witness: lock order reversal: 1st 0xffffffff82cc8bd0 &sched_lock (&sched_lock) 2nd 0xffff8000295af798 &pr->ps_mtx (&pr->ps_mtx) lock order "&pr->ps_mtx"(mutex) -> "&sched_lock"(sched_lock) first seen at: #0 __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] #0 __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] #0 __mp_lock+0xa2 sys/kern/kern_lock.c:142 #1 donice+0x178 sys/kern/kern_resource.c:218 #2 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 lock order "&sched_lock"(sched_lock) -> "&pr->ps_mtx"(mutex) first seen at: #0 mtx_enter+0x3e sys/kern/kern_lock.c:265 #1 single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] #1 single_thread_set+0x35a sys/kern/kern_sig.c:2155 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000295af798,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295af798,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295af788) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff80002121b7f0,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff80002121b7f0,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff80002121b7f0,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff80002121b7f0,6,ffff800027f72f18) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff80002121b7f0) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff800027f73050) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff800027f73050) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d193413c90, count: -9 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff800027f72c20 rbx 0x3 rdx 0xffff800000d25280 rcx 0xffff80002121b7f0 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff800027f72b90 r9 0x8080808080808080 r10 0x8bae2d093db93bee r11 0x317abcc2d4e3ff2b r12 0xfffffd8003a0a850 r13 0 r14 0xfffffd80039fdb70 r15 0xfffffd80031c7bc0 rip 0xffffffff81b6e27c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800027f72c10 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=290131 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212252a8,0xffffffff82c90e98 process=0xffff8000295af688 user=0xffff800027f6e000, vmspace=0xfffffd806ba61930 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69030 385415 62186 32767 4 0x582010 syz-executor.1 *69030 290131 62186 32767 7 0x4502010 syz-executor.1 27724 381542 77371 32767 3 0x90 nanoslp syz-executor.2 27724 85816 77371 32767 3 0x4000090 fsleep syz-executor.2 27724 221050 77371 32767 3 0x4000090 fsleep syz-executor.2 54140 59960 94219 32767 3 0x90 nanoslp syz-executor.3 54140 233507 94219 32767 3 0x4000090 kqpoll syz-executor.3 54140 190248 94219 32767 3 0x4000090 fsleep syz-executor.3 54140 22318 94219 32767 3 0x4000090 fsleep syz-executor.3 40495 225680 49566 32767 3 0x90 nanoslp syz-executor.0 40495 65770 49566 32767 3 0x4000090 netcon2 syz-executor.0 29123 57065 0 0 3 0x14200 bored sosplice 62186 85866 55539 32767 3 0x90 nanoslp syz-executor.1 74815 374679 7009 32767 3 0x90 piperd syz-executor.6 71125 164400 49443 32767 3 0x90 nanoslp syz-executor.7 7009 162915 40637 0 3 0x82 wait syz-executor.6 33740 388286 60439 32767 3 0x90 nanoslp syz-executor.4 76579 446306 37812 32767 3 0x10 biowait syz-executor.5 49443 169487 40637 0 3 0x82 wait syz-executor.7 94219 247633 43139 32767 3 0x90 nanoslp syz-executor.3 77371 354809 37 32767 3 0x90 nanoslp syz-executor.2 55539 27597 40637 0 3 0x82 wait syz-executor.1 43139 8635 40637 0 3 0x82 wait syz-executor.3 60439 442383 40637 0 3 0x82 wait syz-executor.4 49566 505670 63116 32767 3 0x90 nanoslp syz-executor.0 37 331480 40637 0 3 0x82 wait syz-executor.2 37812 64288 40637 0 3 0x82 wait syz-executor.5 63116 32652 40637 0 3 0x82 wait syz-executor.0 40637 344448 32668 0 3 0x2000082 thrsleep syz-fuzzer 40637 348357 32668 0 3 0x6000082 nanoslp syz-fuzzer 40637 26166 32668 0 3 0x6000082 wait syz-fuzzer 40637 353433 32668 0 3 0x6000082 thrsleep syz-fuzzer 40637 299675 32668 0 3 0x6000082 wait syz-fuzzer 40637 23075 32668 0 3 0x6000082 thrsleep syz-fuzzer 40637 347930 32668 0 3 0x6000082 wait syz-fuzzer 40637 345578 32668 0 3 0x6000082 wait syz-fuzzer 40637 463623 32668 0 3 0x6000082 wait syz-fuzzer 40637 440537 32668 0 3 0x6000082 thrsleep syz-fuzzer 40637 366109 32668 0 3 0x6000082 wait syz-fuzzer 40637 249992 32668 0 3 0x6000082 wait syz-fuzzer 40637 112727 32668 0 3 0x6000082 wait syz-fuzzer 40637 97597 32668 0 3 0x6000082 kqread syz-fuzzer 40637 235849 32668 0 3 0x6000082 thrsleep syz-fuzzer 32668 22478 6947 0 3 0x10008a sigsusp ksh 6947 211894 39067 0 3 0x9a kqread sshd 82413 150251 1 0 3 0x100083 ttyin getty 39067 473119 1 0 3 0x88 kqread sshd 79781 313512 10069 73 3 0x1100090 kqread syslogd 10069 97485 1 0 3 0x100082 netio syslogd 33642 17395 1 0 3 0x100080 kqread resolvd 23866 395698 58581 77 3 0x100092 kqread dhcpleased 37397 264078 58581 77 3 0x100092 kqread dhcpleased 58581 105267 1 0 3 0x80 kqread dhcpleased 1958 31122 0 0 3 0x14200 bored smr 38236 321114 0 0 3 0x14200 pgzero zerothread 90941 370658 0 0 3 0x14200 aiodoned aiodoned 79429 47208 0 0 3 0x14200 syncer update 15520 163990 0 0 3 0x14200 cleaner cleaner 22989 376784 0 0 3 0x14200 reaper reaper 62509 257760 0 0 3 0x14200 pgdaemon pagedaemon 85509 421674 0 0 3 0x14200 bored viomb 80436 274909 0 0 3 0x40014200 acpi0 acpi0 37523 208842 0 0 7 0x40014200 idle1 17890 141964 0 0 3 0x14200 bored softnet3 22536 217573 0 0 3 0x14200 bored softnet2 58486 191013 0 0 3 0x14200 bored softnet1 16788 441896 0 0 3 0x14200 bored softnet0 61705 6868 0 0 3 0x14200 bored systqmp 45433 317025 0 0 3 0x14200 bored systq 99592 429772 0 0 3 0x40014200 bored softclock 7579 348170 0 0 3 0x40014200 idle0 1 54740 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 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 69030 (syz-executor.1) thread 0xffff80002121b7f0 (290131) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ca0228) #0 witness_lock+0x447 #1 postsig+0x49e sys/kern/kern_sig.c:1500 #2 userret+0x16e sys/kern/kern_sig.c:1987 #3 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #3 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #4 Xsyscall+0x128 exclusive sched_lock &sched_lock r = 0 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 76579 (syz-executor.5) thread 0xffff80002120caa0 (446306) exclusive rrwlock inode r = 0 (0xfffffd806823a708) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80781ce2c0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10189 6408K 6420K 78643K 11267 0 pcb 13 8K 8K 78643K 13 0 rtable 236 6K 7K 78643K 449 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 sysctl 1 1K 1K 78643K 1 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 32 0 iov 0 0K 16K 78643K 222 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1357 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 52 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 592 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 125K 78643K 1201 0 sigio 0 0K 0K 78643K 4 0 proc 56 78K 103K 78643K 537 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 152 0 in_multi 99 7K 7K 78643K 102 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 73 334K 334K 78643K 73 0 exec 0 0K 1K 78643K 447 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 337 86K 100K 78643K 14143 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 11 0K 2K 78643K 27 0 temp 74 5920K 6000K 78643K 6625 0 kqueue 13 20K 26K 78643K 178 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 75 0 72 1 0 1 1 0 8 0 rtentry 112 115 0 4 4 0 4 4 0 8 0 unpcb 144 1296 0 1273 14 8 6 6 0 8 5 syncache 304 19 0 19 3 2 1 1 0 8 1 tcpqe 32 567 0 567 4 4 0 2 0 8 0 tcpcb 808 622 0 612 15 7 8 8 0 8 6 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 7 0 6 1 0 1 1 0 8 0 inpcb 368 1066 0 1053 13 5 8 8 0 8 6 nd6 136 28 0 3 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 256 470 0 16 29 0 29 29 0 8 0 art_table 32 471 0 16 4 0 4 4 0 8 0 art_node 16 114 0 13 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 515 0 505 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2944 0 1501 92 1 91 91 0 8 0 ffsino 272 2944 0 1501 97 0 97 97 0 8 0 nchpl 144 4722 0 3043 63 0 63 63 0 8 0 uvmvnodes 80 3057 0 0 63 0 63 63 0 8 0 vnodes 216 3057 0 0 170 0 170 170 0 8 0 namei 1024 15917 0 15916 3 2 1 2 0 8 0 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 15682 0 15681 13 12 1 8 1 8 0 plimitpl 152 214 0 191 4 2 2 2 0 8 1 sigapl 424 1496 0 1443 8 1 7 7 0 8 0 futexpl 64 9828 0 9824 1 0 1 1 0 8 0 knotepl 120 586 0 0 17 0 17 17 0 8 0 kqueuepl 216 305 0 295 5 4 1 5 0 8 0 pipepl 320 287 0 259 9 1 8 8 0 8 5 fdescpl 496 1478 0 1445 8 3 5 6 0 8 0 filepl 152 9390 0 9143 23 8 15 17 0 8 4 lockfpl 104 62 0 60 1 0 1 1 0 8 0 lockfspl 48 24 0 22 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 34 0 18 1 0 1 1 0 8 0 ucredpl 104 795 0 777 1 0 1 1 0 8 0 zombiepl 144 1445 0 1443 1 0 1 1 0 8 0 processpl 1072 1496 0 1443 5 1 4 5 0 8 0 procpl 680 3522 0 3448 11 3 8 8 0 8 1 sosppl 168 23 0 23 3 2 1 1 0 8 1 sockpl 488 2558 0 2519 62 40 22 29 0 8 17 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 338 0 0 41 0 41 41 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 993 0 0 62 1 61 61 0 8 0 bufpl 288 6235 0 147 435 0 435 435 0 8 0 anonpl 24 282589 0 271477 71 1 70 70 0 186 0 amapchunkpl 152 53150 0 52267 55 15 40 52 0 158 2 amappl16 200 7001 0 6747 15 0 15 15 0 8 0 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 155 0 143 2 1 1 2 0 8 0 amappl13 176 17 0 17 2 2 0 1 0 8 0 amappl12 168 2113 0 2078 3 1 2 2 0 8 0 amappl11 160 70 0 58 1 0 1 1 0 8 0 amappl10 152 44 0 33 1 0 1 1 0 8 0 amappl9 144 265 0 263 1 0 1 1 0 8 0 amappl8 136 249 0 182 3 0 3 3 0 8 0 amappl7 128 68 0 57 2 0 2 2 0 8 0 amappl6 120 225 0 208 2 1 1 2 0 8 0 amappl5 112 210 0 201 1 0 1 1 0 8 0 amappl4 104 563 0 528 3 1 2 2 0 8 0 amappl3 96 9006 0 8919 4 1 3 3 0 8 0 amappl2 88 1770 0 1701 3 1 2 3 0 8 0 amappl1 80 13487 0 12963 22 9 13 22 0 8 0 amappl 88 13608 0 13374 8 1 7 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 1479 0 1446 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1479 0 1446 1 0 1 1 0 8 0 vmmpekpl 168 15903 0 15840 4 0 4 4 0 8 0 vmmpepl 168 105841 0 103625 115 9 106 111 0 357 1 vmsppl 464 1478 0 1446 8 3 5 6 0 8 0 rwobjpl 56 36393 0 31948 67 3 64 64 0 8 0 pdppl 4096 2966 0 2892 131 49 82 96 0 8 8 pvpl 32 658366 0 641416 358 70 288 357 0 265 144 pmappl 248 1478 0 1446 5 2 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 946 0 70 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000295af798,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295af798,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295af788) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff80002121b7f0,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff80002121b7f0,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff80002121b7f0,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff80002121b7f0,6,ffff800027f72f18) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff80002121b7f0) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff800027f73050) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff800027f73050) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d193413c90, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d58ff0) at sched_idle+0x41e sys/kern/kern_sched.c:188 end trace frame: 0x0, count: -5