panic: kernel diagnostic assertion "ISSET(p->p_flag, P_SUSPSIG | P_SUSPSINGLE) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sig.c", line 1602 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *482391 22645 -1 0x40009010 0xc080000 0 syz-executor 441236 39268 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bad2d) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8f1c,ffffffff8346128c,642,ffffffff8344329e) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff8000fffe1838,8000000,1) at process_stop+0x3fe cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff8000fffe6fc0) at userret+0x203 sys/kern/kern_sig.c:2207 syscall(ffff8000333a0310) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff8000333a0310) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x163ad84b30, count: 7 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_SUSPSIG | P_SUSPSINGLE) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_sig.c", line 1602 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bad2d) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8f1c,ffffffff8346128c,642,ffffffff8344329e) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff8000fffe1838,8000000,1) at process_stop+0x3fe cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff8000fffe6fc0) at userret+0x203 sys/kern/kern_sig.c:2207 syscall(ffff8000333a0310) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff8000333a0310) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x163ad84b30, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003339fff0 rbx 0xffffffff83999e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff8000fffe6fc0 rax 0xffffffff83998ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1ada5ff2a661ad7a r11 0xbd51997d2ba702dd r12 0xffffffff83999c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff8279a8d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003339ffe0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=482391 pid=22645 tcnt=2 stat=onproc flags process=40009010 proc=c080000 runpri=56, usrpri=54, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffe6d28 scnt=1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffe62c8,0xffff8000fffe6d38 process=0xffff8000fffe1838 user=0xffff80003339b000, vmspace=0xfffff5806c3dc208 estcpu=4, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92156 238183 18350 0 2 0 syz-executor 92156 84203 18350 0 3 0x4000080 fsleep syz-executor 38795 507414 30859 0 2 0 syz-executor 38795 326263 30859 0 2 0x4000000 syz-executor 46927 264333 69848 0 3 0x3000 suspend syz-executor 46927 433271 69848 0 3 0x4081000 fltagain2 syz-executor 75218 486110 54706 -1 2 0x10 syz-executor 75218 87565 54706 -1 3 0x4000090 fsleep syz-executor 75218 36046 54706 -1 3 0x4000090 fsleep syz-executor 75218 100071 54706 -1 3 0x4000090 fsleep syz-executor *22645 482391 64418 -1 7 0x4c089010 syz-executor 22645 212380 64418 -1 3 0x4400b010 suspend syz-executor 23199 293122 0 0 3 0x14280 nfsidl nfsio 98236 380992 0 0 3 0x14280 nfsidl nfsio 52918 292512 0 0 3 0x14280 nfsidl nfsio 91105 341987 0 0 3 0x14280 nfsidl nfsio 81874 140110 0 0 3 0x14280 nfsidl nfsio 88933 367901 0 0 3 0x14280 nfsidl nfsio 49898 198105 0 0 3 0x14280 nfsidl nfsio 26964 159523 0 0 3 0x14280 nfsidl nfsio 77822 191967 0 0 3 0x14280 nfsidl nfsio 75171 229243 0 0 3 0x14280 nfsidl nfsio 40346 277014 0 0 3 0x14280 nfsidl nfsio 58849 317982 0 0 3 0x14280 nfsidl nfsio 41697 281298 0 0 3 0x14280 nfsidl nfsio 5854 256036 0 0 3 0x14280 nfsidl nfsio 69959 1767 0 0 3 0x14280 nfsidl nfsio 45682 478997 0 0 3 0x14280 nfsidl nfsio 65774 273713 0 0 3 0x14280 nfsidl nfsio 6050 227540 0 0 3 0x14280 nfsidl nfsio 20370 142183 0 0 3 0x14280 nfsidl nfsio 97020 20849 0 0 3 0x14280 nfsidl nfsio 18350 163722 2869 0 3 0x82 nanoslp syz-executor 16942 41226 2869 0 2 0x10000c82 syz-executor 64418 100976 2869 0 3 0x82 wait syz-executor 54706 8419 2869 0 2 0xc82 syz-executor 88111 151935 2869 0 3 0x82 wait syz-executor 30859 480693 2869 0 3 0x82 nanoslp syz-executor 69848 518093 2869 0 2 0x2 syz-executor 9235 500398 2869 0 2 0x2 syz-executor 2869 491684 84560 0 3 0x82 kqread syz-executor 84560 191645 79884 0 3 0x10008a sigsusp ksh 79884 490742 81477 0 3 0x98 kqread sshd-session 81477 521387 57150 0 3 0x92 kqread sshd-session 88743 236402 1 0 3 0x100083 ttyin getty 57150 30210 1 0 3 0x88 kqread sshd 63140 423696 86385 74 3 0x1100092 bpf pflogd 86385 277305 1 0 3 0x80 sbwait pflogd 33424 176354 53260 73 3 0x1100090 kqread syslogd 53260 516558 1 0 3 0x100082 sbwait syslogd 3910 183147 1 0 3 0x100080 kqread resolvd 72975 192210 53159 77 3 0x100092 kqread dhcpleased 38066 244755 53159 77 3 0x100092 kqread dhcpleased 53159 368250 1 0 3 0x80 kqread dhcpleased 41662 254147 0 0 3 0x14200 bored smr 15464 314623 0 0 2 0x14200 zerothread 88447 81596 0 0 3 0x14200 aiodoned aiodoned 8783 155752 0 0 3 0x14200 syncer update 20981 304765 0 0 3 0x14200 cleaner cleaner 39268 441236 0 0 7 0x14200 reaper 99605 97148 0 0 3 0x14200 pgdaemon pagedaemon 17605 409769 0 0 3 0x14200 bored viomb 19991 490163 0 0 3 0x40014200 acpi0 acpi0 2394 394572 0 0 3 0x40014200 idle1 7840 187829 0 0 3 0x14200 bored softnet1 88493 272138 0 0 3 0x14200 bored softnet0 24926 217198 0 0 3 0x14200 bored systqmp 21189 274916 0 0 3 0x14200 bored systq 31757 298205 0 0 3 0x14200 tmoslp softclockmp 51254 263274 0 0 3 0x40014200 tmoslp softclock 24313 493036 0 0 3 0x40014200 idle0 1 402183 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83aaa738) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 cursig+0x4ee sys/kern/kern_sig.c:1444 #3 userret+0x203 sys/kern/kern_sig.c:2207 #4 syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] #4 syscall+0x9ce sys/arch/amd64/amd64/trap.c:804 #5 Xsyscall+0x128 exclusive mutex &pr->ps_mtx r = 0 (0xffff8000fffe1950) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 cursig+0x4c2 sys/kern/kern_sig.c:1440 #3 userret+0x203 sys/kern/kern_sig.c:2207 #4 syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] #4 syscall+0x9ce sys/arch/amd64/amd64/trap.c:804 #5 Xsyscall+0x128 Process 9235 (syz-executor) thread 0xffff80002a222010 (500398) exclusive rrwlock inode r = 0 (0xfffff58072bcc7b8) #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:686 #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:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff580728d70b0) #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:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11057 12093K 13131K 166960K 12385 0 pcb 18 13K 14K 166960K 73 0 rtable 230 7K 10K 166960K 372 0 pf 35 17K 24K 166960K 84 0 ifaddr 42 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 59 0 sysctl 3 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1328 84K 84K 166960K 1463 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 216 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 164K 166960K 557 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 46 0 in_multi 95 7K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 387 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 235 175K 185K 166960K 3765 0 UVM aobj 6 2K 2K 166960K 8 0 pinsyscall 41 82K 103K 166960K 1372 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 30 0 temp 35 9110K 9158K 166960K 5877 0 kqueue 13 20K 26K 166960K 43 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 40 0 35 1 0 1 1 0 8 0 rtentry 176 112 0 7 5 0 5 5 0 8 0 unpcb 144 96 0 76 2 0 2 2 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 60 0 56 4 0 4 4 0 8 3 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 196 0 186 7 0 7 7 0 8 6 nd6 152 24 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 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 pfrktable 1344 7 0 7 1 0 1 1 0 8 1 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 11 0 2 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 24 0 0 1 0 1 1 0 8 0 pfstkey 128 26 0 2 1 0 1 1 0 8 0 pfstate 448 25 0 1 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 16 29 0 29 29 0 8 0 art_table 40 453 0 16 5 0 5 5 0 8 0 art_node 32 112 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 13 0 5 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1716 0 247 93 0 93 93 0 8 0 ffsino 296 1716 0 247 114 0 114 114 0 8 0 nchpl 144 2024 0 318 64 0 64 64 0 8 0 vnodes 216 1879 0 0 105 0 105 105 0 8 0 namei 1024 6382 0 6382 2 0 2 2 0 8 2 percpumem 16 53 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1 kstatmem 264 31 0 4 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 7279 0 7279 3 2 1 2 1 8 1 plimitpl 152 76 0 58 1 0 1 1 0 8 0 sigapl 424 553 0 486 8 0 8 8 0 8 0 knotepl 120 310 0 0 10 0 10 10 0 8 0 kqueuepl 224 83 0 73 3 0 3 3 0 8 2 pipepl 344 134 0 107 3 0 3 3 0 8 0 fdescpl 528 517 0 487 3 0 3 3 0 8 0 filepl 160 2273 0 2047 13 0 13 13 0 8 3 lockfpl 104 62 0 58 1 0 1 1 0 8 0 lockfspl 48 30 0 26 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 224 0 209 1 0 1 1 0 8 0 zombiepl 144 489 0 486 1 0 1 1 0 8 0 processpl 1232 553 0 486 6 0 6 6 0 8 0 procpl 664 726 0 651 8 0 8 8 0 8 1 sockpl 752 332 0 297 11 0 11 11 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 259 0 0 17 0 17 17 0 8 0 bufpl 272 2668 0 106 171 0 171 171 0 8 0 anonpl 32 7454 0 0 61 0 61 61 0 246 0 amapchunkpl 152 10690 0 10228 22 0 22 22 0 158 1 amappl16 200 2228 0 2202 15 1 14 15 0 8 10 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 435 0 433 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 768 0 739 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 96 0 94 1 0 1 1 0 8 0 amappl7 128 146 0 133 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 96 0 86 1 0 1 1 0 8 0 amappl4 104 286 0 268 1 0 1 1 0 8 0 amappl3 96 2005 0 1899 4 0 4 4 0 8 0 amappl2 88 540 0 479 2 0 2 2 0 8 0 amappl1 80 10777 0 10172 15 0 15 15 0 8 2 amappl 88 3036 0 2875 5 0 5 5 0 92 0 uvmvnodes 80 105 0 0 3 0 3 3 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 7 0 2 1 0 1 1 0 8 0 uaddrrnd 24 517 0 487 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 517 0 487 1 0 1 1 0 8 0 vmmpekpl 168 6309 0 6277 2 0 2 2 0 8 0 vmmpepl 168 42494 0 40631 95 0 95 95 0 357 8 vmsppl 488 516 0 487 5 0 5 5 0 8 1 rwobjpl 80 15900 0 14874 27 0 27 27 0 8 2 pdppl 4096 1041 0 974 99 28 71 85 0 8 4 pvpl 32 15173 0 0 123 0 123 123 0 265 0 pmappl 256 516 0 487 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 453 0 32 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bad2d) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f8f1c,ffffffff8346128c,642,ffffffff8344329e) at __assert+0x29 sys/kern/subr_prf.c:-1 process_stop(ffff8000fffe1838,8000000,1) at process_stop+0x3fe cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 x86_atomic_setbits_u32 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:-1 [inline] cursig(ffff8000fffe6fc0,ffff8000333a01d8,0) at cursig+0x509 sys/kern/kern_sig.c:1445 userret(ffff8000fffe6fc0) at userret+0x203 sys/kern/kern_sig.c:2207 syscall(ffff8000333a0310) at syscall+0x9ce mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff8000333a0310) at syscall+0x9ce sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x163ad84b30, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 mtx_leave(ffffffff839baaa0) at mtx_leave+0x28 sys/kern/kern_lock.c:-1 msleep_nsec(ffffffff839baad8,ffffffff839baaa0,4,ffffffff834ccf90,ffffffffffffffff) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 8 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 mtx_leave(ffffffff839baaa0) at mtx_leave+0x28 sys/kern/kern_lock.c:-1 msleep_nsec(ffffffff839baad8,ffffffff839baaa0,4,ffffffff834ccf90,ffffffffffffffff) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -7