witness: lock order reversal: 1st 0xffffffff82d0ad08 &sched_lock (&sched_lock) 2nd 0xffff800021212b00 &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(ffff800021212b00,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800021212b00,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800021212af0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800024727d40,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800024727d40,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800024727d40,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800024727d40,6,ffff80002e44d2a8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800024727d40) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e44d3e0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e44d3e0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8283fc02d50, count: -9 ddb{0}> show registers rdi 0x3 rsi 0xffffffff82b6a550 __sancov_gen_cov_switch_values.134 rbp 0xffff80002e44cfb0 rbx 0x3 rdx 0 rcx 0xffff800024727d40 rax 0xffffffff82c29ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80002e44cf20 r9 0x8080808080808080 r10 0xa7bec2073abbbc07 r11 0x9b746538decc439e r12 0xfffffd8003a0a7a0 r13 0 r14 0xfffffd80039ff010 r15 0xfffffd80031c7bc0 rip 0xffffffff81334fdc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e44cfa0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=388317 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff800024726800,0xffffffff82c89948 process=0xffff8000212129f0 user=0xffff80002e448000, vmspace=0xfffffd80612dd3c8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37211 450774 27756 32767 4 0x582010 syz-executor.3 *37211 388317 27756 32767 7 0x4502010 syz-executor.3 10336 300461 13727 32767 3 0x90 nanoslp syz-executor.5 10336 134317 13727 32767 3 0x4000090 fsleep syz-executor.5 10336 512250 13727 32767 3 0x4000090 fsleep syz-executor.5 10336 415608 13727 32767 3 0x4000090 fsleep syz-executor.5 35873 426381 89576 32767 7 0x10 syz-executor.2 35873 131105 89576 32767 3 0x4000090 fsleep syz-executor.2 35873 516442 89576 32767 2 0x4000010 syz-executor.2 35873 280562 89576 32767 3 0x4000090 fsleep syz-executor.2 84498 293385 97112 32767 2 0x10 syz-executor.4 84498 131878 97112 32767 2 0x4000010 syz-executor.4 84498 95541 97112 32767 3 0x4000090 fsleep syz-executor.4 35573 522233 0 0 3 0x14200 bored sosplice 89576 152488 63358 32767 2 0x10 syz-executor.2 63358 365166 80672 0 3 0x82 wait syz-executor.2 83797 490242 29457 32767 3 0x90 nanoslp syz-executor.7 29457 516339 80672 0 3 0x82 wait syz-executor.7 13727 21321 47048 32767 3 0x90 nanoslp syz-executor.5 43695 383573 6084 32767 2 0x10 syz-executor.6 47048 139391 80672 0 3 0x82 wait syz-executor.5 6084 17222 80672 0 3 0x82 wait syz-executor.6 97112 422887 90118 32767 2 0x10 syz-executor.4 90118 520319 80672 0 3 0x82 wait syz-executor.4 27756 422486 67147 32767 3 0x90 nanoslp syz-executor.3 67147 27929 80672 0 3 0x82 wait syz-executor.3 23220 230651 55803 32767 3 0x10 biowait syz-executor.1 48882 74818 85337 32767 3 0x10 biowait syz-executor.0 55803 72161 80672 0 3 0x82 wait syz-executor.1 85337 81806 80672 0 3 0x82 wait syz-executor.0 80672 417409 56081 0 3 0x2000082 thrsleep syz-fuzzer 80672 158194 56081 0 3 0x6000082 nanoslp syz-fuzzer 80672 245727 56081 0 3 0x6000082 kqread syz-fuzzer 80672 126793 56081 0 3 0x6000082 wait syz-fuzzer 80672 407517 56081 0 3 0x6000082 wait syz-fuzzer 80672 488864 56081 0 3 0x6000082 wait syz-fuzzer 80672 343639 56081 0 3 0x6000082 wait syz-fuzzer 80672 48360 56081 0 3 0x6000082 wait syz-fuzzer 80672 326401 56081 0 3 0x6000082 thrsleep syz-fuzzer 80672 333669 56081 0 3 0x6000082 thrsleep syz-fuzzer 80672 322716 56081 0 3 0x6000082 wait syz-fuzzer 80672 387630 56081 0 3 0x6000082 thrsleep syz-fuzzer 80672 341814 56081 0 3 0x6000082 wait syz-fuzzer 80672 181147 56081 0 3 0x6000082 wait syz-fuzzer 80672 148174 56081 0 3 0x6000082 thrsleep syz-fuzzer 56081 262878 65730 0 3 0x10008a sigsusp ksh 65730 50455 24903 0 3 0x9a kqread sshd 8920 391643 1 0 3 0x100083 ttyin getty 24903 348703 1 0 3 0x88 kqread sshd 23175 92633 69329 73 3 0x1100090 kqread syslogd 69329 396744 1 0 3 0x100082 netio syslogd 72310 200964 1 0 3 0x100080 kqread resolvd 58553 486372 99809 77 3 0x100092 kqread dhcpleased 59818 345883 99809 77 3 0x100092 kqread dhcpleased 99809 458960 1 0 3 0x80 kqread dhcpleased 10580 499187 0 0 3 0x14200 bored smr 51759 385241 0 0 2 0x14200 zerothread 41071 262085 0 0 3 0x14200 aiodoned aiodoned 27309 6569 0 0 3 0x14200 syncer update 85763 357152 0 0 3 0x14200 cleaner cleaner 66725 241705 0 0 3 0x14200 reaper reaper 40891 513456 0 0 3 0x14200 pgdaemon pagedaemon 88876 391602 0 0 3 0x14200 bored viomb 39697 92753 0 0 3 0x40014200 acpi0 acpi0 26823 128677 0 0 3 0x40014200 idle1 38234 102658 0 0 3 0x14200 bored softnet3 51672 181954 0 0 3 0x14200 bored softnet2 55573 102830 0 0 3 0x14200 bored softnet1 86192 143008 0 0 3 0x14200 bored softnet0 91266 230475 0 0 3 0x14200 bored systqmp 98557 161150 0 0 3 0x14200 bored systq 14997 205522 0 0 3 0x40014200 bored softclock 74761 74193 0 0 3 0x40014200 idle0 1 14604 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 (0xffffffff82d0ad08) #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 37211 (syz-executor.3) thread 0xffff800024727d40 (388317) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c795f0) #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 (0xffffffff82d0ad08) #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 35873 (syz-executor.2) thread 0xffff800021273010 (426381) exclusive rwlock futex r = 0 (0xffffffff82bff3c0) #0 witness_lock+0x447 #1 sys_futex+0x60 sys/kern/sys_futex.c:98 #2 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 Process 23220 (syz-executor.1) thread 0xffff80002120faa8 (230651) exclusive rrwlock inode r = 0 (0xfffffd80701de918) #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 (0xfffffd806d84f818) #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 48882 (syz-executor.0) thread 0xffff80002120e568 (74818) exclusive rrwlock inode r = 0 (0xfffffd80701de1a8) #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 (0xfffffd8069c10d58) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10183 6408K 6420K 78643K 11264 0 pcb 13 10K 12K 78643K 15 0 rtable 234 6K 6K 78643K 394 0 pf 29 8K 8K 78643K 31 0 ifaddr 44 15K 15K 78643K 50 0 ifgroup 50 2K 2K 78643K 54 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 62 0 ioctlops 0 0K 2K 78643K 38 0 iov 0 0K 16K 78643K 72 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1348 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 117K 78643K 754 0 sigio 0 0K 0K 78643K 2 0 proc 56 78K 127K 78643K 546 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 1K 78643K 698 0 in_multi 99 7K 7K 78643K 209 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 469 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 345 86K 87K 78643K 9442 0 UVM aobj 15 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 33 0 NDP 11 0K 2K 78643K 30 0 temp 73 5912K 5976K 78643K 5638 0 kqueue 12 18K 22K 78643K 60 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 120 117 0 114 2 0 2 2 0 8 1 rtentry 112 123 0 13 4 0 4 4 0 8 0 unpcb 144 138 0 121 1 0 1 1 0 8 0 syncache 304 10 0 10 2 1 1 1 0 8 1 tcpqe 32 246 0 246 2 1 1 1 0 8 1 tcpcb 808 445 0 439 8 0 8 8 0 8 7 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 368 1474 0 1465 11 0 11 11 0 8 10 nd6 136 28 0 4 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 46 29 0 29 29 0 8 0 art_table 32 499 0 46 4 0 4 4 0 8 0 art_node 16 122 0 22 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2226 0 788 91 0 91 91 0 8 0 ffsino 272 2226 0 788 97 0 97 97 0 8 0 nchpl 144 3334 0 1694 63 0 63 63 0 8 0 uvmvnodes 80 2352 0 0 48 0 48 48 0 8 0 vnodes 216 2352 0 0 131 0 131 131 0 8 0 namei 1024 10351 0 10349 2 1 1 2 0 8 0 percpumem 16 44 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 10957 0 10955 10 7 3 8 1 8 2 plimitpl 152 50 0 27 1 0 1 1 0 8 0 sigapl 424 1045 0 993 7 0 7 7 0 8 0 futexpl 64 5359 0 5353 1 0 1 1 0 8 0 knotepl 120 112 0 0 4 0 4 4 0 8 0 kqueuepl 216 140 0 132 5 0 5 5 0 8 4 pipepl 320 355 0 327 13 2 11 13 0 8 8 fdescpl 496 1027 0 994 7 2 5 6 0 8 0 filepl 152 5421 0 5180 21 3 18 21 0 8 8 lockfpl 104 66 0 64 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 315 0 297 1 0 1 1 0 8 0 zombiepl 144 994 0 993 1 0 1 1 0 8 0 processpl 1072 1045 0 993 5 1 4 5 0 8 0 procpl 680 2168 0 2093 8 0 8 8 0 8 1 sosppl 168 33 0 33 1 0 1 1 0 8 1 sockpl 488 1744 0 1715 19 3 16 16 0 8 12 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 325 0 0 41 0 41 41 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 350 0 0 22 0 22 22 0 8 0 bufpl 288 5172 0 142 360 0 360 360 0 8 0 anonpl 24 225568 0 214701 72 4 68 68 0 186 0 amapchunkpl 152 30252 0 29358 40 0 40 40 0 158 3 amappl16 200 5418 0 5160 15 0 15 15 0 8 1 amappl15 192 13 0 13 1 1 0 1 0 8 0 amappl14 184 147 0 135 2 1 1 2 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 1674 0 1639 2 0 2 2 0 8 0 amappl11 160 58 0 47 1 0 1 1 0 8 0 amappl10 152 35 0 25 1 0 1 1 0 8 0 amappl9 144 337 0 334 1 0 1 1 0 8 0 amappl8 136 207 0 151 2 0 2 2 0 8 0 amappl7 128 63 0 50 2 0 2 2 0 8 0 amappl6 120 239 0 222 1 0 1 1 0 8 0 amappl5 112 189 0 180 1 0 1 1 0 8 0 amappl4 104 552 0 514 2 0 2 2 0 8 0 amappl3 96 5908 0 5818 3 0 3 3 0 8 0 amappl2 88 1247 0 1177 3 1 2 3 0 8 0 amappl1 80 11910 0 11384 22 9 13 22 0 8 0 amappl 88 8908 0 8669 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 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1027 0 994 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1027 0 994 1 0 1 1 0 8 0 vmmpekpl 168 14231 0 14179 3 0 3 3 0 8 0 vmmpepl 168 79935 0 77718 124 7 117 124 0 357 15 vmsppl 464 1026 0 994 7 2 5 6 0 8 0 rwobjpl 56 28335 0 24705 55 3 52 52 0 8 0 pdppl 4096 2062 0 1988 120 38 82 92 0 8 8 pvpl 32 531065 0 514286 339 20 319 337 0 265 179 pmappl 248 1026 0 994 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 803 0 41 22 0 22 22 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(ffff800021212b00,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800021212b00,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff800021212af0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800024727d40,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800024727d40,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800024727d40,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800024727d40,6,ffff80002e44d2a8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800024727d40) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002e44d3e0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002e44d3e0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8283fc02d50, 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 __mp_lock(ffffffff82d0ab00) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d0ab00) at __mp_lock+0x122 sys/kern/kern_lock.c:147 wakeup_n(ffff800024726ff8,1) at wakeup_n+0x37 sys/kern/kern_synch.c:541 futex_requeue(79f339701e0,7fffffff,0,0,2) at futex_requeue+0x120 sys/kern/sys_futex.c:296 sys_futex(ffff800021273010,ffff80002471b410,ffff80002471b460) at sys_futex+0x119 sys/kern/sys_futex.c:105 syscall(ffff80002471b4e0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002471b4e0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x777056faf060, count: -9