panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 315 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *206085 30764 0 0 0x4000000 1K syz-executor.2 451302 74480 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff82818b32,13b,ffffffff827e01fc) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d0f800) at tun_clone_destroy+0x278 sys/net/if_tun.c:315 if_clone_destroy(ffff800022d19310) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806d5e49a0,80206979,ffff800022d19310,ffff8000212958e0) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff8000212958e0,ffff800022d19428,ffff800022d19470) at sys_ioctl+0x4a2 syscall(ffff800022d194f0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d194f0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x23580974190, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 315 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff82818b32,13b,ffffffff827e01fc) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d0f800) at tun_clone_destroy+0x278 sys/net/if_tun.c:315 if_clone_destroy(ffff800022d19310) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806d5e49a0,80206979,ffff800022d19310,ffff8000212958e0) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff8000212958e0,ffff800022d19428,ffff800022d19470) at sys_ioctl+0x4a2 syscall(ffff800022d194f0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d194f0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x23580974190, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022d190c0 rbx 0xffff800020d69b8f rdx 0xffff800000ce8d80 rcx 0 rax 0xffff8000212958e0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x28a25b476b71815 r11 0x78c449279ebd1aec r12 0xffff800020d69990 r13 0 r14 0 r15 0x1 rip 0xffffffff81b420b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d190b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=206085 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff800021294890,0xffff800021294078 process=0xffff800027b9f690 user=0xffff800022d14000, vmspace=0xfffffd806b8856f8 estcpu=2, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52144 371918 35621 0 2 0 syz-executor.6 52235 256619 79606 0 2 0 syz-executor.1 24367 248502 37147 0 2 0 syz-executor.5 30764 496005 37319 0 2 0 syz-executor.2 *30764 206085 37319 0 7 0x4000000 syz-executor.2 10459 256589 63760 0 3 0x80 nanoslp syz-executor.0 10459 331211 63760 0 3 0x4000080 fsleep syz-executor.0 10459 39769 63760 0 3 0x4000080 fsleep syz-executor.0 7044 324850 74480 0 3 0x2 biowait syz-executor.7 9604 401570 74480 0 2 0x482 syz-executor.3 37319 62104 74480 0 3 0x82 nanoslp syz-executor.2 26227 275543 74480 0 3 0x82 nanoslp syz-executor.4 79606 171613 74480 0 3 0x82 nanoslp syz-executor.1 37147 375836 74480 0 3 0x82 nanoslp syz-executor.5 63760 32773 74480 0 3 0x82 nanoslp syz-executor.0 35621 66477 74480 0 3 0x82 nanoslp syz-executor.6 6322 26336 0 0 3 0x14280 nfsidl nfsio 46808 73260 0 0 3 0x14280 nfsidl nfsio 86433 162986 0 0 3 0x14280 nfsidl nfsio 96483 399307 0 0 3 0x14280 nfsidl nfsio 69840 36279 0 0 3 0x14280 nfsidl nfsio 40092 149280 0 0 3 0x14280 nfsidl nfsio 49185 467000 0 0 3 0x14280 nfsidl nfsio 59103 327704 0 0 3 0x14280 nfsidl nfsio 41413 35213 0 0 3 0x14280 nfsidl nfsio 90266 351571 0 0 3 0x14280 nfsidl nfsio 22094 122772 0 0 3 0x14280 nfsidl nfsio 27685 184642 0 0 3 0x14280 nfsidl nfsio 74573 350253 0 0 3 0x14280 nfsidl nfsio 31363 260768 0 0 3 0x14280 nfsidl nfsio 75039 317021 0 0 3 0x14280 nfsidl nfsio 46473 450461 0 0 3 0x14280 nfsidl nfsio 68783 68688 0 0 3 0x14280 nfsidl nfsio 57427 244884 0 0 3 0x14280 nfsidl nfsio 13724 41654 0 0 3 0x14280 nfsidl nfsio 4527 208291 0 0 3 0x14280 nfsidl nfsio 14280 442631 0 0 3 0x14200 bored sosplice 74480 461036 70161 0 3 0x82 thrsleep syz-fuzzer 74480 404270 70161 0 3 0x4000082 nanoslp syz-fuzzer 74480 379809 70161 0 3 0x4000082 thrsleep syz-fuzzer 74480 89841 70161 0 3 0x4000082 wait syz-fuzzer 74480 388671 70161 0 3 0x4000082 thrsleep syz-fuzzer 74480 451302 70161 0 7 0x4000002 syz-fuzzer 74480 150601 70161 0 3 0x4000082 wait syz-fuzzer 74480 478415 70161 0 3 0x4000082 wait syz-fuzzer 74480 119284 70161 0 3 0x4000082 thrsleep syz-fuzzer 74480 247237 70161 0 3 0x4000082 wait syz-fuzzer 74480 237110 70161 0 3 0x4000082 thrsleep syz-fuzzer 74480 208096 70161 0 3 0x4000082 wait syz-fuzzer 74480 220291 70161 0 3 0x4000082 wait syz-fuzzer 74480 98676 70161 0 3 0x4000082 wait syz-fuzzer 74480 328868 70161 0 3 0x4000082 kqread syz-fuzzer 74480 164294 70161 0 3 0x4000082 wait syz-fuzzer 70161 322831 66311 0 3 0x10008a sigsusp ksh 66311 510462 99096 0 3 0x9a kqread sshd 40514 352062 1 0 3 0x100083 ttyin getty 99096 347338 1 0 3 0x88 kqread sshd 59453 92223 73327 74 3 0x1100092 bpf pflogd 73327 314785 1 0 3 0x80 netio pflogd 51526 155232 84355 73 3 0x1100090 kqread syslogd 84355 226966 1 0 3 0x100082 netio syslogd 30332 269573 1 0 3 0x100080 kqread resolvd 4669 387783 65049 77 2 0x100092 dhcpleased 34803 588 65049 77 3 0x100092 kqread dhcpleased 65049 406601 1 0 3 0x80 kqread dhcpleased 18478 29262 0 0 3 0x14200 bored smr 39724 212200 0 0 2 0x14200 zerothread 27082 33752 0 0 3 0x14200 aiodoned aiodoned 70578 481093 0 0 3 0x14200 syncer update 68973 254528 0 0 3 0x14200 cleaner cleaner 38289 71677 0 0 3 0x14200 reaper reaper 23230 198632 0 0 3 0x14200 pgdaemon pagedaemon 11819 472348 0 0 3 0x14200 bored viomb 73910 223168 0 0 3 0x40014200 acpi0 acpi0 942 479767 0 0 3 0x40014200 idle1 26314 136772 0 0 3 0x14200 bored softnet 43584 422673 0 0 3 0x14200 bored softnet 43097 332021 0 0 3 0x14200 bored softnet 41186 432436 0 0 3 0x14200 bored softnet 64277 153943 0 0 3 0x14200 bored systqmp 21619 415315 0 0 3 0x14200 bored systq 79451 360721 0 0 3 0x40014200 bored softclock 8182 515438 0 0 3 0x40014200 idle0 1 315398 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10270 6654K 7387K 78643K 24755 0 pcb 13 16K 18K 78643K 1540 0 rtable 204 16K 17K 78643K 2046 0 ifaddr 85 27K 30K 78643K 726 0 sysctl 3 1K 1K 78643K 5 0 counters 60 35K 36K 78643K 408 0 ioctlops 0 0K 4K 78643K 2154 0 iov 0 0K 36K 78643K 5763 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1594 100K 100K 78643K 12538 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 114 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1629 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 8837 0 sigio 0 0K 0K 78643K 312 0 proc 70 91K 116K 78643K 2042 0 subproc 104 6K 7K 78643K 653 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1093 0 in_multi 70 4K 7K 78643K 757 0 ether_multi 1 0K 0K 78643K 81 0 mrt 1 0K 0K 78643K 34 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 2517 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 374 93K 108K 78643K 64779 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 309 0 NDP 16 0K 1K 78643K 257 0 temp 146 5779K 6803K 78643K 129759 0 kqueue 12 18K 28K 78643K 762 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 1100 0 1097 15 14 1 3 0 8 0 rtentry 112 629 0 546 4 1 3 4 0 8 0 unpcb 144 7853 0 7838 115 114 1 10 0 8 0 syncache 296 70 0 70 20 20 0 1 0 8 0 sackhl 24 8 0 8 8 8 0 1 0 8 0 tcpqe 32 1276 0 1276 14 14 0 2 0 8 0 tcpcb 776 3191 0 3186 136 129 7 8 0 8 6 arp 120 100 0 83 1 0 1 1 0 8 0 inpcb 368 10287 0 10277 331 322 9 14 0 8 8 nd6 48 146 0 129 1 0 1 1 0 8 0 pkpcb 40 18 0 18 5 5 0 1 0 8 0 kcovpl 48 50 0 42 1 0 1 1 0 8 0 ppxss 1256 89 0 89 25 25 0 1 0 8 0 pppxif 1456 20 0 20 9 9 0 1 0 8 0 pfstscr 40 35 0 35 1 1 0 1 0 8 0 pffrag 232 20 0 20 7 7 0 1 0 482 0 pffrnode 88 20 0 20 7 7 0 1 0 8 0 pffrent 40 45 0 45 8 8 0 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 449 0 195 29 7 22 27 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 90 0 88 1 0 1 1 0 8 0 pfstkey 128 90 0 88 2 1 1 2 0 8 0 pfstate 384 55 0 53 5 4 1 4 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 10 0 10 2 2 0 1 0 8 0 art_heap8 4096 7 0 6 6 5 1 2 0 8 0 art_heap4 256 2784 0 2431 49 25 24 29 0 8 0 art_table 32 2791 0 2437 5 1 4 4 0 8 0 art_node 16 627 0 554 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semapl 112 1627 0 1617 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 17876 0 16412 92 0 92 92 0 8 0 ffsino 272 17876 0 16412 98 0 98 98 0 8 0 nchpl 144 29708 0 28054 63 0 63 63 0 8 0 rtmask 32 7 0 7 3 3 0 1 0 8 0 uvmvnodes 80 6285 0 0 129 0 129 129 0 8 0 vnodes 216 6285 0 0 350 0 350 350 0 8 0 namei 1024 123475 0 123474 8 7 1 2 0 8 0 percpumem 16 217 0 174 1 0 1 1 0 8 0 vmpool 696 39 0 39 8 8 0 1 0 8 0 kstatmem 264 318 0 286 6 3 3 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 84703 0 84702 23 22 1 8 0 8 0 plimitpl 152 1007 0 991 1 0 1 1 0 8 0 sigapl 424 9095 0 9027 11 3 8 8 0 8 0 futexpl 64 87906 0 87904 12 11 1 1 0 8 0 knotepl 120 1566 0 0 14 3 11 12 0 8 0 kqueuepl 216 2045 0 2037 43 42 1 5 0 8 0 pipepl 320 2191 0 2163 62 59 3 8 0 8 0 fdescpl 496 9055 0 9027 7 3 4 5 0 8 0 filepl 152 88020 0 87778 300 286 14 21 0 8 3 lockfpl 104 2824 0 2822 8 7 1 4 0 8 0 lockfspl 48 932 0 930 2 1 1 2 0 8 0 sessionpl 144 62 0 45 1 0 1 1 0 8 0 pgrppl 48 232 0 215 1 0 1 1 0 8 0 ucredpl 104 32022 0 32010 1 0 1 1 0 8 0 zombiepl 144 9029 0 9027 2 1 1 1 0 8 0 processpl 1072 9095 0 9027 6 1 5 5 0 8 0 procpl 696 26381 0 26295 39 30 9 10 0 8 0 srpgc 96 62 0 62 15 15 0 1 0 8 0 sosppl 168 113 0 113 26 26 0 1 0 8 0 sockpl 488 19272 0 19245 671 659 12 37 0 8 8 mcl64k 65536 28 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 3 1 2 2 0 8 0 mcl8k 8192 57 0 0 4 1 3 3 0 8 0 mcl4k 4096 49 0 0 4 1 3 3 0 8 1 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 424 0 0 36 5 31 36 0 8 0 mtagpl 96 474 0 0 5 0 5 5 0 8 0 mbufpl 256 2627 0 0 84 2 82 84 0 8 0 bufpl 288 18032 0 11707 452 0 452 452 0 8 0 anonpl 24 1947555 0 1929443 276 139 137 181 0 186 0 amapchunkpl 152 186946 0 186155 158 121 37 64 0 158 0 amappl16 200 17301 0 16720 133 99 34 44 0 8 0 amappl15 192 8 0 6 1 0 1 1 0 8 0 amappl14 184 292 0 275 2 1 1 2 0 8 0 amappl13 176 14 0 14 4 4 0 1 0 8 0 amappl12 168 905 0 899 1 0 1 1 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 95 0 84 1 0 1 1 0 8 0 amappl9 144 1006 0 1006 21 21 0 1 0 8 0 amappl8 136 590 0 488 4 0 4 4 0 8 0 amappl7 128 283 0 255 2 0 2 2 0 8 0 amappl6 120 412 0 396 2 1 1 2 0 8 0 amappl5 112 425 0 415 1 0 1 1 0 8 0 amappl4 104 991 0 952 8 6 2 2 0 8 0 amappl3 96 27483 0 27431 2 0 2 2 0 8 0 amappl2 88 10110 0 10026 6 3 3 4 0 8 0 amappl1 80 211467 0 210716 36 17 19 28 0 8 1 amappl 88 63468 0 63270 6 0 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 9094 0 9066 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9094 0 9066 1 0 1 1 0 8 0 vmmpekpl 168 79820 0 79756 4 0 4 4 0 8 0 vmmpepl 168 866878 0 864003 459 310 149 167 0 357 1 vmsppl 440 9093 0 9066 7 3 4 5 0 8 0 rwobjpl 56 233387 0 225139 143 23 120 122 0 8 0 pdppl 4096 18195 0 18132 1111 1042 69 83 0 8 6 pvpl 32 4311150 0 4287539 684 458 226 366 0 265 0 pmappl 248 9093 0 9066 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2313 0 1438 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82b24ff0) 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021285430,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f end of kernel end trace frame: 0xc002ba3a18, count: 9 ddb{0}> trace x86_ipi_db(ffffffff82b24ff0) 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021285430,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f end of kernel end trace frame: 0xc002ba3a18, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff82818b32,13b,ffffffff827e01fc) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d0f800) at tun_clone_destroy+0x278 sys/net/if_tun.c:315 if_clone_destroy(ffff800022d19310) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806d5e49a0,80206979,ffff800022d19310,ffff8000212958e0) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff8000212958e0,ffff800022d19428,ffff800022d19470) at sys_ioctl+0x4a2 syscall(ffff800022d194f0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d194f0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x23580974190, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff82818b32,13b,ffffffff827e01fc) at __assert+0x25 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d0f800) at tun_clone_destroy+0x278 sys/net/if_tun.c:315 if_clone_destroy(ffff800022d19310) at if_clone_destroy+0x132 sys/net/if.c:1247 ifioctl(fffffd806d5e49a0,80206979,ffff800022d19310,ffff8000212958e0) at ifioctl+0x3b4 sys/net/if.c:1924 sys_ioctl(ffff8000212958e0,ffff800022d19428,ffff800022d19470) at sys_ioctl+0x4a2 syscall(ffff800022d194f0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d194f0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x23580974190, count: -9