uvm_fault(0xffffffff83a41368, 0xffffc417b908aabc, 0, 1) -> e kernel: page fault trap, code=0 Stopped at malloc+0x855: movq 0x8(%rbx),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 457718 2345 32767 0x10 0 1 syz-executor * 96774 2345 32767 0x10 0x4000000 0 syz-executor malloc(10,62,2) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_alloc1(20,2,0) at amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 amap_alloc(20000,2,0) at amap_alloc+0xad sys/uvm/uvm_amap.c:-1 amap_copy(fffff7800b1f7d58,fffff7806cfeda50,2,0,80826404000,80826404001) at amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 uvm_fault_check(ffff80003c3e7ba0,ffff80003c3e7bd8,ffff80003c3e7c10,0) at uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 uvm_fault(fffff7800b1f7d58,80826404000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3e7d40,80826404868) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff80003c3e7d40) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 6 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(0xffffffff83a41368, 0xffffc417b908aabc, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace malloc(10,62,2) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_alloc1(20,2,0) at amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 amap_alloc(20000,2,0) at amap_alloc+0xad sys/uvm/uvm_amap.c:-1 amap_copy(fffff7800b1f7d58,fffff7806cfeda50,2,0,80826404000,80826404001) at amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 uvm_fault_check(ffff80003c3e7ba0,ffff80003c3e7bd8,ffff80003c3e7c10,0) at uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 uvm_fault(fffff7800b1f7d58,80826404000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3e7d40,80826404868) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff80003c3e7d40) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0xaad0c417b9083994 rsi 0x552f000000009320 rbp 0xffff80003c3e7840 rbx 0xffffc417b908aab4 rdx 0 rcx 0xffff80003c3d6d20 rax 0xffffffff8390aff0 cpu_info_full_primary+0x1ff0 r8 0x80826404000 r9 0x80826404001 r10 0 r11 0xe13f6393d9360828 r12 0x552f000000009320 r13 0xffffffff83b230a0 kmemstats+0x1880 r14 0xa30c333 __kernel_phys_end+0x670c333 r15 0xaad0c417b9083994 rip 0xffffffff82cc03a5 malloc+0x855 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80003c3e7780 ss 0 malloc+0x855: movq 0x8(%rbx),%r14 ddb{0}> show proc PROC (syz-executor) tid=96774 pid=2345 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002ff894f0,0xffffffff83a7f328 process=0xffff80003c3da208 user=0xffff80003c3e2000, vmspace=0xfffff7800b1f7d58 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 74841 372011 25862 32767 2 0x10 0 syz-executor 64970 360396 78809 32767 2 0x10 0 syz-executor 2345 457718 81437 32767 7 0x10 0 syz-executor * 2345 96774 81437 32767 7 0x10 0x4000000 syz-executor 28495 223595 82292 32767 2 0x10 0 syz-executor 28495 478788 82292 32767 2 0x10 0x4000000 syz-executor 26938 344814 74077 0 3 0x2 0 biowait syz-executor 44250 123579 35132 32767 2 0x10 0 syz-executor 44250 465364 35132 32767 3 0x10 0x4000080 fsleep syz-executor 53042 132984 74077 0 2 0x2 0 syz-executor 81437 436923 11799 32767 3 0x10 0x80 nanoslp syz-executor 11799 331540 74077 0 3 0x2 0x80 wait syz-executor 82292 308825 16560 32767 3 0x10 0x80 nanoslp syz-executor 35132 335610 86988 32767 3 0x10 0x80 nanoslp syz-executor 86988 189191 74077 0 3 0x2 0x80 wait syz-executor 16560 192446 74077 0 3 0x2 0x80 wait syz-executor 86180 202526 74077 0 3 0x2 0x80 wait syz-executor 78809 99168 7073 32767 3 0x10 0x80 nanoslp syz-executor 7073 467515 74077 0 3 0x2 0x80 wait syz-executor 25862 125289 77624 32767 3 0x10 0x80 nanoslp syz-executor 77624 91361 74077 0 3 0x2 0x80 wait syz-executor 74077 8309 52778 0 3 0x2 0x80 kqread syz-executor 52778 506410 93124 0 3 0x100002 0x88 sigsusp ksh 93124 250323 87331 0 3 0x10 0x88 kqread sshd-session 87331 379427 31742 0 3 0x12 0x80 kqread sshd-session 49838 96356 1 0 3 0x100003 0x80 ttyin getty 31742 104173 1 0 3 0 0x88 kqread sshd 72695 131787 38390 73 3 0x1100010 0x80 kqread syslogd 38390 317994 1 0 3 0x100002 0x80 sbwait syslogd 48032 309761 1 0 3 0x100000 0x80 kqread resolvd 50318 78089 14047 77 3 0x100012 0x80 kqread dhcpleased 28175 415495 14047 77 3 0x100012 0x80 kqread dhcpleased 14047 228767 1 0 3 0 0x80 kqread dhcpleased 3484 12474 0 0 3 0x14000 0x200 bored smr 82285 357774 0 0 2 0x14000 0x200 zerothread 44941 484717 0 0 3 0x14000 0x200 aiodoned aiodoned 98530 190587 0 0 3 0x14000 0x200 syncer update 43842 64893 0 0 3 0x14000 0x200 cleaner cleaner 98786 109138 0 0 3 0x14000 0x200 reaper reaper 68629 13637 0 0 3 0x14000 0x200 pgdaemon pagedaemon 79246 98732 0 0 3 0x14000 0x200 bored viomb 23238 182194 0 0 3 0x14000 0x40000200 acpi0 acpi0 74584 377049 0 0 3 0x14000 0x40000200 idle1 18655 169062 0 0 3 0x14000 0x200 bored softnet1 15389 241571 0 0 3 0x14000 0x200 bored softnet0 26208 325366 0 0 3 0x14000 0x200 smrbar systqmp 25695 213910 0 0 3 0x14000 0x200 bored systq 28199 96060 0 0 3 0x14000 0x200 tmoslp softclockmp 67367 484888 0 0 3 0x14000 0x40000200 tmoslp softclock 77106 63882 0 0 3 0x14000 0x40000200 idle0 1 258955 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839a43e8) #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 malloc+0x2ef sys/kern/kern_malloc.c:200 #3 amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 #4 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #5 amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 #6 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #7 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #8 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #9 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #10 recall_trap+0x8 Process 2345 (syz-executor) thread 0xffff80003c3d6d20 (96774) exclusive rwlock vmmaplk r = 0 (0xfffff7800b1f7e58) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #7 recall_trap+0x8 exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839a43e8) #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 malloc+0x2ef sys/kern/kern_malloc.c:200 #3 amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 #4 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #5 amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 #6 uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 #7 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #8 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 #9 usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 #10 recall_trap+0x8 Process 26938 (syz-executor) thread 0xffff80002ff88a90 (344814) exclusive rrwlock inode r = 0 (0xfffff780754b05a0) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff780701bd6a0) #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+0x7c1 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 26208 (systqmp) thread 0xffff800045ffe000 (325366) shared rwlock systqmp r = 0 (0xffffffff839c3118) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11048 12014K 12034K 166960K 12238 0 pcb 17 12K 12K 166960K 17 0 rtable 199 5K 7K 166960K 1295 0 pf 27 16K 16K 166960K 93 0 ifaddr 36 6K 7K 166960K 172 0 ifgroup 42 1K 2K 166960K 174 0 sysctl 4 1K 9K 166960K 8 0 counters 66 36K 37K 166960K 132 0 ioctlops 0 0K 4K 166960K 74 0 iov 0 0K 8K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1849 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 27 3K 3K 166960K 31 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 21 74K 129K 166960K 1016 0 sigio 0 0K 0K 166960K 3 0 proc 58 99K 163K 166960K 1434 0 subproc 56 3K 4K 166960K 443 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 182 0 in_multi 77 5K 6K 166960K 457 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 13 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 877 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 203 159K 197K 166960K 9125 0 UVM aobj 13 2K 2K 166960K 13 0 pinsyscall 42 84K 116K 166960K 2994 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 9 0K 2K 166960K 120 0 temp 45 9118K 9182K 166960K 8393 0 kqueue 13 20K 32K 166960K 102 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 122 0 119 1 0 1 1 0 8 0 rtentry 176 455 0 364 6 0 6 6 0 8 0 unpcb 144 409 0 394 6 0 6 6 0 8 5 syncache 336 13 0 13 1 0 1 1 0 8 1 tcpqe 32 8 0 8 2 1 1 1 0 8 1 tcpcb 736 217 0 208 7 0 7 7 0 8 6 arp 136 82 0 67 1 0 1 1 0 8 0 ipq 40 4 0 2 1 0 1 1 0 8 0 ipqe 40 7 0 5 1 0 1 1 0 8 0 inpcb 328 549 0 536 7 0 7 7 0 8 5 ip6q 80 1 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 152 118 0 100 1 0 1 1 0 8 0 kcovpl 48 49 0 43 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1836 0 1421 32 1 31 32 0 8 2 art_table 40 1837 0 1421 6 0 6 6 0 8 0 art_node 32 455 0 365 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 72 28 0 3 1 0 1 1 0 8 0 shmpl 120 10 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2208 0 644 99 0 99 99 0 8 0 ffsino 296 2208 0 644 121 0 121 121 0 8 0 nchpl 144 2879 0 1081 67 0 67 67 0 8 0 vnodes 216 2660 0 0 148 0 148 148 0 8 0 namei 1024 14274 0 14273 3 1 2 2 0 8 1 percpumem 16 82 0 33 1 0 1 1 0 8 0 kstatmem 264 87 0 66 2 0 2 2 0 8 0 scxspl 216 10674 0 10673 6 3 3 3 1 8 2 plimitpl 152 177 0 155 2 0 2 2 0 8 0 sigapl 424 1244 0 1195 7 0 7 7 0 8 0 knotepl 120 540 0 0 17 0 17 17 0 8 0 kqueuepl 224 124 0 115 1 0 1 1 0 8 0 pipepl 344 286 0 259 4 0 4 4 0 8 0 fdescpl 528 1228 0 1195 4 0 4 4 0 8 1 filepl 160 5195 0 5008 16 1 15 15 0 8 4 lockfpl 104 122 0 120 1 0 1 1 0 8 0 lockfspl 48 46 0 44 1 0 1 1 0 8 0 sessionpl 144 86 0 72 1 0 1 1 0 8 0 pgrppl 48 138 0 116 1 0 1 1 0 8 0 ucredpl 104 1058 0 1041 1 0 1 1 0 8 0 zombiepl 144 1196 0 1195 1 0 1 1 0 8 0 processpl 1240 1244 0 1195 5 0 5 5 0 8 0 procpl 664 1848 0 1796 7 0 7 7 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 1085 0 1054 17 5 12 17 0 8 8 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 46 0 0 6 0 6 6 0 8 0 mextrefs 64 45 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 289 0 0 19 0 19 19 0 8 0 bufpl 272 3649 0 112 236 0 236 236 0 8 0 anonpl 32 6460 0 0 53 0 53 53 0 247 0 amapchunkpl 152 26838 0 26435 35 0 35 35 0 158 12 amappl16 200 2204 0 2189 7 2 5 5 0 8 4 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 783 0 782 1 0 1 1 0 8 0 amappl13 176 202 0 191 1 0 1 1 0 8 0 amappl12 168 1599 0 1569 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 218 0 217 1 0 1 1 0 8 0 amappl7 128 213 0 202 1 0 1 1 0 8 0 amappl6 120 457 0 455 1 0 1 1 0 8 0 amappl5 112 113 0 104 1 0 1 1 0 8 0 amappl4 104 395 0 379 1 0 1 1 0 8 0 amappl3 96 4705 0 4629 4 1 3 3 0 8 0 amappl2 88 1332 0 1257 3 0 3 3 0 8 0 amappl1 80 19123 0 18580 16 0 16 16 0 8 1 amappl 88 7738 0 7597 5 0 5 5 0 92 0 uvmvnodes 80 112 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1228 0 1195 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1228 0 1195 1 0 1 1 0 8 0 vmmpekpl 168 12613 0 12544 4 0 4 4 0 8 0 vmmpepl 168 90574 0 88769 104 1 103 104 0 357 14 vmsppl 488 1227 0 1195 7 1 6 6 0 8 1 rwobjpl 80 28348 0 27456 25 0 25 25 0 8 1 pdppl 4096 2463 0 2390 135 54 81 99 0 8 8 pvpl 32 14556 0 0 118 0 118 118 0 265 0 pmappl 256 1227 0 1195 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 565 0 59 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace malloc(10,62,2) at malloc+0x855 sys/kern/kern_malloc.c:294 amap_alloc1(20,2,0) at amap_alloc1+0x291 sys/uvm/uvm_amap.c:356 amap_alloc(20000,2,0) at amap_alloc+0xad sys/uvm/uvm_amap.c:-1 amap_copy(fffff7800b1f7d58,fffff7806cfeda50,2,0,80826404000,80826404001) at amap_copy+0x6a8 sys/uvm/uvm_amap.c:570 uvm_fault_check(ffff80003c3e7ba0,ffff80003c3e7bd8,ffff80003c3e7c10,0) at uvm_fault_check+0x473 sys/uvm/uvm_fault.c:747 uvm_fault(fffff7800b1f7d58,80826404000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3e7d40,80826404868) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff80003c3e7d40) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -9 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 end of kernel end trace frame: 0x7be1cc7e5ee0, count: 12 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 end of kernel end trace frame: 0x7be1cc7e5ee0, count: -3