witness: lock order reversal: 1st 0xffffffff82c65f30 &sched_lock (&sched_lock) 2nd 0xffff800027b9fbc8 &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(ffff800027b9fbc8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800027b9fbc8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800027b9fbb8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021295d40,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021295d40,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021295d40,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021295d40,6,ffff80002b0099b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021295d40) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002b009af0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002b009af0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac8974b2560, count: -9 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff80002b0096c0 rbx 0x3 rdx 0xffff800000cf96c0 rcx 0xffff800021295d40 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff80002b009630 r9 0x8080808080808080 r10 0x106aed1735d84c16 r11 0x2bebc95c17573a0b r12 0xfffffd8003a0d640 r13 0 r14 0xfffffd8003a04530 r15 0xfffffd80031cabc0 rip 0xffffffff8165630c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002b0096b0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=358745 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=61, nice=20 forw=0xffffffffffffffff, list=0xffff8000212952a0,0xffff800021294568 process=0xffff800027b9fab8 user=0xffff80002b004000, vmspace=0xfffffd806736f028 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85503 103968 45055 32767 2 0x10 syz-executor.1 79084 207353 44190 32767 4 0x582010 syz-executor.2 *79084 358745 44190 32767 7 0x4502010 syz-executor.2 97394 112533 53115 32767 7 0x10 syz-executor.3 97394 42046 53115 32767 3 0x4000090 fsleep syz-executor.3 49965 39751 65093 32767 2 0x10 syz-executor.6 87925 94802 2938 32767 2 0x10 syz-executor.5 87925 349611 2938 32767 3 0x4000090 lockf syz-executor.5 87925 137976 2938 32767 3 0x4000090 msgwait syz-executor.5 87925 208215 2938 32767 2 0x4000010 syz-executor.5 40770 474476 0 0 3 0x14200 bored sosplice 48622 494909 8450 32767 2 0x10 syz-executor.7 65093 209771 6707 32767 3 0x90 nanoslp syz-executor.6 53115 505948 93017 32767 3 0x90 nanoslp syz-executor.3 6707 31054 64402 0 3 0x82 wait syz-executor.6 2938 380622 90811 32767 3 0x90 nanoslp syz-executor.5 8450 335270 64402 0 3 0x82 wait syz-executor.7 93017 22304 64402 0 3 0x82 wait syz-executor.3 45055 47618 4234 32767 3 0x90 nanoslp syz-executor.1 90811 408135 64402 0 3 0x82 wait syz-executor.5 9555 370299 63539 32767 3 0x10 biowait syz-executor.4 63539 183449 64402 0 3 0x82 wait syz-executor.4 44190 94 83114 32767 3 0x90 nanoslp syz-executor.2 4234 270460 64402 0 3 0x82 wait syz-executor.1 83114 242776 64402 0 3 0x82 wait syz-executor.2 27967 137086 123 32767 3 0x10 biowait syz-executor.0 123 355243 64402 0 3 0x82 wait syz-executor.0 64402 21727 78040 0 3 0x2000082 wait syz-fuzzer 64402 108935 78040 0 3 0x6000082 nanoslp syz-fuzzer 64402 376998 78040 0 3 0x6000082 wait syz-fuzzer 64402 288313 78040 0 3 0x6000082 wait syz-fuzzer 64402 490710 78040 0 3 0x6000082 wait syz-fuzzer 64402 208581 78040 0 3 0x6000082 thrsleep syz-fuzzer 64402 410755 78040 0 3 0x6000082 wait syz-fuzzer 64402 82641 78040 0 3 0x6000082 thrsleep syz-fuzzer 64402 8524 78040 0 3 0x6000082 wait syz-fuzzer 64402 465924 78040 0 3 0x6000082 wait syz-fuzzer 64402 38250 78040 0 3 0x6000082 thrsleep syz-fuzzer 64402 483766 78040 0 3 0x6000082 thrsleep syz-fuzzer 64402 166770 78040 0 3 0x6000082 wait syz-fuzzer 64402 450846 78040 0 3 0x6000082 kqread syz-fuzzer 64402 410305 78040 0 3 0x6000082 thrsleep syz-fuzzer 78040 346734 33327 0 3 0x10008a sigsusp ksh 33327 240268 59978 0 3 0x9a kqread sshd 76795 24744 1 0 3 0x100083 ttyin getty 59978 125916 1 0 3 0x88 kqread sshd 82685 211981 18361 73 3 0x1100090 kqread syslogd 18361 469156 1 0 3 0x100082 netio syslogd 71105 476305 1 0 3 0x100080 kqread resolvd 33882 508546 90905 77 3 0x100092 kqread dhcpleased 5994 57983 90905 77 3 0x100092 kqread dhcpleased 90905 123672 1 0 3 0x80 kqread dhcpleased 48347 97093 0 0 3 0x14200 bored smr 72628 501117 0 0 2 0x14200 zerothread 5043 7429 0 0 3 0x14200 aiodoned aiodoned 55939 484446 0 0 3 0x14200 syncer update 17698 388958 0 0 3 0x14200 cleaner cleaner 11396 334232 0 0 3 0x14200 reaper reaper 24782 81016 0 0 3 0x14200 pgdaemon pagedaemon 10642 342955 0 0 3 0x14200 bored viomb 30082 452312 0 0 3 0x40014200 acpi0 acpi0 42320 203141 0 0 3 0x40014200 idle1 14310 307799 0 0 3 0x14200 bored softnet3 71220 174989 0 0 3 0x14200 bored softnet2 53376 351078 0 0 3 0x14200 bored softnet1 99170 215530 0 0 3 0x14200 bored softnet0 58219 447458 0 0 3 0x14200 bored systqmp 63734 412348 0 0 3 0x14200 bored systq 68655 357819 0 0 3 0x40014200 bored softclock 68883 322327 0 0 3 0x40014200 idle0 1 155314 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 (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 Process 79084 (syz-executor.2) thread 0xffff800021295d40 (358745) 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 Process 97394 (syz-executor.3) thread 0xffff800021294008 (112533) exclusive rwlock amaplk r = 0 (0xfffffd806bb90828) #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 (0xfffffd806736fc00) #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 9555 (syz-executor.4) thread 0xffff8000212622c8 (370299) exclusive rrwlock inode r = 0 (0xfffffd8063f86708) #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_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80676a13d0) #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 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #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 27967 (syz-executor.0) thread 0xffff8000211ee010 (137086) exclusive rrwlock inode r = 0 (0xfffffd8063f86928) #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_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069c88d58) #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 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #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 11266 0 pcb 13 8K 8K 78643K 13 0 rtable 234 6K 6K 78643K 350 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 32 0 iov 0 0K 4K 78643K 9 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1485 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 3 0K 0K 78643K 3 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 125K 78643K 247 0 proc 56 78K 103K 78643K 480 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 1 0 in_multi 99 7K 7K 78643K 99 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 364 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 323 83K 84K 78643K 4460 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 11 0K 2K 78643K 27 0 temp 40 5907K 5971K 78643K 4290 0 kqueue 12 18K 22K 78643K 29 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 37 0 33 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 56 0 41 1 0 1 1 0 8 0 syncache 304 7 0 7 2 1 1 1 0 8 1 tcpqe 32 152 0 152 2 1 1 1 0 8 1 tcpcb 808 30 0 23 2 0 2 2 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 108 0 98 2 0 2 2 0 8 0 nd6 136 24 0 0 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 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1801 0 363 91 0 91 91 0 8 0 ffsino 272 1801 0 363 97 0 97 97 0 8 0 nchpl 144 2201 0 524 63 0 63 63 0 8 0 uvmvnodes 80 1914 0 0 40 0 40 40 0 8 0 vnodes 216 1914 0 0 107 0 107 107 0 8 0 namei 1024 8342 0 8340 2 0 2 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 7080 0 7078 3 2 1 2 1 8 0 plimitpl 152 47 0 24 1 0 1 1 0 8 0 sigapl 424 540 0 488 7 0 7 7 0 8 0 futexpl 64 1128 0 1127 1 0 1 1 0 8 0 knotepl 120 108 0 0 4 0 4 4 0 8 0 kqueuepl 216 30 0 22 1 0 1 1 0 8 0 pipepl 320 192 0 164 6 0 6 6 0 8 3 fdescpl 496 522 0 488 7 1 6 6 0 8 1 filepl 152 3284 0 3045 15 0 15 15 0 8 5 lockfpl 104 30 0 25 1 0 1 1 0 8 0 lockfspl 48 12 0 8 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 104 780 0 762 1 0 1 1 0 8 0 zombiepl 144 488 0 488 1 0 1 1 0 8 1 processpl 1072 540 0 488 5 0 5 5 0 8 1 procpl 680 765 0 694 7 0 7 7 0 8 0 sosppl 168 3 0 1 1 0 1 1 0 8 0 sockpl 488 201 0 172 5 0 5 5 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k 2048 252 0 0 32 0 32 32 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 18 0 18 18 0 8 0 bufpl 288 4233 0 137 293 0 293 293 0 8 0 anonpl 24 188818 0 178438 66 2 64 64 0 186 1 amapchunkpl 152 14611 0 13761 38 0 38 38 0 158 4 amappl16 200 5060 0 4803 15 1 14 14 0 8 0 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 141 0 130 2 0 2 2 0 8 1 amappl13 176 27 0 26 1 0 1 1 0 8 0 amappl12 168 1139 0 1105 2 0 2 2 0 8 0 amappl11 160 50 0 38 1 0 1 1 0 8 0 amappl10 152 19 0 10 1 0 1 1 0 8 0 amappl9 144 197 0 196 1 0 1 1 0 8 0 amappl8 136 194 0 149 2 0 2 2 0 8 0 amappl7 128 62 0 50 2 0 2 2 0 8 0 amappl6 120 219 0 203 1 0 1 1 0 8 0 amappl5 112 181 0 172 1 0 1 1 0 8 0 amappl4 104 527 0 493 2 0 2 2 0 8 0 amappl3 96 3351 0 3261 3 0 3 3 0 8 0 amappl2 88 755 0 688 3 0 3 3 0 8 1 amappl1 80 10210 0 9684 22 3 19 22 0 8 6 amappl 88 3961 0 3728 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 522 0 488 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 522 0 488 1 0 1 1 0 8 0 vmmpekpl 168 10153 0 10086 4 0 4 4 0 8 0 vmmpepl 168 52911 0 50695 119 0 119 119 0 357 18 vmsppl 464 521 0 488 7 1 6 6 0 8 1 rwobjpl 56 22102 0 18952 48 3 45 45 0 8 0 pdppl 4096 1052 0 976 120 38 82 96 0 8 6 pvpl 32 413990 0 397754 338 4 334 336 0 265 199 pmappl 248 521 0 488 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 706 0 40 20 0 20 20 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bc3ff0) 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(ffffffff82d03228) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d03228) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002472f5c0,ffff800000069c00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __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(ffffffff82d03228) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d03228) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff80002472f720,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d03228) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d03228) at __mp_lock+0x133 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 pmap_extract(fffffd806bd928b8,b5954240000,ffff80002472f980) at pmap_extract+0x1c8 sys/arch/amd64/amd64/pmap.c:1550 uvm_fault_upper_lookup(ffff80002472fb20,ffff80002472fb58,ffff80002472fa20,ffff80002472faa0) at uvm_fault_upper_lookup+0x139 sys/uvm/uvm_fault.c:860 uvm_fault(fffffd806736fb08,b5954243000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff80002472fca0,b59542436d8) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002472fca0) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x77fa9f3d42c0, count: -20 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(ffff800027b9fbc8,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800027b9fbc8,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800027b9fbb8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021295d40,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021295d40,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021295d40,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021295d40,6,ffff80002b0099b8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021295d40) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002b009af0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002b009af0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac8974b2560, count: -9