panic: pool_do_get: shmpl free list modified: page 0xfffffd8068f75000; item addr 0xfffffd8068f75b60; offset 0x40=0x5 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 305970 52432 0 0 0 0 syz-executor *215558 13665 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83366faa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83996ab8,1,ffff80003c4811a8) at pool_do_get+0x5df pool_get(ffffffff83996ab8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e4fb0,ffff80003c481400,1e3,ffff80003c481350) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e4fb0,ffff80003c481400,ffff80003c481350) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c481400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddcbb090c30, 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 0xfffffd8068f75000; item addr 0xfffffd8068f75b60; offset 0x40=0x5 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83366faa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83996ab8,1,ffff80003c4811a8) at pool_do_get+0x5df pool_get(ffffffff83996ab8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e4fb0,ffff80003c481400,1e3,ffff80003c481350) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e4fb0,ffff80003c481400,ffff80003c481350) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c481400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddcbb090c30, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c480fd0 rbx 0xffff8000299eeddf rdx 0xffff80000144fa80 rcx 0xffff80002a2e4fb0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3f6d7e0b8b6007e4 r11 0x7ed3414fca567dca r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82b41545 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c480fc0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=215558 pid=13665 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2e4a80,0xffff80002a2e42c8 process=0xffff800038826240 user=0xffff80003c47c000, vmspace=0xfffffd806b9b17b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52432 305970 61994 0 7 0 syz-executor 52432 88544 61994 0 2 0x4000000 syz-executor 13665 255419 7404 0 2 0 syz-executor *13665 215558 7404 0 7 0x4000000 syz-executor 52858 110930 95579 0 2 0 syz-executor 52858 326730 95579 0 2 0x4000000 syz-executor 617 97713 27413 0 2 0 syz-executor 617 480476 27413 0 2 0x4000000 syz-executor 617 429369 27413 0 3 0x4000080 fsleep syz-executor 10343 452213 4655 0 2 0 syz-executor 10343 319244 4655 0 3 0x4000080 fsleep syz-executor 65236 268496 52915 0 2 0 syz-executor 65236 84876 52915 0 3 0x4000080 fsleep syz-executor 65236 523105 52915 0 3 0x4000080 fsleep syz-executor 78694 294478 980 0 2 0 syz-executor 78694 132797 980 0 3 0x4000080 msgwait syz-executor 980 507869 38577 0 3 0x82 nanoslp syz-executor 27126 127562 0 0 3 0x14200 bored sosplice 61994 29358 38577 0 3 0x82 nanoslp syz-executor 4655 34545 38577 0 3 0x82 nanoslp syz-executor 27413 446219 38577 0 3 0x82 nanoslp syz-executor 7404 333389 38577 0 3 0x82 nanoslp syz-executor 52915 126418 38577 0 2 0x2 syz-executor 10339 388146 38577 0 3 0x82 nanoslp syz-executor 95579 92327 38577 0 2 0x2 syz-executor 38577 241686 69777 0 3 0x82 kqread syz-executor 69777 80297 83808 0 3 0x10008a sigsusp ksh 83808 49413 75745 0 3 0x98 kqread sshd-session 75745 218638 6903 0 3 0x92 kqread sshd-session 80913 360553 1 0 3 0x100083 ttyin getty 6903 400681 1 0 3 0x88 kqread sshd 53436 243519 62463 74 3 0x1100092 bpf pflogd 62463 136383 1 0 3 0x80 sbwait pflogd 58936 268662 50874 73 3 0x1100090 kqread syslogd 50874 244754 1 0 3 0x100082 sbwait syslogd 12632 227296 1 0 3 0x100080 kqread resolvd 1323 518566 88033 77 3 0x100092 kqread dhcpleased 20401 498617 88033 77 3 0x100092 kqread dhcpleased 88033 89413 1 0 3 0x80 kqread dhcpleased 78501 515055 0 0 3 0x14200 bored smr 48464 37900 0 0 2 0x14200 zerothread 14340 179070 0 0 3 0x14200 aiodoned aiodoned 40496 220273 0 0 3 0x14200 syncer update 49818 197118 0 0 3 0x14200 cleaner cleaner 62770 380474 0 0 3 0x14200 reaper reaper 24939 62697 0 0 3 0x14200 pgdaemon pagedaemon 21944 483195 0 0 3 0x14200 bored viomb 62956 189289 0 0 3 0x40014200 acpi0 acpi0 28453 489978 0 0 3 0x40014200 idle1 49458 69065 0 0 3 0x14200 bored softnet7 33452 266805 0 0 3 0x14200 bored softnet6 55052 438304 0 0 3 0x14200 bored softnet5 9556 134884 0 0 3 0x14200 bored softnet4 87734 43880 0 0 3 0x14200 bored softnet3 30123 192827 0 0 3 0x14200 bored softnet2 49040 205806 0 0 3 0x14200 bored softnet1 23180 61146 0 0 3 0x14200 bored softnet0 80651 20357 0 0 3 0x14200 bored systqmp 78905 1489 0 0 3 0x14200 bored systq 23784 374481 0 0 3 0x14200 tmoslp softclockmp 88381 269738 0 0 3 0x40014200 tmoslp softclock 8584 299431 0 0 3 0x40014200 idle0 1 114231 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 (0xffffffff83996ad0) #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 13665 (syz-executor) thread 0xffff80002a2e4fb0 (215558) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839bbeb0) #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 (0xffffffff83996ad0) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11036K 11421K 166960K 11536 0 pcb 18 13K 14K 166960K 100 0 rtable 219 7K 7K 166960K 326 0 pf 37 18K 21K 166960K 78 0 ifaddr 45 8K 8K 166960K 67 0 ifgroup 59 2K 2K 166960K 92 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 104 0 ioctlops 0 0K 5K 166960K 1523 0 iov 0 0K 20K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 1593 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 10 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 371 0 sigio 0 0K 0K 166960K 44 0 proc 72 115K 164K 166960K 591 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 39 0 in_multi 99 7K 7K 166960K 126 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 404 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 160K 169K 166960K 5017 0 UVM aobj 6 2K 2K 166960K 8 0 pinsyscall 43 86K 102K 166960K 1515 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 13 0K 1K 166960K 42 0 temp 45 8640K 8730K 166960K 18186 0 kqueue 14 22K 28K 166960K 57 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 54 0 51 1 0 1 1 0 8 0 rtentry 176 114 0 18 5 0 5 5 0 8 0 unpcb 144 317 0 296 6 0 6 6 0 8 5 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 89 0 85 4 0 4 4 0 8 3 arp 128 13 0 1 1 0 1 1 0 8 0 inpcb 328 375 0 366 10 1 9 10 0 8 8 nd6 144 18 0 2 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 13 0 13 1 0 1 1 0 8 1 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 1 1 0 8 0 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 32 0 0 1 0 1 1 0 8 0 pfstkey 128 32 0 0 2 0 2 2 0 8 0 pfstate 384 31 0 0 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 514 0 71 29 0 29 29 0 8 0 art_table 40 515 0 71 5 0 5 5 0 8 0 art_node 32 113 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 pool(0xffffffff83996ab8:shmpl): page inconsistency: page 0xfffffd8068f75000; 31 on list, 3 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1966 0 454 95 0 95 95 0 8 0 ffsino 296 1966 0 454 117 0 117 117 0 8 0 nchpl 144 2473 0 781 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 2212 0 0 46 0 46 46 0 8 0 vnodes 216 2212 0 0 123 0 123 123 0 8 0 namei 1024 7966 0 7966 1 0 1 1 0 8 1 percpumem 16 67 0 17 1 0 1 1 0 8 0 kstatmem 264 50 0 22 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11239 0 11239 6 2 4 4 1 8 4 plimitpl 152 59 0 41 1 0 1 1 0 8 0 sigapl 424 684 0 629 7 0 7 7 0 8 0 knotepl 120 353 0 0 11 0 11 11 0 8 0 kqueuepl 224 155 0 144 3 0 3 3 0 8 2 pipepl 344 128 0 101 3 0 3 3 0 8 0 fdescpl 528 661 0 629 3 0 3 3 0 8 0 filepl 160 3347 0 3126 19 1 18 19 0 8 8 lockfpl 104 117 0 115 1 0 1 1 0 8 0 lockfspl 48 51 0 49 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 295 0 282 1 0 1 1 0 8 0 zombiepl 144 630 0 629 1 0 1 1 0 8 0 processpl 1248 684 0 629 5 0 5 5 0 8 0 procpl 664 1083 0 1019 7 0 7 7 0 8 1 sockpl 752 753 0 720 21 10 11 18 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 302 0 0 19 0 19 19 0 8 0 bufpl 280 4837 0 158 335 0 335 335 0 8 0 anonpl 32 9451 0 0 77 0 77 77 0 246 0 amapchunkpl 152 15797 0 15292 30 3 27 27 0 158 7 amappl16 200 2079 0 2048 17 4 13 14 0 8 7 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 42 0 42 1 1 0 1 0 8 0 amappl12 168 1341 0 1309 3 1 2 2 0 8 0 amappl11 160 76 0 62 1 0 1 1 0 8 0 amappl10 152 31 0 31 1 1 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 172 0 160 1 0 1 1 0 8 0 amappl6 120 191 0 188 1 0 1 1 0 8 0 amappl5 112 157 0 148 1 0 1 1 0 8 0 amappl4 104 308 0 288 1 0 1 1 0 8 0 amappl3 96 2848 0 2730 5 1 4 4 0 8 1 amappl2 88 659 0 598 2 0 2 2 0 8 0 amappl1 80 9384 0 8777 15 2 13 15 0 8 0 amappl 88 4265 0 4096 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 7 0 7 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 661 0 629 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 661 0 629 1 0 1 1 0 8 0 vmmpekpl 168 6787 0 6756 2 0 2 2 0 8 0 vmmpepl 168 48041 0 46025 98 0 98 98 0 357 8 vmsppl 488 660 0 629 5 0 5 5 0 8 0 rwobjpl 80 17494 0 14341 66 0 66 66 0 8 0 pdppl 4096 1329 0 1258 99 28 71 81 0 8 0 pvpl 32 14453 0 0 117 0 117 117 0 265 0 pmappl 256 660 0 629 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 280 0 31 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83812ff0) 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(ffffffff839bbca8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839bbca8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x78da50185740, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83812ff0) 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(ffffffff839bbca8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839bbca8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x78da50185740, 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(ffffffff83366faa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83996ab8,1,ffff80003c4811a8) at pool_do_get+0x5df pool_get(ffffffff83996ab8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e4fb0,ffff80003c481400,1e3,ffff80003c481350) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e4fb0,ffff80003c481400,ffff80003c481350) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c481400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddcbb090c30, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83366faa) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83996ab8,1,ffff80003c4811a8) at pool_do_get+0x5df pool_get(ffffffff83996ab8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80002a2e4fb0,ffff80003c481400,1e3,ffff80003c481350) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80002a2e4fb0,ffff80003c481400,ffff80003c481350) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c481400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c481400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddcbb090c30, count: -8