witness: lock order reversal: 1st 0xffffffff82cc8bd0 &sched_lock (&sched_lock) 2nd 0xffff8000ffff8da8 &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(ffff8000ffff8da8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff8da8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff8d98) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000212382a8,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000212382a8,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000212382a8,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000212382a8,6,ffff80002e449bd8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000212382a8) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e449d10) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e449d10) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c97a67e690, count: -9 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff80002e4498e0 rbx 0x3 rdx 0xffff800000cef100 rcx 0xffff8000212382a8 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff80002e449850 r9 0x8080808080808080 r10 0x7be5eb9e95b70f35 r11 0xcc926e63e231039e r12 0xfffffd8003a0a590 r13 0 r14 0xfffffd80039f61c0 r15 0xfffffd80031c7bc0 rip 0xffffffff81b6e27c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e4498d0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=124002 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000212a1d40,0xffff800021238808 process=0xffff8000ffff8c98 user=0xffff80002e444000, vmspace=0xfffffd8066235938 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30861 300691 6347 32767 7 0x10 syz-executor.6 17681 375669 17598 32767 2 0x10 syz-executor.2 17681 293268 17598 32767 2 0x4000010 syz-executor.2 29277 399346 69740 32767 2 0x10 syz-executor.4 29277 42978 69740 32767 2 0x4000010 syz-executor.4 29277 83897 69740 32767 2 0x4000010 syz-executor.4 20828 341147 50968 32767 2 0x10 syz-executor.0 20828 215798 50968 32767 3 0x4000090 netio syz-executor.0 86543 143656 14357 32767 4 0x582010 syz-executor.1 *86543 124002 14357 32767 7 0x4502010 syz-executor.1 79818 478654 35887 32767 2 0x10 syz-executor.3 79818 209437 35887 32767 3 0x4000090 fsleep syz-executor.3 18505 34513 98136 32767 2 0x10 syz-executor.5 18505 404689 98136 32767 3 0x4000090 fsleep syz-executor.5 69740 439610 28430 32767 2 0x10 syz-executor.4 28430 405205 25193 0 3 0x82 wait syz-executor.4 14357 14158 44224 32767 3 0x90 nanoslp syz-executor.1 44224 77079 25193 0 3 0x82 wait syz-executor.1 17598 478820 12848 32767 3 0x90 nanoslp syz-executor.2 12848 77639 25193 0 3 0x82 wait syz-executor.2 6347 413628 16528 32767 3 0x90 nanoslp syz-executor.6 16528 153349 25193 0 3 0x82 wait syz-executor.6 50968 315879 92091 32767 3 0x90 nanoslp syz-executor.0 92091 264361 25193 0 3 0x82 wait syz-executor.0 28570 168428 0 0 3 0x14200 bored sosplice 98136 91221 81437 32767 3 0x90 nanoslp syz-executor.5 9099 185615 57205 32767 2 0x10 syz-executor.7 57205 64098 25193 0 3 0x82 wait syz-executor.7 81437 27185 25193 0 3 0x82 wait syz-executor.5 35887 4520 29780 32767 2 0x10 syz-executor.3 29780 428198 25193 0 3 0x82 wait syz-executor.3 25193 401127 53605 0 3 0x2000082 thrsleep syz-fuzzer 25193 134059 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 379598 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 452197 53605 0 3 0x6000082 wait syz-fuzzer 25193 411323 53605 0 3 0x6000082 wait syz-fuzzer 25193 107328 53605 0 3 0x6000082 wait syz-fuzzer 25193 199085 53605 0 3 0x6000082 wait syz-fuzzer 25193 59000 53605 0 3 0x6000082 kqread syz-fuzzer 25193 461024 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 218324 53605 0 3 0x6000082 wait syz-fuzzer 25193 213144 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 484803 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 78208 53605 0 3 0x6000082 wait syz-fuzzer 25193 41912 53605 0 3 0x6000082 thrsleep syz-fuzzer 25193 82771 53605 0 3 0x6000082 wait syz-fuzzer 25193 342247 53605 0 3 0x6000082 wait syz-fuzzer 53605 372113 32537 0 3 0x10008a sigsusp ksh 32537 130760 90091 0 3 0x9a kqread sshd 55230 92638 1 0 3 0x100083 ttyin getty 90091 44990 1 0 3 0x88 kqread sshd 9429 307413 4782 73 3 0x1100090 kqread syslogd 4782 520021 1 0 3 0x100082 netio syslogd 91692 284354 1 0 3 0x100080 kqread resolvd 89764 23250 46447 77 3 0x100092 kqread dhcpleased 6788 235002 46447 77 3 0x100092 kqread dhcpleased 46447 232652 1 0 3 0x80 kqread dhcpleased 65167 458366 0 0 3 0x14200 bored smr 39570 482951 0 0 2 0x14200 zerothread 81419 218819 0 0 3 0x14200 aiodoned aiodoned 3502 197745 0 0 3 0x14200 syncer update 73802 136621 0 0 3 0x14200 cleaner cleaner 19318 386350 0 0 3 0x14200 reaper reaper 92386 141109 0 0 3 0x14200 pgdaemon pagedaemon 21959 478269 0 0 3 0x14200 bored viomb 72739 513672 0 0 3 0x40014200 acpi0 acpi0 85741 268573 0 0 3 0x40014200 idle1 7352 229170 0 0 3 0x14200 bored softnet3 66266 108047 0 0 3 0x14200 bored softnet2 60216 403002 0 0 3 0x14200 bored softnet1 21252 148626 0 0 3 0x14200 bored softnet0 40521 135122 0 0 3 0x14200 bored systqmp 15378 298951 0 0 3 0x14200 bored systq 9600 155897 0 0 3 0x40014200 bored softclock 23430 490897 0 0 3 0x40014200 idle0 1 250216 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 (0xffffffff82cc9298) #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_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1192 #8 uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 #9 uvm_fault+0x238 #10 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #11 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #12 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806ba90bc0) #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_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1192 #5 uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 #6 uvm_fault+0x238 #7 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 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 30861 (syz-executor.6) thread 0xffff800021238550 (300691) exclusive rwlock uobjlk r = 0 (0xfffffd806e8d8630) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 uvm_fault_lower_lookup+0x4a sys/uvm/uvm_fault.c:1126 #3 uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 #4 uvm_fault+0x238 #5 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8071bacbf8) #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 Process 86543 (syz-executor.1) thread 0xffff8000212382a8 (124002) 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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 6413K 6420K 78643K 11335 0 pcb 13 12K 14K 78643K 17 0 rtable 246 7K 7K 78643K 859 0 pf 29 8K 8K 78643K 49 0 ifaddr 44 15K 15K 78643K 88 0 ifgroup 50 2K 2K 78643K 90 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 80 0 ioctlops 0 0K 2K 78643K 169 0 iov 0 0K 32K 78643K 1058 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 6099 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 134 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1362 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 113K 78643K 9456 0 sigio 0 0K 0K 78643K 108 0 proc 56 78K 103K 78643K 1346 0 subproc 104 6K 6K 78643K 234 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 359 0 in_multi 99 7K 7K 78643K 287 0 ether_multi 1 0K 0K 78643K 10 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 289 1288K 1288K 78643K 289 0 exec 0 0K 1K 78643K 2111 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 445 94K 113K 78643K 95214 0 UVM aobj 131 4K 4K 78643K 146 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 242 0 NDP 11 0K 2K 78643K 57 0 temp 74 5920K 6000K 78643K 26029 0 kqueue 12 18K 28K 78643K 1039 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 120 480 0 477 9 8 1 5 0 8 0 rtentry 112 240 0 124 4 0 4 4 0 8 0 unpcb 144 4598 0 4578 48 47 1 7 0 8 0 syncache 304 116 0 116 24 23 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 310 0 310 17 16 1 1 0 8 1 tcpcb 808 3480 0 3454 118 108 10 16 0 8 6 arp 120 40 0 21 1 0 1 1 0 8 0 ipq 40 8 0 8 4 4 0 1 0 8 0 ipqe 40 86 0 86 4 4 0 1 0 8 0 inpcb 368 8865 0 8832 148 139 9 15 0 8 5 nd6 136 71 0 42 2 0 2 2 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 964 0 497 32 2 30 30 0 8 0 art_table 32 965 0 497 4 0 4 4 0 8 0 art_node 16 239 0 133 1 0 1 1 0 8 0 semapl 112 1360 0 1350 1 0 1 1 0 8 0 shmpl 112 143 0 15 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17065 0 15622 91 0 91 91 0 8 0 ffsino 272 17065 0 15622 97 0 97 97 0 8 0 nchpl 144 30691 0 29049 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 111010 0 111010 3 2 1 2 0 8 1 percpumem 16 53 0 10 1 0 1 1 0 8 0 kstatmem 264 42 0 20 2 0 2 2 0 8 0 scxspl 216 77267 0 77267 36 35 1 8 1 8 1 plimitpl 152 1310 0 1287 10 9 1 2 0 8 0 sigapl 424 9729 0 9675 7 0 7 7 0 8 0 futexpl 64 81386 0 81384 2 1 1 1 0 8 0 knotepl 120 774 0 0 13 2 11 11 0 8 0 kqueuepl 216 5327 0 5319 57 56 1 5 0 8 0 pipepl 320 1860 0 1831 56 53 3 13 0 8 0 fdescpl 496 9711 0 9675 7 2 5 6 0 8 0 filepl 152 75201 0 74957 123 111 12 19 0 8 1 lockfpl 104 1142 0 1140 2 1 1 2 0 8 0 lockfspl 48 354 0 352 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 221 0 205 1 0 1 1 0 8 0 ucredpl 104 24747 0 24729 1 0 1 1 0 8 0 zombiepl 144 9675 0 9675 1 0 1 1 0 8 1 processpl 1072 9729 0 9675 4 0 4 4 0 8 0 procpl 680 26553 0 26477 9 1 8 8 0 8 0 sosppl 168 151 0 151 13 12 1 1 0 8 1 sockpl 488 14337 0 14284 276 261 15 26 0 8 7 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 33 0 0 4 0 4 4 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 416 0 0 41 20 21 41 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 2191 0 0 106 0 106 106 0 8 0 bufpl 288 17552 0 11226 453 0 453 453 0 8 0 anonpl 24 964638 0 952967 183 100 83 101 0 186 0 amapchunkpl 152 300500 0 299579 103 62 41 48 0 158 2 amappl16 200 20011 0 19692 108 89 19 31 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 197 0 180 2 1 1 2 0 8 0 amappl13 176 24 0 24 6 6 0 1 0 8 0 amappl12 168 10496 0 10459 2 0 2 2 0 8 0 amappl11 160 56 0 45 1 0 1 1 0 8 0 amappl10 152 37 0 27 1 0 1 1 0 8 0 amappl9 144 314 0 313 1 0 1 1 0 8 0 amappl8 136 544 0 398 6 0 6 6 0 8 0 amappl7 128 122 0 105 2 0 2 2 0 8 0 amappl6 120 375 0 355 2 1 1 2 0 8 0 amappl5 112 405 0 396 1 0 1 1 0 8 0 amappl4 104 795 0 752 2 0 2 2 0 8 0 amappl3 96 58929 0 58833 4 1 3 4 0 8 0 amappl2 88 10457 0 10376 3 1 2 3 0 8 0 amappl1 80 42240 0 41703 22 10 12 22 0 8 0 amappl 88 94280 0 94016 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 72 145 0 15 3 0 3 3 0 8 0 uaddrrnd 24 9711 0 9675 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9711 0 9675 1 0 1 1 0 8 0 vmmpekpl 168 76183 0 76119 4 0 4 4 0 8 0 vmmpepl 168 572041 0 569505 235 120 115 126 0 357 2 vmsppl 464 9710 0 9675 7 2 5 6 0 8 0 rwobjpl 56 147849 0 140366 114 6 108 110 0 8 0 pdppl 4096 19430 0 19350 396 314 82 90 0 8 2 pvpl 32 2739936 0 2721883 519 365 154 354 0 265 3 pmappl 248 9710 0 9675 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1516 0 590 27 0 27 27 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(ffffffff82cc89c8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cc89c8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(ffffffff82cc9104,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 uvm_pmr_getpages(1,0,0,1,0,1,885e50a5bcbc98a5,0) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207 uvm_pagealloc(fffffd806ba90c20,1d000,0,3) at uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910 pmap_get_ptp(fffffd806ba90bb0,ebfc6ff1000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1209 pmap_enter(fffffd806ba90bb0,ebfc6ff1000,6201f000,4,20) at pmap_enter+0x2be sys/arch/amd64/amd64/pmap.c:2716 uvm_fault_lower_lookup(ffff80002e467110,ffff80002e467148,ffff80002e467090) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff80002e467110,ffff80002e467148,ffff80002e467090,0) at uvm_fault_lower+0x63 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8071bacb00,ebfc6ff4000,0,4) at uvm_fault+0x238 upageflttrap(ffff80002e467290,ebfc6ff4c9b) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002e467290) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x76071a1ec3d0, count: -15 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(ffff8000ffff8da8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000ffff8da8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000ffff8d98) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff8000212382a8,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff8000212382a8,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff8000212382a8,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff8000212382a8,6,ffff80002e449bd8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff8000212382a8) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e449d10) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e449d10) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8c97a67e690, count: -9