uvm_fault(0xfffffd80620f67c8, 0x48, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND 418906 29476 0 0 0 1 syz-executor *518236 29476 0 0 0x4000000 0K syz-executor witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014d5b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtioctl(11e5f,80044403,ffff80003c42f670,81,ffff80003c448028) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd8062992298,80044403,ffff80003c42f670,81,fffffd80097fb618,ffff80003c448028) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80623a30a8,80044403,ffff80003c42f670,ffff80003c448028) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c448028,ffff80003c42f850,ffff80003c42f7a0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c42f850) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42f850) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd836d53a0, 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: uvm_fault(0xfffffd80620f67c8, 0x48, 0, 1) -> e ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014d5b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtioctl(11e5f,80044403,ffff80003c42f670,81,ffff80003c448028) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd8062992298,80044403,ffff80003c42f670,81,fffffd80097fb618,ffff80003c448028) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80623a30a8,80044403,ffff80003c42f670,ffff80003c448028) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c448028,ffff80003c42f850,ffff80003c42f7a0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c42f850) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42f850) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd836d53a0, count: -10 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c42f340 rbx 0 rdx 0 rcx 0xffff80003c448028 rax 0xffffffff83805ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003c448028 r9 0xffff80003c448028 r10 0x33811e2420a4d19a r11 0x69417e9a9f591d2d r12 0 r13 0x1 r14 0x28 r15 0x3 rip 0xffffffff810c6c79 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c42f290 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (syz-executor) tid=518236 pid=29476 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4499c8,0xffffffff8395c980 process=0xffff800037c149e0 user=0xffff80003c42a000, vmspace=0xfffffd80620f67c8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29476 418906 5000 0 7 0 syz-executor 29476 95362 5000 0 2 0x4000000 syz-executor 29476 87554 5000 0 2 0x4000080 syz-executor *29476 518236 5000 0 7 0x4000000 syz-executor 71716 288229 78711 0 2 0 syz-executor 71716 489284 78711 0 3 0x4000080 fsleep syz-executor 53367 432294 39080 0 2 0 syz-executor 53367 39216 39080 0 3 0x4000080 fsleep syz-executor 37155 24835 96681 -1 2 0x10 syz-executor 37155 362118 96681 -1 3 0x4000090 sysctllk syz-executor 37155 245742 96681 -1 3 0x4000090 fsleep syz-executor 40737 402801 33283 0 2 0 syz-executor 40737 368783 33283 0 3 0x4000080 sysctllk syz-executor 40737 124409 33283 0 2 0x4000000 syz-executor 136 373270 80765 0 3 0x80 nanoslp syz-executor 136 255963 80765 0 3 0x4000080 sysctllk syz-executor 12035 45073 62573 0 3 0x3000 suspend syz-executor 12035 135563 62573 0 2 0x4081000 syz-executor 12035 450442 62573 0 3 0x4081000 fltagain2 syz-executor 80765 347798 20292 0 3 0x82 nanoslp syz-executor 14023 183486 0 0 3 0x14200 acct acct 10020 58658 0 0 3 0x14200 bored sosplice 62573 509274 20292 0 3 0x82 nanoslp syz-executor 39080 392672 20292 0 3 0x82 nanoslp syz-executor 96681 249708 20292 0 3 0x82 nanoslp syz-executor 57309 26086 20292 0 3 0x82 wait syz-executor 78711 376017 20292 0 3 0x82 nanoslp syz-executor 33283 236523 20292 0 3 0x82 nanoslp syz-executor 5000 288183 20292 0 3 0x82 nanoslp syz-executor 20292 402086 28206 0 3 0x82 kqread syz-executor 28206 162959 92677 0 3 0x10008a sigsusp ksh 92677 521075 81954 0 3 0x98 kqread sshd-session 81954 426167 51998 0 3 0x92 kqread sshd-session 73109 496529 1 0 3 0x100083 ttyin getty 51998 401624 1 0 3 0x88 kqread sshd 54250 473735 74767 74 3 0x1100092 bpf pflogd 74767 313758 1 0 3 0x80 sbwait pflogd 38308 46124 65838 73 3 0x1100090 kqread syslogd 65838 440004 1 0 3 0x100082 sbwait syslogd 97701 11085 1 0 3 0x100080 kqread resolvd 55289 217963 98200 77 3 0x100092 sysctllk dhcpleased 67282 347011 98200 77 3 0x100092 kqread dhcpleased 98200 171203 1 0 3 0x80 kqread dhcpleased 19957 184428 0 0 3 0x14200 bored smr 9660 298470 0 0 2 0x14200 zerothread 73378 460185 0 0 3 0x14200 aiodoned aiodoned 1374 124373 0 0 3 0x14200 syncer update 20913 123080 0 0 3 0x14200 cleaner cleaner 17177 57017 0 0 3 0x14200 reaper reaper 6002 501253 0 0 3 0x14200 pgdaemon pagedaemon 33360 441002 0 0 3 0x14200 bored viomb 94286 235653 0 0 3 0x40014200 acpi0 acpi0 12442 119977 0 0 3 0x40014200 idle1 30162 369025 0 0 3 0x14200 bored softnet7 60448 442659 0 0 3 0x14200 bored softnet6 26781 198067 0 0 3 0x14200 bored softnet5 78542 63864 0 0 3 0x14200 bored softnet4 86645 52925 0 0 3 0x14200 bored softnet3 45396 516367 0 0 3 0x14200 bored softnet2 76586 37983 0 0 3 0x14200 bored softnet1 6940 169197 0 0 3 0x14200 bored softnet0 24200 259242 0 0 3 0x14200 bored systqmp 50252 198732 0 0 3 0x14200 bored systq 89106 189656 0 0 3 0x14200 tmoslp softclockmp 93308 196764 0 0 3 0x40014200 tmoslp softclock 84979 71689 0 0 3 0x40014200 idle0 1 422495 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 29476 (syz-executor) thread 0xffff80003c448028 (518236) exclusive rwlock dtlk r = 0 (0xffffffff8380edd8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:318 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a26670) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 Process 12035 (syz-executor) thread 0xffff8000ffff27c0 (135563) exclusive rrwlock inode r = 0 (0xfffffd806b8a58f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 12035 (syz-executor) thread 0xffff800030ff99c0 (450442) exclusive rwlock sysctllk r = 0 (0xffffffff837df808) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:191 #3 kern_sysctl+0xc9a sys/kern/kern_sysctl.c:712 #4 sys_sysctl+0x3f2 sys/kern/kern_sysctl.c:-1 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 11070K 11435K 166960K 12300 0 pcb 19 16K 17K 166960K 227 0 rtable 206 10K 11K 166960K 366 0 pf 41 19K 22K 166960K 110 0 ifaddr 40 6K 8K 166960K 70 0 ifgroup 55 2K 2K 166960K 104 0 sysctl 4 1K 9K 166960K 14 0 counters 68 36K 37K 166960K 124 0 ioctlops 0 0K 4K 166960K 1697 0 iov 0 0K 24K 166960K 59 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 2030 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 102 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 793 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 196K 166960K 646 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 103 0 in_multi 89 6K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 3 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 578 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 257 164K 170K 166960K 8900 0 UVM aobj 81 3K 3K 166960K 81 0 pinsyscall 43 86K 105K 166960K 1907 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 33 0 NDP 12 0K 2K 166960K 48 0 temp 56 8679K 8928K 166960K 32983 0 kqueue 13 20K 30K 166960K 132 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 82 0 79 1 0 1 1 0 8 0 rtentry 176 118 0 37 5 0 5 5 0 8 0 unpcb 144 749 0 731 11 5 6 6 0 8 5 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpcb 736 184 0 179 4 0 4 4 0 8 3 arp 128 12 0 3 1 0 1 1 0 8 0 inpcb 328 805 0 793 13 6 7 7 0 8 5 nd6 144 23 0 4 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 24 0 24 2 1 1 1 0 8 1 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 3 0 1 2 1 1 1 0 482 0 pffrnode 88 3 0 1 2 1 1 1 0 8 0 pffrent 40 5 0 3 2 1 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 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 56 0 17 1 0 1 1 0 8 0 pfstkey 128 60 0 21 2 0 2 2 0 8 0 pfstate 384 58 0 19 5 0 5 5 0 8 0 pfrule 1344 28 0 21 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 553 0 160 29 3 26 29 0 8 0 art_table 40 556 0 160 5 0 5 5 0 8 0 art_node 32 117 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 4 1 0 1 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 78 0 0 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 2838 0 1331 95 0 95 95 0 8 0 ffsino 296 2838 0 1331 117 0 117 117 0 8 0 nchpl 144 3955 0 2258 64 0 64 64 0 8 0 rtmask 32 4 0 4 3 2 1 1 0 8 1 uvmvnodes 80 3322 0 0 68 0 68 68 0 8 0 vnodes 216 3322 0 0 185 0 185 185 0 8 0 namei 1024 13096 0 13096 3 2 1 2 0 8 1 percpumem 16 77 0 28 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 62 0 36 3 1 2 3 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 24688 0 24688 11 10 1 8 1 8 1 plimitpl 152 120 0 101 1 0 1 1 0 8 0 sigapl 424 1099 0 1043 7 0 7 7 0 8 0 knotepl 120 527 0 0 16 0 16 16 0 8 0 kqueuepl 224 360 0 350 6 4 2 5 0 8 1 pipepl 344 238 0 211 3 0 3 3 0 8 0 fdescpl 528 1073 0 1041 3 0 3 3 0 8 0 filepl 160 6513 0 6291 21 6 15 18 0 8 2 lockfpl 104 370 0 368 1 0 1 1 0 8 0 lockfspl 48 155 0 153 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 892 0 878 1 0 1 1 0 8 0 zombiepl 144 1045 0 1043 1 0 1 1 0 8 0 processpl 1248 1099 0 1043 5 0 5 5 0 8 0 procpl 656 2266 0 2198 7 0 7 7 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 752 1659 0 1626 30 14 16 17 0 8 12 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 44 0 0 2 0 2 2 0 8 0 mbufpl 256 213 0 0 13 0 13 13 0 8 0 bufpl 280 10165 0 4023 439 0 439 439 0 8 0 anonpl 32 10414 0 0 84 0 84 84 0 246 0 amapchunkpl 152 29431 0 28834 37 11 26 30 0 158 3 amappl16 200 4167 0 4132 24 8 16 21 0 8 5 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 122 0 110 1 0 1 1 0 8 0 amappl13 176 92 0 91 1 0 1 1 0 8 0 amappl12 168 1745 0 1713 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 10 0 9 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 38 0 35 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 128 0 117 1 0 1 1 0 8 0 amappl4 104 306 0 285 1 0 1 1 0 8 0 amappl3 96 5711 0 5587 5 1 4 4 0 8 0 amappl2 88 660 0 595 2 0 2 2 0 8 0 amappl1 80 11343 0 10732 16 1 15 15 0 8 0 amappl 88 8088 0 7904 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 80 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1073 0 1041 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1073 0 1041 1 0 1 1 0 8 0 vmmpekpl 168 10264 0 10222 3 0 3 3 0 8 0 vmmpepl 168 74147 0 72052 107 4 103 106 0 357 7 vmsppl 488 1072 0 1041 6 1 5 5 0 8 0 rwobjpl 80 25474 0 21101 93 0 93 93 0 8 0 pdppl 4096 2154 0 2082 102 28 74 86 0 8 2 pvpl 32 21113 0 0 172 1 171 171 0 265 0 pmappl 256 1072 0 1041 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 39 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260 clockintr_unbind(ffff8000014d5b30,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375 dt_ioctl_record_stop(ffff800000afb000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576 dtioctl(11e5f,80044403,ffff80003c42f670,81,ffff80003c448028) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd8062992298,80044403,ffff80003c42f670,81,fffffd80097fb618,ffff80003c448028) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80623a30a8,80044403,ffff80003c42f670,ffff80003c448028) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80003c448028,ffff80003c42f850,ffff80003c42f7a0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c42f850) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c42f850) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd836d53a0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 syscall(ffff80003a823eb0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a823eb0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a616faf5d0, count: 9 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 syscall(ffff80003a823eb0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a823eb0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70a616faf5d0, count: -6