witness: lock order reversal: 1st 0xffffffff82c65f30 &sched_lock (&sched_lock) 2nd 0xffff800027b82f38 &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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800027b82f38,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800027b82f38,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800027b82f28) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021231808,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021231808,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021231808,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021231808,6,ffff8000246ed2b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021231808) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff8000246ed3f0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff8000246ed3f0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79352b2750, count: -9 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff8000246ecfc0 rbx 0x3 rdx 0xffff800000d031c0 rcx 0xffff800021231808 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff8000246ecf30 r9 0x8080808080808080 r10 0x9782e94dda868367 r11 0x8f03e86d833ff252 r12 0xfffffd8003a0d640 r13 0 r14 0xfffffd80039f8610 r15 0xfffffd80031cabc0 rip 0xffffffff8165630c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000246ecfb0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=386190 stat=onproc flags process=100010 proc=4002000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000212312b8,0xffff800021239550 process=0xffff800027b82e28 user=0xffff8000246e8000, vmspace=0xfffffd806bbd6588 estcpu=32, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45357 135587 39900 32767 2 0x10 syz-executor.4 45357 470432 39900 32767 3 0x4000090 fsleep syz-executor.4 63442 297225 99349 32767 2 0x10 syz-executor.6 63442 350050 99349 32767 3 0x4000090 fsleep syz-executor.6 62317 407233 13552 32767 3 0x90 nanoslp syz-executor.5 62317 358274 13552 32767 7 0x4000010 syz-executor.5 62317 10257 13552 32767 3 0x4000090 fsleep syz-executor.5 58106 91052 20563 32767 2 0x10 syz-executor.3 58106 101293 20563 32767 3 0x4000090 fsleep syz-executor.3 54208 69791 85420 32767 3 0x90 nanoslp syz-executor.1 54208 350545 85420 32767 3 0x4000090 ttyout syz-executor.1 54208 518221 85420 32767 3 0x4000090 fsleep syz-executor.1 23933 8441 59051 32767 3 0x90 nanoslp syz-executor.7 23933 463470 59051 32767 3 0x4000090 fsleep syz-executor.7 23933 437071 59051 32767 3 0x4000090 fsleep syz-executor.7 81842 140110 77266 32767 4 0x182010 syz-executor.0 *81842 386190 77266 32767 7 0x4102010 syz-executor.0 77266 44428 32854 32767 2 0x10 syz-executor.0 32854 43286 40613 0 3 0x82 wait syz-executor.0 59051 388970 63137 32767 2 0x10 syz-executor.7 63137 42010 40613 0 3 0x82 wait syz-executor.7 20563 264331 24696 32767 3 0x90 nanoslp syz-executor.3 24696 10816 40613 0 3 0x82 wait syz-executor.3 13552 488800 70281 32767 3 0x90 nanoslp syz-executor.5 70281 276874 40613 0 3 0x82 wait syz-executor.5 85420 444343 7417 32767 2 0x10 syz-executor.1 7417 121268 40613 0 3 0x82 wait syz-executor.1 99349 228390 12295 32767 3 0x90 nanoslp syz-executor.6 12295 131098 40613 0 3 0x82 wait syz-executor.6 39362 432491 0 0 3 0x14200 bored sosplice 77904 83533 78094 32767 3 0x90 nanoslp syz-executor.2 78094 444551 40613 0 3 0x82 wait syz-executor.2 39900 205884 29994 32767 3 0x90 nanoslp syz-executor.4 29994 36589 40613 0 3 0x82 wait syz-executor.4 40613 159590 24175 0 3 0x2000082 thrsleep syz-fuzzer 40613 289718 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 239968 24175 0 3 0x6000082 wait syz-fuzzer 40613 499693 24175 0 3 0x6000082 wait syz-fuzzer 40613 519753 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 209498 24175 0 3 0x6000082 wait syz-fuzzer 40613 313487 24175 0 3 0x6000082 wait syz-fuzzer 40613 275152 24175 0 3 0x6000082 wait syz-fuzzer 40613 498860 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 177244 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 17887 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 333719 24175 0 3 0x6000082 wait syz-fuzzer 40613 20225 24175 0 3 0x6000082 thrsleep syz-fuzzer 40613 158366 24175 0 3 0x6000082 wait syz-fuzzer 40613 173731 24175 0 3 0x6000082 kqread syz-fuzzer 40613 182759 24175 0 3 0x6000082 wait syz-fuzzer 24175 286718 72332 0 3 0x10008a sigsusp ksh 72332 443329 80427 0 3 0x9a kqread sshd 11008 360707 1 0 3 0x100083 ttyin getty 80427 387442 1 0 3 0x88 kqread sshd 87199 998 58698 73 3 0x1100090 kqread syslogd 58698 357989 1 0 3 0x100082 netio syslogd 52519 50853 1 0 3 0x100080 kqread resolvd 18557 161011 15821 77 3 0x100092 kqread dhcpleased 83058 520617 15821 77 3 0x100092 kqread dhcpleased 15821 147313 1 0 3 0x80 kqread dhcpleased 41515 192720 0 0 3 0x14200 bored smr 57789 298969 0 0 2 0x14200 zerothread 83681 503166 0 0 3 0x14200 aiodoned aiodoned 53024 490692 0 0 3 0x14200 syncer update 22075 120853 0 0 3 0x14200 cleaner cleaner 1943 168907 0 0 3 0x14200 reaper reaper 77499 514673 0 0 3 0x14200 pgdaemon pagedaemon 87047 171003 0 0 3 0x14200 bored viomb 61780 211374 0 0 3 0x40014200 acpi0 acpi0 8988 437539 0 0 3 0x40014200 idle1 21018 183590 0 0 3 0x14200 bored softnet3 28145 296483 0 0 3 0x14200 bored softnet2 5997 352653 0 0 3 0x14200 bored softnet1 65113 392273 0 0 3 0x14200 bored softnet0 20488 488685 0 0 3 0x14200 bored systqmp 76094 244589 0 0 3 0x14200 bored systq 2873 301435 0 0 3 0x40014200 bored softclock 30595 248676 0 0 3 0x40014200 idle0 1 125448 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82c65f30) #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 CPU 1: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82d03148) #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 uvm_fault_lower+0x1ab #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 Process 62317 (syz-executor.5) thread 0xffff8000211d82c0 (358274) exclusive rwlock amaplk r = 0 (0xfffffd806a2ca828) #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 (0xfffffd806f14f670) #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 81842 (syz-executor.0) thread 0xffff800021231808 (386190) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d03430) #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 (0xffffffff82c65f30) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 6411K 6420K 78643K 11364 0 pcb 13 16K 18K 78643K 19 0 rtable 242 6K 7K 78643K 1667 0 pf 29 8K 8K 78643K 81 0 ifaddr 44 15K 16K 78643K 154 0 ifgroup 50 2K 2K 78643K 154 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 112 0 ioctlops 0 0K 2K 78643K 205 0 iov 0 0K 18K 78643K 1571 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 3896 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 3 5K 9K 78643K 273 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1341 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 121K 78643K 16853 0 sigio 1 0K 0K 78643K 4278 0 proc 56 78K 115K 78643K 2380 0 subproc 104 6K 6K 78643K 442 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 22320 0 in_multi 99 7K 7K 78643K 558 0 ether_multi 1 0K 0K 78643K 18 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 181 811K 811K 78643K 181 0 exec 0 0K 1K 78643K 2372 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 490 97K 114K 78643K 169024 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 349 0 NDP 11 0K 2K 78643K 105 0 temp 74 5920K 6048K 78643K 43711 0 kqueue 13 20K 44K 78643K 1607 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 1354 0 1351 19 18 1 5 0 8 0 rtentry 112 420 0 306 4 0 4 4 0 8 0 unpcb 144 10249 0 10233 126 120 6 8 0 8 5 syncache 304 177 0 177 30 30 0 1 0 8 0 tcpqe 32 460 0 460 25 25 0 1 0 8 0 tcpcb 808 39207 0 39194 755 739 16 35 0 8 13 arp 120 72 0 54 1 0 1 1 0 8 0 ipq 40 23 0 22 10 9 1 1 0 8 0 ipqe 40 88 0 87 10 9 1 1 0 8 0 inpcb 368 43840 0 43824 624 612 12 32 0 8 8 nd6 136 123 0 95 3 1 2 2 0 8 0 kcovpl 48 34 0 26 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1678 0 1213 32 2 30 30 0 8 0 art_table 32 1679 0 1213 4 0 4 4 0 8 0 art_node 16 419 0 315 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 1339 0 1329 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 22830 0 21386 91 0 91 91 0 8 0 ffsino 272 22830 0 21386 97 0 97 97 0 8 0 nchpl 144 44514 0 42865 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 142537 0 142537 12 11 1 2 0 8 1 percpumem 16 69 0 26 1 0 1 1 0 8 0 kstatmem 264 74 0 52 2 0 2 2 0 8 0 scxspl 216 137951 0 137951 54 50 4 8 1 8 4 plimitpl 152 2289 0 2265 19 18 1 2 0 8 0 sigapl 424 17095 0 17040 7 0 7 7 0 8 0 futexpl 64 154135 0 154128 8 7 1 1 0 8 0 knotepl 120 1257 0 0 17 2 15 17 0 8 0 kqueuepl 216 3755 0 3746 75 74 1 14 0 8 0 pipepl 320 7162 0 7133 134 126 8 13 0 8 5 fdescpl 496 17077 0 17041 7 1 6 6 0 8 0 filepl 152 130504 0 130261 208 188 20 24 0 8 7 lockfpl 104 2587 0 2585 2 1 1 2 0 8 0 lockfspl 48 931 0 929 1 0 1 1 0 8 0 sessionpl 144 49 0 33 1 0 1 1 0 8 0 pgrppl 48 254 0 238 1 0 1 1 0 8 0 ucredpl 104 13593 0 13575 1 0 1 1 0 8 0 zombiepl 144 17041 0 17040 2 1 1 1 0 8 0 processpl 1072 17095 0 17040 5 1 4 5 0 8 0 procpl 680 47386 0 47306 38 30 8 9 0 8 1 sosppl 168 213 0 213 20 19 1 1 0 8 1 sockpl 488 56021 0 55986 1193 1164 29 46 0 8 22 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 37 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 42 0 0 4 0 4 4 0 8 1 mcl2k2 2112 22 0 0 2 0 2 2 0 8 0 mcl2k 2048 381 0 0 32 14 18 32 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1803 0 0 74 0 74 74 0 8 0 bufpl 288 30003 0 23678 455 2 453 453 0 8 0 anonpl 24 1828237 0 1816516 234 137 97 119 0 186 0 amapchunkpl 152 550381 0 549420 198 145 53 53 0 158 14 amappl16 200 43066 0 42767 308 291 17 41 0 8 0 amappl15 192 10 0 10 2 2 0 1 0 8 0 amappl14 184 235 0 221 2 1 1 2 0 8 0 amappl13 176 19 0 19 4 4 0 1 0 8 0 amappl12 168 18091 0 18051 2 0 2 2 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 50 0 39 1 0 1 1 0 8 0 amappl9 144 348 0 348 31 30 1 1 0 8 1 amappl8 136 834 0 631 9 1 8 8 0 8 0 amappl7 128 138 0 123 2 0 2 2 0 8 0 amappl6 120 588 0 562 2 1 1 2 0 8 0 amappl5 112 684 0 673 1 0 1 1 0 8 0 amappl4 104 1038 0 995 2 0 2 2 0 8 0 amappl3 96 103991 0 103883 8 5 3 4 0 8 0 amappl2 88 18195 0 18111 3 1 2 3 0 8 0 amappl1 80 68738 0 68200 22 9 13 22 0 8 0 amappl 88 167618 0 167331 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 17077 0 17041 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17077 0 17041 1 0 1 1 0 8 0 vmmpekpl 168 147565 0 147501 4 0 4 4 0 8 0 vmmpepl 168 1005848 0 1003232 324 205 119 132 0 357 0 vmsppl 464 17076 0 17041 7 2 5 6 0 8 0 rwobjpl 56 258934 0 251388 131 21 110 112 0 8 0 pdppl 4096 34162 0 34082 580 498 82 94 0 8 2 pvpl 32 5059283 0 5040836 560 386 174 360 0 265 0 pmappl 248 17076 0 17041 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2812 0 1912 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800027b82f38,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800027b82f38,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800027b82f28) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021231808,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021231808,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021231808,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021231808,6,ffff8000246ed2b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021231808) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff8000246ed3f0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff8000246ed3f0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79352b2750, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d58ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82c65d28) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c65d28) at __mp_lock+0x133 sys/kern/kern_lock.c:147 wakeup_n(ffffffff82d02fb4,ffffffff) at wakeup_n+0x37 sys/kern/kern_synch.c:541 uvm_pmr_getpages(1,0,0,1,0,1,8063cd0fbccfc41,fffffd8066f0a6f0) at uvm_pmr_getpages+0xeef sys/uvm/uvm_pmemrange.c:1207 uvm_pagealloc(0,0,fffffd8066f0a6f0,2) at uvm_pagealloc+0x1a8 sys/uvm/uvm_page.c:910 uvm_fault_lower(ffff80002e477b30,ffff80002e477b68,ffff80002e477ab0,0) at uvm_fault_lower+0x1ab uvm_fault(fffffd806f14f578,37fa4bf4000,0,2) at uvm_fault+0x238 upageflttrap(ffff80002e477cb0,37fa4bf4000) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002e477cb0) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x37f81066340, count: -13