panic: pool_do_get: shmpl free list modified: page 0xfffffd8065711000; item addr 0xfffffd8065711b60; offset 0x40=0x69de120f Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *386396 79061 32767 0x10 0x4000000 1K syz-executor 384466 9395 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447c7a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83975d30,1,ffff800039fe79a8) at pool_do_get+0x5df pool_get(ffffffff83975d30,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c41cd20,ffff800039fe7c00,38,ffff800039fe7b50) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c41cd20,ffff800039fe7c00,ffff800039fe7b50) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039fe7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4e3bbb0f0, 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 0xfffffd8065711000; item addr 0xfffffd8065711b60; offset 0x40=0x69de120f ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447c7a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83975d30,1,ffff800039fe79a8) at pool_do_get+0x5df pool_get(ffffffff83975d30,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c41cd20,ffff800039fe7c00,38,ffff800039fe7b50) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c41cd20,ffff800039fe7c00,ffff800039fe7b50) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039fe7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4e3bbb0f0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800039fe77d0 rbx 0xffff8000299aee07 rdx 0xffff8000015a9b80 rcx 0xffff80003c41cd20 rax 0xffff8000299adff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1566cf943d930da0 r11 0x83a73d9276b0ef1d r12 0xffff8000299aec08 r13 0 r14 0 r15 0x1 rip 0xffffffff82b7ba55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039fe77c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=386396 pid=79061 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=58, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c41d780,0xffffffff83994900 process=0xffff800039feb040 user=0xffff800039fe2000, vmspace=0xfffffd800f801030 estcpu=22, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79061 123730 42993 32767 2 0x10 syz-executor *79061 386396 42993 32767 7 0x4000010 syz-executor 74068 266913 88654 32767 2 0x10 syz-executor 99396 204255 55643 32767 2 0x10 syz-executor 55993 465079 32618 32767 2 0x10 syz-executor 9395 61742 56723 32767 2 0x10 syz-executor 9395 384466 56723 32767 7 0x4000010 syz-executor 5174 314220 90533 32767 2 0x10 syz-executor 5174 62638 90533 32767 2 0x4000010 syz-executor 5174 293303 90533 32767 2 0x4000010 syz-executor 88654 407464 99212 32767 3 0x90 nanoslp syz-executor 90533 25810 92729 32767 3 0x90 nanoslp syz-executor 56723 502501 37261 32767 3 0x90 nanoslp syz-executor 55643 375535 61082 32767 3 0x90 nanoslp syz-executor 76326 491027 67116 32767 3 0x90 wait syz-executor 32618 16641 45686 32767 3 0x90 nanoslp syz-executor 85097 449425 10562 32767 3 0x90 nanoslp syz-executor 42993 313498 73402 32767 3 0x90 nanoslp syz-executor 99212 452454 82522 0 3 0x82 wait syz-executor 37261 55321 82522 0 3 0x82 wait syz-executor 92729 357197 82522 0 3 0x82 wait syz-executor 67116 434555 82522 0 3 0x82 wait syz-executor 61082 180291 82522 0 3 0x82 wait syz-executor 10562 155578 82522 0 3 0x82 wait syz-executor 45686 405956 82522 0 3 0x82 wait syz-executor 73402 22178 82522 0 3 0x82 wait syz-executor 82522 295036 29908 0 3 0x82 kqread syz-executor 29908 171163 57676 0 3 0x10008a sigsusp ksh 57676 278589 56796 0 3 0x98 kqread sshd-session 56796 516501 2344 0 3 0x92 kqread sshd-session 4448 308433 1 0 3 0x100083 ttyin getty 2344 331107 1 0 3 0x88 kqread sshd 48861 485406 62787 73 3 0x1100090 kqread syslogd 62787 90112 1 0 3 0x100082 sbwait syslogd 1314 232779 1 0 3 0x100080 kqread resolvd 41490 382682 45751 77 3 0x100092 kqread dhcpleased 27500 232240 45751 77 3 0x100092 kqread dhcpleased 45751 501521 1 0 3 0x80 kqread dhcpleased 25727 276814 0 0 3 0x14200 bored smr 34204 119994 0 0 2 0x14200 zerothread 85903 508887 0 0 3 0x14200 aiodoned aiodoned 94214 219067 0 0 3 0x14200 syncer update 54453 152000 0 0 3 0x14200 cleaner cleaner 23297 54190 0 0 2 0x14200 reaper 70993 325101 0 0 3 0x14200 pgdaemon pagedaemon 76554 170113 0 0 3 0x14200 bored viomb 75512 269041 0 0 3 0x40014200 acpi0 acpi0 23505 297212 0 0 3 0x40014200 idle1 44824 216223 0 0 3 0x14200 bored softnet1 51343 422695 0 0 2 0x14200 softnet0 15764 287473 0 0 3 0x14200 bored systqmp 67261 463869 0 0 3 0x14200 bored systq 83626 5311 0 0 3 0x14200 tmoslp softclockmp 46639 490227 0 0 2 0x40014200 softclock 39428 188087 0 0 3 0x40014200 idle0 1 387889 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 (0xffffffff83975d48) #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:482 #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 79061 (syz-executor) thread 0xffff80003c41cd20 (386396) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3cdc0) #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 (0xffffffff83975d48) #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:482 #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 9395 (syz-executor) thread 0xffff80002a3674d8 (384466) shared rwlock vmmaplk r = 0 (0xfffffd807cfc5ab0) #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:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x64 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11089 12023K 12034K 166960K 12182 0 pcb 17 12K 12K 166960K 17 0 rtable 239 6K 7K 166960K 370 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 70 37K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 34 0 iov 0 0K 16K 166960K 14 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1362 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 0K 166960K 16 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 125K 166960K 344 0 sigio 0 0K 0K 166960K 71 0 proc 58 99K 147K 166960K 516 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 30 0 in_multi 99 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 415 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 218 175K 211K 166960K 4930 0 UVM aobj 7 2K 2K 166960K 10 0 pinsyscall 45 90K 112K 166960K 1465 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 11 0K 2K 166960K 27 0 temp 46 9077K 9143K 166960K 4760 0 kqueue 13 20K 28K 166960K 64 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 50 0 47 1 0 1 1 0 8 0 rtentry 176 114 0 3 6 0 6 6 0 8 0 unpcb 144 134 0 118 1 0 1 1 0 8 0 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 160 0 154 7 0 7 7 0 8 6 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 4 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 0 1 0 1 1 0 8 0 inpcb 328 361 0 352 7 0 7 7 0 8 6 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 152 27 0 2 2 0 2 2 0 8 1 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 256 469 0 15 30 0 30 30 0 8 1 art_table 40 470 0 15 5 0 5 5 0 8 0 art_node 32 114 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 75 0 39 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 7 0 3 1 0 1 1 0 8 0 pool(0xffffffff83975d30:shmpl): page inconsistency: page 0xfffffd8065711000; 30 on list, 4 missing, 35 items per page dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 1849 0 386 92 0 92 92 0 8 0 ffsino 296 1849 0 386 114 0 114 114 0 8 0 nchpl 144 2318 0 630 63 0 63 63 0 8 0 vnodes 216 1930 0 0 108 0 108 108 0 8 0 namei 1024 7283 0 7283 2 0 2 2 0 8 2 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 7531 0 7531 4 3 1 3 1 8 1 plimitpl 152 203 0 179 2 0 2 2 0 8 1 sigapl 424 645 0 591 7 0 7 7 0 8 0 knotepl 120 276 0 0 9 0 9 9 0 8 0 kqueuepl 224 93 0 81 1 0 1 1 0 8 0 pipepl 344 134 0 107 3 0 3 3 0 8 0 fdescpl 528 629 0 593 4 0 4 4 0 8 0 filepl 160 2861 0 2651 16 0 16 16 0 8 6 lockfpl 104 46 0 44 1 0 1 1 0 8 0 lockfspl 48 19 0 17 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 48 0 24 1 0 1 1 0 8 0 ucredpl 104 513 0 494 1 0 1 1 0 8 0 zombiepl 144 593 0 591 1 0 1 1 0 8 0 processpl 1232 645 0 591 5 0 5 5 0 8 0 procpl 664 989 0 931 7 0 7 7 0 8 1 sockpl 752 550 0 522 11 0 11 11 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 348 0 0 22 0 22 22 0 8 0 bufpl 280 2465 0 102 169 0 169 169 0 8 0 anonpl 32 10583 0 0 86 0 86 86 0 246 0 amapchunkpl 152 14724 0 14279 31 0 31 31 0 158 8 amappl16 200 2587 0 2109 31 5 26 26 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 407 0 406 1 0 1 1 0 8 0 amappl13 176 172 0 162 1 0 1 1 0 8 0 amappl12 168 899 0 867 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 66 0 56 1 0 1 1 0 8 0 amappl9 144 260 0 259 1 0 1 1 0 8 0 amappl8 136 98 0 97 1 0 1 1 0 8 0 amappl7 128 147 0 135 1 0 1 1 0 8 0 amappl6 120 155 0 153 1 0 1 1 0 8 0 amappl5 112 97 0 90 1 0 1 1 0 8 0 amappl4 104 273 0 257 1 0 1 1 0 8 0 amappl3 96 2777 0 2675 5 1 4 4 0 8 0 amappl2 88 556 0 504 2 0 2 2 0 8 0 amappl1 80 11655 0 11083 19 0 19 19 0 8 3 amappl 88 4172 0 4019 6 0 6 6 0 92 1 uvmvnodes 80 107 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 9 0 3 1 0 1 1 0 8 0 uaddrrnd 24 629 0 593 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 629 0 593 1 0 1 1 0 8 0 vmmpekpl 168 7436 0 7399 3 0 3 3 0 8 0 vmmpepl 168 50551 0 48148 119 0 119 119 0 357 14 vmsppl 488 628 0 591 7 1 6 6 0 8 0 rwobjpl 80 17853 0 16482 31 1 30 30 0 8 2 pdppl 4096 1265 0 1182 119 32 87 97 0 8 4 pvpl 32 16741 0 0 137 1 136 136 0 265 0 pmappl 256 628 0 591 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 304 0 35 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838e5ff0) 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+0xb kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 copy_fault() at copy_fault syscall(ffff8000363c6ff0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363c6ff0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaca249579d0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff838e5ff0) 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+0xb kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 copy_fault() at copy_fault syscall(ffff8000363c6ff0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000363c6ff0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaca249579d0, count: -10 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(ffffffff83447c7a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83975d30,1,ffff800039fe79a8) at pool_do_get+0x5df pool_get(ffffffff83975d30,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c41cd20,ffff800039fe7c00,38,ffff800039fe7b50) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c41cd20,ffff800039fe7c00,ffff800039fe7b50) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039fe7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4e3bbb0f0, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83447c7a) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83975d30,1,ffff800039fe79a8) at pool_do_get+0x5df pool_get(ffffffff83975d30,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c41cd20,ffff800039fe7c00,38,ffff800039fe7b50) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c41cd20,ffff800039fe7c00,ffff800039fe7b50) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff800039fe7c00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe7c00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4e3bbb0f0, count: -8