panic: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/main/kernel/sys/kern/uipc_mbuf.c", line 1384 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *401313 49008 0 0 0x4000000 0 syz-executor.5 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82546c81) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825ba753,ffffffff825cb98f,568,ffffffff8255cdc2) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8062c83e00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002b1bb028,ffff800000c2c600,ffff80002b1bad08,ffff80002b1bac08) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002b1bb028,5) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002b1bae00) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd807cb436a0,ffff80002b1bb028,5,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8062491880,ffff80002b1bb028,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff800023121500,3,ffff80002b1bb028,1,ffff80002b1bb130) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002b1bb1a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e975068d10, count: 2 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/main/kernel/sys/kern/uipc_mbuf.c", line 1384 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82546c81) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825ba753,ffffffff825cb98f,568,ffffffff8255cdc2) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8062c83e00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002b1bb028,ffff800000c2c600,ffff80002b1bad08,ffff80002b1bac08) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002b1bb028,5) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002b1bae00) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd807cb436a0,ffff80002b1bb028,5,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8062491880,ffff80002b1bb028,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff800023121500,3,ffff80002b1bb028,1,ffff80002b1bb130) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002b1bb1a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e975068d10, count: -13 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002b1baa30 rbx 0 rdx 0 rcx 0 rax 0xffff800023121500 r8 0 r9 0x8080808080808080 r10 0xe67e5730acc0c675 r11 0x140a574dd1cf85f3 r12 0 r13 0xffffffbe r14 0 r15 0x1 rip 0xffffffff81929368 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002b1baa20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.5) pid=401313 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800023120fc0,0xffffffff8298c540 process=0xffff8000216c0818 user=0xffff80002b1b6000, vmspace=0xfffffd806257f778 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70598 182879 32347 0 2 0x480 syz-executor.1 70598 216868 32347 0 3 0x4000080 fsleep syz-executor.1 49008 123877 60653 0 2 0 syz-executor.5 49008 281999 60653 0 2 0x4000000 syz-executor.5 *49008 401313 60653 0 7 0x4000000 syz-executor.5 53649 465631 25861 0 2 0 syz-executor.2 53649 426159 25861 0 3 0x4000080 fsleep syz-executor.2 78818 116302 26028 0 2 0x482 syz-executor.4 15946 282855 26028 0 2 0x482 syz-executor.3 78238 513833 26028 0 3 0x82 nanoslp syz-executor.0 60653 422861 26028 0 2 0x482 syz-executor.5 32347 444179 26028 0 3 0x82 nanoslp syz-executor.1 80106 36597 26028 0 2 0x482 syz-executor.6 78687 59957 0 0 3 0x14200 acct acct 82974 257219 26028 0 2 0x482 syz-executor.7 25861 139984 26028 0 2 0x482 syz-executor.2 22553 405918 1 0 3 0x100083 ttyin getty 66888 413213 0 0 3 0x14280 nfsidl nfsio 47326 91735 0 0 3 0x14280 nfsidl nfsio 79412 449499 0 0 3 0x14280 nfsidl nfsio 98103 365462 0 0 3 0x14280 nfsidl nfsio 44356 276154 0 0 3 0x14280 nfsidl nfsio 6382 480544 0 0 3 0x14280 nfsidl nfsio 9283 250166 0 0 3 0x14280 nfsidl nfsio 66242 25694 0 0 3 0x14280 nfsidl nfsio 72385 334558 0 0 3 0x14280 nfsidl nfsio 56404 229845 0 0 3 0x14280 nfsidl nfsio 37976 321318 0 0 3 0x14280 nfsidl nfsio 33078 10801 0 0 3 0x14280 nfsidl nfsio 62244 433964 0 0 3 0x14280 nfsidl nfsio 64891 443567 0 0 3 0x14280 nfsidl nfsio 7739 455558 0 0 3 0x14280 nfsidl nfsio 98055 247736 0 0 3 0x14280 nfsidl nfsio 661 150702 0 0 3 0x14280 nfsidl nfsio 91482 300968 0 0 3 0x14280 nfsidl nfsio 49509 218039 0 0 3 0x14280 nfsidl nfsio 58255 297165 0 0 3 0x14280 nfsidl nfsio 64343 267279 0 0 3 0x14200 bored sosplice 26028 175409 8705 0 3 0x82 thrsleep syz-fuzzer 26028 400225 8705 0 3 0x4000082 thrsleep syz-fuzzer 26028 501533 8705 0 3 0x4000082 thrsleep syz-fuzzer 26028 102208 8705 0 3 0x4000082 thrsleep syz-fuzzer 26028 435153 8705 0 3 0x4000082 kqread syz-fuzzer 26028 73076 8705 0 3 0x4000082 thrsleep syz-fuzzer 26028 295930 8705 0 3 0x4000082 thrsleep syz-fuzzer 26028 372766 8705 0 3 0x4000082 thrsleep syz-fuzzer 8705 333793 7872 0 3 0x10008a sigsusp ksh 7872 194256 18132 0 3 0x9a kqread sshd 18132 51267 1 0 3 0x88 kqread sshd 62511 99365 65191 73 3 0x100090 kqread syslogd 65191 339188 1 0 3 0x100082 netio syslogd 24214 150663 1 0 3 0x100080 kqread resolvd 36346 320583 33905 77 3 0x100092 kqread dhcpleased 35866 227855 33905 77 3 0x100092 kqread dhcpleased 33905 329181 1 0 3 0x80 kqread dhcpleased 5685 89163 0 0 3 0x14200 bored smr 14907 497660 0 0 2 0x14200 zerothread 75838 6416 0 0 3 0x14200 aiodoned aiodoned 67422 181405 0 0 3 0x14200 syncer update 86081 381503 0 0 3 0x14200 cleaner cleaner 49544 265521 0 0 3 0x14200 reaper reaper 72050 84466 0 0 3 0x14200 pgdaemon pagedaemon 4112 226475 0 0 3 0x14200 bored viomb 53813 86855 0 0 3 0x40014200 acpi0 acpi0 81031 105332 0 0 3 0x14200 bored softnet 91264 115185 0 0 3 0x14200 bored systqmp 23098 414324 0 0 3 0x14200 bored systq 49044 278467 0 0 2 0x40014200 softclock 62604 423067 0 0 3 0x40014200 idle0 1 185734 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10242 6773K 7657K 78643K 85708 0 pcb 13 20K 22K 78643K 3715 0 rtable 198 16K 18K 78643K 8845 0 ifaddr 86 21K 25K 78643K 6731 0 sysctl 2 0K 0K 78643K 4 0 counters 26 17K 17K 78643K 225 0 ioctlops 0 0K 4K 78643K 8755 0 iov 1 12K 28K 78643K 1783 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1527 95K 96K 78643K 19755 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 149 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 2820 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 89K 78643K 17136 0 sigio 0 0K 0K 78643K 189 0 proc 71 71K 79K 78643K 2707 0 subproc 104 6K 10K 78643K 951 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 946 0 in_multi 87 5K 6K 78643K 1310 0 ether_multi 1 0K 0K 78643K 189 0 mrt 4 0K 0K 78643K 99 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 4475 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 7 26K 26K 78643K 7 0 UVM amap 549 1291K 1833K 78643K 208132 0 UVM aobj 131 7K 7K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1136 0 NDP 12 0K 2K 78643K 363 0 temp 130 4697K 4777K 78643K 135278 0 kqueue 13 20K 28K 78643K 1130 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1225 0 1222 16 13 3 5 0 8 2 rtentry 112 973 0 893 4 1 3 4 0 8 0 unpcb 136 10916 0 10903 102 101 1 9 0 8 0 syncache 296 30 0 30 9 9 0 1 0 8 0 tcpqe 32 124 0 124 4 4 0 1 0 8 0 tcpcb 736 5275 0 5198 179 171 8 15 0 8 0 arp 88 146 0 133 1 0 1 1 0 8 0 ipq 40 28 0 27 11 10 1 1 0 8 0 ipqe 40 337 0 336 11 10 1 1 0 8 0 inpcb 304 16231 0 16224 207 200 7 14 0 8 6 rttmr 72 32 0 32 9 9 0 1 0 8 0 ip6q 72 8 0 8 3 3 0 1 0 8 0 ip6af 40 13 0 13 3 3 0 1 0 8 0 nd6 48 247 0 225 1 0 1 1 0 8 0 pkpcb 40 88 0 88 10 10 0 1 0 8 0 kcovpl 48 68 0 60 1 0 1 1 0 8 0 ppxss 1152 30 0 30 10 10 0 1 0 8 0 pfstscr 40 88 0 86 3 2 1 1 0 8 0 pfosfp 40 41 0 39 1 0 1 1 0 8 0 pfosfpen 112 41 0 38 1 0 1 1 0 8 0 pfrktable 1344 2870 0 2868 16 15 1 2 0 8 0 pftag 88 46 0 40 3 2 1 1 0 8 0 pfqueue 264 12 0 7 1 0 1 1 0 8 0 pfstitem 24 96 0 92 1 0 1 1 0 8 0 pfstkey 112 290 0 286 3 2 1 1 0 8 0 pfstate 320 145 0 143 3 2 1 1 0 8 0 pfrule 1360 2424 0 2420 30 29 1 20 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 4765 0 4410 61 35 26 30 0 8 0 art_table 32 4767 0 4411 4 0 4 4 0 8 0 art_node 16 964 0 895 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semapl 112 2814 0 2804 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 25470 0 23964 95 0 95 95 0 8 0 ffsino 240 25470 0 23964 89 0 89 89 0 8 0 nchpl 144 49497 0 47869 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 192087 0 192087 5 4 1 2 0 8 1 vcpupl 1984 221 0 0 28 0 28 28 0 8 0 vmpool 528 264 0 43 17 2 15 15 0 8 0 pfiaddrpl 120 2277 0 2273 16 15 1 4 0 8 0 scsiplug 72 15 0 15 5 5 0 1 0 8 0 scxspl 216 141317 0 141317 34 33 1 8 0 8 1 plimitpl 152 2203 0 2189 1 0 1 1 0 8 0 sigapl 424 17320 0 17261 9 1 8 8 0 8 0 futexpl 64 176100 0 176098 2 1 1 1 0 8 0 knotepl 120 171969 0 171880 23 20 3 11 0 8 0 kqueuepl 184 5499 0 5490 80 79 1 9 0 8 0 pipepl 304 3295 0 3267 73 68 5 12 0 8 2 fdescpl 432 17283 0 17259 4 0 4 4 0 8 0 filepl 120 132079 0 131831 159 148 11 18 0 8 1 lockfpl 104 4184 0 4178 11 10 1 2 0 8 0 lockfspl 48 1290 0 1284 1 0 1 1 0 8 0 sessionpl 144 86 0 70 1 0 1 1 0 8 0 pgrppl 48 140 0 124 1 0 1 1 0 8 0 ucredpl 96 14169 0 14151 1 0 1 1 0 8 0 zombiepl 144 17261 0 17256 1 0 1 1 0 8 0 processpl 1000 17320 0 17256 10 1 9 9 0 8 0 procpl 672 43302 0 43227 16 8 8 9 0 8 0 sosppl 168 116 0 116 21 21 0 1 0 8 0 sockpl 448 28462 0 28439 516 505 11 30 0 8 8 mcl64k 65536 1035 0 1035 28 27 1 1 0 8 1 mcl16k 16384 211 0 211 37 37 0 1 0 8 0 mcl12k 12288 517 0 517 34 33 1 1 0 8 1 mcl9k 9216 250 0 250 40 39 1 1 0 8 1 mcl8k 8192 1491 0 1491 26 25 1 1 0 8 1 mcl4k 4096 2464 0 2464 13 12 1 1 0 8 1 mcl2k2 2112 161 0 161 42 41 1 1 0 8 1 mcl2k 2048 116073 0 115965 88 72 16 31 0 8 0 mtagpl 96 19157 0 17834 82 43 39 40 0 8 1 mbufpl 256 322203 0 320542 573 451 122 331 0 8 7 bufpl 288 33573 0 27164 458 0 458 458 0 8 0 anonpl 24 4811637 0 4791389 404 268 136 197 0 188 4 amapchunkpl 152 627367 0 626644 2007 1875 132 660 0 158 98 amappl16 200 50392 0 49574 262 216 46 62 0 8 0 amappl15 192 3972 0 3967 1 0 1 1 0 8 0 amappl14 184 4080 0 4075 1 0 1 1 0 8 0 amappl13 176 2632 0 2630 1 0 1 1 0 8 0 amappl12 168 2013 0 2008 1 0 1 1 0 8 0 amappl11 160 3173 0 3161 1 0 1 1 0 8 0 amappl10 152 1822 0 1817 1 0 1 1 0 8 0 amappl9 144 1401 0 1396 1 0 1 1 0 8 0 amappl8 136 3171 0 3056 5 0 5 5 0 8 0 amappl7 128 1489 0 1477 1 0 1 1 0 8 0 amappl6 120 1376 0 1346 2 1 1 2 0 8 0 amappl5 112 12880 0 12866 1 0 1 1 0 8 0 amappl4 104 8825 0 8792 2 0 2 2 0 8 0 amappl3 96 4857 0 4845 1 0 1 1 0 8 0 amappl2 88 5867 0 5801 3 1 2 3 0 8 0 amappl1 80 307438 0 306920 19 6 13 18 0 8 0 amappl 88 206181 0 205891 10 2 8 8 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 17547 0 17302 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17547 0 17302 2 0 2 2 0 8 0 vmmpekpl 168 118467 0 118389 4 0 4 4 0 8 0 vmmpepl 168 1586580 0 1583512 451 288 163 171 0 357 11 vmsppl 272 17546 0 17302 20 3 17 17 0 8 0 rwobjpl 24 373932 0 366006 52 2 50 50 0 8 0 pdppl 4096 35100 0 34825 1044 759 285 285 0 8 10 pvpl 32 8034368 0 8011193 626 412 214 329 0 265 8 pmappl 216 17546 0 17302 15 1 14 14 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 3270 0 2133 38 5 33 33 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82546c81) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825ba753,ffffffff825cb98f,568,ffffffff8255cdc2) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8062c83e00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002b1bb028,ffff800000c2c600,ffff80002b1bad08,ffff80002b1bac08) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002b1bb028,5) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002b1bae00) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd807cb436a0,ffff80002b1bb028,5,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8062491880,ffff80002b1bb028,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff800023121500,3,ffff80002b1bb028,1,ffff80002b1bb130) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002b1bb1a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e975068d10, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82546c81) at panic+0x161 sys/kern/subr_prf.c:202 __assert(ffffffff825ba753,ffffffff825cb98f,568,ffffffff8255cdc2) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8062c83e00,ffffffbe) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002b1bb028,ffff800000c2c600,ffff80002b1bad08,ffff80002b1bac08) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002b1bb028,5) at bpfwrite+0x128 sys/net/bpf.c:644 spec_write(ffff80002b1bae00) at spec_write+0xcb sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd807cb436a0,ffff80002b1bb028,5,fffffd807f7d87e0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8062491880,ffff80002b1bb028,1) at vn_write+0x19c sys/kern/vfs_vnops.c:414 dofilewritev(ffff800023121500,3,ffff80002b1bb028,1,ffff80002b1bb130) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys_pwritev sys/kern/vfs_syscalls.c:3383 [inline] sys_pad_pwritev(ffff800023121500,ffff80002b1bb0d8,ffff80002b1bb130) at sys_pad_pwritev+0xb9 sys/kern/vfs_syscalls.c:3439 syscall(ffff80002b1bb1a0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e975068d10, count: -13