login: panic: pool_do_get: shmpl free list modified: page 0xfffffd807417f000; item addr 0xfffffd807417faf8; offset 0x40=0x69ec4d22 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *384274 99537 32767 0x400010 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344a196) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83997940,1,ffff80002a2d0c48) at pool_do_get+0x5df pool_get(ffffffff83997940,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c421a18,ffff80002a2d0ea0,3a,ffff80002a2d0df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c421a18,ffff80002a2d0ea0,ffff80002a2d0df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2d0ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d0ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab2a2cf7f0, 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 0xfffffd807417f000; item addr 0xfffffd807417faf8; offset 0x40=0x69ec4d22 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344a196) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83997940,1,ffff80002a2d0c48) at pool_do_get+0x5df pool_get(ffffffff83997940,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c421a18,ffff80002a2d0ea0,3a,ffff80002a2d0df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c421a18,ffff80002a2d0ea0,ffff80002a2d0df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2d0ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d0ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab2a2cf7f0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a2d0a70 rbx 0xffff8000299bee07 rdx 0xffff8000015d1d00 rcx 0xffff80003c421a18 rax 0xffff8000299bdff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd462a9d5cb155120 r11 0xb6b251b8b37f423a r12 0xffff8000299bec08 r13 0 r14 0 r15 0x1 rip 0xffffffff82b4a795 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a2d0a60 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=384274 pid=99537 tcnt=2 stat=onproc flags process=400010 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c421cb0,0xffff8000fffe7788 process=0xffff80003a7ed830 user=0xffff80002a2cb000, vmspace=0xfffffd806c8689a8 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54980 138831 37357 32767 2 0x10 syz-executor 54980 90427 37357 32767 3 0x4000090 fsleep syz-executor 54980 61527 37357 32767 3 0x4000090 fsleep syz-executor 73163 512187 18189 32767 2 0x10 syz-executor 73163 247007 18189 32767 3 0x4000090 fifow syz-executor 73163 287172 18189 32767 3 0x4000090 fsleep syz-executor 99537 126268 92502 32767 2 0x400010 syz-executor *99537 384274 92502 32767 7 0x4400010 syz-executor 40480 446272 67212 32767 2 0x10 syz-executor 40480 16542 67212 32767 3 0x4000090 fsleep syz-executor 94651 211610 25641 32767 2 0x10 syz-executor 94651 357213 25641 32767 3 0x4000090 fsleep syz-executor 82944 458698 54372 0 3 0x82 wait syz-executor 18189 289988 89616 32767 3 0x90 nanoslp syz-executor 37357 51622 35443 32767 3 0x90 nanoslp syz-executor 25641 286016 29051 32767 3 0x90 nanoslp syz-executor 67212 95001 13890 32767 3 0x90 nanoslp syz-executor 92502 82220 43641 32767 3 0x90 nanoslp syz-executor 37952 3930 66053 32767 3 0x90 nanoslp syz-executor 72200 482892 74122 32767 3 0x10 biowait syz-executor 35443 194263 54372 0 3 0x82 wait syz-executor 89616 212032 54372 0 3 0x82 wait syz-executor 43641 506201 54372 0 3 0x82 wait syz-executor 66053 135579 54372 0 3 0x82 wait syz-executor 13890 469099 54372 0 3 0x82 wait syz-executor 29051 484925 54372 0 3 0x82 wait syz-executor 74122 309904 54372 0 3 0x82 wait syz-executor 54372 140457 60817 0 3 0x82 kqread syz-executor 60817 366355 53494 0 3 0x10008a sigsusp ksh 53494 210455 72888 0 3 0x98 kqread sshd-session 72888 139215 96671 0 3 0x92 kqread sshd-session 76728 268962 1 0 3 0x100083 ttyin getty 96671 468569 1 0 3 0x88 kqread sshd 54653 222317 87250 73 3 0x1100090 kqread syslogd 87250 43380 1 0 3 0x100082 sbwait syslogd 28357 211240 1 0 3 0x100080 kqread resolvd 29616 507589 56986 77 3 0x100092 kqread dhcpleased 66581 506971 56986 77 3 0x100092 kqread dhcpleased 56986 94954 1 0 3 0x80 kqread dhcpleased 25350 127761 0 0 3 0x14200 bored smr 39567 460855 0 0 2 0x14200 zerothread 98259 26737 0 0 3 0x14200 aiodoned aiodoned 88814 353147 0 0 3 0x14200 syncer update 63304 966 0 0 3 0x14200 cleaner cleaner 43874 459403 0 0 3 0x14200 reaper reaper 60562 510630 0 0 3 0x14200 pgdaemon pagedaemon 60946 461558 0 0 3 0x14200 bored viomb 40514 61075 0 0 3 0x40014200 acpi0 acpi0 12720 23078 0 0 3 0x40014200 idle1 12705 4844 0 0 3 0x14200 bored softnet1 99230 479780 0 0 3 0x14200 bored softnet0 27495 363674 0 0 3 0x14200 bored systqmp 32347 314001 0 0 3 0x14200 bored systq 4156 401966 0 0 3 0x14200 tmoslp softclockmp 44330 104067 0 0 3 0x40014200 tmoslp softclock 88066 34948 0 0 3 0x40014200 idle0 1 19733 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex uaddrrnd r = 0 (0xffffffff83aa4128) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_put+0xa6 sys/kern/subr_pool.c:803 #3 uvm_map_teardown+0x2c4 sys/uvm/uvm_map.c:2530 #4 exit1+0x6fc sys/kern/kern_exit.c:260 #5 sys_exit+0x1a sys/kern/kern_exit.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 CPU 1: exclusive mutex shmpl r = 0 (0xffffffff83997958) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 99537 (syz-executor) thread 0xffff80003c421a18 (384274) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a6e880) #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:783 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83997958) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 72200 (syz-executor) thread 0xffff8000fffeefa8 (482892) exclusive rrwlock inode r = 0 (0xfffffd8063ee5d88) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #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+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807aab9798) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #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:1887 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11077 12020K 12034K 166960K 12173 0 pcb 17 12K 12K 166960K 17 0 rtable 223 6K 7K 166960K 476 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 11 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 61 0 iov 0 0K 16K 166960K 51 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1289 81K 81K 166960K 1591 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 50 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 125K 166960K 1079 0 sigio 0 0K 0K 166960K 14 0 proc 58 99K 163K 166960K 614 0 subproc 72 4K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 245 0 in_multi 88 6K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 483 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 231 136K 170K 166960K 11931 0 UVM aobj 42 2K 2K 166960K 50 0 pinsyscall 44 88K 114K 166960K 2253 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 45 0 NDP 10 0K 2K 166960K 27 0 temp 75 9088K 9152K 166960K 8328 0 kqueue 13 20K 32K 166960K 219 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 120 174 0 170 3 2 1 3 0 8 0 rtentry 176 123 0 20 6 0 6 6 0 8 0 unpcb 144 964 0 947 6 5 1 6 0 8 0 syncache 336 24 0 24 1 0 1 1 0 8 1 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 502 0 497 6 5 1 4 0 8 0 arp 136 19 0 2 1 0 1 1 0 8 0 ipq 40 3 0 2 1 0 1 1 0 8 0 ipqe 40 6 0 3 1 0 1 1 0 8 0 inpcb 328 1083 0 1073 7 5 2 7 0 8 0 ip6q 72 2 0 1 2 1 1 1 0 8 0 ip6af 40 4 0 2 2 1 1 1 0 8 0 nd6 152 35 0 11 2 0 2 2 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 476 0 59 30 1 29 30 0 8 1 art_table 40 477 0 59 5 0 5 5 0 8 0 art_node 32 123 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semapl 112 46 0 36 1 0 1 1 0 8 0 shmpl 112 47 0 8 2 0 2 2 0 8 0 pool(0xffffffff83997940:shmpl): page inconsistency: page 0xfffffd807417f000; 30 on list, 4 missing, 35 items per page dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 3048 0 1563 94 0 94 94 0 8 0 ffsino 296 3048 0 1563 115 0 115 115 0 8 0 nchpl 144 4563 0 2860 64 0 64 64 0 8 0 vnodes 216 3219 0 0 179 0 179 179 0 8 0 namei 1024 15946 0 15946 3 1 2 2 0 8 2 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 25 0 2 2 0 2 2 0 8 0 scxspl 216 14551 0 14550 10 9 1 8 1 8 0 plimitpl 152 259 0 235 2 0 2 2 0 8 1 sigapl 424 1368 0 1316 7 0 7 7 0 8 0 knotepl 120 541 0 0 17 0 17 17 0 8 0 kqueuepl 224 359 0 350 5 4 1 5 0 8 0 pipepl 344 258 0 231 3 0 3 3 0 8 0 fdescpl 528 1352 0 1317 4 0 4 4 0 8 1 filepl 160 8382 0 8171 17 6 11 16 0 8 1 lockfpl 104 271 0 269 1 0 1 1 0 8 0 lockfspl 48 104 0 102 1 0 1 1 0 8 0 sessionpl 144 94 0 78 1 0 1 1 0 8 0 pgrppl 48 121 0 97 1 0 1 1 0 8 0 ucredpl 104 1698 0 1680 1 0 1 1 0 8 0 zombiepl 144 1318 0 1316 1 0 1 1 0 8 0 processpl 1232 1368 0 1316 5 0 5 5 0 8 0 procpl 664 2961 0 2902 7 0 7 7 0 8 1 sosppl 176 6 0 6 2 1 1 1 0 8 1 sockpl 752 2234 0 2203 21 16 5 17 0 8 1 mcl64k 65536 20 0 0 3 0 3 3 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 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 33 0 0 3 0 3 3 0 8 0 mcl2k 2048 59 0 0 8 0 8 8 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 746 0 0 47 0 47 47 0 8 0 bufpl 280 3899 0 105 271 0 271 271 0 8 0 anonpl 32 11642 0 0 94 0 94 94 0 246 0 amapchunkpl 152 40958 0 40452 46 8 38 44 0 158 16 amappl16 200 6119 0 6095 37 22 15 26 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 407 0 406 1 0 1 1 0 8 0 amappl13 176 146 0 136 1 0 1 1 0 8 0 amappl12 168 1637 0 1603 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 60 0 50 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 101 0 100 1 0 1 1 0 8 0 amappl7 128 158 0 146 1 0 1 1 0 8 0 amappl6 120 150 0 149 1 0 1 1 0 8 0 amappl5 112 129 0 119 1 0 1 1 0 8 0 amappl4 104 319 0 301 1 0 1 1 0 8 0 amappl3 96 7676 0 7555 4 0 4 4 0 8 0 amappl2 88 712 0 656 2 0 2 2 0 8 0 amappl1 80 18522 0 17949 20 5 15 18 0 8 0 amappl 88 10944 0 10774 5 0 5 5 0 92 0 uvmvnodes 80 134 0 0 3 0 3 3 0 8 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 49 0 8 1 0 1 1 0 8 0 uaddrrnd 24 1352 0 1317 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1352 0 1317 1 0 1 1 0 8 0 vmmpekpl 168 14354 0 14310 3 0 3 3 0 8 0 vmmpepl 168 101941 0 99966 117 7 110 113 0 357 9 vmsppl 488 1351 0 1316 7 1 6 6 0 8 1 rwobjpl 80 32686 0 31670 32 3 29 31 0 8 2 pdppl 4096 2711 0 2632 139 58 81 97 0 8 2 pvpl 32 19823 0 0 160 0 160 160 0 265 0 pmappl 256 1351 0 1316 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 358 0 67 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83959ff0) 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 exit1(ffff8000fffe62b8,43,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe62b8,ffff80003c433190,ffff80003c4330e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c433190) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c433190) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7062ebc64e70, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83959ff0) 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+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 exit1(ffff8000fffe62b8,43,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe62b8,ffff80003c433190,ffff80003c4330e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c433190) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c433190) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7062ebc64e70, count: -8 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(ffffffff8344a196) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83997940,1,ffff80002a2d0c48) at pool_do_get+0x5df pool_get(ffffffff83997940,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c421a18,ffff80002a2d0ea0,3a,ffff80002a2d0df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c421a18,ffff80002a2d0ea0,ffff80002a2d0df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2d0ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d0ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab2a2cf7f0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344a196) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83997940,1,ffff80002a2d0c48) at pool_do_get+0x5df pool_get(ffffffff83997940,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c421a18,ffff80002a2d0ea0,3a,ffff80002a2d0df0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c421a18,ffff80002a2d0ea0,ffff80002a2d0df0) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80002a2d0ea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d0ea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdab2a2cf7f0, count: -8