panicW: ARpNooINl_G:ca ScPhLe _NiOtTe LmO_mWaERgEicD _OchNe ScYkS: CmAbLufL p2l 1c2pu86 f70re08e6 0li EsXtI Tmo 0d aif i eStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND *260304 52020 0 0x2 0 0 syz-executor.1 166593 45183 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff3b50, count: 14 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 pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f175e00+24 0x7867c85e7bbfb90f!=0x7867c8de04be430f ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff3b50, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800023189300 rbx 0 rdx 0xffff800020e6dad8 rcx 0 rax 0x3a r8 0xffffffff81f249ff kprintf+0x16f r9 0x1 r10 0x25 r11 0x3c937e49f4529919 r12 0 r13 0 r14 0xffff800020e6dad8 r15 0 rip 0xffffffff811db3f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800023189280 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.1) pid=260304 stat=onproc flags process=2 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020e6c9d8 process=0xffff800020ec9b00 user=0xffff800023184000, vmspace=0xfffffd807f0002e0 estcpu=36, cpticks=2, pctcpu=0.21 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87473 263912 52020 0 2 0 syz-executor.1 20319 491657 0 0 3 0x14200 bored sosplice 98276 98460 0 0 3 0x14200 acct acct 34091 90610 33015 0 3 0x2 biowait syz-executor.0 *52020 260304 33015 0 7 0x2 syz-executor.1 33015 134936 51682 0 3 0x82 thrsleep syz-fuzzer 33015 388806 51682 0 3 0x4000082 nanosleep syz-fuzzer 33015 338076 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 201373 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 212832 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 354755 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 149090 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 354128 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 262033 51682 0 3 0x4000082 thrsleep syz-fuzzer 33015 302728 51682 0 3 0x4000082 kqread syz-fuzzer 51682 392547 45183 0 3 0x10008a pause ksh 45183 166593 59867 0 7 0x12 sshd 33978 178524 1 0 3 0x100083 ttyin getty 59867 387122 1 0 3 0x80 select sshd 25384 341790 78481 74 3 0x100092 bpf pflogd 78481 76677 1 0 3 0x80 netio pflogd 85771 446130 25642 73 3 0x100090 kqread syslogd 25642 379814 1 0 3 0x100082 netio syslogd 20190 75084 1 77 3 0x100090 poll dhclient 53204 242965 1 0 3 0x80 poll dhclient 58423 165949 0 0 3 0x14200 bored smr 93986 296022 0 0 3 0x14200 pgzero zerothread 35567 116304 0 0 3 0x14200 aiodoned aiodoned 88474 302636 0 0 3 0x14200 syncer update 83892 357281 0 0 3 0x14200 cleaner cleaner 64951 153488 0 0 3 0x14200 reaper reaper 20245 371490 0 0 3 0x14200 pgdaemon pagedaemon 53446 426007 0 0 3 0x14200 bored crynlk 47116 35316 0 0 3 0x14200 bored crypto 54586 417751 0 0 3 0x40014200 acpi0 acpi0 55238 391535 0 0 3 0x40014200 idle1 89210 249204 0 0 3 0x14200 bored softnet 63989 123445 0 0 3 0x14200 bored systqmp 45903 145155 0 0 3 0x14200 bored systq 87761 254229 0 0 3 0x40014200 bored softclock 56646 38939 0 0 3 0x40014200 idle0 1 234850 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941 #4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790 #5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367 #6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274 #7 fork1+0x271 sys/kern/kern_fork.c:365 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 34091 (syz-executor.0) thread 0xffff800020e6c9c8 (90610) exclusive rrwlock inode r = 0 (0xfffffd807d04f3d0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b361918) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 52020 (syz-executor.1) thread 0xffff800020e6dad8 (260304) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82667e30) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570 #2 Xsyscall+0x128 exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8267a578) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_getpages+0x34e sys/uvm/uvm_pmemrange.c:941 #4 uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790 #5 uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367 #6 uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274 #7 fork1+0x271 sys/kern/kern_fork.c:365 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 45183 (sshd) thread 0xffff800020ede010 (166593) exclusive rwlock netlock r = 0 (0xffffffff824c3998) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:537 #3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9513 6483K 6806K 78643K 11040 0 pcb 13 8K 8K 78643K 135 0 rtable 74 2K 3K 78643K 339 0 ifaddr 73 15K 15K 78643K 98 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 16K 78643K 45 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1398 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 75 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 364 0 proc 61 63K 83K 78643K 510 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 51 0 in_multi 84 4K 4K 78643K 164 0 ether_multi 1 0K 0K 78643K 18 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 264 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 129 39K 55K 78643K 2121 0 UVM aobj 16 2K 2K 78643K 18 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 79 0 NDP 10 0K 0K 78643K 20 0 temp 93 3042K 3110K 78643K 3491 0 kqueue 3 4K 10K 78643K 10 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 arp 64 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 72 0 45 2 0 2 2 0 8 0 unpcb 120 161 0 151 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 426 0 426 1 1 0 1 0 8 0 tcpcb 544 171 0 167 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 280 559 0 552 3 1 2 2 0 8 1 rttmr 72 4 0 4 1 0 1 1 0 8 1 nd6 48 11 0 9 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 3 0 2 1 0 1 1 0 8 0 pffrent 40 50 0 49 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 41 0 11 1 0 1 1 0 8 0 pfstkey 112 41 0 11 1 0 1 1 0 8 0 pfstate 328 41 0 11 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 418 0 292 13 4 9 12 0 8 0 art_table 32 419 0 292 2 0 2 2 0 8 0 art_node 16 71 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 20 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 67 0 57 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1857 0 452 89 0 89 89 0 8 0 ffsino 272 1857 0 452 94 0 94 94 0 8 0 nchpl 144 2747 0 1153 60 0 60 60 0 8 0 uvmvnodes 72 2024 0 0 37 0 37 37 0 8 0 vnodes 208 2024 0 0 107 0 107 107 0 8 0 namei 1024 7471 0 7471 2 1 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 2 1 0 1 1 0 8 0 scxspl 192 6997 0 6995 10 9 1 7 0 8 0 plimitpl 152 45 0 37 1 0 1 1 0 8 0 sigapl 424 578 0 545 4 0 4 4 0 8 0 futexpl 56 5487 0 5487 2 1 1 1 0 8 1 knotepl 112 82 0 63 1 0 1 1 0 8 0 kqueuepl 144 22 0 20 1 0 1 1 0 8 0 pipelkpl 48 126 0 116 1 0 1 1 0 8 0 pipepl 120 252 0 233 1 0 1 1 0 8 0 fdescpl 496 561 0 545 3 0 3 3 0 8 0 filepl 152 3560 0 3460 5 0 5 5 0 8 1 lockfpl 104 93 0 92 1 0 1 1 0 8 0 lockfspl 48 35 0 34 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 357 0 348 1 0 1 1 0 8 0 zombiepl 144 545 0 545 2 1 1 1 0 8 1 processpl 984 578 0 545 6 1 5 5 0 8 0 procpl 624 1296 0 1254 4 0 4 4 0 8 0 sockpl 400 764 0 745 5 2 3 3 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 215 0 0 26 0 26 26 0 8 0 mtagpl 80 19 0 0 1 0 1 1 0 8 0 mbufpl 256 284 0 0 15 0 15 15 0 8 0 bufpl 280 4032 0 134 279 0 279 279 0 8 0 anonpl 16 68572 0 54644 78 21 57 71 0 124 0 amapchunkpl 152 4120 0 3991 23 6 17 20 0 158 11 amappl16 192 2691 0 1946 53 15 38 48 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 33 0 28 1 0 1 1 0 8 0 amappl13 168 31 0 30 1 0 1 1 0 8 0 amappl12 160 9 0 4 2 1 1 1 0 8 0 amappl11 152 186 0 170 1 0 1 1 0 8 0 amappl10 144 21 0 14 1 0 1 1 0 8 0 amappl9 136 535 0 532 1 0 1 1 0 8 0 amappl8 128 541 0 501 2 0 2 2 0 8 0 amappl7 120 132 0 120 1 0 1 1 0 8 0 amappl6 112 153 0 151 1 0 1 1 0 8 0 amappl5 104 338 0 323 1 0 1 1 0 8 0 amappl4 96 632 0 601 1 0 1 1 0 8 0 amappl3 88 111 0 105 1 0 1 1 0 8 0 amappl2 80 3448 0 3388 2 0 2 2 0 8 0 amappl1 72 22543 0 22119 24 14 10 18 0 8 0 amappl 80 1559 0 1517 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 17 0 2 1 0 1 1 0 8 0 uaddrrnd 24 564 0 547 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 564 0 547 1 0 1 1 0 8 0 vmmpekpl 168 8203 0 8166 2 0 2 2 0 8 0 vmmpepl 168 75070 0 73202 128 33 95 109 0 357 11 vmsppl 368 563 0 547 2 0 2 2 0 8 0 pdppl 4096 1136 0 1095 6 0 6 6 0 8 0 pvpl 32 215286 0 198269 179 25 154 170 0 265 15 pmappl 232 563 0 547 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 270 0 10 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff3b50, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 cnputc(65) at cnputc+0x4c sys/dev/cons.c:239 kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0c320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55 end trace frame: 0xffff800020ecf270, count: 0 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,65) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 cnputc(65) at cnputc+0x4c sys/dev/cons.c:239 kputchar(65,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc689) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc689) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82692510) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82692510,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a0c320) at tcp_output+0x14e6 tcp_usrreq(fffffd806eb39c88,9,fffffd807f01fb00,0,0,ffff800020ede010) at tcp_usrreq+0xa55 sosend(fffffd806eb39c88,0,ffff800020ecf338,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ede010,4,ffff800020ecf338,0,ffff800020ecf420) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ede010,ffff800020ecf3d0,ffff800020ecf420) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020ecf4a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ecf4a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7eb0, count: -19