panic: kernel diagnostic assertion "!ISSET(p->p_flag, P_WSLEEP) || p->p_stat == SSTOP" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_sched.c", line 251 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *247903 82498 32767 0x10 0 0K syz-executor.2 338205 4147 0 0x14000 0x600 1 update db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827982c8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82816ad1,ffffffff8276795e,fb,ffffffff828438c8) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82c0cff0,ffff8000212842f8,4e) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82c4da18) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82c4da18) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82c4da18,0) at softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:708 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x23 end of kernel end trace frame: 0x799c73f86ff0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "!ISSET(p->p_flag, P_WSLEEP) || p->p_stat == SSTOP" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_sched.c", line 251 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827982c8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82816ad1,ffffffff8276795e,fb,ffffffff828438c8) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82c0cff0,ffff8000212842f8,4e) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82c4da18) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82c4da18) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82c4da18,0) at softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:708 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x23 end of kernel end trace frame: 0x799c73f86ff0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000279b9240 rbx 0xffffffff82c0db8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff80002126adc8 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf5b00a165fdd26d2 r11 0xbcd465cbb4c432b4 r12 0xffffffff82c0d990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff8271e01c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000279b9230 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=247903 stat=onproc flags process=10 proc=0 pri=63, usrpri=63, nice=20 forw=0xffffffffffffffff, list=0xffff80002126bb60,0xffff80002126b600 process=0xffff80002121e190 user=0xffff8000279b4000, vmspace=0xfffffd806a38e760 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *82498 247903 8476 32767 7 0x10 syz-executor.2 82498 187772 8476 32767 3 0x4000090 fsleep syz-executor.2 82498 265 8476 32767 2 0x4000010 syz-executor.2 65123 415981 86660 32767 2 0x10 syz-executor.3 65123 337072 86660 32767 3 0x4000090 netio syz-executor.3 52573 83593 68898 32767 2 0x10 syz-executor.5 52573 351516 68898 32767 3 0x4000090 fsleep syz-executor.5 80350 479231 65719 32767 2 0x10 syz-executor.4 67217 86371 74065 32767 3 0x3810 suspend syz-executor.0 67217 195862 74065 32767 2 0x40818b0 syz-executor.0 6659 414078 93057 32767 2 0x10 syz-executor.1 6659 101319 93057 32767 3 0x4000090 fsleep syz-executor.1 72201 503479 8203 32767 2 0x10 syz-executor.6 1137 4607 83908 32767 2 0x10 syz-executor.7 1137 222841 83908 32767 2 0x4000010 syz-executor.7 1137 182183 83908 32767 2 0x4000010 syz-executor.7 8203 390420 72107 32767 2 0x10 syz-executor.6 72107 82307 37297 0 3 0x82 wait syz-executor.6 68898 83776 91905 32767 3 0x90 nanoslp syz-executor.5 91905 516327 37297 0 3 0x82 wait syz-executor.5 8476 25609 19887 32767 3 0x90 nanoslp syz-executor.2 19887 155943 37297 0 3 0x82 wait syz-executor.2 74065 26235 43225 32767 3 0x90 nanoslp syz-executor.0 43225 72569 37297 0 3 0x82 wait syz-executor.0 86660 179522 45852 32767 3 0x90 nanoslp syz-executor.3 45852 12337 37297 0 3 0x82 wait syz-executor.3 93057 78355 70139 32767 3 0x90 nanoslp syz-executor.1 70139 369302 37297 0 3 0x82 wait syz-executor.1 65719 136271 3082 32767 2 0x10 syz-executor.4 3082 131291 37297 0 3 0x82 wait syz-executor.4 83908 76772 65724 32767 3 0x90 nanoslp syz-executor.7 65724 171059 37297 0 3 0x82 wait syz-executor.7 34420 60104 0 0 3 0x14200 bored sosplice 37297 178011 18402 0 3 0x82 thrsleep syz-fuzzer 37297 321009 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 214987 18402 0 3 0x4000082 kqread syz-fuzzer 37297 12315 18402 0 3 0x4000082 wait syz-fuzzer 37297 302888 18402 0 3 0x4000082 wait syz-fuzzer 37297 390292 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 479638 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 41497 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 19690 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 38629 18402 0 3 0x4000082 wait syz-fuzzer 37297 171329 18402 0 3 0x4000082 thrsleep syz-fuzzer 37297 519396 18402 0 3 0x4000082 wait syz-fuzzer 37297 491096 18402 0 3 0x4000082 wait syz-fuzzer 37297 336618 18402 0 3 0x4000082 wait syz-fuzzer 37297 283705 18402 0 3 0x4000082 wait syz-fuzzer 37297 365140 18402 0 3 0x4000082 wait syz-fuzzer 18402 488549 30304 0 3 0x10008a sigsusp ksh 30304 225167 40891 0 3 0x9a kqread sshd 85621 68252 1 0 3 0x100083 ttyin getty 40891 411041 1 0 3 0x88 kqread sshd 87334 449373 92072 73 3 0x1100090 kqread syslogd 92072 426957 1 0 3 0x100082 netio syslogd 47589 284299 1 0 3 0x100080 kqread resolvd 50463 158156 92324 77 3 0x100092 kqread dhcpleased 60201 488203 92324 77 3 0x100092 kqread dhcpleased 92324 294369 1 0 3 0x80 kqread dhcpleased 99429 143413 0 0 3 0x14200 bored smr 7945 228778 0 0 2 0x14200 zerothread 55815 271828 0 0 3 0x14200 aiodoned aiodoned 4147 338205 0 0 7 0x14600 update 11336 520739 0 0 3 0x14200 cleaner cleaner 11030 394891 0 0 3 0x14200 reaper reaper 83910 269331 0 0 3 0x14200 pgdaemon pagedaemon 57599 74458 0 0 3 0x14200 bored viomb 79753 448395 0 0 3 0x40014200 acpi0 acpi0 63150 520757 0 0 3 0x40014200 idle1 78965 269393 0 0 3 0x14200 bored softnet3 51753 395009 0 0 3 0x14200 bored softnet2 67621 183940 0 0 3 0x14200 bored softnet1 59841 275748 0 0 3 0x14200 bored softnet0 59320 71728 0 0 3 0x14200 bored systqmp 15164 480447 0 0 3 0x14200 bored systq 50200 116442 0 0 3 0x40014200 bored softclock 89997 423205 0 0 3 0x40014200 idle0 1 280006 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 (0xffffffff82c4d9d0) #0 witness_lock+0x447 #1 schedcpu+0x119 sys/kern/sched_bsd.c:218 #2 timeout_run+0xd0 sys/kern/kern_timeout.c:638 #3 softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 #4 softclock+0x130 sys/kern/kern_timeout.c:708 #5 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x23 shared mutex timeout r = 0 (0xffffffff82c06f80) #0 witness_lock+0x447 #1 timeout_run+0xbb sys/kern/kern_timeout.c:634 #2 softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 #3 softclock+0x130 sys/kern/kern_timeout.c:708 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x23 Process 82498 (syz-executor.2) thread 0xffff80002126adc8 (247903) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d82080) #0 witness_lock+0x447 #1 softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 #2 Xsoftclock+0x23 exclusive sched_lock &sched_lock r = 0 (0xffffffff82c4d9d0) #0 witness_lock+0x447 #1 schedcpu+0x119 sys/kern/sched_bsd.c:218 #2 timeout_run+0xd0 sys/kern/kern_timeout.c:638 #3 softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 #4 softclock+0x130 sys/kern/kern_timeout.c:708 #5 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #6 Xsoftclock+0x23 shared mutex timeout r = 0 (0xffffffff82c06f80) #0 witness_lock+0x447 #1 timeout_run+0xbb sys/kern/kern_timeout.c:634 #2 softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 #3 softclock+0x130 sys/kern/kern_timeout.c:708 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x23 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10181 6408K 6419K 78643K 11328 0 pcb 13 8K 8K 78643K 13 0 rtable 240 6K 7K 78643K 1093 0 pf 29 8K 8K 78643K 75 0 ifaddr 44 15K 16K 78643K 142 0 ifgroup 50 2K 2K 78643K 142 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 106 0 ioctlops 0 0K 2K 78643K 129 0 iov 0 0K 24K 78643K 837 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 3184 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 168 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1935 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 26 97K 117K 78643K 9868 0 sigio 0 0K 0K 78643K 1116 0 proc 56 78K 103K 78643K 1544 0 subproc 104 6K 6K 78643K 403 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 228 0 in_multi 99 7K 7K 78643K 416 0 ether_multi 1 0K 0K 78643K 6 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 1K 78643K 1636 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 435 91K 96K 78643K 97821 0 UVM aobj 131 4K 4K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 3 0K 0K 78643K 1632 0 NDP 11 0K 2K 78643K 96 0 temp 74 5872K 6000K 78643K 28037 0 kqueue 12 18K 26K 78643K 630 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 120 248 0 245 4 3 1 3 0 8 0 rtentry 112 379 0 266 4 0 4 4 0 8 0 unpcb 144 6849 0 6834 42 41 1 6 0 8 0 syncache 296 55 0 55 14 13 1 1 0 8 1 tcpqe 32 68 0 68 9 9 0 1 0 8 0 tcpcb 808 6615 0 6611 78 76 2 8 0 8 1 arp 120 64 0 46 1 0 1 1 0 8 0 ipq 40 7 0 7 2 2 0 1 0 8 0 ipqe 40 20 0 20 2 2 0 1 0 8 0 inpcb 368 12596 0 12587 86 84 2 14 0 8 1 nd6 136 108 0 81 1 0 1 1 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1526 0 1063 32 3 29 30 0 8 0 art_table 32 1527 0 1063 4 0 4 4 0 8 0 art_node 16 378 0 275 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 19 2 2 0 1 0 8 0 semapl 112 1933 0 1923 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 13900 0 12428 93 0 93 93 0 8 0 ffsino 272 13900 0 12428 99 0 99 99 0 8 0 nchpl 144 26113 0 24473 63 0 63 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 84843 0 84843 4 3 1 2 0 8 1 percpumem 16 66 0 23 1 0 1 1 0 8 0 kstatmem 264 68 0 46 2 0 2 2 0 8 0 scxspl 216 88901 0 88901 40 37 3 8 0 8 3 plimitpl 152 1685 0 1661 16 15 1 2 0 8 0 sigapl 424 10119 0 10064 8 1 7 7 0 8 0 futexpl 64 88266 0 88262 2 1 1 1 0 8 0 knotepl 120 638 0 0 12 1 11 11 0 8 0 kqueuepl 216 1372 0 1364 18 17 1 8 0 8 0 pipepl 320 1826 0 1797 58 55 3 8 0 8 0 fdescpl 496 10101 0 10064 7 2 5 6 0 8 0 filepl 152 59835 0 59594 86 74 12 22 0 8 2 lockfpl 104 1157 0 1155 2 1 1 2 0 8 0 lockfspl 48 429 0 427 1 0 1 1 0 8 0 sessionpl 144 46 0 30 1 0 1 1 0 8 0 pgrppl 48 234 0 218 1 0 1 1 0 8 0 ucredpl 104 10488 0 10470 1 0 1 1 0 8 0 zombiepl 144 10064 0 10064 1 0 1 1 0 8 1 processpl 1072 10119 0 10064 5 1 4 5 0 8 0 procpl 696 27184 0 27106 17 9 8 9 0 8 0 sosppl 168 89 0 89 12 12 0 1 0 8 0 sockpl 488 20167 0 20140 272 266 6 28 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 336 0 0 37 9 28 37 0 8 4 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 859 0 0 35 1 34 34 0 8 0 bufpl 288 19785 0 13467 452 0 452 452 0 8 0 anonpl 24 1119493 0 1108876 204 118 86 113 0 186 0 amapchunkpl 152 307584 0 306715 75 39 36 46 0 158 0 amappl16 200 25416 0 25166 150 135 15 39 0 8 0 amappl15 192 12 0 12 2 2 0 1 0 8 0 amappl14 184 278 0 260 3 1 2 2 0 8 0 amappl13 176 25 0 24 1 0 1 1 0 8 0 amappl12 168 11136 0 11095 2 0 2 2 0 8 0 amappl11 160 47 0 36 1 0 1 1 0 8 0 amappl10 152 64 0 53 1 0 1 1 0 8 0 amappl9 144 326 0 324 2 1 1 2 0 8 0 amappl8 136 767 0 602 6 0 6 6 0 8 0 amappl7 128 133 0 113 1 0 1 1 0 8 0 amappl6 120 502 0 477 2 1 1 2 0 8 0 amappl5 112 447 0 441 1 0 1 1 0 8 0 amappl4 104 1555 0 1508 3 1 2 3 0 8 0 amappl3 96 60307 0 60205 3 0 3 3 0 8 0 amappl2 88 10694 0 10620 4 2 2 3 0 8 0 amappl1 80 44876 0 44347 22 9 13 22 0 8 0 amappl 88 96737 0 96477 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 10101 0 10064 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10101 0 10064 1 0 1 1 0 8 0 vmmpekpl 168 80243 0 80186 4 0 4 4 0 8 0 vmmpepl 168 604010 0 601487 214 98 116 129 0 357 0 vmsppl 464 10100 0 10064 7 2 5 6 0 8 0 rwobjpl 56 158160 0 150724 117 9 108 112 0 8 0 pdppl 4096 20210 0 20128 376 294 82 92 0 8 0 pvpl 32 3103277 0 3086147 436 277 159 348 0 265 0 pmappl 248 10100 0 10064 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1311 0 472 25 0 25 25 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 panic(ffffffff827982c8) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82816ad1,ffffffff8276795e,fb,ffffffff828438c8) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82c0cff0,ffff8000212842f8,4e) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82c4da18) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82c4da18) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82c4da18,0) at softclock_process_tick_timeout+0x1b0 sys/kern/kern_timeout.c:685 softclock(0) at softclock+0x130 sys/kern/kern_timeout.c:708 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x23 end of kernel end trace frame: 0x799c73f86ff0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:148 __mp_lock(ffffffff82d81e78) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d81e78) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82d81e78,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:405 sleep_finish(65,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411 syncer_thread(ffff8000211ac008) at syncer_thread+0x486 sys/kern/vfs_sync.c:233 end trace frame: 0x0, count: 6 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+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:148 __mp_lock(ffffffff82d81e78) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d81e78) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82d81e78,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:405 sleep_finish(65,1) at sleep_finish+0x184 sys/kern/kern_synch.c:411 syncer_thread(ffff8000211ac008) at syncer_thread+0x486 sys/kern/vfs_sync.c:233 end trace frame: 0x0, count: -9