panic: pool_do_get: shmpl free list modified: page 0xfffffd8061555000; item addr 0xfffffd80615554d0; offset 0x40=0x689ec7f7 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 37152 91629 32767 0x10 0x4000000 0K syz-executor 436155 6207 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83367833) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83940778,2,ffff800039443728) at pool_do_get+0x5df pool_get(ffffffff83940778,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e42b8,ffff800039443980,160,ffff8000394438d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e42b8,ffff800039443980,ffff8000394438d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039443980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039443980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54ec804a4e0, 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 0xfffffd8061555000; item addr 0xfffffd80615554d0; offset 0x40=0x689ec7f7 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83367833) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83940778,2,ffff800039443728) at pool_do_get+0x5df pool_get(ffffffff83940778,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e42b8,ffff800039443980,160,ffff8000394438d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e42b8,ffff800039443980,ffff8000394438d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039443980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039443980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54ec804a4e0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800039443550 rbx 0xffffffff8383addf cpu_info_full_primary+0x2ddf rdx 0xffff80000145e7c0 rcx 0xffff80002a2e42b8 rax 0xffffffff83839ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8ca8e5387f1596a4 r11 0x765123b7b71e44ca r12 0xffffffff8383abe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff81227ba5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039443540 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=37152 pid=91629 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=60, usrpri=60, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2e5ca8,0xffff80002a2e4560 process=0xffff80003b04e250 user=0xffff80003943e000, vmspace=0xfffffd806bad6210 estcpu=10, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 91629 191473 55956 32767 2 0x10 syz-executor *91629 37152 55956 32767 7 0x4000010 syz-executor 91629 318109 55956 32767 3 0x4000090 fsleep syz-executor 84624 239262 71814 32767 2 0xc90 syz-executor 84624 435434 71814 32767 3 0x4000090 kqpoll syz-executor 84624 110035 71814 32767 3 0x4000090 fsleep syz-executor 6207 367917 22477 32767 2 0x10 syz-executor 6207 436155 22477 32767 7 0x4000010 syz-executor 57064 518117 95987 32767 2 0xc90 syz-executor 57064 236388 95987 32767 3 0x4000090 piperd syz-executor 57064 468847 95987 32767 3 0x4000090 fsleep syz-executor 57064 205214 95987 32767 3 0x4000090 fsleep syz-executor 43213 246113 14850 32767 2 0x10 syz-executor 43213 494360 14850 32767 3 0x4000090 fsleep syz-executor 8969 73548 0 0 3 0x14200 bored sosplice 22477 29228 24877 32767 2 0xc90 syz-executor 16763 418953 998 32767 2 0x10 syz-executor 14850 206924 68177 32767 2 0xc90 syz-executor 55956 340433 91005 32767 2 0xc90 syz-executor 39466 173970 49342 32767 2 0xc90 syz-executor 71814 364805 81741 32767 2 0xc90 syz-executor 95987 371208 8859 32767 2 0xc90 syz-executor 84623 127839 50369 0 3 0x82 wait syz-executor 998 258752 50369 0 3 0x82 wait syz-executor 24877 473409 50369 0 3 0x82 wait syz-executor 91005 442974 50369 0 3 0x82 wait syz-executor 68177 284552 50369 0 3 0x82 wait syz-executor 8859 296293 50369 0 3 0x82 wait syz-executor 81741 450915 50369 0 3 0x82 wait syz-executor 49342 364571 50369 0 3 0x82 wait syz-executor 50369 351948 82108 0 3 0x82 kqread syz-executor 82108 328341 19650 0 3 0x10008a sigsusp ksh 19650 247822 37676 0 3 0x98 kqread sshd-session 37676 126701 94865 0 3 0x92 kqread sshd-session 14017 110861 1 0 3 0x100083 ttyin getty 94865 261537 1 0 3 0x88 kqread sshd 96418 54074 14457 73 3 0x1100090 kqread syslogd 14457 439453 1 0 3 0x100082 sbwait syslogd 48755 502809 1 0 3 0x100080 kqread resolvd 53899 341580 40954 77 3 0x100092 kqread dhcpleased 11347 282690 40954 77 3 0x100092 kqread dhcpleased 40954 421359 1 0 3 0x80 kqread dhcpleased 73222 386998 0 0 2 0x40014200 smr 89338 442404 0 0 3 0x14200 pgzero zerothread 61714 320436 0 0 3 0x14200 aiodoned aiodoned 81058 78377 0 0 3 0x14200 syncer update 57733 111123 0 0 3 0x14200 cleaner cleaner 77777 434688 0 0 3 0x14200 reaper reaper 83655 232727 0 0 3 0x14200 pgdaemon pagedaemon 88332 145995 0 0 3 0x14200 bored viomb 51487 215070 0 0 3 0x40014200 acpi0 acpi0 13554 138794 0 0 3 0x40014200 idle1 98654 49719 0 0 3 0x14200 bored softnet7 85927 183806 0 0 3 0x14200 bored softnet6 38690 437192 0 0 3 0x14200 bored softnet5 28940 477287 0 0 3 0x14200 bored softnet4 84988 376523 0 0 3 0x14200 bored softnet3 20876 249866 0 0 3 0x14200 bored softnet2 28775 299940 0 0 3 0x14200 bored softnet1 95879 319099 0 0 3 0x14200 bored softnet0 69081 195825 0 0 3 0x14200 smrbar systqmp 71669 266038 0 0 3 0x14200 bored systq 88048 396216 0 0 2 0x14200 softclockmp 70625 418746 0 0 3 0x40014200 tmoslp softclock 80049 312727 0 0 3 0x40014200 idle0 1 201842 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 (0xffffffff83940790) #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:748 #7 Xsyscall+0x128 Process 91629 (syz-executor) thread 0xffff80002a2e42b8 (37152) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8395c0c8) #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:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83940790) #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:748 #7 Xsyscall+0x128 Process 6207 (syz-executor) thread 0xffff80003c463a20 (436155) shared rwlock vmmaplk r = 0 (0xfffffd806bad66e0) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #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+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x57 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 16763 (syz-executor) thread 0xffff80002a2e4fb0 (418953) exclusive rrwlock inode r = 0 (0xfffffd80614b1330) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bf0c448) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 69081 (systqmp) thread 0xffff8000ffffe000 (195825) shared rwlock systqmp r = 0 (0xffffffff838154b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 10960K 10968K 166960K 11304 0 pcb 17 12K 12K 166960K 17 0 rtable 205 5K 6K 166960K 263 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 35 0 iov 1 0K 16K 166960K 18 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1427 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 39 0 dirhash 12 2K 3K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 125K 166960K 400 0 sigio 0 0K 0K 166960K 8 0 proc 63 115K 180K 166960K 510 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 57 0 in_multi 99 7K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 3 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 365 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 254 176K 194K 166960K 5248 0 UVM aobj 11 2K 3K 166960K 13 0 pinsyscall 45 90K 110K 166960K 1417 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 11 0K 2K 166960K 27 0 temp 50 8645K 8709K 166960K 4787 0 kqueue 14 22K 28K 166960K 72 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 58 0 54 1 0 1 1 0 8 0 rtentry 176 96 0 2 5 0 5 5 0 8 0 unpcb 144 212 0 196 2 0 2 2 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 129 0 121 2 0 2 2 0 8 1 arp 128 10 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 379 0 364 7 0 7 7 0 8 4 ip6q 72 5 0 3 1 0 1 1 0 8 0 ip6af 40 8 0 6 1 0 1 1 0 8 0 nd6 144 17 0 1 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 256 439 0 2 28 0 28 28 0 8 0 art_table 40 440 0 2 5 0 5 5 0 8 0 art_node 32 96 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 35 0 25 1 0 1 1 0 8 0 shmpl 112 10 0 2 1 0 1 1 0 8 0 pool(0xffffffff83940778:shmpl): page inconsistency: page 0xfffffd8061555000; 26 on list, 8 missing, 35 items per page dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1969 0 463 95 0 95 95 0 8 0 ffsino 296 1969 0 463 117 0 117 117 0 8 0 nchpl 144 2528 0 854 63 0 63 63 0 8 0 uvmvnodes 80 2050 0 0 42 0 42 42 0 8 0 vnodes 216 2050 0 0 114 0 114 114 0 8 0 namei 1024 7913 0 7913 2 0 2 2 0 8 2 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 8185 0 8185 3 2 1 2 1 8 1 plimitpl 152 117 0 92 2 0 2 2 0 8 1 sigapl 424 681 0 622 8 0 8 8 0 8 0 knotepl 120 341 0 0 11 0 11 11 0 8 0 kqueuepl 224 108 0 95 2 0 2 2 0 8 1 pipepl 344 123 0 95 3 0 3 3 0 8 0 fdescpl 528 658 0 622 4 0 4 4 0 8 0 filepl 160 3385 0 3165 13 0 13 13 0 8 2 lockfpl 104 198 0 196 2 0 2 2 0 8 1 lockfspl 48 30 0 28 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 38 0 14 1 0 1 1 0 8 0 ucredpl 104 736 0 717 1 0 1 1 0 8 0 zombiepl 144 624 0 622 1 0 1 1 0 8 0 processpl 1248 681 0 622 7 1 6 6 0 8 0 procpl 664 1129 0 1061 7 0 7 7 0 8 0 sosppl 168 5 0 4 1 0 1 1 0 8 0 sockpl 752 652 0 617 11 0 11 11 0 8 4 mcl64k 65536 3 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 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 268 0 0 17 0 17 17 0 8 0 bufpl 280 3134 0 116 216 0 216 216 0 8 0 anonpl 32 5421 0 0 44 0 44 44 0 246 0 amapchunkpl 152 16619 0 16077 36 2 34 34 0 158 10 amappl16 200 2359 0 2229 10 3 7 7 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 122 0 112 1 0 1 1 0 8 0 amappl13 176 25 0 25 1 1 0 1 0 8 0 amappl12 168 1260 0 1224 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 99 0 89 1 0 1 1 0 8 0 amappl6 120 199 0 196 1 0 1 1 0 8 0 amappl5 112 115 0 108 1 0 1 1 0 8 0 amappl4 104 263 0 248 1 0 1 1 0 8 0 amappl3 96 2935 0 2809 4 0 4 4 0 8 0 amappl2 88 689 0 633 2 0 2 2 0 8 0 amappl1 80 9402 0 8834 14 0 14 14 0 8 0 amappl 88 4569 0 4383 6 0 6 6 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 12 0 2 1 0 1 1 0 8 0 uaddrrnd 24 658 0 622 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 658 0 622 1 0 1 1 0 8 0 vmmpekpl 168 6834 0 6796 3 0 3 3 0 8 0 vmmpepl 168 48156 0 45979 101 0 101 101 0 357 2 vmsppl 488 657 0 622 7 1 6 6 0 8 0 rwobjpl 80 17676 0 14671 62 0 62 62 0 8 0 pdppl 4096 1324 0 1244 112 26 86 98 0 8 6 pvpl 32 12566 0 0 102 0 102 102 0 265 0 pmappl 256 657 0 622 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 288 0 29 8 0 8 8 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:438 panic(ffffffff83367833) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83940778,2,ffff800039443728) at pool_do_get+0x5df pool_get(ffffffff83940778,2) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e42b8,ffff800039443980,160,ffff8000394438d0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e42b8,ffff800039443980,ffff8000394438d0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039443980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039443980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54ec804a4e0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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_cmp8(7a758c6a000,680000) at __sanitizer_cov_trace_cmp8+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp8(7a758c6a000,680000) at __sanitizer_cov_trace_cmp8+0x54 sys/dev/kcov.c:212 uvm_map_lookup_entry(fffffd806bad65e0,680000,ffff80003b45f598) at uvm_map_lookup_entry+0x120 uvm_map_entrybyaddr sys/uvm/uvm_map.c:528 [inline] uvm_map_lookup_entry(fffffd806bad65e0,680000,ffff80003b45f598) at uvm_map_lookup_entry+0x120 sys/uvm/uvm_map.c:1565 uvmfault_lookup(ffff80003b45f570,0) at uvmfault_lookup+0x133 sys/uvm/uvm_fault.c:1924 uvm_fault_check(ffff80003b45f570,ffff80003b45f5a8,ffff80003b45f5e0,0) at uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 uvm_fault(fffffd806bad65e0,680000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:677 kpageflttrap(ffff80003b45f720,680be0) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003b45f720) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80003b45fb60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b45fb60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a9d7da6d70, count: 1 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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_cmp8(7a758c6a000,680000) at __sanitizer_cov_trace_cmp8+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_cmp8(7a758c6a000,680000) at __sanitizer_cov_trace_cmp8+0x54 sys/dev/kcov.c:212 uvm_map_lookup_entry(fffffd806bad65e0,680000,ffff80003b45f598) at uvm_map_lookup_entry+0x120 uvm_map_entrybyaddr sys/uvm/uvm_map.c:528 [inline] uvm_map_lookup_entry(fffffd806bad65e0,680000,ffff80003b45f598) at uvm_map_lookup_entry+0x120 sys/uvm/uvm_map.c:1565 uvmfault_lookup(ffff80003b45f570,0) at uvmfault_lookup+0x133 sys/uvm/uvm_fault.c:1924 uvm_fault_check(ffff80003b45f570,ffff80003b45f5a8,ffff80003b45f5e0,0) at uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 uvm_fault(fffffd806bad65e0,680000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:677 kpageflttrap(ffff80003b45f720,680be0) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003b45f720) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x57 syscall(ffff80003b45fb60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b45fb60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a9d7da6d70, count: -14