320, count: -12 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(ffffffff83417461) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839aa3f8,1,ffff80003c45b1c8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839aa3f8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c478550,ffff80003c45b420,0,ffff80003c45b370) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c478550,ffff80003c45b420,ffff80003c45b370) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c45b420) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b420) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd966febeeb0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83417461) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839aa3f8,1,ffff80003c45b1c8) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff839aa3f8,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c478550,ffff80003c45b420,0,ffff80003c45b370) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c478550,ffff80003c45b420,ffff80003c45b370) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80003c45b420) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45b420) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd966febeeb0, count: -8