panic: kernel diagnostic assertion "!ISSET(p->p_flag, P_WSLEEP) || p->p_stat == SSTOP" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sched.c", line 251 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 16150 53219 0 0 0 0K syz-executor.0 171062 64916 0 0 0 1 syz-executor.1 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279b8ff) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281639d,ffffffff8281fee8,fb,ffffffff8283fb6d) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82bb1ff0,ffff80002129fb60,54) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82d38980) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82d38980) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82d38980,0) 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: 0x709c52c47270, 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/multicore/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(ffffffff8279b8ff) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281639d,ffffffff8281fee8,fb,ffffffff8283fb6d) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82bb1ff0,ffff80002129fb60,54) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82d38980) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82d38980) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82d38980,0) 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: 0x709c52c47270, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002af89b40 rbx 0xffffffff82bb2b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff80002129e030 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb907e2ccfcf5a r11 0x5253341cd3d94184 r12 0xffffffff82bb2990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81f20fdc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002af89b30 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=16150 stat=onproc flags process=0 proc=0 pri=82, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff80002129e858,0xffff80002129e5b0 process=0xffff8000212a3258 user=0xffff80002af84000, vmspace=0xfffffd806efce748 estcpu=34, cpticks=0, pctcpu=1.4 user=0, sys=1, intr=103 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *53219 16150 70330 0 7 0 syz-executor.0 53219 275438 70330 0 2 0x4000000 syz-executor.0 64916 171062 92664 0 7 0 syz-executor.1 16022 308156 36856 0 3 0x3800 suspend syz-executor.5 16022 155858 36856 0 2 0x40818a0 syz-executor.5 92577 459139 55288 0 2 0 syz-executor.6 25738 490111 38410 0 2 0 syz-executor.7 25738 443372 38410 0 2 0x4000000 syz-executor.7 90548 441024 91343 0 2 0 syz-executor.2 38410 305595 83423 0 3 0x82 nanoslp syz-executor.7 36856 300494 83423 0 3 0x82 nanoslp syz-executor.5 91343 268461 83423 0 3 0x82 nanoslp syz-executor.2 55288 272866 83423 0 3 0x82 nanoslp syz-executor.6 48686 356722 83423 0 2 0x2 syz-executor.3 21316 142478 83423 0 3 0x82 nanoslp syz-executor.4 92664 409096 83423 0 3 0x82 nanoslp syz-executor.1 70330 328329 83423 0 2 0x2 syz-executor.0 83423 300282 59032 0 3 0x82 wait syz-fuzzer 83423 414288 59032 0 3 0x4000082 nanoslp syz-fuzzer 83423 208072 59032 0 3 0x4000082 wait syz-fuzzer 83423 22858 59032 0 3 0x4000082 wait syz-fuzzer 83423 518163 59032 0 3 0x4000082 wait syz-fuzzer 83423 53852 59032 0 3 0x4000082 wait syz-fuzzer 83423 209658 59032 0 3 0x4000082 wait syz-fuzzer 83423 129639 59032 0 3 0x4000082 thrsleep syz-fuzzer 83423 77940 59032 0 3 0x4000082 thrsleep syz-fuzzer 83423 24816 59032 0 3 0x4000082 thrsleep syz-fuzzer 83423 272708 59032 0 3 0x4000082 wait syz-fuzzer 83423 429562 59032 0 3 0x4000082 thrsleep syz-fuzzer 83423 231686 59032 0 3 0x4000082 thrsleep syz-fuzzer 83423 48638 59032 0 3 0x4000082 wait syz-fuzzer 83423 205159 59032 0 3 0x4000082 kqread syz-fuzzer 83423 318493 59032 0 3 0x4000082 thrsleep syz-fuzzer 59032 129187 69044 0 3 0x10008a sigsusp ksh 69044 4957 12807 0 3 0x9a kqread sshd 52071 154093 1 0 3 0x100083 ttyin getty 12807 435238 1 0 3 0x88 kqread sshd 93934 242918 63406 74 2 0x1100492 pflogd 63406 301242 1 0 3 0x80 netio pflogd 80648 427985 45036 73 3 0x1100090 kqread syslogd 45036 404265 1 0 3 0x100082 netio syslogd 7786 374958 1 0 3 0x100080 kqread resolvd 95278 290259 21342 77 3 0x100092 kqread dhcpleased 58996 484991 21342 77 3 0x100092 kqread dhcpleased 21342 117590 1 0 3 0x80 kqread dhcpleased 87911 65041 0 0 3 0x14200 bored smr 18069 520236 0 0 2 0x14200 zerothread 66866 292971 0 0 3 0x14200 aiodoned aiodoned 45644 256653 0 0 3 0x14200 syncer update 98862 128046 0 0 3 0x14200 cleaner cleaner 90345 524006 0 0 3 0x14200 reaper reaper 73884 307073 0 0 3 0x14200 pgdaemon pagedaemon 18754 343304 0 0 3 0x14200 bored viomb 88946 114586 0 0 3 0x40014200 acpi0 acpi0 86749 113148 0 0 3 0x40014200 idle1 14744 10343 0 0 3 0x14200 bored softnet3 11674 276307 0 0 3 0x14200 bored softnet2 139 144251 0 0 3 0x14200 bored softnet1 25084 216751 0 0 3 0x14200 bored softnet0 13656 3900 0 0 3 0x14200 bored systqmp 58612 387803 0 0 3 0x14200 bored systq 28331 176191 0 0 3 0x40014200 bored softclock 63113 280609 0 0 3 0x40014200 idle0 1 122394 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 (0xffffffff82d38938) #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 (0xffffffff82bbad50) #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 CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806e391ea0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 pmap_enter+0x1c3 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:423 [inline] #3 pmap_enter+0x1c3 sys/arch/amd64/amd64/pmap.c:2710 #4 uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1057 #5 uvm_fault+0x154 sys/uvm/uvm_fault.c:609 #6 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 53219 (syz-executor.0) thread 0xffff80002129e030 (16150) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d3d998) #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 (0xffffffff82d38938) #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 (0xffffffff82bbad50) #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 64916 (syz-executor.1) thread 0xffff80002129e858 (171062) exclusive rwlock amaplk r = 0 (0xfffffd80701e1d70) #0 witness_lock+0x447 #1 uvm_fault_check+0x41a sys/uvm/uvm_fault.c:783 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8069ac5a20) #0 witness_lock+0x447 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1773 #2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10181 6482K 6490K 78643K 12861 0 pcb 13 8K 8K 78643K 15 0 rtable 234 6K 6K 78643K 356 0 pf 32 9K 10K 78643K 43 0 ifaddr 45 15K 15K 78643K 47 0 ifgroup 55 2K 2K 78643K 55 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 1721 0 iov 0 0K 0K 78643K 479 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1283 80K 80K 78643K 1523 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 25K 78643K 1793 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 178 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 77K 78643K 19095 0 proc 67 91K 175K 78643K 4660 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 7K 7K 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 390 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 295 81K 83K 78643K 162607 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 2K 78643K 28 0 temp 73 5864K 5982K 78643K 42698 0 kqueue 12 18K 18K 78643K 22 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 144 7373 0 7358 15 14 1 4 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 162 0 162 1 1 0 1 0 8 0 tcpcb 808 8 0 4 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 164 0 157 1 0 1 1 0 8 0 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 pfstitem 24 28 0 26 1 0 1 1 0 8 0 pfstkey 128 28 0 26 1 0 1 1 0 8 0 pfstate 376 28 0 26 3 2 1 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 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 semapl 112 176 0 166 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 21390 0 19943 91 0 91 91 0 8 0 ffsino 272 21390 0 19943 97 0 97 97 0 8 0 nchpl 144 51693 0 50006 65 1 64 64 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 128097 0 128097 4 3 1 3 0 8 1 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 125376 0 125376 10 8 2 8 0 8 2 plimitpl 152 714 0 697 1 0 1 1 0 8 0 sigapl 424 19419 0 19372 7 1 6 6 0 8 0 futexpl 64 149593 0 149592 1 0 1 1 0 8 0 knotepl 120 106 0 0 4 0 4 4 0 8 0 kqueuepl 216 338 0 330 1 0 1 1 0 8 0 pipepl 320 3720 0 3692 12 9 3 8 0 8 0 fdescpl 496 19402 0 19373 5 1 4 5 0 8 0 filepl 152 60377 0 60137 58 47 11 16 0 8 1 lockfpl 104 839 0 837 1 0 1 1 0 8 0 lockfspl 48 390 0 388 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 7 1 0 1 1 0 8 0 ucredpl 104 941 0 929 1 0 1 1 0 8 0 zombiepl 144 19373 0 19372 1 0 1 1 0 8 0 processpl 1072 19419 0 19372 4 0 4 4 0 8 0 procpl 696 40362 0 40297 8 1 7 8 0 8 0 sockpl 488 7574 0 7549 53 49 4 12 0 8 0 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 35 0 0 4 1 3 3 0 8 0 mcl4k 4096 41 0 0 4 1 3 3 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 290 0 0 32 8 24 32 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 841 0 0 17 0 17 17 0 8 0 bufpl 288 23204 0 16887 452 0 452 452 0 8 0 anonpl 24 1435456 0 1428314 69 22 47 58 0 186 0 amapchunkpl 152 511035 0 510373 99 68 31 32 0 158 3 amappl16 200 22864 0 22706 9 0 9 9 0 8 0 amappl15 192 10 0 10 2 2 0 1 0 8 0 amappl14 184 165 0 150 2 1 1 2 0 8 0 amappl13 176 15 0 15 3 3 0 1 0 8 0 amappl12 168 20073 0 20045 3 1 2 2 0 8 0 amappl11 160 67 0 53 1 0 1 1 0 8 0 amappl10 152 32 0 20 1 0 1 1 0 8 0 amappl9 144 184 0 183 2 1 1 2 0 8 0 amappl8 136 246 0 180 3 0 3 3 0 8 0 amappl7 128 61 0 45 1 0 1 1 0 8 0 amappl6 120 286 0 270 2 1 1 2 0 8 0 amappl5 112 211 0 201 1 0 1 1 0 8 0 amappl4 104 685 0 644 3 1 2 3 0 8 0 amappl3 96 103233 0 103162 4 1 3 3 0 8 0 amappl2 88 20079 0 20018 3 1 2 3 0 8 0 amappl1 80 74497 0 73944 23 10 13 23 0 8 0 amappl 88 162069 0 161886 7 2 5 6 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 19402 0 19373 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 19402 0 19373 1 0 1 1 0 8 0 vmmpekpl 168 106598 0 106543 3 0 3 3 0 8 0 vmmpepl 168 1030686 0 1028665 183 88 95 117 0 357 3 vmsppl 464 19401 0 19373 5 1 4 5 0 8 0 rwobjpl 56 216182 0 208927 111 7 104 104 0 8 0 pdppl 4096 38812 0 38746 932 864 68 76 0 8 2 pvpl 32 4841660 0 4828836 387 270 117 369 0 265 5 pmappl 248 19401 0 19373 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1674 0 879 23 0 23 23 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(ffffffff8279b8ff) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281639d,ffffffff8281fee8,fb,ffffffff8283fb6d) at __assert+0x29 sys/kern/subr_prf.c:157 setrunqueue(ffffffff82bb1ff0,ffff80002129fb60,54) at setrunqueue+0x2e5 sys/kern/kern_sched.c:249 schedcpu(ffffffff82d38980) at schedcpu+0x28b sys/kern/sched_bsd.c:235 timeout_run(ffffffff82d38980) at timeout_run+0xd0 sys/kern/kern_timeout.c:638 softclock_process_tick_timeout(ffffffff82d38980,0) 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: 0x709c52c47270, 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+0x30 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:148 __mp_lock(ffffffff82d38730) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d38730) at __mp_lock+0x133 sys/kern/kern_lock.c:147 preempt() at preempt+0x37 sys/kern/sched_bsd.c:296 ast(ffff80002e3ff1b0) at ast+0x109 mi_ast sys/sys/syscall_mi.h:192 [inline] ast(ffff80002e3ff1b0) at ast+0x109 sys/arch/amd64/amd64/trap.c:541 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7159b6536e10, count: 7 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+0x30 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:148 __mp_lock(ffffffff82d38730) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d38730) at __mp_lock+0x133 sys/kern/kern_lock.c:147 preempt() at preempt+0x37 sys/kern/sched_bsd.c:296 ast(ffff80002e3ff1b0) at ast+0x109 mi_ast sys/sys/syscall_mi.h:192 [inline] ast(ffff80002e3ff1b0) at ast+0x109 sys/arch/amd64/amd64/trap.c:541 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x7159b6536e10, count: -8