witness: lock order reversal: 1st 0xffffffff82cc8bd0 &sched_lock (&sched_lock) 2nd 0xffff8000ffff51e8 &pr->ps_mtx (&pr->ps_mtx) lock order "&pr->ps_mtx"(mutex) -> "&sched_lock"(sched_lock) first seen at: #0 __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] #0 __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] #0 __mp_lock+0xa2 sys/kern/kern_lock.c:142 #1 donice+0x178 sys/kern/kern_resource.c:218 #2 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 lock order "&sched_lock"(sched_lock) -> "&pr->ps_mtx"(mutex) first seen at: #0 mtx_enter+0x3e sys/kern/kern_lock.c:265 #1 single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] #1 single_thread_set+0x35a sys/kern/kern_sig.c:2155 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000ffff51e8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff51e8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff51d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff80002127da98,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff80002127da98,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff80002127da98,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff80002127da98,6,ffff80002e4470b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff80002127da98) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e4471f0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e4471f0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4060caabcb0, count: -9 ddb{1}> show registers rdi 0x3 rsi 0xffffffff82bf22f0 __sancov_gen_cov_switch_values.134 rbp 0xffff80002e446dc0 rbx 0x3 rdx 0 rcx 0xffff80002127da98 rax 0xffff800020d58ff0 r8 0xffff80002e446d30 r9 0x8080808080808080 r10 0xa31a21fbe5c39155 r11 0x7dada9632e51cd94 r12 0xfffffd8003a0a590 r13 0 r14 0xfffffd80039f9ef0 r15 0xfffffd80031c7bc0 rip 0xffffffff81b6e27c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e446db0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=298913 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff80002126f7e8,0xffff8000211efd58 process=0xffff8000ffff50d8 user=0xffff80002e442000, vmspace=0xfffffd80646e0938 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90787 60921 32422 32767 2 0x10 syz-executor.0 90787 258244 32422 32767 3 0x4000010 biowait syz-executor.0 31541 62352 50544 32767 4 0x582010 syz-executor.5 31541 309302 50544 32767 4 0x4580090 fsleep syz-executor.5 31541 313253 50544 32767 4 0x4580090 fsleep syz-executor.5 *31541 298913 50544 32767 7 0x4502010 syz-executor.5 91361 237240 66110 32767 7 0x10 syz-executor.3 91361 469996 66110 32767 3 0x4000090 fsleep syz-executor.3 91361 237638 66110 32767 2 0x4000010 syz-executor.3 23469 82003 2864 32767 2 0x10 syz-executor.1 23251 65602 49907 32767 3 0x90 nanoslp syz-executor.6 23251 82183 49907 32767 3 0x4000090 fsleep syz-executor.6 23251 33069 49907 32767 2 0x4000010 syz-executor.6 21935 408867 4547 32767 2 0x10 syz-executor.4 21935 110872 4547 32767 3 0x4000090 fsleep syz-executor.4 21935 400603 4547 32767 3 0x4000090 fsleep syz-executor.4 32422 83171 92440 32767 3 0x90 nanoslp syz-executor.0 92440 160044 45767 0 3 0x82 wait syz-executor.0 4547 253511 84005 32767 3 0x90 nanoslp syz-executor.4 84005 146178 45767 0 3 0x82 wait syz-executor.4 84413 431706 0 0 3 0x14200 bored sosplice 49907 299364 49651 32767 3 0x90 nanoslp syz-executor.6 1142 323862 38390 32767 3 0x90 nanoslp syz-executor.7 38390 385041 45767 0 3 0x82 wait syz-executor.7 49651 144714 45767 0 3 0x82 wait syz-executor.6 50544 164994 92990 32767 3 0x90 nanoslp syz-executor.5 92990 143798 45767 0 3 0x82 wait syz-executor.5 66110 432823 1841 32767 3 0x90 nanoslp syz-executor.3 1841 260188 45767 0 3 0x82 wait syz-executor.3 2864 14972 19764 32767 3 0x90 nanoslp syz-executor.1 4109 405087 45404 32767 3 0x10 biowait syz-executor.2 45404 424223 45767 0 3 0x82 wait syz-executor.2 19764 328712 45767 0 3 0x82 wait syz-executor.1 45767 206374 78742 0 3 0x2000082 wait syz-fuzzer 45767 287196 78742 0 3 0x6000082 nanoslp syz-fuzzer 45767 485449 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 84226 78742 0 3 0x6000082 wait syz-fuzzer 45767 11933 78742 0 3 0x6000082 wait syz-fuzzer 45767 237412 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 278549 78742 0 3 0x6000082 wait syz-fuzzer 45767 276718 78742 0 3 0x6000082 wait syz-fuzzer 45767 512346 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 361814 78742 0 3 0x6000082 wait syz-fuzzer 45767 45289 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 101532 78742 0 3 0x6000082 wait syz-fuzzer 45767 212186 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 266437 78742 0 3 0x6000082 kqread syz-fuzzer 45767 478282 78742 0 3 0x6000082 thrsleep syz-fuzzer 45767 313941 78742 0 3 0x6000082 wait syz-fuzzer 78742 442708 21602 0 3 0x10008a sigsusp ksh 21602 25181 59465 0 3 0x9a kqread sshd 8886 50625 1 0 3 0x100083 ttyin getty 59465 74253 1 0 3 0x88 kqread sshd 40004 63872 22316 73 3 0x1100090 kqread syslogd 22316 18669 1 0 3 0x100082 netio syslogd 28085 79139 1 0 3 0x100080 kqread resolvd 43332 485310 21201 77 3 0x100092 kqread dhcpleased 47712 239921 21201 77 3 0x100092 kqread dhcpleased 21201 154494 1 0 3 0x80 kqread dhcpleased 34364 29024 0 0 3 0x14200 bored smr 86412 344953 0 0 2 0x14200 zerothread 5841 239656 0 0 3 0x14200 aiodoned aiodoned 10128 448414 0 0 3 0x14200 syncer update 39705 469518 0 0 3 0x14200 cleaner cleaner 84164 172019 0 0 3 0x14200 reaper reaper 4233 312537 0 0 3 0x14200 pgdaemon pagedaemon 35697 35826 0 0 3 0x14200 bored viomb 37123 58122 0 0 3 0x40014200 acpi0 acpi0 71446 247807 0 0 3 0x40014200 idle1 98445 350339 0 0 3 0x14200 bored softnet3 29238 221824 0 0 3 0x14200 bored softnet2 15695 508302 0 0 3 0x14200 bored softnet1 71794 350940 0 0 3 0x14200 bored softnet0 89230 136550 0 0 3 0x14200 bored systqmp 55962 401806 0 0 3 0x14200 bored systq 95409 274112 0 0 3 0x40014200 bored softclock 83634 270763 0 0 3 0x40014200 idle0 1 226457 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 90787 (syz-executor.0) thread 0xffff8000211efd48 (258244) exclusive rrwlock inode r = 0 (0xfffffd8064aa83c8) #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 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_makeinode+0xb2 sys/ufs/ufs/ufs_vnops.c:1817 #8 ufs_mknod+0x52 sys/ufs/ufs/ufs_vnops.c:171 #9 VOP_MKNOD+0xc3 sys/kern/vfs_vops.c:121 #10 domknodat+0x32a sys/kern/vfs_syscalls.c:1627 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8064aa84d8) #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 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domknodat+0x96 sys/kern/vfs_syscalls.c:1579 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 31541 (syz-executor.5) thread 0xffff80002127da98 (298913) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ca0228) #0 witness_lock+0x447 #1 postsig+0x49e sys/kern/kern_sig.c:1500 #2 userret+0x16e sys/kern/kern_sig.c:1987 #3 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #3 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #4 Xsyscall+0x128 exclusive sched_lock &sched_lock r = 0 (0xffffffff82cc8bd0) #0 witness_lock+0x447 #1 single_thread_set+0x179 sys/kern/kern_sig.c:2113 #2 sigexit+0x90 sys/kern/kern_sig.c:1562 #3 postsig+0x4a9 sys/kern/kern_sig.c:1494 #4 userret+0x16e sys/kern/kern_sig.c:1987 #5 syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] #5 syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 #6 Xsyscall+0x128 Process 4109 (syz-executor.2) thread 0xffff8000211ef2a8 (405087) exclusive rrwlock inode r = 0 (0xfffffd8064aa8e68) #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 (0xfffffd806d6bdf88) #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 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 6408K 6420K 78643K 11281 0 pcb 13 12K 14K 78643K 17 0 rtable 238 6K 7K 78643K 604 0 pf 29 8K 8K 78643K 39 0 ifaddr 44 15K 15K 78643K 68 0 ifgroup 50 2K 2K 78643K 70 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 70 0 ioctlops 0 0K 2K 78643K 39 0 iov 0 0K 18K 78643K 270 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1999 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 35 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 451 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 2499 0 sigio 0 0K 0K 78643K 16 0 proc 56 78K 115K 78643K 716 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 258 0 in_multi 99 7K 7K 78643K 188 0 ether_multi 1 0K 0K 78643K 7 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 778 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 377 89K 103K 78643K 26579 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 0 0K 0K 78643K 159 0 NDP 11 0K 2K 78643K 42 0 temp 74 5920K 5985K 78643K 9958 0 kqueue 12 18K 26K 78643K 211 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 120 568 0 565 6 4 2 3 0 8 1 rtentry 112 170 0 58 4 0 4 4 0 8 0 unpcb 144 1238 0 1225 13 12 1 4 0 8 0 syncache 304 43 0 43 6 5 1 1 0 8 1 tcpqe 32 671 0 671 7 6 1 2 0 8 1 tcpcb 808 965 0 956 34 25 9 12 0 8 7 arp 120 29 0 11 1 0 1 1 0 8 0 inpcb 368 2420 0 2407 47 39 8 13 0 8 6 nd6 136 42 0 16 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 696 0 236 30 1 29 30 0 8 0 art_table 32 697 0 236 4 0 4 4 0 8 0 art_node 16 169 0 67 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 446 0 436 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 4896 0 3455 91 0 91 91 0 8 0 ffsino 272 4896 0 3455 97 0 97 97 0 8 0 nchpl 144 8188 0 6546 63 0 63 63 0 8 0 uvmvnodes 80 5074 0 0 104 0 104 104 0 8 0 vnodes 216 5074 0 0 282 0 282 282 0 8 0 namei 1024 28583 0 28582 2 1 1 2 0 8 0 percpumem 16 48 0 5 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 23197 0 23195 20 19 1 8 1 8 0 plimitpl 152 708 0 685 7 6 1 2 0 8 0 sigapl 424 2786 0 2732 7 0 7 7 0 8 0 futexpl 64 20072 0 20066 1 0 1 1 0 8 0 knotepl 120 175 0 0 5 0 5 5 0 8 0 kqueuepl 216 483 0 474 9 8 1 5 0 8 0 pipepl 320 528 0 500 17 14 3 9 0 8 0 fdescpl 496 2768 0 2733 7 2 5 6 0 8 0 filepl 152 17566 0 17331 44 31 13 16 0 8 3 lockfpl 104 494 0 492 2 1 1 2 0 8 0 lockfspl 48 85 0 83 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 34 0 18 1 0 1 1 0 8 0 ucredpl 104 4308 0 4290 1 0 1 1 0 8 0 zombiepl 144 2733 0 2732 1 0 1 1 0 8 0 processpl 1072 2786 0 2732 5 1 4 5 0 8 0 procpl 680 6954 0 6875 13 5 8 8 0 8 1 sosppl 168 34 0 34 4 3 1 1 0 8 1 sockpl 488 4297 0 4268 93 76 17 22 0 8 12 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 1 2 3 0 8 0 mcl4k 4096 31 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 349 0 0 43 3 40 43 0 8 0 mtagpl 96 58 0 0 2 0 2 2 0 8 0 mbufpl 256 378 0 0 21 0 21 21 0 8 0 bufpl 288 7449 0 1124 452 0 452 452 0 8 0 anonpl 24 400584 0 389686 108 30 78 93 0 186 0 amapchunkpl 152 84738 0 83818 68 30 38 51 0 158 2 amappl16 200 9369 0 9055 44 22 22 28 0 8 0 amappl15 192 15 0 14 1 0 1 1 0 8 0 amappl14 184 186 0 169 2 1 1 2 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 3464 0 3429 2 0 2 2 0 8 0 amappl11 160 122 0 112 1 0 1 1 0 8 0 amappl10 152 30 0 20 1 0 1 1 0 8 0 amappl9 144 207 0 205 1 0 1 1 0 8 0 amappl8 136 279 0 204 3 0 3 3 0 8 0 amappl7 128 107 0 93 2 0 2 2 0 8 0 amappl6 120 301 0 274 2 1 1 2 0 8 0 amappl5 112 256 0 247 1 0 1 1 0 8 0 amappl4 104 648 0 608 4 2 2 2 0 8 0 amappl3 96 16897 0 16800 3 0 3 3 0 8 0 amappl2 88 3130 0 3059 3 1 2 3 0 8 0 amappl1 80 18293 0 17767 22 10 12 22 0 8 0 amappl 88 25944 0 25683 8 1 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 2768 0 2733 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2768 0 2733 1 0 1 1 0 8 0 vmmpekpl 168 25381 0 25321 3 0 3 3 0 8 0 vmmpepl 168 180707 0 178313 174 59 115 125 0 357 9 vmsppl 464 2767 0 2733 7 2 5 6 0 8 0 rwobjpl 56 55976 0 49429 95 2 93 93 0 8 0 pdppl 4096 5544 0 5466 224 142 82 96 0 8 4 pvpl 32 996567 0 979695 354 200 154 353 0 265 0 pmappl 248 2767 0 2733 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1071 0 219 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82c05ff0) 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(ffffffff82ca0020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ca0020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002e423680,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x73da068efc90, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000ffff51e8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff51e8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff51d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff80002127da98,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff80002127da98,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff80002127da98,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff80002127da98,6,ffff80002e4470b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff80002127da98) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e4471f0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e4471f0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4060caabcb0, count: -9