panic: pool_do_get: shmpl free list modified: page 0xfffffd806e3d1000; item addr 0xfffffd806e3d1ee0; offset 0x40=0x68a587c2 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *314552 25840 32767 0x10 0x4000000 1K syz-executor 473402 90173 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bcb4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387b540,1,ffff80003c48ee98) at pool_do_get+0x5df pool_get(ffffffff8387b540,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4587f0,ffff80003c48f0f0,2,ffff80003c48f040) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4587f0,ffff80003c48f0f0,ffff80003c48f040) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c48f0f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48f0f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x561f80c5270, 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 0xfffffd806e3d1000; item addr 0xfffffd806e3d1ee0; offset 0x40=0x68a587c2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bcb4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387b540,1,ffff80003c48ee98) at pool_do_get+0x5df pool_get(ffffffff8387b540,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4587f0,ffff80003c48f0f0,2,ffff80003c48f040) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4587f0,ffff80003c48f0f0,ffff80003c48f040) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c48f0f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48f0f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x561f80c5270, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c48ecc0 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff80003c4587f0 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa3af9f471a101d28 r11 0x940e6ee55835c6fa r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff812c5975 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c48ecb0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=314552 pid=25840 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c458fb8,0xffffffff83930330 process=0xffff80003c478500 user=0xffff80003c48a000, vmspace=0xfffffd806bbd77c0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25840 243590 6840 32767 2 0x10 syz-executor *25840 314552 6840 32767 7 0x4000010 syz-executor 90173 473402 99725 32767 7 0x10 syz-executor 90173 316226 99725 32767 2 0x4000010 syz-executor 54209 515923 9065 32767 2 0x10 syz-executor 54209 455093 9065 32767 3 0x4000090 fsleep syz-executor 56477 374508 51272 32767 2 0x10 syz-executor 56477 13215 51272 32767 3 0x4000090 fsleep syz-executor 56477 420555 51272 32767 3 0x4000090 fsleep syz-executor 50429 240508 56022 32767 3 0x90 nanoslp syz-executor 50429 389123 56022 32767 3 0x4000090 netacc syz-executor 50429 141184 56022 32767 3 0x4000090 fsleep syz-executor 50429 8222 56022 32767 3 0x4000090 fsleep syz-executor 68044 415222 55458 32767 3 0x90 nanoslp syz-executor 68044 248964 55458 32767 3 0x4000090 semwait syz-executor 68044 451164 55458 32767 3 0x4000090 fsleep syz-executor 68044 339821 55458 32767 3 0x4000090 fsleep syz-executor 79591 243262 16463 32767 3 0x90 nanoslp syz-executor 79591 259552 16463 32767 3 0x4000090 msgwait syz-executor 79591 123481 16463 32767 3 0x4000090 fsleep syz-executor 55705 418249 0 0 3 0x14200 bored sosplice 51272 335902 20204 32767 3 0x90 nanoslp syz-executor 55458 246319 63496 32767 3 0x90 nanoslp syz-executor 56022 27137 51984 32767 3 0x90 nanoslp syz-executor 34505 323102 87690 32767 3 0x90 nanoslp syz-executor 9065 299124 46871 32767 3 0x90 nanoslp syz-executor 99725 96018 35015 32767 3 0x90 nanoslp syz-executor 16463 247746 62476 32767 3 0x90 nanoslp syz-executor 6840 350856 54692 32767 3 0x90 nanoslp syz-executor 63496 394104 12614 0 3 0x82 wait syz-executor 87690 328936 12614 0 3 0x82 wait syz-executor 46871 333604 12614 0 3 0x82 wait syz-executor 51984 409643 12614 0 3 0x82 wait syz-executor 20204 400549 12614 0 3 0x82 wait syz-executor 62476 391028 12614 0 3 0x82 wait syz-executor 35015 123252 12614 0 3 0x82 wait syz-executor 54692 191504 12614 0 3 0x82 wait syz-executor 12614 362189 35403 0 3 0x82 kqread syz-executor 35403 322507 78945 0 3 0x10008a sigsusp ksh 78945 193823 9230 0 3 0x98 kqread sshd-session 9230 336531 87456 0 3 0x92 kqread sshd-session 59957 483834 1 0 3 0x100083 ttyin getty 87456 455472 1 0 3 0x88 kqread sshd 86909 470498 81151 73 3 0x1100090 kqread syslogd 81151 389156 1 0 3 0x100082 sbwait syslogd 25008 297132 1 0 3 0x100080 kqread resolvd 65687 523025 29097 77 3 0x100092 kqread dhcpleased 7562 278567 29097 77 3 0x100092 kqread dhcpleased 29097 207386 1 0 3 0x80 kqread dhcpleased 13437 98257 0 0 3 0x14200 bored smr 24857 113164 0 0 2 0x14200 zerothread 24656 288605 0 0 3 0x14200 aiodoned aiodoned 11605 374964 0 0 3 0x14200 syncer update 96822 344864 0 0 3 0x14200 cleaner cleaner 58325 369736 0 0 3 0x14200 reaper reaper 43496 75585 0 0 3 0x14200 pgdaemon pagedaemon 65383 489892 0 0 3 0x14200 bored viomb 21327 169775 0 0 3 0x40014200 acpi0 acpi0 44566 92120 0 0 3 0x40014200 idle1 49718 77310 0 0 3 0x14200 bored softnet7 96168 262496 0 0 3 0x14200 bored softnet6 23457 160754 0 0 3 0x14200 bored softnet5 197 149865 0 0 3 0x14200 bored softnet4 5060 242395 0 0 3 0x14200 bored softnet3 70536 358269 0 0 3 0x14200 bored softnet2 32784 398282 0 0 3 0x14200 bored softnet1 27256 303882 0 0 3 0x14200 bored softnet0 37884 44830 0 0 3 0x14200 bored systqmp 33951 53851 0 0 3 0x14200 bored systq 77332 203205 0 0 3 0x14200 tmoslp softclockmp 96425 323786 0 0 3 0x40014200 tmoslp softclock 25490 149276 0 0 3 0x40014200 idle0 1 3992 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 (0xffffffff8387b558) #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 25840 (syz-executor) thread 0xffff80003c4587f0 (314552) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8399cf80) #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 (0xffffffff8387b558) #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 10197 10957K 10968K 166960K 11275 0 pcb 17 12K 12K 166960K 17 0 rtable 213 6K 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 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 16K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1385 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 125K 166960K 213 0 proc 58 99K 180K 166960K 482 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 1 0K 0K 166960K 17 0 in_multi 99 7K 7K 166960K 102 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 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 412 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 269 168K 177K 166960K 3318 0 UVM aobj 3 2K 2K 166960K 4 0 pinsyscall 47 94K 108K 166960K 1215 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 2K 166960K 27 0 temp 36 8638K 8702K 166960K 4116 0 kqueue 16 24K 26K 166960K 33 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 37 0 34 1 0 1 1 0 8 0 rtentry 176 99 0 1 5 0 5 5 0 8 0 unpcb 144 72 0 50 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 74 0 68 4 0 4 4 0 8 3 arp 128 11 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 328 141 0 130 4 0 4 4 0 8 2 nd6 144 19 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 256 444 0 0 28 0 28 28 0 8 0 art_table 40 445 0 0 5 0 5 5 0 8 0 art_node 32 99 0 11 1 0 1 1 0 8 0 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 pool(0xffffffff8387b540:shmpl): page inconsistency: page 0xfffffd806e3d1000; 34 on list, 0 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1673 0 167 95 0 95 95 0 8 0 ffsino 296 1673 0 167 117 0 117 117 0 8 0 nchpl 144 1965 0 284 63 0 63 63 0 8 0 uvmvnodes 80 1754 0 0 36 0 36 36 0 8 0 vnodes 216 1754 0 0 98 0 98 98 0 8 0 namei 1024 6111 0 6111 1 0 1 1 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 7047 0 7046 9 1 8 8 1 8 7 plimitpl 152 41 0 17 2 0 2 2 0 8 1 sigapl 424 490 0 429 8 0 8 8 0 8 0 knotepl 120 302 0 0 10 0 10 10 0 8 0 kqueuepl 224 70 0 58 3 0 3 3 0 8 2 pipepl 344 138 0 111 6 0 6 6 0 8 3 fdescpl 528 467 0 429 4 0 4 4 0 8 0 filepl 160 2080 0 1861 14 0 14 14 0 8 2 lockfpl 104 29 0 26 1 0 1 1 0 8 0 lockfspl 48 13 0 10 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 32 0 8 1 0 1 1 0 8 0 ucredpl 104 259 0 240 1 0 1 1 0 8 0 zombiepl 144 430 0 429 1 0 1 1 0 8 0 processpl 1232 490 0 429 7 1 6 6 0 8 0 procpl 664 615 0 541 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 252 0 216 7 0 7 7 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 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 256 180 0 0 12 0 12 12 0 8 0 bufpl 280 2894 0 116 199 0 199 199 0 8 0 anonpl 32 3775 0 0 31 0 31 31 0 246 0 amapchunkpl 152 9913 0 9306 30 4 26 26 0 158 2 amappl16 200 1995 0 1972 5 0 5 5 0 8 3 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 130 0 120 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 1060 0 1022 3 0 3 3 0 8 1 amappl11 160 66 0 56 1 0 1 1 0 8 0 amappl10 152 34 0 34 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 0 1 1 0 8 1 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 95 0 85 1 0 1 1 0 8 0 amappl6 120 218 0 215 1 0 1 1 0 8 0 amappl5 112 134 0 128 1 0 1 1 0 8 0 amappl4 104 264 0 249 1 0 1 1 0 8 0 amappl3 96 1692 0 1552 4 0 4 4 0 8 0 amappl2 88 605 0 550 2 0 2 2 0 8 0 amappl1 80 8479 0 7905 14 0 14 14 0 8 0 amappl 88 2694 0 2490 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 467 0 429 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 467 0 429 1 0 1 1 0 8 0 vmmpekpl 168 5516 0 5481 3 0 3 3 0 8 1 vmmpepl 168 36839 0 34673 100 0 100 100 0 357 0 vmsppl 488 466 0 429 7 1 6 6 0 8 0 rwobjpl 80 14738 0 12121 56 0 56 56 0 8 0 pdppl 4096 942 0 858 108 20 88 98 0 8 4 pvpl 32 11532 0 0 93 0 93 93 0 265 0 pmappl 256 466 0 429 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 283 0 23 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83819ff0) 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(ffffffff8399cd78) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8399cd78) 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: 0x73cd0b6bfbe0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83819ff0) 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(ffffffff8399cd78) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8399cd78) 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: 0x73cd0b6bfbe0, 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(ffffffff8336bcb4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387b540,1,ffff80003c48ee98) at pool_do_get+0x5df pool_get(ffffffff8387b540,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4587f0,ffff80003c48f0f0,2,ffff80003c48f040) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4587f0,ffff80003c48f0f0,ffff80003c48f040) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c48f0f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48f0f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x561f80c5270, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336bcb4) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff8387b540,1,ffff80003c48ee98) at pool_do_get+0x5df pool_get(ffffffff8387b540,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4587f0,ffff80003c48f0f0,2,ffff80003c48f040) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4587f0,ffff80003c48f0f0,ffff80003c48f040) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80003c48f0f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48f0f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x561f80c5270, count: -8