panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 137017 81419 32767 0x1010 0x2000 1 syz-executor.4 *423829 81997 32767 0x10 0x4000000 0 syz-executor.6 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825c54ea) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82a6d2a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002477a7c8,fffffd807c2dd098,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd807c2dd010) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd80795e65c0,29,2c,fffffd8062ed7400) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000fffed500,ffff80002477a9b8,ffff80002477aa00) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002477aa80) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002477aa80) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e0ebab8770, count: 4 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: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825c54ea) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82a6d2a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002477a7c8,fffffd807c2dd098,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd807c2dd010) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd80795e65c0,29,2c,fffffd8062ed7400) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000fffed500,ffff80002477a9b8,ffff80002477aa00) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002477aa80) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002477aa80) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e0ebab8770, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002477a4f0 rbx 0xffffffff82933b8f cpu_info_full_primary+0x2b8f rdx 0xffff800000be7780 rcx 0 rax 0xffff8000fffed500 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb36dbb8947ee2667 r11 0xb8f271beeb857d1b r12 0xffffffff82933990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81276708 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002477a4e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.6) pid=423829 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800021282d28,0xffff8000fffeca90 process=0xffff8000fffea1a0 user=0xffff800024775000, vmspace=0xfffffd806ca84180 estcpu=31, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93133 422321 29538 32767 2 0x10 syz-executor.2 93133 381531 29538 32767 3 0x4000090 fsleep syz-executor.2 81419 137017 47375 32767 7 0x3010 syz-executor.4 42574 157899 10238 32767 3 0x90 nanoslp syz-executor.3 42574 160901 10238 32767 3 0x4000090 fsleep syz-executor.3 89571 521330 92338 32767 2 0x10 syz-executor.1 89571 475974 92338 32767 3 0x4000090 fsleep syz-executor.1 63091 424881 16240 32767 3 0x90 nanoslp syz-executor.5 63091 71128 16240 32767 3 0x4000090 netio syz-executor.5 63091 433148 16240 32767 3 0x4000090 fsleep syz-executor.5 81997 252739 85500 32767 2 0x10 syz-executor.6 *81997 423829 85500 32767 7 0x4000010 syz-executor.6 85500 339555 91423 32767 3 0x90 nanoslp syz-executor.6 91423 513307 95204 0 3 0x82 wait syz-executor.6 92338 191924 76097 32767 3 0x90 nanoslp syz-executor.1 76097 394295 95204 0 3 0x82 wait syz-executor.1 10238 352913 85993 32767 3 0x90 nanoslp syz-executor.3 85993 49065 95204 0 3 0x82 wait syz-executor.3 83073 117403 64389 32767 3 0x90 nanoslp syz-executor.7 64389 6794 95204 0 3 0x82 wait syz-executor.7 29538 483829 82951 32767 3 0x90 nanoslp syz-executor.2 82951 219032 95204 0 3 0x82 wait syz-executor.2 86379 156805 0 0 3 0x14200 bored sosplice 16240 135931 92550 32767 2 0x10 syz-executor.5 47375 390039 35069 32767 3 0x90 nanoslp syz-executor.4 92550 511023 95204 0 3 0x82 wait syz-executor.5 35069 437964 95204 0 3 0x82 wait syz-executor.4 10541 241611 54832 32767 3 0x90 nanoslp syz-executor.0 54832 199201 95204 0 3 0x82 wait syz-executor.0 95204 27156 69055 0 3 0x82 wait syz-fuzzer 95204 488883 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 244977 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 59976 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 81330 69055 0 3 0x4000082 wait syz-fuzzer 95204 502967 69055 0 3 0x4000082 wait syz-fuzzer 95204 225236 69055 0 3 0x4000082 wait syz-fuzzer 95204 263067 69055 0 3 0x4000082 wait syz-fuzzer 95204 452570 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 482517 69055 0 3 0x4000082 wait syz-fuzzer 95204 433940 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 91060 69055 0 3 0x4000082 wait syz-fuzzer 95204 355344 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 44335 69055 0 3 0x4000082 thrsleep syz-fuzzer 95204 29937 69055 0 3 0x4000082 wait syz-fuzzer 95204 88815 69055 0 3 0x4000082 kqread syz-fuzzer 69055 240280 53103 0 3 0x10008a sigsusp ksh 53103 341798 59136 0 3 0x9a kqread sshd 6668 212021 1 0 3 0x100083 ttyin getty 59136 342148 1 0 3 0x88 kqread sshd 61555 14603 46426 73 3 0x1100090 kqread syslogd 46426 482539 1 0 3 0x100082 netio syslogd 87770 458291 1 0 3 0x100080 kqread resolvd 98180 153081 37203 77 3 0x100092 kqread dhcpleased 11430 376822 37203 77 3 0x100092 kqread dhcpleased 37203 113418 1 0 3 0x80 kqread dhcpleased 33693 152816 0 0 3 0x14200 bored smr 75553 452900 0 0 2 0x14200 zerothread 67052 467423 0 0 3 0x14200 aiodoned aiodoned 41651 508457 0 0 3 0x14200 syncer update 93349 114174 0 0 3 0x14200 cleaner cleaner 9719 164607 0 0 2 0x14200 reaper 15648 498976 0 0 3 0x14200 pgdaemon pagedaemon 52634 388628 0 0 3 0x14200 bored viomb 9297 243694 0 0 3 0x40014200 acpi0 acpi0 93840 449195 0 0 3 0x40014200 idle1 29034 140648 0 0 3 0x14200 bored softnet 14113 300705 0 0 3 0x14200 bored softnet 59202 324884 0 0 3 0x14200 bored softnet 11824 440716 0 0 3 0x14200 bored softnet 54694 14894 0 0 3 0x14200 bored systqmp 30041 386794 0 0 3 0x14200 bored systq 86468 156453 0 0 3 0x40014200 bored softclock 3997 369364 0 0 3 0x40014200 idle0 1 456366 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &inp->inp_mtx r = 0 (0xfffffd807c2dd0d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #4 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #5 Xsyscall+0x128 Process 81419 (syz-executor.4) thread 0xffff8000fffefa50 (137017) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a6d2a0) #0 witness_lock+0x44d #1 uvm_fault+0x181 sys/uvm/uvm_fault.c:623 #2 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #3 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #4 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd80685fc7f0) #0 witness_lock+0x44d #1 uvmfault_lookup+0xc9 sys/uvm/uvm_fault.c:1773 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:417 #6 recall_trap+0x8 Process 81997 (syz-executor.6) thread 0xffff8000fffed500 (423829) shared rwlock netlock r = 0 (0xffffffff82983a40) #0 witness_lock+0x44d #1 solock_shared+0x64 pru_lock sys/sys/protosw.h:287 [inline] #1 solock_shared+0x64 sys/kern/uipc_socket2.c:371 #2 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #3 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #4 Xsyscall+0x128 exclusive mutex &inp->inp_mtx r = 0 (0xfffffd807c2dd0d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 sys_getsockopt+0x145 sys/kern/uipc_syscalls.c:1275 #4 syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 6411K 6420K 78643K 11337 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 4822 0 ifaddr 71 16K 16K 78643K 147 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 84 0 ioctlops 0 0K 2K 78643K 239 0 iov 0 0K 28K 78643K 3269 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1272 80K 80K 78643K 2351 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 87 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1609 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 4630 0 sigio 0 0K 0K 78643K 176 0 proc 56 78K 115K 78643K 1231 0 subproc 104 6K 6K 78643K 260 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 330 0 in_multi 99 6K 6K 78643K 303 0 ether_multi 1 0K 0K 78643K 14 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 169 758K 758K 78643K 169 0 exec 0 0K 1K 78643K 928 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 381 94K 104K 78643K 34535 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 156 0 NDP 11 0K 2K 78643K 63 0 temp 124 4694K 4813K 78643K 15561 0 kqueue 12 18K 28K 78643K 416 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 4550 0 4544 20 17 3 6 0 8 2 rtentry 112 249 0 136 4 0 4 4 0 8 0 unpcb 144 6145 0 6127 42 36 6 6 0 8 5 syncache 296 36 0 36 10 10 0 1 0 8 0 tcpqe 32 117 0 117 9 9 0 1 0 8 0 tcpcb 776 2574 0 2563 79 71 8 14 0 8 6 arp 120 43 0 24 1 0 1 1 0 8 0 ipq 40 8 0 7 3 2 1 1 0 8 0 ipqe 40 156 0 155 3 2 1 1 0 8 0 inpcb 368 4700 0 4676 66 58 8 14 0 8 5 nd6 48 65 0 39 1 0 1 1 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 996 0 537 29 0 29 29 0 8 0 art_table 32 997 0 537 4 0 4 4 0 8 0 art_node 16 248 0 145 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 1607 0 1597 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7649 0 6197 92 0 92 92 0 8 0 ffsino 272 7649 0 6197 98 0 98 98 0 8 0 nchpl 144 14098 0 12463 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 52128 0 52128 3 2 1 2 0 8 1 percpumem 16 54 0 12 1 0 1 1 0 8 0 kstatmem 264 46 0 24 2 0 2 2 0 8 0 scxspl 216 40743 0 40743 15 14 1 8 0 8 1 plimitpl 152 1185 0 1162 10 9 1 2 0 8 0 sigapl 424 4886 0 4831 7 0 7 7 0 8 0 futexpl 64 42449 0 42445 1 0 1 1 0 8 0 knotepl 120 382 0 0 10 0 10 10 0 8 0 kqueuepl 216 1774 0 1766 36 31 5 12 0 8 4 pipepl 320 1204 0 1176 33 30 3 9 0 8 0 fdescpl 496 4868 0 4833 7 2 5 6 0 8 0 filepl 152 43336 0 43089 55 40 15 19 0 8 5 lockfpl 104 1074 0 1072 2 1 1 2 0 8 0 lockfspl 48 212 0 210 1 0 1 1 0 8 0 sessionpl 144 35 0 19 1 0 1 1 0 8 0 pgrppl 48 136 0 120 1 0 1 1 0 8 0 ucredpl 104 5970 0 5952 1 0 1 1 0 8 0 zombiepl 144 4834 0 4831 1 0 1 1 0 8 0 processpl 1072 4886 0 4831 5 0 5 5 0 8 0 procpl 672 13910 0 13833 12 4 8 9 0 8 1 sosppl 168 46 0 45 6 5 1 1 0 8 0 sockpl 488 15621 0 15579 259 245 14 29 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 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 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 4 0 4 4 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 279 0 0 34 2 32 34 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 2496 0 0 148 0 148 148 0 8 0 bufpl 288 11249 0 4921 453 0 453 453 0 8 0 anonpl 24 1069687 0 1055689 172 63 109 122 0 186 0 amapchunkpl 152 107414 0 106646 73 39 34 44 0 158 0 amappl16 200 13468 0 13120 88 69 19 34 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 203 0 189 2 0 2 2 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 534 0 530 1 0 1 1 0 8 0 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 54 0 41 1 0 1 1 0 8 0 amappl9 144 977 0 976 2 1 1 1 0 8 0 amappl8 136 374 0 284 4 0 4 4 0 8 0 amappl7 128 195 0 167 2 0 2 2 0 8 0 amappl6 120 267 0 252 2 1 1 2 0 8 0 amappl5 112 236 0 230 1 0 1 1 0 8 0 amappl4 104 759 0 727 2 1 1 2 0 8 0 amappl3 96 14514 0 14454 2 0 2 2 0 8 0 amappl2 88 5601 0 5522 3 1 2 3 0 8 0 amappl1 80 114343 0 113519 28 9 19 22 0 8 1 amappl 88 33632 0 33406 7 0 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 4868 0 4833 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4868 0 4833 1 0 1 1 0 8 0 vmmpekpl 168 43588 0 43533 3 0 3 3 0 8 0 vmmpepl 168 467103 0 464123 190 51 139 148 0 357 1 vmsppl 368 4867 0 4833 4 0 4 4 0 8 0 rwobjpl 56 133021 0 125403 116 5 111 112 0 8 0 pdppl 4096 9743 0 9666 237 156 81 95 0 8 4 pvpl 32 2041725 0 2021206 338 143 195 269 0 265 5 pmappl 248 4867 0 4833 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1184 0 220 28 0 28 28 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(ffffffff825c54ea) at panic+0x177 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82a6d2a0,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 rt_clone(ffff80002477a7c8,fffffd807c2dd098,0) at rt_clone+0x5c sys/net/route.c:257 rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc rt_match sys/net/route.c:235 [inline] rtalloc_mpath(fffffd807c2dd098,fffffd807c2dd060,0) at rtalloc_mpath+0xbc sys/net/route.c:350 in_pcbrtentry(fffffd807c2dd010) at in_pcbrtentry+0x1cf ip6_ctloutput(0,fffffd80795e65c0,29,2c,fffffd8062ed7400) at ip6_ctloutput+0x1079 sys/netinet6/ip6_output.c:1511 sys_getsockopt(ffff8000fffed500,ffff80002477a9b8,ffff80002477aa00) at sys_getsockopt+0x15e sys/kern/uipc_syscalls.c:1275 syscall(ffff80002477aa80) at syscall+0x4c2 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002477aa80) at syscall+0x4c2 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2e0ebab8770, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a6d098) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82a6d098,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff80002e4e0d18,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 single_thread_set(ffff8000fffefa50,2,1) at single_thread_set+0x386 single_thread_wait sys/kern/kern_sig.c:2170 [inline] single_thread_set(ffff8000fffefa50,2,1) at single_thread_set+0x386 sys/kern/kern_sig.c:2150 exit1(ffff8000fffefa50,0,0,1) at exit1+0xa0 sys_exit(ffff8000fffefa50,ffff80002e4e0e40,ffff80002e4e0e90) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002e4e0f10) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4e0f10) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffea370, count: 2 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff82a6d098) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a6d098) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82a6d098,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff80002e4e0d18,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 single_thread_set(ffff8000fffefa50,2,1) at single_thread_set+0x386 single_thread_wait sys/kern/kern_sig.c:2170 [inline] single_thread_set(ffff8000fffefa50,2,1) at single_thread_set+0x386 sys/kern/kern_sig.c:2150 exit1(ffff8000fffefa50,0,0,1) at exit1+0xa0 sys_exit(ffff8000fffefa50,ffff80002e4e0e40,ffff80002e4e0e90) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002e4e0f10) at syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4e0f10) at syscall+0x438 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffea370, count: -13