panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 303 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *264509 32150 0 0 0x4000000 0K syz-executor.4 514637 50352 0 0x2 0x4000000 1 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827495dd) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cae93,ffffffff828141b2,12f,ffffffff827dba2f) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000dc9800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303 if_clone_destroy(ffff800022d0cdf0) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806fab6200,80206979,ffff800022d0cdf0,ffff800021242850) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff800021242850,ffff800022d0cf08,ffff800022d0cf50) at sys_ioctl+0x4a2 syscall(ffff800022d0cfd0) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800022d0cfd0) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78af09034f0, 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: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 303 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827495dd) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cae93,ffffffff828141b2,12f,ffffffff827dba2f) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000dc9800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303 if_clone_destroy(ffff800022d0cdf0) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806fab6200,80206979,ffff800022d0cdf0,ffff800021242850) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff800021242850,ffff800022d0cf08,ffff800022d0cf50) at sys_ioctl+0x4a2 syscall(ffff800022d0cfd0) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800022d0cfd0) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78af09034f0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800022d0cba0 rbx 0xffffffff82b8eb8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff800021242850 r8 0 r9 0x8080808080808080 r10 0x952c7f15462242aa r11 0x70afa856a4300c26 r12 0xffffffff82b8e990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff8229d9e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d0cb90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.4) pid=264509 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212438a0,0xffffffff82ca0118 process=0xffff8000ffff8438 user=0xffff800022d08000, vmspace=0xfffffd8069dfdd00 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32150 105335 40487 0 2 0 syz-executor.4 *32150 264509 40487 0 7 0x4000000 syz-executor.4 57725 356592 14998 0 2 0 syz-executor.0 57725 256239 14998 0 3 0x4000080 fsleep syz-executor.0 57725 415562 14998 0 2 0x4000000 syz-executor.0 72512 184659 28237 0 2 0 syz-executor.5 72512 71852 28237 0 3 0x4000080 fsleep syz-executor.5 34911 510815 60317 0 2 0 syz-executor.7 45258 344979 50352 0 2 0x482 syz-executor.1 98890 309670 50352 0 2 0x2 syz-executor.2 85300 197305 50352 0 2 0x482 syz-executor.6 28237 228013 50352 0 2 0x482 syz-executor.5 60317 235311 50352 0 2 0x482 syz-executor.7 14998 21302 50352 0 2 0x482 syz-executor.0 68301 222180 1 0 3 0x100083 ttyopn getty 40487 160414 50352 0 2 0x482 syz-executor.4 32516 439431 0 0 3 0x14200 acct acct 38632 344408 0 0 3 0x14280 nfsidl nfsio 38654 502881 0 0 3 0x14280 nfsidl nfsio 90515 417675 0 0 3 0x14280 nfsidl nfsio 56000 332438 0 0 3 0x14280 nfsidl nfsio 70097 231164 0 0 3 0x14280 nfsidl nfsio 20079 21251 0 0 3 0x14280 nfsidl nfsio 35649 454176 0 0 3 0x14280 nfsidl nfsio 39559 34176 0 0 3 0x14280 nfsidl nfsio 37114 61429 0 0 3 0x14280 nfsidl nfsio 52153 472840 0 0 3 0x14280 nfsidl nfsio 53410 274344 0 0 3 0x14280 nfsidl nfsio 21424 122178 0 0 3 0x14280 nfsidl nfsio 42971 236772 0 0 3 0x14280 nfsidl nfsio 39993 413127 0 0 3 0x14280 nfsidl nfsio 4699 35576 0 0 3 0x14280 nfsidl nfsio 54155 365285 0 0 3 0x14280 nfsidl nfsio 51384 475100 0 0 3 0x14280 nfsidl nfsio 1712 111702 0 0 3 0x14280 nfsidl nfsio 19728 230989 0 0 3 0x14280 nfsidl nfsio 87848 216352 0 0 3 0x14280 nfsidl nfsio 38576 364899 0 0 3 0x14200 bored sosplice 50352 182437 88421 0 3 0x82 thrsleep syz-fuzzer 50352 473357 88421 0 2 0x4000482 syz-fuzzer 50352 315945 88421 0 3 0x4000082 thrsleep syz-fuzzer 50352 424849 88421 0 2 0x4000002 syz-fuzzer 50352 403026 88421 0 3 0x4000082 thrsleep syz-fuzzer 50352 514637 88421 0 7 0x4000002 syz-fuzzer 50352 41635 88421 0 3 0x4000082 wait syz-fuzzer 50352 85483 88421 0 3 0x4000082 kqread syz-fuzzer 50352 60103 88421 0 3 0x4000082 thrsleep syz-fuzzer 50352 156663 88421 0 3 0x4000082 thrsleep syz-fuzzer 50352 382485 88421 0 3 0x4000082 wait syz-fuzzer 50352 508012 88421 0 3 0x4000082 wait syz-fuzzer 50352 70690 88421 0 3 0x4000082 wait syz-fuzzer 50352 135522 88421 0 3 0x4000082 wait syz-fuzzer 50352 448844 88421 0 3 0x4000082 wait syz-fuzzer 50352 96254 88421 0 3 0x4000082 wait syz-fuzzer 88421 197215 87131 0 3 0x10008a sigsusp ksh 87131 428717 44463 0 3 0x9a kqread sshd 44463 126695 1 0 3 0x88 kqread sshd 54675 516866 28746 74 3 0x1100092 bpf pflogd 28746 129408 1 0 3 0x80 netio pflogd 63826 25002 59780 73 3 0x1100090 kqread syslogd 59780 393362 1 0 3 0x100082 netio syslogd 50905 37755 1 0 3 0x100080 kqread resolvd 86118 459835 59318 77 2 0x100092 dhcpleased 66523 362180 59318 77 3 0x100092 kqread dhcpleased 59318 109124 1 0 3 0x80 kqread dhcpleased 67960 260632 0 0 3 0x14200 bored smr 95394 188236 0 0 2 0x14200 zerothread 43168 271969 0 0 3 0x14200 aiodoned aiodoned 64233 361869 0 0 3 0x14200 syncer update 42041 157638 0 0 3 0x14200 cleaner cleaner 11826 209428 0 0 3 0x14200 reaper reaper 37477 352250 0 0 3 0x14200 pgdaemon pagedaemon 65309 293808 0 0 3 0x14200 bored viomb 19675 344057 0 0 3 0x40014200 acpi0 acpi0 69993 226250 0 0 3 0x40014200 idle1 90578 173344 0 0 3 0x14200 bored softnet 94395 415078 0 0 3 0x14200 bored softnet 6248 276791 0 0 3 0x14200 bored softnet 77301 385314 0 0 3 0x14200 bored softnet 37321 40213 0 0 3 0x14200 bored systqmp 60046 235410 0 0 3 0x14200 bored systq 81573 25622 0 0 3 0x40014200 bored softclock 47274 461962 0 0 3 0x40014200 idle0 1 47105 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32150 (syz-executor.4) thread 0xffff800021242850 (264509) exclusive rwlock clonelk r = 0 (0xffffffff82b7a780) #0 witness_lock+0x44d #1 if_clone_destroy+0x49 #2 ifioctl+0x3b4 sys/net/if.c:1924 #3 sys_ioctl+0x4a2 #4 syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] #4 syscall+0x57c sys/arch/amd64/amd64/trap.c:626 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82dc75e8) #0 witness_lock+0x44d #1 ifioctl+0x3ac sys/net/if.c:1924 #2 sys_ioctl+0x4a2 #3 syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] #3 syscall+0x57c sys/arch/amd64/amd64/trap.c:626 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 6515K 7404K 78643K 38810 0 pcb 14 16K 18K 78643K 2406 0 rtable 151 14K 17K 78643K 3050 0 ifaddr 79 26K 29K 78643K 1108 0 sysctl 3 1K 1K 78643K 7 0 counters 58 35K 36K 78643K 652 0 ioctlops 0 0K 4K 78643K 20425 0 iov 0 0K 40K 78643K 2603 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1620 101K 102K 78643K 28356 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 120 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 530 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 85K 78643K 15338 0 sigio 0 0K 0K 78643K 258 0 proc 71 91K 128K 78643K 2900 0 subproc 91 5K 6K 78643K 847 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1022 0 in_multi 62 4K 6K 78643K 1010 0 ether_multi 1 0K 0K 78643K 65 0 mrt 1 0K 0K 78643K 80 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 1K 78643K 3119 0 pfkey data 0 0K 0K 78643K 3 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 437 90K 111K 78643K 107995 0 UVM aobj 131 4K 4K 78643K 142 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 369 0 NDP 14 0K 2K 78643K 360 0 temp 134 5774K 6798K 78643K 120685 0 kqueue 12 18K 26K 78643K 1180 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 1098 0 1095 16 15 1 4 0 8 0 rtentry 112 972 0 912 5 2 3 4 0 8 0 unpcb 144 12448 0 12433 148 145 3 10 0 8 2 syncache 296 58 0 58 18 18 0 1 0 8 0 tcpqe 32 321 0 321 11 11 0 2 0 8 0 tcpcb 776 5076 0 5072 140 139 1 14 0 8 0 arp 120 149 0 139 1 0 1 1 0 8 0 inpcb 368 14221 0 14212 242 240 2 13 0 8 1 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 215 0 203 1 0 1 1 0 8 0 pkpcb 40 105 0 105 9 9 0 1 0 8 0 kcovpl 48 65 0 58 1 0 1 1 0 8 0 mppekey 1024 12 0 12 4 4 0 1 0 8 0 ppxss 1256 155 0 155 29 28 1 1 0 8 1 pppxif 1456 87 0 87 17 16 1 1 0 8 1 pfstscr 40 20 0 17 4 3 1 1 0 8 0 pffrag 232 52 0 49 6 5 1 1 0 482 0 pffrnode 88 52 0 49 6 5 1 1 0 8 0 pffrent 40 263 0 260 7 6 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1280 882 0 442 44 2 42 42 0 8 0 pfqueue 264 5 0 5 2 2 0 1 0 8 0 pfstitem 24 153 0 148 1 0 1 1 0 8 0 pfstkey 128 172 0 169 2 1 1 2 0 8 0 pfstate 384 162 0 157 5 3 2 5 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 17 0 17 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4412 0 4117 67 42 25 32 0 8 0 art_table 32 4413 0 4117 6 2 4 5 0 8 0 art_node 16 961 0 910 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 524 0 514 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 21335 0 19867 93 0 93 93 0 8 0 ffsino 272 21335 0 19867 99 0 99 99 0 8 0 nchpl 144 42049 0 40416 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 1 0 1 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 178307 0 178307 5 4 1 2 0 8 1 percpumem 16 339 0 297 1 0 1 1 0 8 0 vmpool 696 61 0 61 8 8 0 1 0 8 0 kstatmem 264 430 0 402 3 0 3 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 118113 0 118113 41 38 3 8 0 8 3 plimitpl 152 2031 0 2016 1 0 1 1 0 8 0 sigapl 424 15568 0 15501 9 1 8 8 0 8 0 futexpl 64 134903 0 134901 1 0 1 1 0 8 0 knotepl 120 937 0 0 11 0 11 11 0 8 0 kqueuepl 216 3704 0 3696 57 56 1 8 0 8 0 pipepl 320 3752 0 3727 92 89 3 9 0 8 0 fdescpl 496 15529 0 15503 6 2 4 5 0 8 0 filepl 152 128564 0 128342 194 180 14 24 0 8 3 lockfpl 104 5192 0 5190 14 12 2 2 0 8 1 lockfspl 48 1565 0 1563 1 0 1 1 0 8 0 sessionpl 144 85 0 69 1 0 1 1 0 8 0 pgrppl 48 115 0 99 1 0 1 1 0 8 0 ucredpl 104 15867 0 15854 1 0 1 1 0 8 0 zombiepl 144 15503 0 15501 3 2 1 1 0 8 0 processpl 1072 15568 0 15501 5 0 5 5 0 8 0 procpl 696 44501 0 44415 39 28 11 11 0 8 2 srpgc 96 97 0 97 25 24 1 1 0 8 1 sosppl 168 127 0 127 20 19 1 1 0 8 1 sockpl 488 27877 0 27850 620 608 12 34 0 8 8 mcl64k 65536 33 0 0 4 1 3 3 0 8 0 mcl16k 16384 39 0 0 5 2 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 28 0 0 2 1 1 2 0 8 0 mcl8k 8192 34 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 553 0 0 55 17 38 55 0 8 2 mtagpl 96 748 0 0 11 0 11 11 0 8 0 mbufpl 256 1881 0 0 79 0 79 79 0 8 0 bufpl 288 26170 0 19845 453 0 453 453 0 8 0 anonpl 24 3013466 0 2996424 232 104 128 144 0 186 5 amapchunkpl 152 310380 0 309618 85 51 34 46 0 158 0 amappl16 200 24458 0 23835 126 86 40 42 0 8 7 amappl15 192 83 0 82 1 0 1 1 0 8 0 amappl14 184 380 0 363 2 1 1 2 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 1193 0 1188 1 0 1 1 0 8 0 amappl11 160 61 0 46 1 0 1 1 0 8 0 amappl10 152 103 0 88 1 0 1 1 0 8 0 amappl9 144 1013 0 1012 3 2 1 1 0 8 0 amappl8 136 816 0 659 6 0 6 6 0 8 0 amappl7 128 328 0 300 2 0 2 2 0 8 0 amappl6 120 543 0 521 1 0 1 1 0 8 0 amappl5 112 555 0 546 1 0 1 1 0 8 0 amappl4 104 1219 0 1183 11 9 2 2 0 8 1 amappl3 96 46586 0 46531 2 0 2 2 0 8 0 amappl2 88 16837 0 16752 4 1 3 3 0 8 1 amappl1 80 354278 0 353528 26 8 18 23 0 8 0 amappl 88 106515 0 106305 8 2 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 72 141 0 11 3 0 3 3 0 8 0 uaddrrnd 24 15591 0 15565 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15591 0 15565 1 0 1 1 0 8 0 vmmpekpl 168 130891 0 130815 4 0 4 4 0 8 0 vmmpepl 168 1431376 0 1428427 442 287 155 189 0 357 1 vmsppl 368 15590 0 15565 4 1 3 4 0 8 0 rwobjpl 56 376438 0 368460 131 14 117 117 0 8 2 pdppl 4096 31189 0 31130 743 674 69 79 0 8 10 pvpl 32 5920911 0 5898089 464 242 222 265 0 265 8 pmappl 248 15590 0 15565 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1895 0 1015 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(ffffffff827495dd) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cae93,ffffffff828141b2,12f,ffffffff827dba2f) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000dc9800) at tun_clone_destroy+0x278 sys/net/if_tun.c:303 if_clone_destroy(ffff800022d0cdf0) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806fab6200,80206979,ffff800022d0cdf0,ffff800021242850) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff800021242850,ffff800022d0cf08,ffff800022d0cf50) at sys_ioctl+0x4a2 syscall(ffff800022d0cfd0) at syscall+0x57c mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800022d0cfd0) at syscall+0x57c sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78af09034f0, 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 __mp_lock(ffffffff82dc73e0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dc73e0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800021287330) at syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] syscall(ffff800021287330) at syscall+0x53d sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26b542c20, 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 __mp_lock(ffffffff82dc73e0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dc73e0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800021287330) at syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] syscall(ffff800021287330) at syscall+0x53d sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26b542c20, count: -6