panic: amap_pp_adjref: negative reference count Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 252371 34973 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83524561) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_pp_adjref(fffff0006e714740,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff0006e714740,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002d7ac6d0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff0007425f9a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80002a22b770,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff80002a22b770,ffff80002d7ac8a0,ffff80002d7ac7f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002d7ac8a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002d7ac8a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7454601fb0e0, count: 5 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: amap_pp_adjref: negative reference count ddb{1}> show kasan No such command ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83524561) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_pp_adjref(fffff0006e714740,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff0006e714740,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002d7ac6d0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff0007425f9a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80002a22b770,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff80002a22b770,ffff80002d7ac8a0,ffff80002d7ac7f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002d7ac8a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002d7ac8a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7454601fb0e0, count: -10 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002d7ac470 rbx 0xffff80002999ee0f rdx 0 rcx 0xffff80002a22b770 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9f0a446a5696a7c0 r11 0xc1a4eaf98097e57a r12 0xffff80002999ec10 r13 0 r14 0 r15 0x1 rip 0xffffffff8192df05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002d7ac460 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=87786 pid=51534 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=69, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a22b770 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a22c010,0xffff800045fe8fc0 process=0xffff800045fe79e0 user=0xffff80002d7a7000, vmspace=0xfffff0007425f9a0 estcpu=19, cpticks=11, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 34973 252371 23020 32767 7 0x10 0 syz-executor 34973 195061 23020 32767 2 0x10 0x4000080 syz-executor 55909 520389 53912 0 2 0x2 0 syz-executor 4319 435915 44473 32767 3 0x10 0x80 nanoslp syz-executor 4319 181840 44473 32767 3 0x10 0x4000080 msgwait syz-executor 21383 192536 80425 32767 3 0x10 0x80 nanoslp syz-executor 21383 491401 80425 32767 3 0x10 0x4000080 kqread syz-executor 21383 33981 80425 32767 3 0x10 0x4000080 fsleep syz-executor 26877 502509 55790 32767 3 0x11 0x80 nanoslp syz-executor 26877 30466 55790 32767 3 0x11 0x4000080 ttyin syz-executor 26877 25207 55790 32767 3 0x11 0x4000080 fsleep syz-executor 18607 284495 45553 32767 3 0x10 0x80 nanoslp syz-executor 18607 142100 45553 32767 3 0x10 0x4000080 lockf syz-executor 18607 72611 45553 32767 3 0x10 0x4000080 fsleep syz-executor 18607 103574 45553 32767 3 0x10 0x4000080 fsleep syz-executor 18607 342764 45553 32767 3 0x10 0x4000080 lockf syz-executor 44473 109205 86177 32767 3 0x10 0x80 nanoslp syz-executor 86177 509826 53912 0 3 0x2 0x80 wait syz-executor 55790 445081 55659 32767 3 0x10 0x80 nanoslp syz-executor 55659 338494 53912 0 3 0x2 0x80 wait syz-executor 45553 368762 89171 32767 3 0x10 0x80 nanoslp syz-executor 89171 84863 53912 0 3 0x2 0x80 wait syz-executor 78966 364232 77345 32767 2 0x10 0 syz-executor 77345 132900 53912 0 3 0x2 0x80 wait syz-executor 42637 128814 85391 32767 3 0x10 0x80 nanoslp syz-executor 85391 1972 53912 0 3 0x2 0x80 wait syz-executor 23020 202515 74570 32767 2 0x10 0xc80 syz-executor 74570 91736 53912 0 3 0x2 0x80 wait syz-executor 80425 268339 97085 32767 3 0x10 0x80 nanoslp syz-executor 97085 155602 53912 0 3 0x2 0x80 wait syz-executor 53912 405393 33733 0 3 0x2 0x80 kqread syz-executor 33733 26464 41330 0 3 0x100002 0x88 sigsusp ksh 41330 150821 44760 0 3 0x10 0x88 kqread sshd-session 44760 397416 72454 0 3 0x12 0x80 kqread sshd-session 67321 368246 1 0 3 0x100003 0x80 ttyin getty 72454 111165 1 0 3 0 0x88 kqread sshd 2780 197023 15663 73 3 0x1100010 0x80 kqread syslogd 15663 65221 1 0 3 0x100002 0x80 sbwait syslogd 40309 233797 1 0 3 0x100000 0x80 kqread resolvd 87936 346708 42362 77 3 0x100012 0x80 kqread dhcpleased 99538 70248 42362 77 3 0x100012 0x80 kqread dhcpleased 42362 158948 1 0 3 0 0x80 kqread dhcpleased 13095 427939 0 0 3 0x14000 0x200 bored smr 15423 367265 0 0 2 0x14000 0x200 zerothread 85834 358189 0 0 3 0x14000 0x200 aiodoned aiodoned 92989 404482 0 0 3 0x14000 0x200 syncer update 73797 75293 0 0 3 0x14000 0x200 cleaner cleaner 50893 424294 0 0 3 0x14000 0x200 reaper reaper 76179 373287 0 0 3 0x14000 0x200 pgdaemon pagedaemon 4657 516948 0 0 3 0x14000 0x200 bored viomb 27871 369963 0 0 3 0x14000 0x40000200 acpi0 acpi0 93755 307607 0 0 3 0x14000 0x40000200 idle1 99854 25040 0 0 3 0x14000 0x200 bored softnet1 28854 356100 0 0 2 0x14000 0x200 softnet0 12722 484773 0 0 3 0x14000 0x200 smrbar systqmp 10660 221858 0 0 3 0x14000 0x200 bored systq 9692 32310 0 0 3 0x14000 0x200 tmoslp softclockmp 54345 214091 0 0 3 0x14000 0x40000200 tmoslp softclock 53479 243594 0 0 3 0x14000 0x40000200 idle0 1 48479 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 78966 (syz-executor) thread 0xffff800045fe94e0 (364232) exclusive rrwlock inode r = 0 (0xfffff0006dd0e1f8) #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 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff0006ce27ea8) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 12722 (systqmp) thread 0xffff800045ffe000 (484773) shared rwlock systqmp r = 0 (0xffffffff839e2288) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11050 12016K 12034K 166960K 12174 0 pcb 17 12K 12K 166960K 17 0 rtable 215 6K 7K 166960K 658 0 pf 29 16K 16K 166960K 52 0 ifaddr 38 6K 7K 166960K 86 0 ifgroup 46 2K 2K 166960K 91 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 90 0 ioctlops 0 0K 2K 166960K 39 0 iov 0 0K 1K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1445 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 9 1K 2K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 78K 125K 166960K 382 0 proc 58 99K 180K 166960K 793 0 subproc 63 3K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 12 0 in_multi 88 5K 6K 166960K 213 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 510 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 175K 196K 166960K 4772 0 UVM aobj 4 2K 2K 166960K 5 0 pinsyscall 43 86K 110K 166960K 1774 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 14 0K 2K 166960K 57 0 temp 35 9115K 9135K 166960K 4868 0 kqueue 16 23K 26K 166960K 40 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 62 0 58 1 0 1 1 0 8 0 rtentry 176 221 0 122 5 0 5 5 0 8 0 unpcb 144 149 0 101 3 0 3 3 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 76 0 68 4 0 4 4 0 8 3 arp 136 38 0 22 1 0 1 1 0 8 0 inpcb 328 242 0 231 4 0 4 4 0 8 2 nd6 152 54 0 33 1 0 1 1 0 8 0 kcovpl 48 18 0 11 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 900 0 444 36 7 29 29 0 8 0 art_table 40 901 0 444 5 0 5 5 0 8 0 art_node 32 221 0 121 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 7 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1681 0 194 94 0 94 94 0 8 0 ffsino 296 1681 0 194 115 0 115 115 0 8 0 nchpl 144 1994 0 267 65 0 65 65 0 8 0 vnodes 216 1852 0 0 103 0 103 103 0 8 0 namei 1024 7977 0 7977 3 1 2 2 0 8 2 percpumem 16 61 0 11 1 0 1 1 0 8 0 kstatmem 264 45 0 22 2 0 2 2 0 8 0 scxspl 216 6894 0 6894 4 3 1 3 1 8 1 plimitpl 152 66 0 43 2 0 2 2 0 8 0 sigapl 424 667 0 616 7 0 7 7 0 8 0 knotepl 120 356 0 0 11 0 11 11 0 8 0 kqueuepl 224 71 0 28 3 0 3 3 0 8 0 pipepl 344 162 0 134 3 0 3 3 0 8 0 fdescpl 528 651 0 617 4 0 4 4 0 8 1 filepl 160 2380 0 2109 13 0 13 13 0 8 0 lockfpl 104 29 0 24 1 0 1 1 0 8 0 lockfspl 48 11 0 8 1 0 1 1 0 8 0 sessionpl 144 42 0 26 1 0 1 1 0 8 0 pgrppl 48 62 0 38 1 0 1 1 0 8 0 ucredpl 104 221 0 203 1 0 1 1 0 8 0 zombiepl 144 617 0 616 1 0 1 1 0 8 0 processpl 1232 667 0 616 5 0 5 5 0 8 0 procpl 664 819 0 758 7 0 7 7 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 454 0 391 8 0 8 8 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 1221 0 0 77 0 77 77 0 8 0 bufpl 272 2411 0 102 154 0 154 154 0 8 0 anonpl 32 5461 0 0 44 0 44 44 0 247 0 amapchunkpl 152 13371 0 12879 29 0 29 29 0 158 3 amappl16 200 1743 0 1723 5 2 3 5 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 533 0 532 1 0 1 1 0 8 0 amappl13 176 139 0 129 1 0 1 1 0 8 0 amappl12 168 934 0 902 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 140 0 138 1 0 1 1 0 8 0 amappl7 128 167 0 155 1 0 1 1 0 8 0 amappl6 120 250 0 249 1 0 1 1 0 8 0 amappl5 112 97 0 90 1 0 1 1 0 8 0 amappl4 104 306 0 290 1 0 1 1 0 8 0 amappl3 96 2246 0 2155 4 1 3 3 0 8 0 amappl2 88 763 0 690 2 0 2 2 0 8 0 amappl1 80 12885 0 12326 16 0 16 16 0 8 1 amappl 88 3861 0 3691 5 0 5 5 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 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 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 651 0 617 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 651 0 617 1 0 1 1 0 8 0 vmmpekpl 168 7394 0 7337 3 0 3 3 0 8 0 vmmpepl 168 52193 0 50291 104 1 103 103 0 357 9 vmsppl 488 650 0 616 7 1 6 6 0 8 0 rwobjpl 80 18133 0 17222 25 0 25 25 0 8 1 pdppl 4096 1309 0 1232 123 34 89 97 0 8 12 pvpl 32 13558 0 0 110 0 110 110 0 265 0 pmappl 256 650 0 616 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 525 0 45 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83997ff0) 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: 0x714519cf92a0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff83997ff0) 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: 0x714519cf92a0, 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(ffffffff83524561) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_pp_adjref(fffff0006e714740,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff0006e714740,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002d7ac6d0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff0007425f9a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80002a22b770,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff80002a22b770,ffff80002d7ac8a0,ffff80002d7ac7f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002d7ac8a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002d7ac8a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7454601fb0e0, count: 5 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83524561) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_pp_adjref(fffff0006e714740,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff0006e714740,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002d7ac6d0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff0007425f9a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80002a22b770,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff80002a22b770,ffff80002d7ac8a0,ffff80002d7ac7f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002d7ac8a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002d7ac8a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7454601fb0e0, count: -10