uvm_fault(0xfffffd8067e413c8, 0x7, 0, 1) -> e kernel: page fault trap, cpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 677 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *519589 27917 32767 0x10 0x4000000 1 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff827e441a,2a5,ffffffff827da394) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: uvm_fault(0xfffffd8067e413c8, 0x7, 0, 1) -> e cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 677 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff827e441a,2a5,ffffffff827da394) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002613f6d0 rbx 0xffff800020d59b9f rdx 0 rcx 0xffff8000212622c8 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4d2bfbe14c758575 r11 0xdae98bdf51f622fa r12 0xffff800020d599a0 r13 0 r14 0xffffffff82c3a9a0 cpu_info_full_primary+0x29a0 r15 0x1 rip 0xffffffff814d940c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002613f6c0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=519589 stat=onproc flags process=10 proc=4000000 pri=82, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800021262020,0xffff800021262580 process=0xffff80002e4150e0 user=0xffff80002613a000, vmspace=0xfffffd8069ad9b00 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 27917 194733 78436 32767 2 0x10 syz-executor.0 *27917 519589 78436 32767 7 0x4000010 syz-executor.0 27917 221746 78436 32767 2 0x4000010 syz-executor.0 18312 151791 47761 32767 2 0x10 syz-executor.7 18312 267195 47761 32767 3 0x4000090 fsleep syz-executor.7 96656 369366 42465 32767 2 0x10 syz-executor.1 96656 353362 42465 32767 3 0x4000090 netio syz-executor.1 96656 62267 42465 32767 3 0x4000090 netio syz-executor.1 96656 405714 42465 32767 3 0x4000090 fsleep syz-executor.1 96656 488084 42465 32767 2 0x4000010 syz-executor.1 5577 463358 0 0 3 0x14200 bored sosplice 47761 100682 53936 32767 3 0x90 nanoslp syz-executor.7 53936 472082 81977 0 3 0x82 wait syz-executor.7 7404 169238 74652 32767 3 0x90 nanoslp syz-executor.6 74652 1383 81977 0 3 0x82 wait syz-executor.6 74738 318110 17736 32767 3 0x90 nanoslp syz-executor.5 17736 363573 81977 0 3 0x82 wait syz-executor.5 81451 91762 92697 32767 2 0x10 syz-executor.2 94669 517721 30230 32767 2 0x10 syz-executor.4 30230 38616 81977 0 3 0x82 wait syz-executor.4 42465 287493 32652 32767 3 0x90 nanoslp syz-executor.1 33330 459112 33347 32767 3 0x90 nanoslp syz-executor.3 92697 39923 81977 0 3 0x82 wait syz-executor.2 78436 482610 20159 32767 3 0x90 nanoslp syz-executor.0 33347 211842 81977 0 3 0x82 wait syz-executor.3 32652 521074 81977 0 3 0x82 wait syz-executor.1 20159 2613 81977 0 3 0x82 wait syz-executor.0 81977 511970 82295 0 3 0x2000082 thrsleep syz-fuzzer 81977 427949 82295 0 3 0x6000082 nanoslp syz-fuzzer 81977 495753 82295 0 3 0x6000082 wait syz-fuzzer 81977 329714 82295 0 3 0x6000082 wait syz-fuzzer 81977 485237 82295 0 3 0x6000082 wait syz-fuzzer 81977 457382 82295 0 3 0x6000082 thrsleep syz-fuzzer 81977 154917 82295 0 3 0x6000082 wait syz-fuzzer 81977 501512 82295 0 3 0x6000082 thrsleep syz-fuzzer 81977 479040 82295 0 3 0x6000082 wait syz-fuzzer 81977 419358 82295 0 3 0x6000082 wait syz-fuzzer 81977 476399 82295 0 3 0x6000082 wait syz-fuzzer 81977 155553 82295 0 3 0x6000082 thrsleep syz-fuzzer 81977 218073 82295 0 3 0x6000082 thrsleep syz-fuzzer 81977 80264 82295 0 3 0x6000082 wait syz-fuzzer 81977 120705 82295 0 2 0x6000082 syz-fuzzer 81977 257185 82295 0 2 0x6000082 syz-fuzzer 82295 326664 44765 0 3 0x10008a sigsusp ksh 44765 423033 57068 0 2 0x9a sshd 78765 87963 1 0 3 0x100083 ttyin getty 57068 26311 1 0 3 0x88 kqread sshd 74015 93786 55875 73 3 0x1100090 kqread syslogd 55875 304378 1 0 3 0x100082 netio syslogd 82940 197543 1 0 3 0x100080 kqread resolvd 5062 185244 14516 77 3 0x100092 kqread dhcpleased 48457 383982 14516 77 3 0x100092 kqread dhcpleased 14516 475755 1 0 3 0x80 kqread dhcpleased 9848 139247 0 0 3 0x14200 bored smr 75624 6573 0 0 2 0x14200 zerothread 69211 271430 0 0 3 0x14200 aiodoned aiodoned 23139 197238 0 0 3 0x14200 syncer update 8242 169841 0 0 3 0x14200 cleaner cleaner 47929 68670 0 0 2 0x14200 reaper 17010 314765 0 0 3 0x14200 pgdaemon pagedaemon 82779 512438 0 0 3 0x14200 bored viomb 37418 310635 0 0 3 0x40014200 acpi0 acpi0 86063 452196 0 0 3 0x40014200 idle1 60316 474303 0 0 3 0x14200 bored softnet3 6863 34662 0 0 3 0x14200 bored softnet2 94761 143874 0 0 3 0x14200 bored softnet1 14240 294377 0 0 2 0x14200 softnet0 47130 482750 0 0 3 0x14200 bored systqmp 86919 161614 0 0 3 0x14200 bored systq 72052 340402 0 0 3 0x40014200 bored softclock 39723 445042 0 0 3 0x40014200 idle0 1 85518 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 94669 (syz-executor.4) thread 0xffff8000212632b8 (517721) exclusive rrwlock inode r = 0 (0xfffffd80774fd3d8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066988d58) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 cache_lookup+0x2b4 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1ac sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #10 namei+0x55a sys/kern/vfs_lookup.c:250 #11 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6409K 6420K 78643K 11269 0 pcb 13 14K 18K 78643K 17 0 rtable 236 6K 6K 78643K 363 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 42 0 iov 1 2K 16K 78643K 155 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1641 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 23 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 14 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 1404 0 sigio 0 0K 0K 78643K 19 0 proc 56 78K 103K 78643K 534 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 35 0 in_multi 99 7K 7K 78643K 108 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 1K 78643K 504 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 338 84K 86K 78643K 15910 0 UVM aobj 75 3K 3K 78643K 75 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 31 0 NDP 11 0K 2K 78643K 27 0 temp 74 5920K 5986K 78643K 7262 0 kqueue 12 18K 24K 78643K 129 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 56 0 53 1 0 1 1 0 8 0 rtentry 112 113 0 2 4 0 4 4 0 8 0 unpcb 144 763 0 747 10 5 5 5 0 8 4 syncache 304 24 0 24 6 5 1 1 0 8 1 tcpqe 32 252 0 252 4 3 1 1 0 8 1 tcpcb 808 536 0 524 22 14 8 8 0 8 6 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 7 0 7 1 0 1 1 0 8 1 ipqe 40 26 0 26 1 0 1 1 0 8 1 inpcb 368 1898 0 1883 40 32 8 23 0 8 6 nd6 136 26 0 1 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 256 462 0 7 29 0 29 29 0 8 0 art_table 32 463 0 7 4 0 4 4 0 8 0 art_node 16 112 0 11 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 72 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3315 0 1873 91 0 91 91 0 8 0 ffsino 272 3315 0 1873 97 0 97 97 0 8 0 nchpl 144 5218 0 3536 63 0 63 63 0 8 0 uvmvnodes 80 3428 0 0 70 0 70 70 0 8 0 vnodes 216 3428 0 0 191 0 191 191 0 8 0 namei 1024 17712 0 17712 2 1 1 2 0 8 1 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 24265 0 24265 16 12 4 8 1 8 4 plimitpl 152 161 0 137 2 1 1 2 0 8 0 sigapl 424 1703 0 1650 7 0 7 7 0 8 0 futexpl 64 10588 0 10586 2 1 1 1 0 8 0 knotepl 120 563 0 0 18 2 16 18 0 8 0 kqueuepl 216 278 0 270 5 4 1 5 0 8 0 pipepl 320 442 0 414 11 3 8 8 0 8 5 fdescpl 496 1685 0 1652 7 2 5 6 0 8 0 filepl 152 10671 0 10429 34 19 15 19 0 8 5 lockfpl 104 348 0 346 2 1 1 2 0 8 0 lockfspl 48 73 0 71 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 274 0 258 1 0 1 1 0 8 0 ucredpl 104 1725 0 1707 1 0 1 1 0 8 0 zombiepl 144 1653 0 1650 1 0 1 1 0 8 0 processpl 1072 1703 0 1650 5 0 5 5 0 8 0 procpl 680 4086 0 4010 10 2 8 8 0 8 1 sosppl 168 27 0 27 4 3 1 1 0 8 1 sockpl 488 2731 0 2697 72 59 13 34 0 8 8 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 39 0 0 5 2 3 5 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 270 0 0 34 0 34 34 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 1017 0 0 60 0 60 60 0 8 0 bufpl 288 6717 0 392 452 0 452 452 0 8 0 anonpl 24 432975 0 421850 134 18 116 118 0 186 25 amapchunkpl 152 51350 0 50512 53 13 40 46 0 158 5 amappl16 200 15067 0 14765 83 58 25 42 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 151 0 140 2 1 1 2 0 8 0 amappl13 176 20 0 19 1 0 1 1 0 8 0 amappl12 168 2320 0 2285 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 26 0 17 1 0 1 1 0 8 0 amappl9 144 181 0 179 2 1 1 1 0 8 0 amappl8 136 251 0 188 3 0 3 3 0 8 0 amappl7 128 65 0 52 2 0 2 2 0 8 0 amappl6 120 219 0 202 2 1 1 2 0 8 0 amappl5 112 201 0 191 1 0 1 1 0 8 0 amappl4 104 595 0 555 3 1 2 3 0 8 0 amappl3 96 10435 0 10347 3 0 3 3 0 8 0 amappl2 88 1991 0 1922 3 1 2 3 0 8 0 amappl1 80 14241 0 13717 22 9 13 22 0 8 0 amappl 88 15360 0 15133 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 74 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1685 0 1652 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1685 0 1652 1 0 1 1 0 8 0 vmmpekpl 168 19101 0 19043 3 0 3 3 0 8 0 vmmpepl 168 125349 0 123083 147 21 126 128 0 357 20 vmsppl 464 1684 0 1652 7 2 5 6 0 8 0 rwobjpl 56 47174 0 42376 71 1 70 70 0 8 0 pdppl 4096 3377 0 3304 143 62 81 93 0 8 8 pvpl 32 905039 0 888070 363 83 280 362 0 265 126 pmappl 248 1684 0 1652 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 997 0 115 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c39ff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002c9dede0,ffff800000077d00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(63) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(63) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff827b90a2) at db_printf+0x89 sys/kern/subr_prf.c:498 db_ktrap(6,0,ffff80002c9df2a0) at db_ktrap+0x12c sys/arch/amd64/amd64/db_interface.c:128 end trace frame: 0xffff80002c9df290, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82c39ff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002c9dede0,ffff800000077d00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(63) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(63) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff827b90a2) at db_printf+0x89 sys/kern/subr_prf.c:498 db_ktrap(6,0,ffff80002c9df2a0) at db_ktrap+0x12c sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002c9df2a0) at kerntrap+0x143 sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b witness_checkorder(fffffd806f1e35f8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1e35e8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800026363548,fffffd806f1e35e8,fffffd806f1e3670,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800026363548,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800026363548) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800026363548,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800026363548,ffff80002c9df660,ffff80002c9df6b0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002c9df730) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002c9df730) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a91499070d0, count: -25 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff827e441a,2a5,ffffffff827da394) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a57c9) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff828214f5,ffffffff827e441a,2a5,ffffffff827da394) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4