panic: pool_do_get: shmpl free list modified: page 0xfffffd8064ec6000; item addr 0xfffffd8064ec6e10; offset 0x40=0x69f3e37b Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 501652 34521 32767 0x10 0 1 syz-executor *513043 34521 32767 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83445d60) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839a15c8,1,ffff80003c44cdc8) at pool_do_get+0x5df pool_get(ffffffff839a15c8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c3e3780,ffff80003c44d020,0,ffff80003c44cf70) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c3e3780,ffff80003c44d020,ffff80003c44cf70) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003c44d020) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44d020) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd0aba89830, 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: pool_do_get: shmpl free list modified: page 0xfffffd8064ec6000; item addr 0xfffffd8064ec6e10; offset 0x40=0x69f3e37b ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83445d60) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839a15c8,1,ffff80003c44cdc8) at pool_do_get+0x5df pool_get(ffffffff839a15c8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c3e3780,ffff80003c44d020,0,ffff80003c44cf70) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c3e3780,ffff80003c44d020,ffff80003c44cf70) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003c44d020) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44d020) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd0aba89830, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c44cbf0 rbx 0xffffffff8389ce07 cpu_info_full_primary+0x2e07 rdx 0xffff8000015a69c0 rcx 0xffff80003c3e3780 rax 0xffffffff8389bff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc80bf3f1fbb02b2b r11 0xac8cc9bc2d4821ea r12 0xffffffff8389cc08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff8258e665 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c44cbe0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=513043 pid=34521 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3c8fb0,0xffffffff83a2cf28 process=0xffff80003c3e6b70 user=0xffff80003c448000, vmspace=0xfffffd806c6f55e8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34521 501652 41975 32767 7 0x10 syz-executor *34521 513043 41975 32767 7 0x4000010 syz-executor 40561 431579 47915 32767 3 0x90 nanoslp syz-executor 40561 163404 47915 32767 3 0x4000090 ttyout syz-executor 40561 412083 47915 32767 3 0x4000090 fsleep syz-executor 40561 75641 47915 32767 3 0x4000090 fsleep syz-executor 44514 173176 34650 32767 3 0x91 nanoslp syz-executor 44514 43526 34650 32767 3 0x4000091 lockf syz-executor 44514 516907 34650 32767 3 0x4000091 fsleep syz-executor 63248 316310 90293 32767 3 0x90 nanoslp syz-executor 63248 335115 90293 32767 3 0x4000090 lockf syz-executor 63248 17102 90293 32767 3 0x4000090 fsleep syz-executor 63248 495484 90293 32767 3 0x4000090 fsleep syz-executor 79453 240556 13138 32767 3 0x90 nanoslp syz-executor 79453 458478 13138 32767 3 0x4000090 kqsel syz-executor 79453 19987 13138 32767 3 0x4000090 fsleep syz-executor 25910 255242 48675 32767 3 0x90 nanoslp syz-executor 25910 11793 48675 32767 3 0x4000090 ttyout syz-executor 25910 139946 48675 32767 3 0x4000090 fsleep syz-executor 4803 134483 21518 32767 3 0x90 nanoslp syz-executor 4803 217300 21518 32767 3 0x4000090 piperd syz-executor 4803 479638 21518 32767 3 0x4000090 fsleep syz-executor 34650 253859 57922 32767 3 0x90 nanoslp syz-executor 21518 234950 8941 32767 3 0x90 nanoslp syz-executor 10367 233741 94042 32767 3 0x10 biowait syz-executor 48675 197253 60430 32767 3 0x90 nanoslp syz-executor 90293 404348 44458 32767 3 0x90 nanoslp syz-executor 47915 371756 18762 32767 3 0x90 nanoslp syz-executor 13138 497398 41563 32767 3 0x90 nanoslp syz-executor 41975 149609 7905 32767 3 0x90 nanoslp syz-executor 8941 463025 20790 0 3 0x82 wait syz-executor 18762 338737 20790 0 3 0x82 wait syz-executor 41563 376570 20790 0 3 0x82 wait syz-executor 94042 319113 20790 0 3 0x82 wait syz-executor 7905 490071 20790 0 3 0x82 wait syz-executor 60430 129332 20790 0 3 0x82 wait syz-executor 44458 460499 20790 0 3 0x82 wait syz-executor 57922 76008 20790 0 3 0x82 wait syz-executor 20790 8733 4414 0 3 0x82 kqread syz-executor 4414 63386 39099 0 3 0x10008a sigsusp ksh 39099 423299 12386 0 3 0x98 kqread sshd-session 12386 31407 88164 0 3 0x92 kqread sshd-session 53098 418478 1 0 3 0x100083 ttyin getty 88164 194479 1 0 3 0x88 kqread sshd 39310 8508 9648 73 3 0x1100090 kqread syslogd 9648 418618 1 0 3 0x100082 sbwait syslogd 44376 373203 1 0 3 0x100080 kqread resolvd 25362 300164 66755 77 3 0x100092 kqread dhcpleased 23244 69547 66755 77 3 0x100092 kqread dhcpleased 66755 248680 1 0 3 0x80 kqread dhcpleased 23590 192603 0 0 3 0x14200 bored smr 91834 145263 0 0 3 0x14200 pgzero zerothread 85576 164703 0 0 3 0x14200 aiodoned aiodoned 88969 305903 0 0 3 0x14200 syncer update 68751 457061 0 0 3 0x14200 cleaner cleaner 97302 84445 0 0 3 0x14200 reaper reaper 25952 361628 0 0 3 0x14200 pgdaemon pagedaemon 67740 64987 0 0 3 0x14200 bored viomb 82737 68352 0 0 3 0x40014200 acpi0 acpi0 89344 220674 0 0 3 0x40014200 idle1 7897 382208 0 0 3 0x14200 bored softnet1 64084 296010 0 0 3 0x14200 bored softnet0 30740 121063 0 0 3 0x14200 bored systqmp 478 373411 0 0 3 0x14200 bored systq 75576 282881 0 0 3 0x14200 tmoslp softclockmp 12741 142345 0 0 3 0x40014200 tmoslp softclock 81748 38027 0 0 3 0x40014200 idle0 1 259022 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex shmpl r = 0 (0xffffffff839a15e0) #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 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 34521 (syz-executor) thread 0xffff80003c3e3780 (513043) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8397a7c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff839a15e0) #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 pool_get+0x124 sys/kern/subr_pool.c:585 #3 shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 #4 sys_shmget+0x195 sys/kern/sysv_shm.c:484 #5 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 10367 (syz-executor) thread 0xffff8000fffef4d8 (233741) exclusive rrwlock inode r = 0 (0xfffffd806c4b2d78) #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+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #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 (0xfffffd806c4b2c50) #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 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12019K 12034K 166960K 12147 0 pcb 17 12K 12K 166960K 17 0 rtable 241 6K 7K 166960K 357 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 36 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1355 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 7 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 214 0 sigio 0 0K 0K 166960K 2 0 proc 58 99K 147K 166960K 505 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 2 0K 0K 166960K 20 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 359 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 266 160K 196K 166960K 3586 0 UVM aobj 73 5K 5K 166960K 74 0 pinsyscall 46 92K 114K 166960K 1288 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 2 0 NDP 13 0K 1K 166960K 27 0 temp 38 9074K 9138K 166960K 4124 0 kqueue 19 28K 28K 166960K 35 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 37 1 0 1 1 0 8 0 rtentry 176 113 0 1 6 0 6 6 0 8 0 unpcb 144 75 0 56 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 41 0 33 2 0 2 2 0 8 1 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 126 0 112 2 0 2 2 0 8 0 nd6 152 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 457 0 0 29 0 29 29 0 8 0 art_table 40 458 0 0 5 0 5 5 0 8 0 art_node 32 113 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 6 0 1 1 0 1 1 0 8 0 shmpl 112 71 0 1 3 0 3 3 0 8 1 pool(0xffffffff839a15c8:shmpl): page inconsistency: page 0xfffffd8064ec6000; 34 on list, 0 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1645 0 181 92 0 92 92 0 8 0 ffsino 296 1645 0 181 113 0 113 113 0 8 0 nchpl 144 1943 0 248 63 0 63 63 0 8 0 vnodes 216 1726 0 0 96 0 96 96 0 8 0 namei 1024 6263 0 6263 1 0 1 1 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 25 0 0 2 0 2 2 0 8 0 scxspl 216 6395 0 6394 4 1 3 3 1 8 2 plimitpl 152 52 0 27 2 0 2 2 0 8 1 sigapl 424 503 0 450 7 0 7 7 0 8 0 knotepl 120 101 0 0 4 0 4 4 0 8 0 kqueuepl 224 35 0 21 1 0 1 1 0 8 0 pipepl 344 122 0 95 3 0 3 3 0 8 0 fdescpl 528 487 0 450 4 0 4 4 0 8 0 filepl 160 1871 0 1629 11 0 11 11 0 8 0 lockfpl 104 32 0 26 1 0 1 1 0 8 0 lockfspl 48 13 0 9 1 0 1 1 0 8 0 sessionpl 144 91 0 74 1 0 1 1 0 8 0 pgrppl 48 104 0 79 1 0 1 1 0 8 0 ucredpl 104 243 0 224 1 0 1 1 0 8 0 zombiepl 144 450 0 450 1 0 1 1 0 8 1 processpl 1232 503 0 450 5 0 5 5 0 8 0 procpl 664 630 0 562 6 0 6 6 0 8 0 sockpl 752 242 0 206 5 0 5 5 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 184 0 0 12 0 12 12 0 8 0 bufpl 280 2306 0 102 158 0 158 158 0 8 0 anonpl 32 8864 0 0 72 0 72 72 0 246 0 amapchunkpl 152 10359 0 9754 27 0 27 27 0 158 3 amappl16 200 2215 0 2193 14 0 14 14 0 8 10 amappl15 192 76 0 76 1 1 0 1 0 8 0 amappl14 184 402 0 401 1 0 1 1 0 8 0 amappl13 176 116 0 106 1 0 1 1 0 8 0 amappl12 168 718 0 682 2 0 2 2 0 8 0 amappl11 160 12 0 12 1 1 0 1 0 8 0 amappl10 152 62 0 52 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 92 0 91 1 0 1 1 0 8 0 amappl7 128 150 0 139 1 0 1 1 0 8 0 amappl6 120 169 0 168 1 0 1 1 0 8 0 amappl5 112 96 0 89 1 0 1 1 0 8 0 amappl4 104 260 0 244 1 0 1 1 0 8 0 amappl3 96 1849 0 1707 5 1 4 4 0 8 0 amappl2 88 514 0 460 2 0 2 2 0 8 0 amappl1 80 10171 0 9590 18 0 18 18 0 8 2 amappl 88 2893 0 2689 5 0 5 5 0 92 0 uvmvnodes 80 100 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 73 0 1 2 0 2 2 0 8 0 uaddrrnd 24 487 0 450 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 487 0 450 1 0 1 1 0 8 0 vmmpekpl 168 5877 0 5845 2 0 2 2 0 8 0 vmmpepl 168 40792 0 38719 122 0 122 122 0 357 26 vmsppl 488 486 0 450 7 1 6 6 0 8 0 rwobjpl 80 15171 0 14124 31 0 31 31 0 8 3 pdppl 4096 981 0 900 107 16 91 97 0 8 10 pvpl 32 16384 0 0 134 1 133 133 0 265 0 pmappl 256 486 0 450 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 276 0 19 8 0 8 8 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(ffffffff83445d60) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff839a15c8,1,ffff80003c44cdc8) at pool_do_get+0x5df pool_get(ffffffff839a15c8,1) at pool_get+0x162 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff80003c3e3780,ffff80003c44d020,0,ffff80003c44cf70) at shmget_allocate_segment+0x1af sys/kern/sysv_shm.c:-1 sys_shmget(ffff80003c3e3780,ffff80003c44d020,ffff80003c44cf70) at sys_shmget+0x195 sys/kern/sysv_shm.c:484 syscall(ffff80003c44d020) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44d020) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd0aba89830, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299adff0) 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 end of kernel end trace frame: 0x7d2b54843540, count: 12 ddb{1}> trace x86_ipi_db(ffff8000299adff0) 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 end of kernel end trace frame: 0x7d2b54843540, count: -3