panic: kernel diagnostic assertion "__mp_lock_held(&sched_lock, curcpu()) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_lock.c", line 63 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *137279 14287 32767 0x1810 0x4080080 0 syz-executor.5 365827 42097 32767 0x10 0 1 syz-executor.7 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825a1086) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613da6,ffffffff82617104,3f,ffffffff8264968f) at __assert+0x25 sys/kern/subr_prf.c:161 _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 single_thread_check_locked(ffff80002e4af260,1,c) at single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 single_thread_check(ffff80002e4af260,1) at single_thread_check+0x4b sys/kern/kern_sig.c:2057 sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sleep_signal_check sys/kern/kern_synch.c:464 [inline] sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sys/kern/kern_synch.c:400 rwsleep(ffff80002e4af260,ffffffff8296a1a0,120,ffffffff82595f34,0) at rwsleep+0xd5 sys/kern/kern_synch.c:314 futex_wait(6ba78891000,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff80002e4af260,ffff800022fca1b0,ffff800022fca210) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff800022fca280) at syscall+0x484 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022fca280) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ba65b34280, count: 3 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 "__mp_lock_held(&sched_lock, curcpu()) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_lock.c", line 63 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825a1086) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613da6,ffffffff82617104,3f,ffffffff8264968f) at __assert+0x25 sys/kern/subr_prf.c:161 _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 single_thread_check_locked(ffff80002e4af260,1,c) at single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 single_thread_check(ffff80002e4af260,1) at single_thread_check+0x4b sys/kern/kern_sig.c:2057 sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sleep_signal_check sys/kern/kern_synch.c:464 [inline] sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sys/kern/kern_synch.c:400 rwsleep(ffff80002e4af260,ffffffff8296a1a0,120,ffffffff82595f34,0) at rwsleep+0xd5 sys/kern/kern_synch.c:314 futex_wait(6ba78891000,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff80002e4af260,ffff800022fca1b0,ffff800022fca210) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff800022fca280) at syscall+0x484 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022fca280) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ba65b34280, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800022fc9de0 rbx 0xffffffff82989bb7 cpu_info_full_primary+0x2bb7 rdx 0 rcx 0 rax 0xffff80002e4af260 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9d99f62e4793d9fa r11 0x305ae01616068466 r12 0xffffffff829899b8 cpu_info_full_primary+0x29b8 r13 0 r14 0 r15 0x1 rip 0xffffffff813e2898 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022fc9dd0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.5) pid=137279 stat=onproc flags process=1810 proc=4080080 pri=59, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff80002e4af7a0,0xffffffff82adab00 process=0xffff8000fffe8868 user=0xffff800022fc5000, vmspace=0xfffffd8067e82a28 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14287 195493 85140 32767 2 0x3810 syz-executor.5 *14287 137279 85140 32767 7 0x4081890 syz-executor.5 42097 365827 75613 32767 7 0x10 syz-executor.7 47530 172477 91028 32767 3 0x90 nanoslp syz-executor.4 47530 293540 91028 32767 3 0x4000090 fsleep syz-executor.4 47530 353338 91028 32767 2 0x4000010 syz-executor.4 47530 146854 91028 32767 3 0x4000090 fsleep syz-executor.4 80879 497239 40954 32767 2 0x10 syz-executor.1 20399 473422 3373 32767 2 0x10 syz-executor.2 20399 256511 3373 32767 3 0x4000090 lockf syz-executor.2 55523 240805 0 0 3 0x14200 bored sosplice 97596 154955 64270 32767 3 0x90 piperd syz-executor.6 64270 380379 46088 0 3 0x82 wait syz-executor.6 75613 339557 49892 32767 3 0x90 nanoslp syz-executor.7 49892 400817 46088 0 3 0x82 wait syz-executor.7 85140 434554 48160 32767 3 0x90 nanoslp syz-executor.5 3373 153440 85920 32767 3 0x90 nanoslp syz-executor.2 48160 126218 46088 0 3 0x82 wait syz-executor.5 40954 359442 94635 32767 3 0x90 nanoslp syz-executor.1 91028 89161 96935 32767 3 0x90 nanoslp syz-executor.4 87613 102194 95478 32767 3 0x90 nanoslp syz-executor.3 96935 405363 46088 0 3 0x82 wait syz-executor.4 95478 165475 46088 0 3 0x82 wait syz-executor.3 85920 376986 46088 0 3 0x82 wait syz-executor.2 43603 3309 44125 32767 3 0x90 nanoslp syz-executor.0 94635 74263 46088 0 3 0x82 wait syz-executor.1 44125 16972 46088 0 3 0x82 wait syz-executor.0 46088 198063 13866 0 3 0x82 thrsleep syz-fuzzer 46088 279750 13866 0 3 0x4000082 nanoslp syz-fuzzer 46088 312965 13866 0 3 0x4000082 thrsleep syz-fuzzer 46088 68051 13866 0 3 0x4000082 thrsleep syz-fuzzer 46088 459596 13866 0 3 0x4000082 nanoslp syz-fuzzer 46088 353921 13866 0 3 0x4000082 thrsleep syz-fuzzer 46088 463102 13866 0 3 0x4000082 kqread syz-fuzzer 46088 473829 13866 0 3 0x4000082 thrsleep syz-fuzzer 46088 59820 13866 0 3 0x4000082 thrsleep syz-fuzzer 13866 140298 34409 0 3 0x10008a sigsusp ksh 34409 181201 95047 0 3 0x9a kqread sshd 133 140549 1 0 3 0x100083 ttyin getty 95047 405252 1 0 3 0x88 kqread sshd 64771 145777 13896 73 3 0x1100090 kqread syslogd 13896 299548 1 0 3 0x100082 netio syslogd 35428 174293 1 0 3 0x100080 kqread resolvd 88371 251342 66672 77 3 0x100092 kqread dhcpleased 3832 130019 66672 77 3 0x100092 kqread dhcpleased 66672 126494 1 0 3 0x80 kqread dhcpleased 35967 243714 0 0 3 0x14200 bored smr 11865 90423 0 0 2 0x14200 zerothread 80431 222301 0 0 3 0x14200 aiodoned aiodoned 55126 142571 0 0 3 0x14200 syncer update 63148 315583 0 0 3 0x14200 cleaner cleaner 84260 361294 0 0 3 0x14200 reaper reaper 49821 504273 0 0 3 0x14200 pgdaemon pagedaemon 50581 244009 0 0 3 0x14200 bored viomb 34531 484627 0 0 3 0x40014200 acpi0 acpi0 82882 3677 0 0 3 0x40014200 idle1 81336 430540 0 0 3 0x14200 bored softnet 85104 416642 0 0 3 0x14200 bored softnet 14859 379531 0 0 3 0x14200 bored softnet 99312 400095 0 0 3 0x14200 bored softnet 86013 299331 0 0 3 0x14200 bored systqmp 86701 62272 0 0 3 0x14200 bored systq 21188 239603 0 0 3 0x40014200 bored softclock 55397 235604 0 0 3 0x40014200 idle0 1 324511 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82a153e0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d4 sys/kern/sched_bsd.c:419 #3 single_thread_check_locked+0x17f sys/kern/kern_sig.c:2045 #4 single_thread_check+0x4b sys/kern/kern_sig.c:2057 #5 sleep_finish+0x75 sleep_signal_check sys/kern/kern_synch.c:464 [inline] #5 sleep_finish+0x75 sys/kern/kern_synch.c:400 #6 rwsleep+0xd5 sys/kern/kern_synch.c:314 #7 futex_wait+0x13c sys/kern/sys_futex.c:260 #8 sys_futex+0xf8 sys/kern/sys_futex.c:111 #9 syscall+0x484 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x484 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10185 6409K 6420K 78643K 11275 0 pcb 13 8K 8K 78643K 13 0 rtable 234 6K 6K 78643K 344 0 ifaddr 81 16K 16K 78643K 82 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 33 0 iov 0 0K 8K 78643K 113 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1424 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 13 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 20 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 113K 78643K 320 0 proc 56 78K 115K 78643K 468 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 6K 6K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 2K 78643K 608 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 7 26K 26K 78643K 7 0 UVM amap 225 78K 83K 78643K 3358 0 UVM aobj 20 2K 2K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 11 0K 2K 78643K 27 0 temp 89 4709K 4773K 78643K 3824 0 kqueue 12 18K 26K 78643K 44 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 37 0 34 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 136 123 0 110 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpcb 736 134 0 96 7 0 7 7 0 8 3 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 320 483 0 476 13 4 9 13 0 8 8 nd6 48 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 20 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1826 0 397 90 0 90 90 0 8 0 ffsino 272 1826 0 397 96 0 96 96 0 8 0 nchpl 144 2344 0 669 63 0 63 63 0 8 0 uvmvnodes 80 1939 0 0 40 0 40 40 0 8 0 vnodes 224 1939 0 0 115 0 115 115 0 8 0 namei 1024 8347 0 8347 2 1 1 2 0 8 1 percpumem 16 40 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 6642 0 6642 2 1 1 2 0 8 1 plimitpl 152 42 0 19 1 0 1 1 0 8 0 sigapl 424 597 0 543 7 0 7 7 0 8 0 futexpl 64 2035 0 2032 1 0 1 1 0 8 0 knotepl 120 103 0 0 4 0 4 4 0 8 0 kqueuepl 224 53 0 45 1 0 1 1 0 8 0 pipepl 336 153 0 125 3 0 3 3 0 8 0 fdescpl 496 579 0 545 7 1 6 6 0 8 0 filepl 152 3353 0 3052 15 0 15 15 0 8 3 lockfpl 104 30 0 26 1 0 1 1 0 8 0 lockfspl 48 12 0 9 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 27 0 11 1 0 1 1 0 8 0 ucredpl 104 628 0 610 1 0 1 1 0 8 0 zombiepl 144 545 0 543 1 0 1 1 0 8 0 processpl 1064 597 0 543 4 0 4 4 0 8 0 procpl 672 982 0 915 7 0 7 7 0 8 0 sockpl 480 651 0 628 22 11 11 21 0 8 8 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 154 0 0 19 0 19 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 289 0 0 19 1 18 18 0 8 0 bufpl 288 3833 0 145 264 0 264 264 0 8 0 anonpl 24 94912 0 82475 83 3 80 80 0 186 1 amapchunkpl 152 8352 0 7755 28 1 27 27 0 158 1 amappl16 200 1108 0 759 20 0 20 20 0 8 1 amappl15 192 71 0 66 1 0 1 1 0 8 0 amappl14 184 18 0 13 1 0 1 1 0 8 0 amappl13 176 106 0 101 1 0 1 1 0 8 0 amappl12 168 27 0 25 1 0 1 1 0 8 0 amappl11 160 138 0 119 1 0 1 1 0 8 0 amappl10 152 43 0 36 1 0 1 1 0 8 0 amappl9 144 532 0 527 1 0 1 1 0 8 0 amappl8 136 570 0 523 2 0 2 2 0 8 0 amappl7 128 130 0 119 1 0 1 1 0 8 0 amappl6 120 229 0 211 2 1 1 2 0 8 0 amappl5 112 231 0 213 1 0 1 1 0 8 0 amappl4 104 859 0 828 2 0 2 2 0 8 1 amappl3 96 1048 0 995 2 0 2 2 0 8 0 amappl2 88 885 0 811 3 0 3 3 0 8 1 amappl1 80 15559 0 14879 19 3 16 19 0 8 0 amappl 88 2933 0 2769 6 1 5 5 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 22 0 3 1 0 1 1 0 8 0 uaddrrnd 24 579 0 545 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 579 0 545 1 0 1 1 0 8 0 vmmpekpl 168 9157 0 9110 3 0 3 3 0 8 0 vmmpepl 168 57850 0 55311 125 0 125 125 0 357 5 vmsppl 368 578 0 545 4 0 4 4 0 8 0 rwobjpl 56 17285 0 14038 47 0 47 47 0 8 0 pdppl 4096 1165 0 1090 105 24 81 89 0 8 6 pvpl 32 304225 0 286767 234 3 231 234 0 265 83 pmappl 248 578 0 545 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 649 0 28 18 0 18 18 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(ffffffff825a1086) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613da6,ffffffff82617104,3f,ffffffff8264968f) at __assert+0x25 sys/kern/subr_prf.c:161 _kernel_lock() at _kernel_lock+0xb2 sys/kern/kern_lock.c:63 single_thread_check_locked(ffff80002e4af260,1,c) at single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2037 single_thread_check(ffff80002e4af260,1) at single_thread_check+0x4b sys/kern/kern_sig.c:2057 sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sleep_signal_check sys/kern/kern_synch.c:464 [inline] sleep_finish(ffff800022fca020,1) at sleep_finish+0x75 sys/kern/kern_synch.c:400 rwsleep(ffff80002e4af260,ffffffff8296a1a0,120,ffffffff82595f34,0) at rwsleep+0xd5 sys/kern/kern_synch.c:314 futex_wait(6ba78891000,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff80002e4af260,ffff800022fca1b0,ffff800022fca210) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff800022fca280) at syscall+0x484 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022fca280) at syscall+0x484 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ba65b34280, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020de8ff0) 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(ffffffff82a151d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a151d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(ffffffff82ba36d4,ffffffff) at wakeup_n+0x37 uvm_pmr_getpages(1,0,0,1,0,1,5fbf39e544bb6ef9,fffffd8065e655b8) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207 uvm_pagealloc(0,0,fffffd8065e655b8,2) at uvm_pagealloc+0x1a4 sys/uvm/uvm_page.c:910 uvm_fault_lower(ffff80002caa06b0,ffff80002caa06e8,ffff80002caa0630,0) at uvm_fault_lower+0x1aa uvm_fault(fffffd8067e828b8,b4d3342e000,0,2) at uvm_fault+0x238 upageflttrap(ffff80002caa0820,b4d3342ea00) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002caa0820) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0fa0, count: 3 ddb{1}> trace x86_ipi_db(ffff800020de8ff0) 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(ffffffff82a151d8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a151d8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(ffffffff82ba36d4,ffffffff) at wakeup_n+0x37 uvm_pmr_getpages(1,0,0,1,0,1,5fbf39e544bb6ef9,fffffd8065e655b8) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207 uvm_pagealloc(0,0,fffffd8065e655b8,2) at uvm_pagealloc+0x1a4 sys/uvm/uvm_page.c:910 uvm_fault_lower(ffff80002caa06b0,ffff80002caa06e8,ffff80002caa0630,0) at uvm_fault_lower+0x1aa uvm_fault(fffffd8067e828b8,b4d3342e000,0,2) at uvm_fault+0x238 upageflttrap(ffff80002caa0820,b4d3342ea00) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002caa0820) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0fa0, count: -12