panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 365869 54324 0 0 0 0 syz-executor *352427 78811 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8069dfb030,8805,fffffd80097fd6e8,ffff80002a27b9e0) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80002a27ba90) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48,ffff80002a27bb10) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80002a27bce8,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff80003c409250,ffffff9c,200000000300,206,bbaf7815,0,b7475dd02518dfdf) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff80003c409250,ffff80002a27bfa0,ffff80002a27bef0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80002a27bfa0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a27bfa0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe8ede7b30d0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: ffs_valloc: dup alloc ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8069dfb030,8805,fffffd80097fd6e8,ffff80002a27b9e0) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80002a27ba90) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48,ffff80002a27bb10) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80002a27bce8,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff80003c409250,ffffff9c,200000000300,206,bbaf7815,0,b7475dd02518dfdf) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff80003c409250,ffff80002a27bfa0,ffff80002a27bef0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80002a27bfa0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a27bfa0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe8ede7b30d0, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a27b770 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff80003c409250 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8c15db069528bf2f r11 0xd70510f07b7e9818 r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8340d295 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a27b760 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=352427 pid=78811 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=75, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2227d8,0xffff80002a223ca8 process=0xffff800038ba09c0 user=0xffff80002a277000, vmspace=0xfffffd800b063988 estcpu=25, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54324 365869 71738 0 7 0 syz-executor 54324 476488 71738 0 2 0x4000000 syz-executor 78811 509546 89216 0 2 0 syz-executor *78811 352427 89216 0 7 0x4000000 syz-executor 78811 238504 89216 0 3 0x4000000 inode syz-executor 49883 376341 9175 0 2 0 syz-executor 20025 416763 25086 0 2 0 syz-executor 65718 385604 54622 0 2 0x2 syz-executor 35714 218648 1 0 3 0x80 nanoslp init 48051 162307 0 0 3 0x14200 acct acct 89216 457027 54622 0 3 0x82 nanoslp syz-executor 3208 283785 54622 0 2 0x2 syz-executor 10474 257881 54622 0 2 0x10000002 syz-executor 71738 487804 54622 0 3 0x82 nanoslp syz-executor 9175 392616 54622 0 3 0x82 nanoslp syz-executor 25086 518394 54622 0 3 0x82 nanoslp syz-executor 54622 162915 1 0 3 0x82 wait syz-executor 32389 353707 0 0 3 0x14200 bored smr 59067 142874 0 0 2 0x14200 zerothread 64338 62784 0 0 3 0x14200 aiodoned aiodoned 24693 323242 0 0 3 0x14200 syncer update 12843 188932 0 0 3 0x14200 cleaner cleaner 5014 67458 0 0 3 0x14200 reaper reaper 45426 80645 0 0 3 0x14200 pgdaemon pagedaemon 89800 431842 0 0 3 0x14200 bored viomb 633 154253 0 0 3 0x40014200 acpi0 acpi0 70606 456828 0 0 3 0x40014200 idle1 16437 152419 0 0 3 0x14200 bored softnet1 8918 378618 0 0 3 0x14200 bored softnet0 27969 476879 0 0 3 0x14200 bored systqmp 85434 514361 0 0 3 0x14200 bored systq 54801 192046 0 0 3 0x14200 tmoslp softclockmp 92562 68032 0 0 3 0x40014200 tmoslp softclock 5952 375517 0 0 3 0x40014200 idle0 1 68347 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 78811 (syz-executor) thread 0xffff80003c409250 (352427) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e5f80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 getblk+0x197 sys/kern/vfs_bio.c:1013 #4 bread+0x45 bio_doread sys/kern/vfs_bio.c:418 [inline] #4 bread+0x45 sys/kern/vfs_bio.c:463 #5 ffs_vget+0x283 sys/ufs/ffs/ffs_vfsops.c:1249 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x50d sys/kern/vfs_vnops.c:118 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069dfb320) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x50d sys/kern/vfs_vnops.c:118 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069dfb0d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 vn_open+0x22e sys/kern/vfs_vnops.c:109 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12092K 12336K 166960K 12486 0 pcb 17 13K 13K 166960K 91 0 rtable 227 10K 12K 166960K 443 0 pf 39 18K 83K 166960K 134 0 ifaddr 39 6K 8K 166960K 55 0 ifgroup 51 2K 2K 166960K 76 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1558 0 iov 0 0K 12K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1323 83K 84K 166960K 1777 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 63 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 49K 101K 166960K 440 0 proc 12 17K 163K 166960K 584 0 subproc 64 4K 4K 166960K 145 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 21 0 in_multi 88 6K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 417 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 93 77K 173K 166960K 5684 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 15 30K 101K 166960K 1594 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 34 0 temp 71 9123K 9216K 166960K 22760 0 kqueue 1 2K 24K 166960K 68 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 44 0 44 1 0 1 1 0 8 1 rtentry 176 121 0 28 6 0 6 6 0 8 0 unpcb 144 234 0 234 3 0 3 3 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 123 0 122 6 0 6 6 0 8 5 arp 136 20 0 3 1 0 1 1 0 8 0 inpcb 328 371 0 370 6 0 6 6 0 8 5 nd6 152 27 0 4 2 0 2 2 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 16 0 9 1 0 1 1 0 8 0 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 5 0 5 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 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 pfrktable 1344 16 0 11 1 0 1 1 0 8 0 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 14 0 3 1 0 1 1 0 8 0 pftag 88 6 0 2 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 50 0 0 1 0 1 1 0 8 0 pfstkey 128 55 0 5 2 0 2 2 0 8 0 pfstate 448 53 0 3 6 0 6 6 0 8 0 pfrule 1360 30 0 22 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 509 0 102 30 0 30 30 0 8 3 art_table 40 512 0 102 5 0 5 5 0 8 0 art_node 32 121 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 60 0 50 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2136 0 656 93 0 93 93 0 8 0 ffsino 296 2136 0 656 115 0 115 115 0 8 0 nchpl 144 2715 0 1003 64 0 64 64 0 8 0 vnodes 216 2489 0 0 139 0 139 139 0 8 0 namei 1024 8902 0 8900 2 0 2 2 0 8 1 percpumem 16 57 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 2 1 0 1 1 0 8 0 kstatmem 264 39 0 14 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 10677 0 10677 9 2 7 8 1 8 7 plimitpl 152 68 0 59 1 0 1 1 0 8 0 sigapl 424 735 0 701 7 1 6 7 0 8 0 knotepl 120 544 0 0 17 0 17 17 0 8 0 kqueuepl 224 89 0 88 1 0 1 1 0 8 0 pipepl 344 165 0 138 3 0 3 3 0 8 0 fdescpl 528 718 0 702 3 0 3 3 0 8 0 filepl 160 3712 0 3567 12 0 12 12 0 8 3 lockfpl 104 260 0 260 1 0 1 1 0 8 1 lockfspl 48 88 0 88 1 0 1 1 0 8 1 sessionpl 144 39 0 37 1 0 1 1 0 8 0 pgrppl 48 59 0 49 1 0 1 1 0 8 0 ucredpl 104 559 0 556 1 0 1 1 0 8 0 zombiepl 144 703 0 701 1 0 1 1 0 8 0 processpl 1232 735 0 701 5 0 5 5 0 8 0 procpl 664 1205 0 1168 6 0 6 6 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 696 0 695 8 0 8 8 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 158 0 0 10 0 10 10 0 8 0 bufpl 280 4417 0 107 308 0 308 308 0 8 0 anonpl 32 9953 0 0 81 0 81 81 0 246 0 amapchunkpl 152 18053 0 17804 28 0 28 28 0 158 14 amappl16 200 2524 0 2508 19 9 10 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 428 0 428 1 0 1 1 0 8 1 amappl13 176 124 0 124 1 0 1 1 0 8 1 amappl12 168 981 0 968 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 68 0 68 1 0 1 1 0 8 1 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 100 0 99 1 0 1 1 0 8 0 amappl7 128 155 0 153 1 0 1 1 0 8 0 amappl6 120 170 0 170 1 0 1 1 0 8 1 amappl5 112 99 0 98 1 0 1 1 0 8 0 amappl4 104 305 0 303 1 0 1 1 0 8 0 amappl3 96 3352 0 3306 4 0 4 4 0 8 2 amappl2 88 552 0 543 2 0 2 2 0 8 0 amappl1 80 11555 0 11479 14 0 14 14 0 8 8 amappl 88 4864 0 4781 5 0 5 5 0 92 0 uvmvnodes 80 111 0 0 3 0 3 3 0 8 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 7 0 7 2 1 1 1 0 8 1 dma128 128 254 0 254 2 1 1 1 0 8 1 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 719 0 703 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 719 0 703 1 0 1 1 0 8 0 vmmpekpl 168 7802 0 7758 3 0 3 3 0 8 0 vmmpepl 168 54507 0 53905 97 1 96 97 0 357 59 vmsppl 488 718 0 703 5 1 4 5 0 8 0 rwobjpl 80 18243 0 17902 27 0 27 27 0 8 4 pdppl 4096 1445 0 1406 95 50 45 83 0 8 6 pvpl 32 15918 0 0 129 0 129 129 0 265 0 pmappl 256 718 0 703 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 53 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83913ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x78c6a51899e0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff83913ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x78c6a51899e0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd8069dfb030,8805,fffffd80097fd6e8,ffff80002a27b9e0) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80002a27ba90) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd8069e15b28,ffff80002a27bd18,ffff80002a27bd48,ffff80002a27bb10) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80002a27bce8,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff80003c409250,ffffff9c,200000000300,206,bbaf7815,0,b7475dd02518dfdf) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff80003c409250,ffff80002a27bfa0,ffff80002a27bef0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80002a27bfa0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a27bfa0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe8ede7b30d0, count: 4 ddb{1}>