panic: pool_do_get: shmpl free list modified: page 0xfffffd8064a6e000; item addr 0xfffffd8064a6eee0; offset 0x40=0x68a848c5 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 80687 88437 32767 0x10 0 0 syz-executor *432993 88437 32767 0x10 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83362765) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838886c0,1,ffff80002a3bd848) at pool_do_get+0x5df pool_get(ffffffff838886c0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4a8030,ffff80002a3bdaa0,0,ffff80002a3bd9f0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4a8030,ffff80002a3bdaa0,ffff80002a3bd9f0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002a3bdaa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bdaa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92de809df90, 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 0xfffffd8064a6e000; item addr 0xfffffd8064a6eee0; offset 0x40=0x68a848c5 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83362765) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838886c0,1,ffff80002a3bd848) at pool_do_get+0x5df pool_get(ffffffff838886c0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4a8030,ffff80002a3bdaa0,0,ffff80002a3bd9f0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4a8030,ffff80002a3bdaa0,ffff80002a3bd9f0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002a3bdaa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bdaa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92de809df90, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3bd670 rbx 0xffff8000299eeddf rdx 0xffff800001436cc0 rcx 0xffff80003c4a8030 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfeccff2c06ed817a r11 0x79c0130a65be297 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82320925 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3bd660 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=432993 pid=88437 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=53, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4a9788,0xffff80003c4a8aa0 process=0xffff80003c45c030 user=0xffff80002a3b8000, vmspace=0xfffffd806baa5028 estcpu=3, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32952 170127 8802 32767 2 0x10 syz-executor 72744 8745 5225 32767 2 0x10 syz-executor 72744 330655 5225 32767 2 0x4000010 syz-executor 72744 278608 5225 32767 2 0x4000010 syz-executor 88437 80687 73291 32767 7 0x10 syz-executor 88437 345987 73291 32767 3 0x4000010 biowait syz-executor *88437 432993 73291 32767 7 0x4000010 syz-executor 39454 488985 34233 32767 3 0x90 nanoslp syz-executor 39454 421885 34233 32767 3 0x4000090 lockf syz-executor 39454 47235 34233 32767 3 0x4000090 fsleep syz-executor 13535 133580 0 0 3 0x14200 bored sosplice 69299 128148 91238 0 3 0x82 sbwait sshd-session 8802 465717 37988 32767 3 0x90 nanoslp syz-executor 34233 280538 63566 32767 3 0x90 nanoslp syz-executor 10904 521279 28313 32767 3 0x90 piperd syz-executor 5225 179372 96017 32767 3 0x90 nanoslp syz-executor 73585 24553 26856 32767 3 0x90 wait syz-executor 73291 242171 63026 32767 3 0x90 nanoslp syz-executor 16404 174343 54168 32767 2 0x10000010 syz-executor 37988 144305 38801 0 3 0x82 wait syz-executor 28313 497122 38801 0 3 0x82 wait syz-executor 96017 191307 38801 0 3 0x82 wait syz-executor 63566 411532 38801 0 3 0x82 wait syz-executor 26856 500229 38801 0 3 0x82 wait syz-executor 54168 453932 38801 0 3 0x82 wait syz-executor 63026 380331 38801 0 3 0x82 wait syz-executor 38801 69491 27904 0 3 0x82 nanoslp syz-executor 27904 29274 89155 0 3 0x10008a sigsusp ksh 89155 331225 14669 0 3 0x98 kqread sshd-session 14669 272805 91238 0 3 0x92 kqread sshd-session 42799 234475 1 0 3 0x100083 ttyin getty 91238 33818 1 0 3 0x88 kqread sshd 3417 316223 38768 73 3 0x1100090 kqread syslogd 38768 39249 1 0 3 0x100082 sbwait syslogd 40664 352730 1 0 3 0x100080 kqread resolvd 35228 212286 91839 77 3 0x100092 kqread dhcpleased 59627 455333 91839 77 3 0x100092 kqread dhcpleased 91839 284576 1 0 3 0x80 kqread dhcpleased 30227 304285 0 0 3 0x14200 bored smr 26756 188779 0 0 3 0x14200 pgzero zerothread 93928 60874 0 0 3 0x14200 aiodoned aiodoned 86651 422972 0 0 3 0x14200 syncer update 12944 521911 0 0 3 0x14200 cleaner cleaner 65352 517751 0 0 3 0x14200 reaper reaper 34888 135634 0 0 3 0x14200 pgdaemon pagedaemon 21699 442599 0 0 3 0x14200 bored viomb 33767 486973 0 0 3 0x40014200 acpi0 acpi0 93246 355678 0 0 3 0x40014200 idle1 13819 290599 0 0 3 0x14200 bored softnet7 67533 363193 0 0 3 0x14200 bored softnet6 91109 294635 0 0 3 0x14200 bored softnet5 61165 341006 0 0 3 0x14200 bored softnet4 67205 454238 0 0 3 0x14200 bored softnet3 17099 416493 0 0 3 0x14200 bored softnet2 9873 168102 0 0 3 0x14200 bored softnet1 58059 408803 0 0 3 0x14200 bored softnet0 75952 120059 0 0 3 0x14200 bored systqmp 80592 510149 0 0 3 0x14200 bored systq 15009 75861 0 0 3 0x14200 tmoslp softclockmp 91430 469060 0 0 3 0x40014200 tmoslp softclock 66568 445191 0 0 3 0x40014200 idle0 1 432024 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 (0xffffffff838886d8) #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 88437 (syz-executor) thread 0xffff80002a2e54e0 (345987) exclusive rrwlock inode r = 0 (0xfffffd806bb958f0) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 88437 (syz-executor) thread 0xffff80003c4a8030 (432993) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838ab350) #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 (0xffffffff838886d8) #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 10192 10954K 10968K 166960K 11273 0 pcb 17 12K 12K 166960K 17 0 rtable 191 5K 6K 166960K 266 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 2 1K 9K 166960K 7 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 12K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1504 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 21 77K 121K 166960K 301 0 sigio 0 0K 0K 166960K 7 0 proc 58 99K 147K 166960K 500 0 subproc 63 3K 4K 166960K 153 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 54 0 in_multi 88 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 353 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 223 147K 175K 166960K 4078 0 UVM aobj 36 2K 3K 166960K 39 0 pinsyscall 44 88K 108K 166960K 1308 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 49 0 NDP 10 0K 2K 166960K 27 0 temp 70 8651K 8716K 166960K 4503 0 kqueue 13 20K 30K 166960K 53 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 44 0 41 1 0 1 1 0 8 0 rtentry 176 99 0 12 5 0 5 5 0 8 0 unpcb 144 178 0 159 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 154 0 148 7 0 7 7 0 8 5 arp 128 11 0 1 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 328 272 0 263 7 0 7 7 0 8 5 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 144 19 0 4 1 0 1 1 0 8 0 kcovpl 48 17 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 54 29 0 29 29 0 8 4 art_table 40 453 0 54 5 0 5 5 0 8 0 art_node 32 99 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 36 0 3 1 0 1 1 0 8 0 pool(0xffffffff838886c0:shmpl): page inconsistency: page 0xfffffd8064a6e000; 1 on list, 33 missing, 35 items per page dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1794 0 277 95 0 95 95 0 8 0 ffsino 296 1794 0 277 117 0 117 117 0 8 0 nchpl 144 2158 0 474 63 0 63 63 0 8 0 uvmvnodes 80 1956 0 0 40 0 40 40 0 8 0 vnodes 216 1956 0 0 109 0 109 109 0 8 0 namei 1024 6765 0 6765 2 0 2 2 0 8 2 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 7635 0 7634 10 2 8 8 1 8 7 plimitpl 152 74 0 51 2 0 2 2 0 8 1 sigapl 424 562 0 504 8 0 8 8 0 8 0 knotepl 120 87 0 0 3 0 3 3 0 8 0 kqueuepl 224 70 0 61 2 0 2 2 0 8 1 pipepl 344 136 0 109 3 0 3 3 0 8 0 fdescpl 528 539 0 505 3 0 3 3 0 8 0 filepl 160 2536 0 2329 16 0 16 16 0 8 6 lockfpl 104 35 0 31 1 0 1 1 0 8 0 lockfspl 48 16 0 13 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 52 0 29 1 0 1 1 0 8 0 ucredpl 104 490 0 472 1 0 1 1 0 8 0 zombiepl 144 506 0 504 1 0 1 1 0 8 0 processpl 1232 562 0 504 7 1 6 6 0 8 0 procpl 664 781 0 717 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 752 497 0 466 14 2 12 14 0 8 8 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1571 0 0 99 0 99 99 0 8 0 bufpl 280 3016 0 116 208 0 208 208 0 8 0 anonpl 32 5479 0 0 45 0 45 45 0 246 0 amapchunkpl 152 12866 0 12399 39 3 36 36 0 158 13 amappl16 200 2013 0 1994 5 3 2 5 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 109 0 98 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 1136 0 1103 2 0 2 2 0 8 0 amappl11 160 42 0 32 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 17 0 16 1 0 1 1 0 8 0 amappl7 128 115 0 104 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 114 0 108 1 0 1 1 0 8 0 amappl4 104 267 0 251 1 0 1 1 0 8 0 amappl3 96 2043 0 1934 4 0 4 4 0 8 0 amappl2 88 616 0 553 2 0 2 2 0 8 0 amappl1 80 8597 0 7960 14 0 14 14 0 8 0 amappl 88 3420 0 3265 5 0 5 5 0 92 1 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 38 0 3 1 0 1 1 0 8 0 uaddrrnd 24 539 0 505 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 539 0 505 1 0 1 1 0 8 0 vmmpekpl 168 5930 0 5889 3 0 3 3 0 8 0 vmmpepl 168 40408 0 38369 100 0 100 100 0 357 3 vmsppl 488 538 0 505 7 1 6 6 0 8 0 rwobjpl 80 15499 0 12612 59 0 59 59 0 8 0 pdppl 4096 1086 0 1010 114 30 84 96 0 8 8 pvpl 32 12548 0 0 102 0 102 102 0 265 0 pmappl 256 538 0 505 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 377 0 33 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b6ff0) 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 __mp_lock(ffffffff838ab148) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838ab148) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c46baf0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7222bc2ce600, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837b6ff0) 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 __mp_lock(ffffffff838ab148) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838ab148) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c46baf0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7222bc2ce600, count: -6 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(ffffffff83362765) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838886c0,1,ffff80002a3bd848) at pool_do_get+0x5df pool_get(ffffffff838886c0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4a8030,ffff80002a3bdaa0,0,ffff80002a3bd9f0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4a8030,ffff80002a3bdaa0,ffff80002a3bd9f0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002a3bdaa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bdaa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92de809df90, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83362765) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff838886c0,1,ffff80002a3bd848) at pool_do_get+0x5df pool_get(ffffffff838886c0,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c4a8030,ffff80002a3bdaa0,0,ffff80002a3bd9f0) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c4a8030,ffff80002a3bdaa0,ffff80002a3bd9f0) at sys_shmget+0x195 sys/kern/sysv_shm.c:482 syscall(ffff80002a3bdaa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bdaa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x92de809df90, count: -8