witness: lock order reversal: 1st 0xffffffff82ce5ec8 &sched_lock (&sched_lock) 2nd 0xffff8000ffff62b0 &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(ffff8000ffff62b0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff62b0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff62a0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000211d9008,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000211d9008,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000211d9008,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000211d9008,6,ffff800027b6d368) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000211d9008) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff800027b6d4a0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff800027b6d4a0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fad1635fa0, count: -9 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff800027b6d070 rbx 0x3 rdx 0xffff800000d0ce80 rcx 0xffff8000211d9008 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff800027b6cfe0 r9 0x8080808080808080 r10 0x5756c7a87d2970a5 r11 0x993d4107003d1a7f r12 0xfffffd8003a0b640 r13 0 r14 0xfffffd80039fb470 r15 0xfffffd80031c8bc0 rip 0xffffffff8224dbac db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800027b6d060 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=155425 stat=onproc flags process=500000 proc=4002000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800021275a90,0xffffffff82cd3878 process=0xffff8000ffff61a0 user=0xffff800027b68000, vmspace=0xfffffd806e3cb1e0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1637 41355 40110 0 4 0x582000 syz-executor.6 * 1637 155425 40110 0 7 0x4502000 syz-executor.6 42748 292956 53068 0 2 0 syz-executor.4 42748 211828 53068 0 3 0x4000080 kqread syz-executor.4 79651 432685 26466 0 2 0 syz-executor.7 64535 316182 85329 0 7 0 syz-executor.1 92853 522108 89024 0 2 0 syz-executor.3 92853 38043 89024 0 3 0x4000080 fsleep syz-executor.3 28461 287499 83074 0 2 0 syz-executor.0 28461 336482 83074 0 3 0x4000080 fsleep syz-executor.0 67125 426082 73810 0 2 0 syz-executor.2 89024 298587 82632 0 3 0x82 nanoslp syz-executor.3 73810 60141 82632 0 3 0x82 nanoslp syz-executor.2 40110 343537 82632 0 3 0x82 nanoslp syz-executor.6 17394 86826 0 0 3 0x14280 nfsidl nfsio 92229 282725 0 0 3 0x14280 nfsidl nfsio 94386 405196 0 0 3 0x14280 nfsidl nfsio 14147 301120 0 0 3 0x14280 nfsidl nfsio 88044 266247 0 0 3 0x14280 nfsidl nfsio 74734 380524 0 0 3 0x14280 nfsidl nfsio 40581 52567 0 0 3 0x14280 nfsidl nfsio 13918 226120 0 0 3 0x14280 nfsidl nfsio 32426 325166 0 0 3 0x14280 nfsidl nfsio 97153 170750 0 0 3 0x14280 nfsidl nfsio 96023 275904 0 0 3 0x14280 nfsidl nfsio 98894 210941 0 0 3 0x14280 nfsidl nfsio 90464 93316 0 0 3 0x14280 nfsidl nfsio 16239 379324 0 0 3 0x14280 nfsidl nfsio 82846 851 0 0 3 0x14280 nfsidl nfsio 62511 485720 0 0 3 0x14280 nfsidl nfsio 72717 252558 0 0 3 0x14280 nfsidl nfsio 23919 490854 0 0 3 0x14280 nfsidl nfsio 66342 295521 0 0 3 0x14280 nfsidl nfsio 47049 521778 0 0 3 0x14280 nfsidl nfsio 34418 509197 0 0 3 0x14200 bored sosplice 26466 194423 82632 0 3 0x82 nanoslp syz-executor.7 41041 22072 82632 0 2 0x2 syz-executor.5 53068 102819 82632 0 3 0x82 nanoslp syz-executor.4 85329 428325 82632 0 3 0x82 nanoslp syz-executor.1 83074 95752 82632 0 3 0x82 nanoslp syz-executor.0 82632 29101 3049 0 3 0x2000082 thrsleep syz-fuzzer 82632 193124 3049 0 3 0x6000082 thrsleep syz-fuzzer 82632 207222 3049 0 3 0x6000082 thrsleep syz-fuzzer 82632 321690 3049 0 3 0x6000082 wait syz-fuzzer 82632 94082 3049 0 3 0x6000082 wait syz-fuzzer 82632 132639 3049 0 3 0x6000082 wait syz-fuzzer 82632 154138 3049 0 3 0x6000082 kqread syz-fuzzer 82632 237213 3049 0 3 0x6000082 thrsleep syz-fuzzer 82632 137480 3049 0 3 0x6000082 thrsleep syz-fuzzer 82632 232491 3049 0 3 0x6000082 wait syz-fuzzer 82632 473381 3049 0 3 0x6000082 thrsleep syz-fuzzer 82632 57775 3049 0 3 0x6000082 wait syz-fuzzer 82632 140839 3049 0 3 0x6000082 wait syz-fuzzer 82632 126481 3049 0 3 0x6000082 wait syz-fuzzer 82632 347548 3049 0 3 0x6000082 wait syz-fuzzer 3049 498306 12340 0 3 0x10008a sigsusp ksh 12340 394748 50509 0 3 0x9a kqread sshd 29203 501773 1 0 3 0x100083 ttyin getty 50509 412873 1 0 3 0x88 kqread sshd 74206 141447 34764 74 3 0x1100092 bpf pflogd 34764 469118 1 0 3 0x80 netio pflogd 91322 74129 1766 73 3 0x1100090 kqread syslogd 1766 43921 1 0 3 0x100082 netio syslogd 49055 282408 1 0 3 0x100080 kqread resolvd 45825 315772 79496 77 3 0x100092 kqread dhcpleased 19125 113172 79496 77 3 0x100092 kqread dhcpleased 79496 321113 1 0 3 0x80 kqread dhcpleased 47823 232360 0 0 3 0x14200 bored smr 56189 66165 0 0 2 0x14200 zerothread 59762 102676 0 0 3 0x14200 aiodoned aiodoned 11326 70698 0 0 3 0x14200 syncer update 1230 159402 0 0 3 0x14200 cleaner cleaner 5863 29315 0 0 3 0x14200 reaper reaper 53698 177430 0 0 3 0x14200 pgdaemon pagedaemon 16896 163406 0 0 3 0x14200 bored viomb 1260 188574 0 0 3 0x40014200 acpi0 acpi0 52984 470670 0 0 3 0x40014200 idle1 7824 495448 0 0 3 0x14200 bored softnet3 24274 163790 0 0 3 0x14200 bored softnet2 73337 300883 0 0 3 0x14200 bored softnet1 52624 477426 0 0 3 0x14200 bored softnet0 42572 251134 0 0 3 0x14200 bored systqmp 30083 159672 0 0 3 0x14200 bored systq 97716 145135 0 0 3 0x40014200 bored softclock 39998 73443 0 0 3 0x40014200 idle0 1 282750 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82cd2d78) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 uvm_pmr_getpages+0xeac sys/uvm/uvm_pmemrange.c:1205 #4 uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910 #5 pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209 #6 pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716 #7 uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1056 #8 uvm_fault+0x154 sys/uvm/uvm_fault.c:608 #9 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #10 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #11 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8077f2c7e0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 pmap_enter+0x1c3 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:423 [inline] #3 pmap_enter+0x1c3 sys/arch/amd64/amd64/pmap.c:2710 #4 uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1056 #5 uvm_fault+0x154 sys/uvm/uvm_fault.c:608 #6 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82ce5ec8) #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 1637 (syz-executor.6) thread 0xffff8000211d9008 (155425) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c86138) #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 (0xffffffff82ce5ec8) #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 64535 (syz-executor.1) thread 0xffff8000212f0010 (316182) exclusive rwlock amaplk r = 0 (0xfffffd806abe0d68) #0 witness_lock+0x447 #1 uvm_fault_check+0x41a sys/uvm/uvm_fault.c:782 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #3 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8069916680) #0 witness_lock+0x447 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 6547K 6934K 78643K 14084 0 pcb 13 10K 12K 78643K 161 0 rtable 238 6K 7K 78643K 505 0 pf 32 9K 10K 78643K 108 0 ifaddr 45 15K 16K 78643K 92 0 ifgroup 55 2K 2K 78643K 156 0 sysctl 0 0K 0K 78643K 2 0 counters 60 35K 36K 78643K 118 0 ioctlops 0 0K 4K 78643K 1521 0 iov 0 0K 16K 78643K 98 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1346 84K 84K 78643K 2349 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 29 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 489 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 81K 78643K 2027 0 sigio 0 0K 0K 78643K 19 0 proc 70 91K 128K 78643K 736 0 subproc 104 6K 6K 78643K 156 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 1 0K 0K 78643K 85 0 in_multi 101 7K 7K 78643K 151 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 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 695 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 344 88K 103K 78643K 22055 0 UVM aobj 89 3K 3K 78643K 89 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 37 0 NDP 12 0K 2K 78643K 65 0 temp 74 5920K 6048K 78643K 22301 0 kqueue 12 18K 28K 78643K 168 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 94 0 91 1 0 1 1 0 8 0 rtentry 112 161 0 49 4 0 4 4 0 8 0 unpcb 144 4689 0 4674 17 13 4 11 0 8 3 syncache 304 38 0 38 3 2 1 1 0 8 1 tcpqe 32 782 0 782 4 3 1 1 0 8 1 tcpcb 808 882 0 857 23 16 7 10 0 8 3 arp 120 27 0 8 1 0 1 1 0 8 0 inpcb 368 1462 0 1432 27 16 11 15 0 8 6 nd6 136 38 0 13 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1256 11 0 11 1 0 1 1 0 8 1 pffrag 232 8 0 8 3 2 1 1 0 482 1 pffrnode 88 8 0 8 3 2 1 1 0 8 1 pffrent 40 19 0 19 3 2 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 80 0 46 1 0 1 1 0 8 0 pfstkey 128 80 0 46 2 0 2 2 0 8 0 pfstate 376 80 0 46 5 0 5 5 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 644 0 183 29 0 29 29 0 8 0 art_table 32 645 0 183 4 0 4 4 0 8 0 art_node 16 157 0 55 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 0 1 0 1 1 0 8 0 semapl 112 487 0 477 1 0 1 1 0 8 0 shmpl 112 86 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4092 0 2635 92 0 92 92 0 8 0 ffsino 272 4092 0 2635 98 0 98 98 0 8 0 nchpl 144 6867 0 5218 64 0 64 64 0 8 0 uvmvnodes 80 4854 0 0 100 0 100 100 0 8 0 vnodes 216 4854 0 0 270 0 270 270 0 8 0 namei 1024 23839 0 23839 2 1 1 2 0 8 1 percpumem 16 72 0 29 1 0 1 1 0 8 0 vmpool 696 10 0 10 2 2 0 1 0 8 0 kstatmem 264 82 0 58 2 0 2 2 0 8 0 scxspl 216 19916 0 19916 12 11 1 8 1 8 1 plimitpl 152 257 0 241 1 0 1 1 0 8 0 sigapl 424 2362 0 2294 9 1 8 8 0 8 0 futexpl 64 16256 0 16254 1 0 1 1 0 8 0 knotepl 120 357 0 0 11 0 11 11 0 8 0 kqueuepl 216 408 0 399 10 9 1 6 0 8 0 pipepl 320 428 0 400 13 7 6 8 0 8 3 fdescpl 496 2324 0 2294 5 1 4 5 0 8 0 filepl 152 16948 0 16705 35 20 15 23 0 8 5 lockfpl 104 798 0 796 2 1 1 2 0 8 0 lockfspl 48 268 0 266 1 0 1 1 0 8 0 sessionpl 144 28 0 11 1 0 1 1 0 8 0 pgrppl 48 106 0 89 1 0 1 1 0 8 0 ucredpl 104 2417 0 2405 1 0 1 1 0 8 0 zombiepl 144 2294 0 2294 1 0 1 1 0 8 1 processpl 1072 2362 0 2294 5 0 5 5 0 8 0 procpl 680 5809 0 5723 13 4 9 10 0 8 1 sosppl 168 13 0 13 3 3 0 1 0 8 0 sockpl 488 6254 0 6207 139 124 15 39 0 8 6 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 264 0 0 33 0 33 33 0 8 0 mtagpl 96 416 0 0 10 0 10 10 0 8 0 mbufpl 256 674 0 0 42 1 41 41 0 8 0 bufpl 288 7046 0 719 453 0 453 453 0 8 0 anonpl 24 384666 0 372593 127 19 108 108 0 186 17 amapchunkpl 152 70559 0 69747 56 13 43 44 0 158 8 amappl16 200 10267 0 9875 57 27 30 34 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 180 0 165 2 1 1 2 0 8 0 amappl13 176 15 0 14 1 0 1 1 0 8 0 amappl12 168 3055 0 3026 3 1 2 2 0 8 0 amappl11 160 95 0 81 1 0 1 1 0 8 0 amappl10 152 53 0 43 2 1 1 1 0 8 0 amappl9 144 225 0 224 1 0 1 1 0 8 0 amappl8 136 325 0 245 3 0 3 3 0 8 0 amappl7 128 77 0 63 2 0 2 2 0 8 0 amappl6 120 286 0 264 2 1 1 2 0 8 0 amappl5 112 256 0 243 1 0 1 1 0 8 0 amappl4 104 647 0 604 2 0 2 2 0 8 0 amappl3 96 14229 0 14151 4 1 3 3 0 8 0 amappl2 88 2626 0 2556 3 1 2 3 0 8 0 amappl1 80 17117 0 16566 23 10 13 23 0 8 0 amappl 88 21424 0 21206 6 0 6 6 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 88 0 0 2 0 2 2 0 8 0 uaddrrnd 24 2334 0 2304 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2334 0 2304 1 0 1 1 0 8 0 vmmpekpl 168 23594 0 23537 3 0 3 3 0 8 0 vmmpepl 168 160645 0 158306 142 24 118 122 0 357 10 vmsppl 464 2333 0 2304 5 1 4 5 0 8 0 rwobjpl 56 51904 0 45476 92 1 91 91 0 8 0 pdppl 4096 4675 0 4608 189 120 69 79 0 8 2 pvpl 32 893220 0 875239 342 62 280 340 0 265 109 pmappl 248 2333 0 2304 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1017 0 160 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(ffffffff82c26ff0) 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(ffffffff82ce5cc0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ce5cc0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(ffffffff82cd2be4,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 uvm_pmr_getpages(1,0,0,1,0,1,e365ea03765d0d3f,0) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207 uvm_pagealloc(fffffd8077f2c820,2652000,0,3) at uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910 pmap_get_ptp(fffffd8077f2c7d0,99491816000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209 pmap_enter(fffffd8077f2c7d0,99491816000,67a79000,3,21) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716 uvm_fault_upper(ffff800026f614f0,ffff800026f61528,ffff800026f613f0,0) at uvm_fault_upper+0x2af sys/uvm/uvm_fault.c:1056 uvm_fault(fffffd8069916588,99491816000,0,1) at uvm_fault+0x154 sys/uvm/uvm_fault.c:608 upageflttrap(ffff800026f61670,99491816000) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800026f61670) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7c1d871ab900, count: -14 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(ffff8000ffff62b0,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff62b0,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff62a0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000211d9008,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000211d9008,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000211d9008,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000211d9008,6,ffff800027b6d368) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000211d9008) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff800027b6d4a0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff800027b6d4a0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7fad1635fa0, count: -9