panic: pool_do_get: fdescpl free list modified: page 0xfffffd806648a000; item addr 0xfffffd806648ad98; offset 0x48=0xdead4113 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 462097 96757 32767 0x10 0 1 syz-executor.6 *202135 91371 32767 0x10 0 0K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bd7c7) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82c89eb0,9,ffff800023cf8ef8) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82c89eb0,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff9928) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff9928) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff800029588350,ffff8000ffff9928,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000212142d8,1,ffffffff81cbbb00,0,ffff800023cf9140,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800023cf91c0) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800023cf91c0) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff9620, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_do_get: fdescpl free list modified: page 0xfffffd806648a000; item addr 0xfffffd806648ad98; offset 0x48=0xdead4113 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bd7c7) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82c89eb0,9,ffff800023cf8ef8) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82c89eb0,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff9928) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff9928) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff800029588350,ffff8000ffff9928,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000212142d8,1,ffffffff81cbbb00,0,ffff800023cf9140,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800023cf91c0) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800023cf91c0) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff9620, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800023cf8d40 rbx 0xffffffff82bf4b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff8000212142d8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1dbfd82d95dba4d r11 0xaf1a1758fd3da14f r12 0xffffffff82bf4990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff8149c648 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023cf8d30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=202135 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800021214590,0xffff800021215338 process=0xffff8000ffff9928 user=0xffff800023cf4000, vmspace=0xfffffd807effba50 estcpu=36, cpticks=1, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 60164 215570 19259 32767 2 0x10 syz-executor.4 513 177523 33638 32767 2 0x10 syz-executor.7 513 166871 33638 32767 3 0x4000090 fsleep syz-executor.7 513 41563 33638 32767 3 0x4000090 netcon syz-executor.7 59459 186362 79894 32767 2 0x490 syz-executor.3 59459 474206 79894 32767 3 0x4000090 netcon syz-executor.3 59459 171332 79894 32767 3 0x4000090 fsleep syz-executor.3 23166 296862 65012 32767 2 0x10 syz-executor.2 23166 246654 65012 32767 3 0x4000090 sysctllk syz-executor.2 23166 200147 65012 32767 3 0x4000090 fsleep syz-executor.2 31964 452784 78961 32767 3 0x90 nanoslp syz-executor.5 31964 177697 78961 32767 3 0x4000090 fsleep syz-executor.5 31964 74794 78961 32767 3 0x4000090 fsleep syz-executor.5 31964 286393 78961 32767 3 0x4000010 fdlock syz-executor.5 78961 54439 79761 32767 2 0x490 syz-executor.5 79761 210839 85745 0 3 0x82 wait syz-executor.5 11811 501194 0 0 3 0x14200 bored sosplice 96757 462097 62193 32767 7 0x10 syz-executor.6 33638 455854 96084 32767 3 0x90 nanoslp syz-executor.7 62193 80740 85745 0 3 0x82 wait syz-executor.6 96084 480925 85745 0 3 0x82 wait syz-executor.7 79894 92270 72898 32767 2 0x490 syz-executor.3 19259 476068 19711 32767 3 0x90 nanoslp syz-executor.4 19711 316236 85745 0 3 0x82 wait syz-executor.4 65012 397393 41945 32767 2 0x490 syz-executor.2 72898 336367 85745 0 3 0x82 wait syz-executor.3 *91371 202135 59115 32767 7 0x10 syz-executor.1 41945 138056 85745 0 3 0x82 wait syz-executor.2 5722 171030 84791 32767 2 0x10 syz-executor.0 59115 514002 85745 0 3 0x82 wait syz-executor.1 84791 424302 85745 0 3 0x82 wait syz-executor.0 85745 365494 50786 0 3 0x82 wait syz-fuzzer 85745 142573 50786 0 3 0x4000082 nanoslp syz-fuzzer 85745 343809 50786 0 3 0x4000082 wait syz-fuzzer 85745 302378 50786 0 3 0x4000082 thrsleep syz-fuzzer 85745 45203 50786 0 3 0x4000082 wait syz-fuzzer 85745 386878 50786 0 3 0x4000082 wait syz-fuzzer 85745 347191 50786 0 3 0x4000082 wait syz-fuzzer 85745 3710 50786 0 3 0x4000082 wait syz-fuzzer 85745 286050 50786 0 3 0x4000082 kqread syz-fuzzer 85745 425062 50786 0 3 0x4000082 thrsleep syz-fuzzer 85745 30307 50786 0 3 0x4000082 thrsleep syz-fuzzer 85745 49992 50786 0 3 0x4000082 thrsleep syz-fuzzer 85745 150463 50786 0 3 0x4000082 wait syz-fuzzer 85745 294238 50786 0 3 0x4000082 wait syz-fuzzer 85745 380959 50786 0 3 0x4000082 thrsleep syz-fuzzer 85745 70364 50786 0 3 0x4000082 thrsleep syz-fuzzer 50786 57812 69029 0 3 0x10008a sigsusp ksh 69029 349874 5778 0 3 0x9a kqread sshd 71767 159839 1 0 3 0x100083 ttyin getty 5778 156499 1 0 3 0x88 kqread sshd 62015 299867 49271 73 3 0x1100090 kqread syslogd 49271 25232 1 0 3 0x100082 netio syslogd 32326 508387 1 0 3 0x100080 kqread resolvd 48626 250184 11367 77 3 0x100092 kqread dhcpleased 26361 391838 11367 77 3 0x100092 kqread dhcpleased 11367 72788 1 0 3 0x80 kqread dhcpleased 81956 513405 0 0 3 0x14200 bored smr 63660 92351 0 0 2 0x14200 zerothread 32397 301429 0 0 3 0x14200 aiodoned aiodoned 89921 463036 0 0 3 0x14200 syncer update 21400 398676 0 0 3 0x14200 cleaner cleaner 27824 520464 0 0 3 0x14200 reaper reaper 12880 304036 0 0 3 0x14200 pgdaemon pagedaemon 93493 155279 0 0 3 0x14200 bored viomb 32813 122091 0 0 3 0x40014200 acpi0 acpi0 59540 197634 0 0 3 0x40014200 idle1 47653 98917 0 0 3 0x14200 bored softnet 93708 385460 0 0 3 0x14200 bored softnet 83815 399997 0 0 3 0x14200 bored softnet 77085 506516 0 0 3 0x14200 bored softnet 5037 400538 0 0 3 0x14200 bored systqmp 52328 444146 0 0 3 0x14200 bored systq 12419 418127 0 0 2 0x40014200 softclock 80832 194363 0 0 3 0x40014200 idle0 1 22964 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex fdescpl r = 0 (0xffffffff82c89ec0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:579 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1106 #5 process_new+0x2bc sys/kern/kern_fork.c:255 #6 fork1+0x30b sys/kern/kern_fork.c:379 #7 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #7 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #8 Xsyscall+0x128 Process 31964 (syz-executor.5) thread 0xffff800023cfa2e8 (286393) exclusive rwlock sysctllk r = 0 (0xffffffff82be1630) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234 #3 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #3 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #4 Xsyscall+0x128 Process 91371 (syz-executor.1) thread 0xffff8000212142d8 (202135) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82daf378) #0 witness_lock+0x44d #1 syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] #1 syscall+0x53d sys/arch/amd64/amd64/trap.c:626 #2 Xsyscall+0x128 exclusive mutex fdescpl r = 0 (0xffffffff82c89ec0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:579 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1106 #5 process_new+0x2bc sys/kern/kern_fork.c:255 #6 fork1+0x30b sys/kern/kern_fork.c:379 #7 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #7 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #8 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 6412K 6421K 78643K 11313 0 pcb 13 12K 14K 78643K 17 0 rtable 242 6K 7K 78643K 565 0 ifaddr 73 24K 24K 78643K 87 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 64 0 ioctlops 0 0K 2K 78643K 54 0 iov 0 0K 28K 78643K 1219 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1272 80K 80K 78643K 2451 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 102 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2698 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 5673 0 sigio 0 0K 0K 78643K 81 0 proc 56 78K 103K 78643K 905 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 809 0 in_multi 99 6K 7K 78643K 197 0 ether_multi 1 0K 0K 78643K 21 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 1K 78643K 1087 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 385 95K 111K 78643K 43498 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 281 0 NDP 11 0K 2K 78643K 33 0 temp 125 5779K 5906K 78643K 17359 0 kqueue 12 18K 25K 78643K 420 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 952 0 949 15 14 1 3 0 8 0 rtentry 112 139 0 25 4 0 4 4 0 8 0 unpcb 144 5090 0 5077 44 38 6 6 0 8 5 syncache 296 79 0 79 13 13 0 1 0 8 0 tcpqe 32 106 0 106 11 11 0 1 0 8 0 tcpcb 776 9543 0 9499 132 123 9 21 0 8 4 arp 120 24 0 5 1 0 1 1 0 8 0 ipq 40 10 0 6 4 3 1 1 0 8 0 ipqe 40 35 0 31 4 3 1 1 0 8 0 inpcb 368 12343 0 12294 136 127 9 19 0 8 4 nd6 48 34 0 7 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 555 0 91 30 0 30 30 0 8 0 art_table 32 556 0 91 4 0 4 4 0 8 0 art_node 16 138 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 2694 0 2684 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9086 0 7643 92 1 91 91 0 8 0 ffsino 272 9086 0 7643 98 1 97 97 0 8 0 nchpl 144 16680 0 15046 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 59420 0 59420 2 1 1 2 0 8 1 percpumem 16 45 0 2 1 0 1 1 0 8 0 kstatmem 264 26 0 4 2 0 2 2 0 8 0 scxspl 216 54094 0 54094 25 23 2 8 0 8 2 plimitpl 152 1163 0 1139 11 9 2 2 0 8 1 sigapl 424 5962 0 5910 7 0 7 7 0 8 0 futexpl 64 57318 0 57313 1 0 1 1 0 8 0 knotepl 120 450 0 0 10 1 9 10 0 8 0 kqueuepl 216 1577 0 1569 42 41 1 6 0 8 0 pipepl 320 1875 0 1847 60 56 4 13 0 8 1 fdescpl 496 5944 0 5910 6 1 5 6 0 8 0 pool(0xffffffff82c89eb0:fdescpl): page inconsistency: page 0xfffffd806648a000; 2 on list, 5 missing, 8 items per page filepl 152 49563 0 49290 94 78 16 20 0 8 5 lockfpl 104 513 0 511 1 0 1 1 0 8 0 lockfspl 48 208 0 206 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 668 0 652 1 0 1 1 0 8 0 ucredpl 104 6780 0 6762 1 0 1 1 0 8 0 zombiepl 144 5910 0 5910 1 0 1 1 0 8 1 processpl 1072 5963 0 5910 5 1 4 5 0 8 0 procpl 696 18196 0 18119 22 13 9 9 0 8 1 sosppl 168 64 0 62 11 10 1 1 0 8 0 sockpl 488 18550 0 18487 359 345 14 30 0 8 6 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 26 0 0 4 1 3 3 0 8 0 mcl4k 4096 34 0 0 4 1 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 328 0 0 31 3 28 31 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1524 0 0 81 0 81 81 0 8 0 bufpl 288 13968 0 7647 452 0 452 452 0 8 0 anonpl 24 1333970 0 1319588 216 105 111 136 0 186 0 amapchunkpl 152 173250 0 172439 121 78 43 47 0 158 8 amappl16 200 16810 0 16455 129 108 21 42 0 8 0 amappl15 192 30 0 28 1 0 1 1 0 8 0 amappl14 184 160 0 146 2 1 1 2 0 8 0 amappl13 176 14 0 12 1 0 1 1 0 8 0 amappl12 168 430 0 427 1 0 1 1 0 8 0 amappl11 160 47 0 36 1 0 1 1 0 8 0 amappl10 152 41 0 29 1 0 1 1 0 8 0 amappl9 144 980 0 980 3 2 1 1 0 8 1 amappl8 136 409 0 297 4 0 4 4 0 8 0 amappl7 128 161 0 138 2 0 2 2 0 8 0 amappl6 120 224 0 212 2 1 1 2 0 8 0 amappl5 112 217 0 210 1 0 1 1 0 8 0 amappl4 104 620 0 595 2 1 1 2 0 8 0 amappl3 96 18581 0 18518 3 1 2 3 0 8 0 amappl2 88 6629 0 6554 3 1 2 3 0 8 0 amappl1 80 140353 0 139584 27 9 18 26 0 8 0 amappl 88 42708 0 42485 7 1 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 5944 0 5910 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5944 0 5910 1 0 1 1 0 8 0 vmmpekpl 168 56470 0 56403 4 0 4 4 0 8 0 vmmpepl 168 561470 0 558644 213 76 137 148 0 357 2 vmsppl 440 5943 0 5910 5 0 5 5 0 8 0 rwobjpl 56 163262 0 155650 119 8 111 114 0 8 0 pdppl 4096 11895 0 11820 208 127 81 93 0 8 6 pvpl 32 2504110 0 2483630 491 292 199 361 0 265 12 pmappl 248 5943 0 5910 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1152 0 265 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827bd7c7) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82c89eb0,9,ffff800023cf8ef8) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82c89eb0,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff9928) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff9928) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff800029588350,ffff8000ffff9928,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000212142d8,1,ffffffff81cbbb00,0,ffff800023cf9140,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800023cf91c0) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800023cf91c0) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff9620, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 syscall(ffff80002a9fde70) at syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] syscall(ffff80002a9fde70) at syscall+0x53d sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0d80, count: 9 ddb{1}> trace x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 syscall(ffff80002a9fde70) at syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] syscall(ffff80002a9fde70) at syscall+0x53d sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff0d80, count: -6