panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 954 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *133040 19922 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8276b02b) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827e95e4,ffffffff827a87c3,3ba,ffffffff827c0b26) at __assert+0x29 sys/kern/subr_prf.c:157 rtrequest(1,ffff80002b29ff78,4,ffff80002b2a0020,0) at rtrequest+0xb67 sys/net/route.c:954 rt_ifa_add(ffff800000ccaf00,840100,ffff800000ccaf58,0) at rt_ifa_add+0x1ac sys/net/route.c:1134 in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002b2a0280,ffff800000d40000) at in_ioctl_change_ifaddr+0x63d sys/netinet/in.c:504 ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 pru_control sys/sys/protosw.h:365 [inline] ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 sys/net/if.c:2364 sys_ioctl(ffff8000fffeadd0,ffff80002b2a0390,ffff80002b2a03e0) at sys_ioctl+0x49e syscall(ffff80002b2a0460) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2c54b2b7230, count: 4 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 "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 954 ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8276b02b) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827e95e4,ffffffff827a87c3,3ba,ffffffff827c0b26) at __assert+0x29 sys/kern/subr_prf.c:157 rtrequest(1,ffff80002b29ff78,4,ffff80002b2a0020,0) at rtrequest+0xb67 sys/net/route.c:954 rt_ifa_add(ffff800000ccaf00,840100,ffff800000ccaf58,0) at rt_ifa_add+0x1ac sys/net/route.c:1134 in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002b2a0280,ffff800000d40000) at in_ioctl_change_ifaddr+0x63d sys/netinet/in.c:504 ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 pru_control sys/sys/protosw.h:365 [inline] ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 sys/net/if.c:2364 sys_ioctl(ffff8000fffeadd0,ffff80002b2a0390,ffff80002b2a03e0) at sys_ioctl+0x49e syscall(ffff80002b2a0460) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2c54b2b7230, count: -11 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002b29fd80 rbx 0x10000 __ALIGN_SIZE+0xf000 rdx 0xffff800000ce9140 rcx 0 rax 0xffff8000fffeadd0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc3503d8b70a7e3e9 r11 0x1e2a7e7c0b327b37 r12 0 r13 0xffff80002b29ff78 r14 0 r15 0x1 rip 0xffffffff812519ac db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002b29fd70 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=133040 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000216e38b8,0xffff8000216e30a0 process=0xffff8000216f53b0 user=0xffff80002b29b000, vmspace=0xfffffd8069d692f0 estcpu=28, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46901 308626 32571 0 2 0 syz-executor.1 43294 414007 63684 0 2 0 syz-executor.4 43294 489840 63684 0 3 0x4000080 fsleep syz-executor.4 9796 190605 11543 0 3 0x3000 suspend syz-executor.6 9796 36301 11543 0 2 0x4081000 syz-executor.6 19922 279013 47934 0 2 0 syz-executor.0 *19922 133040 47934 0 7 0x4000000 syz-executor.0 63160 26306 52027 0 3 0x3000 suspend syz-executor.7 63160 394513 52027 0 3 0x4081000 smrbar syz-executor.7 63684 183231 82759 0 3 0x82 nanoslp syz-executor.4 32571 16180 82759 0 2 0x482 syz-executor.1 75086 221403 0 0 3 0x14200 acct acct 85073 41038 82759 0 2 0x482 syz-executor.5 71175 258020 82759 0 2 0x2 syz-executor.2 52027 318544 82759 0 3 0x82 nanoslp syz-executor.7 72421 366181 0 0 3 0x14280 nfsidl nfsio 24087 509656 0 0 3 0x14280 nfsidl nfsio 27366 205202 0 0 3 0x14280 nfsidl nfsio 96296 220417 0 0 3 0x14280 nfsidl nfsio 81564 122462 0 0 3 0x14280 nfsidl nfsio 20061 44673 0 0 3 0x14280 nfsidl nfsio 81719 480868 0 0 3 0x14280 nfsidl nfsio 21516 383053 0 0 3 0x14280 nfsidl nfsio 68582 210137 0 0 3 0x14280 nfsidl nfsio 36531 275574 0 0 3 0x14280 nfsidl nfsio 44570 108755 0 0 3 0x14280 nfsidl nfsio 81668 46038 0 0 3 0x14280 nfsidl nfsio 75353 295641 0 0 3 0x14280 nfsidl nfsio 99524 64236 0 0 3 0x14280 nfsidl nfsio 6595 415456 0 0 3 0x14280 nfsidl nfsio 57235 319889 0 0 3 0x14280 nfsidl nfsio 72578 285875 0 0 3 0x14280 nfsidl nfsio 59250 260408 0 0 3 0x14280 nfsidl nfsio 53578 475845 0 0 3 0x14280 nfsidl nfsio 14767 184511 0 0 3 0x14280 nfsidl nfsio 84028 448406 82759 0 2 0x2 syz-executor.3 47934 87302 82759 0 3 0x82 nanoslp syz-executor.0 11543 55380 82759 0 3 0x82 nanoslp syz-executor.6 46135 320588 0 0 3 0x14200 bored sosplice 82759 359278 5661 0 3 0x82 wait syz-fuzzer 82759 186706 5661 0 3 0x4000082 nanoslp syz-fuzzer 82759 243006 5661 0 3 0x4000082 wait syz-fuzzer 82759 169920 5661 0 3 0x4000082 wait syz-fuzzer 82759 271479 5661 0 3 0x4000082 wait syz-fuzzer 82759 158391 5661 0 3 0x4000082 kqread syz-fuzzer 82759 44256 5661 0 3 0x4000082 thrsleep syz-fuzzer 82759 341903 5661 0 3 0x4000082 thrsleep syz-fuzzer 82759 76700 5661 0 3 0x4000082 wait syz-fuzzer 82759 493529 5661 0 3 0x4000082 thrsleep syz-fuzzer 82759 471340 5661 0 3 0x4000082 thrsleep syz-fuzzer 82759 335967 5661 0 3 0x4000082 wait syz-fuzzer 82759 175028 5661 0 3 0x4000082 wait syz-fuzzer 82759 367800 5661 0 3 0x4000082 wait syz-fuzzer 5661 263482 43557 0 3 0x10008a sigsusp ksh 43557 339446 47903 0 3 0x9a kqread sshd 95510 79571 1 0 3 0x100083 ttyin getty 47903 32545 1 0 3 0x88 kqread sshd 10910 512782 85977 73 3 0x1100090 kqread syslogd 85977 34148 1 0 3 0x100082 netio syslogd 73086 308773 1 0 3 0x100080 kqread resolvd 57149 389963 53899 77 3 0x100092 kqread dhcpleased 52495 300740 53899 77 3 0x100092 kqread dhcpleased 53899 160750 1 0 3 0x80 kqread dhcpleased 23176 73871 0 0 3 0x14200 bored smr 71766 98298 0 0 2 0x14200 zerothread 40018 88367 0 0 3 0x14200 aiodoned aiodoned 67374 48597 0 0 3 0x14200 syncer update 2294 45720 0 0 3 0x14200 cleaner cleaner 27849 2969 0 0 3 0x14200 reaper reaper 58514 233634 0 0 3 0x14200 pgdaemon pagedaemon 81801 121907 0 0 3 0x14200 bored viomb 9835 490983 0 0 3 0x40014200 acpi0 acpi0 15566 444711 0 0 3 0x14200 bored softnet3 69225 60344 0 0 3 0x14200 bored softnet2 78485 46383 0 0 3 0x14200 bored softnet1 44494 116777 0 0 3 0x14200 bored softnet0 12933 4773 0 0 3 0x14200 bored systqmp 7898 147840 0 0 3 0x14200 bored systq 54691 447462 0 0 2 0x40014200 softclock 18217 177476 0 0 3 0x40014200 idle0 1 73073 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 10175 6410K 7012K 78643K 13002 0 pcb 16 10K 11K 78643K 420 0 rtable 203 6K 7K 78643K 1154 0 ifaddr 72 21K 22K 78643K 508 0 sysctl 2 0K 0K 78643K 2 0 counters 28 17K 17K 78643K 160 0 ioctlops 0 0K 2K 78643K 196 0 iov 0 0K 16K 78643K 118 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1406 88K 88K 78643K 2537 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 18 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 209 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 73K 78643K 2986 0 sigio 0 0K 0K 78643K 71 0 proc 63 59K 83K 78643K 1229 0 subproc 104 6K 6K 78643K 364 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 99 0 in_multi 78 5K 6K 78643K 383 0 ether_multi 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 121 546K 546K 78643K 121 0 exec 0 0K 1K 78643K 793 0 pfkey data 0 0K 0K 78643K 13 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 292 81K 88K 78643K 26866 0 UVM aobj 20 2K 2K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 94 0 NDP 11 0K 2K 78643K 164 0 temp 124 5858K 5934K 78643K 40798 0 kqueue 12 18K 28K 78643K 136 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 120 121 0 118 1 0 1 1 0 8 0 rtentry 112 416 0 323 6 3 3 4 0 8 0 unpcb 144 1381 0 1368 9 8 1 6 0 8 0 syncache 296 41 0 41 3 3 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 180 0 180 6 6 0 1 0 8 0 tcpcb 776 653 0 649 12 11 1 7 0 8 0 arp 88 71 0 56 1 0 1 1 0 8 0 ipq 40 7 0 7 1 1 0 1 0 8 0 ipqe 40 14 0 14 1 1 0 1 0 8 0 inpcb 336 1853 0 1840 15 13 2 9 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 104 85 0 66 1 0 1 1 0 8 0 pkpcb 40 13 0 13 2 2 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1160 54 0 54 8 8 0 1 0 8 0 pppxif 1360 35 0 35 3 3 0 1 0 8 0 pfstscr 40 8 0 5 2 1 1 1 0 8 0 pfanchor 1288 12 0 12 1 1 0 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 16 0 14 2 1 1 1 0 8 0 pfstate 352 8 0 5 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1522 0 1137 51 26 25 29 0 8 0 art_table 32 1523 0 1137 5 1 4 4 0 8 0 art_node 16 402 0 319 1 0 1 1 0 8 0 sysvmsgpl 40 77 0 37 1 0 1 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 207 0 197 1 0 1 1 0 8 0 shmpl 112 17 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5230 0 3775 92 0 92 92 0 8 0 ffsino 240 5230 0 3775 87 0 87 87 0 8 0 nchpl 144 9571 0 9054 63 41 22 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 28376 0 28376 7 6 1 3 0 8 1 kstatmem 264 216 0 194 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 38673 0 38673 11 10 1 8 0 8 1 plimitpl 152 170 0 155 1 0 1 1 0 8 0 sigapl 424 3264 0 3199 8 0 8 8 0 8 0 futexpl 64 24699 0 24698 7 6 1 1 0 8 0 knotepl 120 31166 0 31086 51 46 5 33 0 8 2 kqueuepl 184 250 0 242 4 3 1 4 0 8 0 pipepl 288 396 0 368 11 8 3 7 0 8 0 fdescpl 432 3226 0 3200 4 0 4 4 0 8 0 filepl 120 13798 0 13556 18 10 8 14 0 8 0 lockfpl 104 400 0 398 2 1 1 2 0 8 0 lockfspl 48 124 0 122 1 0 1 1 0 8 0 sessionpl 144 43 0 27 1 0 1 1 0 8 0 pgrppl 48 43 0 27 1 0 1 1 0 8 0 ucredpl 104 1591 0 1581 1 0 1 1 0 8 0 zombiepl 144 3201 0 3199 2 1 1 1 0 8 0 processpl 1008 3264 0 3199 10 1 9 9 0 8 0 procpl 696 6343 0 6261 12 3 9 9 0 8 1 sosppl 168 13 0 13 1 1 0 1 0 8 0 sockpl 456 3368 0 3339 45 41 4 20 0 8 0 mcl64k 65536 178 0 178 7 7 0 1 0 8 0 mcl16k 16384 51 0 51 6 6 0 1 0 8 0 mcl12k 12288 45 0 45 6 6 0 1 0 8 0 mcl9k 9216 26 0 26 6 6 0 1 0 8 0 mcl8k 8192 70 0 70 6 6 0 1 0 8 0 mcl4k 4096 298 0 298 6 5 1 1 0 8 1 mcl2k2 2112 8 0 8 2 2 0 1 0 8 0 mcl2k 2048 22186 0 22135 63 54 9 26 0 8 0 mtagpl 96 46 0 46 2 2 0 1 0 8 0 mbufpl 256 76912 0 76765 122 108 14 107 0 8 0 bufpl 288 10012 0 3627 457 0 457 457 0 8 0 anonpl 24 483912 0 477456 169 108 61 113 0 188 9 amapchunkpl 152 93468 0 92834 79 49 30 54 0 158 2 amappl16 200 10824 0 10657 45 35 10 27 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 220 0 209 2 1 1 2 0 8 0 amappl13 176 12 0 10 1 0 1 1 0 8 0 amappl12 168 4146 0 4120 2 0 2 2 0 8 0 amappl11 160 55 0 44 1 0 1 1 0 8 0 amappl10 152 57 0 47 1 0 1 1 0 8 0 amappl9 144 200 0 199 3 2 1 2 0 8 0 amappl8 136 229 0 172 3 0 3 3 0 8 0 amappl7 128 58 0 42 1 0 1 1 0 8 0 amappl6 120 369 0 353 2 1 1 2 0 8 0 amappl5 112 269 0 263 1 0 1 1 0 8 0 amappl4 104 838 0 806 2 1 1 2 0 8 0 amappl3 96 17132 0 17059 3 0 3 3 0 8 0 amappl2 88 3422 0 3365 4 2 2 3 0 8 0 amappl1 80 20932 0 20431 21 9 12 21 0 8 0 amappl 88 26189 0 26002 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 19 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3226 0 3200 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3226 0 3200 1 0 1 1 0 8 0 vmmpekpl 168 24640 0 24585 3 0 3 3 0 8 0 vmmpepl 168 206254 0 204408 136 46 90 107 0 357 1 vmsppl 368 3225 0 3200 3 0 3 3 0 8 0 rwobjpl 24 59182 0 52122 45 2 43 43 0 8 0 pdppl 4096 6458 0 6400 220 156 64 68 0 8 6 pvpl 32 1253851 0 1241715 330 142 188 321 0 265 65 pmappl 216 3225 0 3200 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1163 0 400 25 0 25 25 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8276b02b) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827e95e4,ffffffff827a87c3,3ba,ffffffff827c0b26) at __assert+0x29 sys/kern/subr_prf.c:157 rtrequest(1,ffff80002b29ff78,4,ffff80002b2a0020,0) at rtrequest+0xb67 sys/net/route.c:954 rt_ifa_add(ffff800000ccaf00,840100,ffff800000ccaf58,0) at rt_ifa_add+0x1ac sys/net/route.c:1134 in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002b2a0280,ffff800000d40000) at in_ioctl_change_ifaddr+0x63d sys/netinet/in.c:504 ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 pru_control sys/sys/protosw.h:365 [inline] ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 sys/net/if.c:2364 sys_ioctl(ffff8000fffeadd0,ffff80002b2a0390,ffff80002b2a03e0) at sys_ioctl+0x49e syscall(ffff80002b2a0460) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2c54b2b7230, count: -11 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8276b02b) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827e95e4,ffffffff827a87c3,3ba,ffffffff827c0b26) at __assert+0x29 sys/kern/subr_prf.c:157 rtrequest(1,ffff80002b29ff78,4,ffff80002b2a0020,0) at rtrequest+0xb67 sys/net/route.c:954 rt_ifa_add(ffff800000ccaf00,840100,ffff800000ccaf58,0) at rt_ifa_add+0x1ac sys/net/route.c:1134 in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff800000d40000,ffff800000ccaf00,ffff800000ccaf58,1) at in_ifinit+0x36d sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80002b2a0280,ffff800000d40000) at in_ioctl_change_ifaddr+0x63d sys/netinet/in.c:504 ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 pru_control sys/sys/protosw.h:365 [inline] ifioctl(fffffd8067df1bf0,8040691a,ffff80002b2a0280,ffff8000fffeadd0) at ifioctl+0x1152 sys/net/if.c:2364 sys_ioctl(ffff8000fffeadd0,ffff80002b2a0390,ffff80002b2a03e0) at sys_ioctl+0x49e syscall(ffff80002b2a0460) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2c54b2b7230, count: -11