panic: uvm_fault_unwire_locked: address not in map Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *469347 84717 0 0 0x4000000 1K syz-executor 523677 36794 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bbf6c) at panic+0x1e5 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire_locked+0x487 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1623 kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff800031f9cf58,ffff8000371d7df0,ffff8000371d7d40) at sys_sysctl+0x425 syscall(ffff8000371d7df0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7df0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a3e5ab2860, 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: uvm_fault_unwire_locked: address not in map ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bbf6c) at panic+0x1e5 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire_locked+0x487 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1623 kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff800031f9cf58,ffff8000371d7df0,ffff8000371d7d40) at sys_sysctl+0x425 syscall(ffff8000371d7df0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7df0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a3e5ab2860, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000371d7930 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff800031f9cf58 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x56edad4430f0f385 r11 0x63bfd6b24aee6d4b r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff82026195 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371d7920 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=469347 pid=84717 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800031f9c7c0,0xffff800031f9d700 process=0xffff80002d9704a8 user=0xffff8000371d2000, vmspace=0xfffffd806bbc2c68 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19937 4504 5233 0 2 0 syz-executor 19937 522303 5233 0 2 0x4000000 syz-executor 22103 256509 81928 0 2 0 syz-executor 22103 379388 81928 0 3 0x4000080 fsleep syz-executor 85724 40883 30698 0 2 0 syz-executor 85724 322213 30698 0 3 0x4000080 fsleep syz-executor 84717 99317 97415 0 2 0 syz-executor *84717 469347 97415 0 7 0x4000000 syz-executor 84717 218498 97415 0 3 0x4000080 fsleep syz-executor 46606 117674 75215 0 2 0 syz-executor 46606 272498 75215 0 3 0x4000080 fsleep syz-executor 36794 523677 27565 0 7 0 syz-executor 36794 167995 27565 0 3 0x4000080 kqpoll syz-executor 19815 451889 1945 0 2 0 syz-executor 19815 76329 1945 0 3 0x4000080 fsleep syz-executor 66317 258093 51007 0 2 0 syz-executor 66317 384557 51007 0 3 0x4000080 fsleep syz-executor 66317 254214 51007 0 3 0x4000080 pipewr syz-executor 66347 522614 0 0 3 0x14200 acct acct 81928 157145 79858 0 3 0x82 nanoslp syz-executor 27565 884 79858 0 3 0x82 nanoslp syz-executor 5233 136339 79858 0 3 0x82 nanoslp syz-executor 75215 368076 79858 0 3 0x82 nanoslp syz-executor 1945 161172 79858 0 3 0x82 nanoslp syz-executor 30698 35348 79858 0 3 0x82 nanoslp syz-executor 97415 141668 79858 0 3 0x82 nanoslp syz-executor 51007 354183 79858 0 3 0x82 nanoslp syz-executor 79858 275557 4826 0 3 0x82 kqread syz-executor 4826 104054 55901 0 3 0x10008a sigsusp ksh 55901 463709 29410 0 3 0x98 kqread sshd-session 29410 518994 52621 0 3 0x92 kqread sshd-session 74496 285684 1 0 3 0x100083 ttyin getty 52621 263809 1 0 3 0x88 kqread sshd 96353 352371 27737 74 3 0x1100092 bpf pflogd 27737 325117 1 0 3 0x80 sbwait pflogd 28487 268544 6243 73 3 0x1100090 kqread syslogd 6243 469644 1 0 3 0x100082 sbwait syslogd 52861 465597 1 0 3 0x100080 kqread resolvd 51285 194849 14183 77 3 0x100092 kqread dhcpleased 58074 248553 14183 77 3 0x100092 kqread dhcpleased 14183 100232 1 0 3 0x80 kqread dhcpleased 76880 139479 0 0 3 0x14200 bored smr 53865 363310 0 0 2 0x14200 zerothread 74867 438828 0 0 3 0x14200 aiodoned aiodoned 69643 395362 0 0 3 0x14200 syncer update 22969 398171 0 0 3 0x14200 cleaner cleaner 8409 379219 0 0 3 0x14200 reaper reaper 25407 201115 0 0 3 0x14200 pgdaemon pagedaemon 70467 55636 0 0 3 0x14200 bored viomb 92124 51853 0 0 3 0x40014200 acpi0 acpi0 30486 221048 0 0 3 0x40014200 idle1 39885 230170 0 0 3 0x14200 bored softnet3 83259 413988 0 0 3 0x14200 bored softnet2 44143 135268 0 0 3 0x14200 bored softnet1 49690 137167 0 0 3 0x14200 bored softnet0 41155 321416 0 0 3 0x14200 bored systqmp 47766 41200 0 0 3 0x14200 bored systq 96590 433180 0 0 3 0x14200 tmoslp softclockmp 3735 80373 0 0 3 0x40014200 tmoslp softclock 28257 22124 0 0 3 0x40014200 idle0 1 333567 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 84717 (syz-executor) thread 0xffff800031f9cf58 (469347) shared rwlock vmmaplk r = 0 (0xfffffd806bbc2d60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_fault_unwire+0x3e sys/uvm/uvm_fault.c:1622 #2 kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] #2 kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 #3 sys_sysctl+0x425 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83620e38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x2a6 sys/kern/kern_synch.c:423 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #6 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #7 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #8 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1602 #9 sysctl_vslock+0x109 sys/kern/kern_sysctl.c:191 #10 kern_sysctl+0x1ad sys/kern/kern_sysctl.c:504 #11 sys_sysctl+0x425 #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff8342f530) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:181 #3 kern_sysctl+0x1ad sys/kern/kern_sysctl.c:504 #4 sys_sysctl+0x425 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10326 11250K 11440K 166960K 11518 0 pcb 17 12K 12K 166960K 29 0 rtable 243 7K 7K 166960K 367 0 pf 34 17K 18K 166960K 51 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 59 0 sysctl 2 0K 0K 166960K 2 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1488 0 iov 0 0K 8K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1373 86K 87K 166960K 1443 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 223 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 128K 166960K 553 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 18 0 in_multi 99 7K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 365 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 237 72K 73K 166960K 3613 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 104K 166960K 1292 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 38 0 NDP 12 0K 2K 166960K 30 0 temp 39 6810K 6882K 166960K 5331 0 kqueue 14 22K 26K 166960K 37 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 36 0 33 1 0 1 1 0 8 0 rtentry 112 114 0 1 4 0 4 4 0 8 0 unpcb 144 83 0 66 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 21 0 17 1 0 1 1 0 8 0 arp 120 19 0 0 1 0 1 1 0 8 0 inpcb 336 134 0 124 2 0 2 2 0 8 1 nd6 136 25 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 1 0 1 1 0 8 1 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 31 0 0 1 0 1 1 0 8 0 pfstkey 128 31 0 0 1 0 1 1 0 8 0 pfstate 376 31 0 0 4 0 4 4 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 455 0 0 29 0 29 29 0 8 0 art_table 32 457 0 0 4 0 4 4 0 8 0 art_node 16 113 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 3 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1693 0 186 95 0 95 95 0 8 0 ffsino 272 1693 0 186 102 0 102 102 0 8 1 nchpl 144 2004 0 322 63 0 63 63 0 8 0 uvmvnodes 80 1850 0 0 38 0 38 38 0 8 0 vnodes 216 1850 0 0 103 0 103 103 0 8 0 namei 1024 6226 0 6226 2 0 2 2 0 8 2 percpumem 16 48 0 2 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scxspl 216 5925 0 5925 3 1 2 2 1 8 2 plimitpl 152 45 0 28 1 0 1 1 0 8 0 sigapl 424 522 0 471 8 1 7 7 0 8 1 futexpl 64 1403 0 1397 1 0 1 1 0 8 0 knotepl 120 308 0 0 10 0 10 10 0 8 0 kqueuepl 216 39 0 29 1 0 1 1 0 8 0 pipepl 320 115 0 86 3 0 3 3 0 8 0 fdescpl 496 503 0 471 5 0 5 5 0 8 0 filepl 152 2009 0 1755 13 0 13 13 0 8 2 lockfpl 104 40 0 38 1 0 1 1 0 8 0 lockfspl 48 18 0 16 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 165 0 152 1 0 1 1 0 8 0 zombiepl 144 471 0 471 1 0 1 1 0 8 1 processpl 1160 522 0 471 5 0 5 5 0 8 1 procpl 648 656 0 595 7 1 6 6 0 8 0 sockpl 664 256 0 227 4 0 4 4 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 267 0 0 17 0 17 17 0 8 0 bufpl 280 2410 0 97 166 0 166 166 0 8 0 anonpl 24 131888 0 128462 26 3 23 25 0 185 0 amapchunkpl 152 11363 0 10860 23 0 23 23 0 158 1 amappl16 200 3216 0 3194 5 2 3 5 0 8 1 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 117 0 104 1 0 1 1 0 8 0 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 1154 0 1122 4 1 3 3 0 8 1 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 11 0 10 1 0 1 1 0 8 0 amappl9 144 170 0 170 1 1 0 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 101 0 89 1 0 1 1 0 8 0 amappl6 120 163 0 161 1 0 1 1 0 8 0 amappl5 112 135 0 123 1 0 1 1 0 8 0 amappl4 104 354 0 336 1 0 1 1 0 8 0 amappl3 96 2034 0 1935 3 0 3 3 0 8 0 amappl2 88 759 0 675 3 0 3 3 0 8 1 amappl1 80 7731 0 7159 14 0 14 14 0 8 1 amappl 88 3237 0 3062 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 503 0 471 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 503 0 471 1 0 1 1 0 8 0 vmmpekpl 168 5466 0 5430 2 0 2 2 0 8 0 vmmpepl 168 38370 0 36481 84 0 84 84 0 357 1 vmsppl 448 502 0 471 6 1 5 5 0 8 1 rwobjpl 56 16340 0 13562 40 0 40 40 0 8 0 pdppl 4096 1013 0 942 99 28 71 85 0 8 0 pvpl 32 10442 0 0 86 1 85 85 0 265 0 pmappl 248 502 0 471 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 384 0 31 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8347eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x79c551dbbce0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff8347eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x79c551dbbce0, count: -3 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:437 panic(ffffffff830bbf6c) at panic+0x1e5 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire_locked+0x487 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1623 kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff800031f9cf58,ffff8000371d7df0,ffff8000371d7d40) at sys_sysctl+0x425 syscall(ffff8000371d7df0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7df0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a3e5ab2860, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bbf6c) at panic+0x1e5 sys/kern/subr_prf.c:198 uvm_fault_unwire_locked(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire_locked+0x487 sys/uvm/uvm_fault.c:1663 uvm_fault_unwire(fffffd806bbc2c68,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1623 kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371d7c84,5,20000100,ffff8000371d7cb8,0,37,a1bf655e499f37fc) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff800031f9cf58,ffff8000371d7df0,ffff8000371d7d40) at sys_sysctl+0x425 syscall(ffff8000371d7df0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371d7df0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a3e5ab2860, count: -8