witness: lock order reversal: 1st 0xffffffff82c65f30 &sched_lock (&sched_lock) 2nd 0xffff8000295a0128 &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(ffff8000295a0128,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295a0128,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295a0118) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021225a90,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021225a90,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021225a90,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021225a90,6,ffff80002ca11ad8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021225a90) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002ca11c10) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002ca11c10) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8129dc06280, count: -9 ddb{1}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be63 rbp 0xffff80002ca117e0 rbx 0x3 rdx 0xffff800000d07ac0 rcx 0xffff800021225a90 rax 0x3ffff acpi_pdirpa+0x2be62 r8 0xffff80002ca11750 r9 0x8080808080808080 r10 0xf7a4639f35742180 r11 0x37af8723690f69c6 r12 0xfffffd8003a0d850 r13 0 r14 0xfffffd80039fca20 r15 0xfffffd80031cabc0 rip 0xffffffff8165630c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002ca117d0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=463070 stat=onproc flags process=500010 proc=4002000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800021224550,0xffff800021224ab0 process=0xffff8000295a0018 user=0xffff80002ca0c000, vmspace=0xfffffd806bfa45a0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29458 104298 41495 32767 2 0x10 syz-executor.2 29458 335690 41495 32767 3 0x4000010 biowait syz-executor.2 39624 277868 2858 32767 4 0x582010 syz-executor.5 *39624 463070 2858 32767 7 0x4502010 syz-executor.5 58317 239036 20937 32767 3 0x90 nanoslp syz-executor.4 58317 272377 20937 32767 3 0x4000090 fsleep syz-executor.4 56124 335907 92864 32767 3 0x4003010 suspend syz-executor.6 56124 154683 92864 32767 2 0x4081010 syz-executor.6 9959 305707 11534 32767 3 0x3010 suspend syz-executor.7 9959 331570 11534 32767 7 0x4081010 syz-executor.7 9959 217328 11534 32767 2 0x4081090 syz-executor.7 90447 239564 0 0 3 0x14200 bored sosplice 92864 403675 80878 32767 3 0x90 nanoslp syz-executor.6 2858 350099 26050 32767 3 0x90 nanoslp syz-executor.5 11534 336180 49963 32767 3 0x90 nanoslp syz-executor.7 80878 477137 98952 0 3 0x82 wait syz-executor.6 26050 445255 98952 0 3 0x82 wait syz-executor.5 20937 192276 67147 32767 3 0x90 nanoslp syz-executor.4 16787 338651 16297 32767 3 0x10 biowait syz-executor.3 49963 356807 98952 0 3 0x82 wait syz-executor.7 67147 479829 98952 0 3 0x82 wait syz-executor.4 16297 335316 98952 0 3 0x82 wait syz-executor.3 58392 66629 70293 32767 2 0x10 syz-executor.1 41495 379556 57216 32767 3 0x90 nanoslp syz-executor.2 70293 182002 98952 0 3 0x82 wait syz-executor.1 99858 20735 10109 32767 3 0x90 nanoslp syz-executor.0 57216 362883 98952 0 3 0x82 wait syz-executor.2 10109 460006 98952 0 3 0x82 wait syz-executor.0 98952 73432 42919 0 3 0x2000082 wait syz-fuzzer 98952 403744 42919 0 3 0x6000082 nanoslp syz-fuzzer 98952 208724 42919 0 3 0x6000082 thrsleep syz-fuzzer 98952 399368 42919 0 3 0x6000082 wait syz-fuzzer 98952 516651 42919 0 3 0x6000082 wait syz-fuzzer 98952 118437 42919 0 3 0x6000082 wait syz-fuzzer 98952 506535 42919 0 3 0x6000082 kqread syz-fuzzer 98952 192760 42919 0 3 0x6000082 wait syz-fuzzer 98952 20545 42919 0 3 0x6000082 thrsleep syz-fuzzer 98952 192941 42919 0 3 0x6000082 thrsleep syz-fuzzer 98952 178232 42919 0 3 0x6000082 thrsleep syz-fuzzer 98952 484226 42919 0 3 0x6000082 wait syz-fuzzer 98952 143213 42919 0 3 0x6000082 wait syz-fuzzer 98952 132354 42919 0 3 0x6000082 wait syz-fuzzer 98952 179810 42919 0 3 0x6000082 thrsleep syz-fuzzer 98952 344827 42919 0 3 0x6000082 thrsleep syz-fuzzer 42919 105262 24163 0 3 0x10008a sigsusp ksh 24163 228436 22553 0 3 0x9a kqread sshd 13468 514612 1 0 3 0x100083 ttyin getty 22553 256939 1 0 3 0x88 kqread sshd 39031 338859 29211 73 3 0x1100090 kqread syslogd 29211 420071 1 0 3 0x100082 netio syslogd 17635 112926 1 0 3 0x100080 kqread resolvd 32060 458064 74860 77 3 0x100092 kqread dhcpleased 95280 453794 74860 77 3 0x100092 kqread dhcpleased 74860 327761 1 0 3 0x80 kqread dhcpleased 37934 337951 0 0 3 0x14200 bored smr 48471 181373 0 0 2 0x14200 zerothread 78800 243735 0 0 3 0x14200 aiodoned aiodoned 13912 251342 0 0 3 0x14200 syncer update 11936 107216 0 0 3 0x14200 cleaner cleaner 39483 305670 0 0 3 0x14200 reaper reaper 6200 280627 0 0 3 0x14200 pgdaemon pagedaemon 88457 275202 0 0 3 0x14200 bored viomb 48617 45112 0 0 3 0x40014200 acpi0 acpi0 95485 222408 0 0 3 0x40014200 idle1 33314 359299 0 0 3 0x14200 bored softnet3 31306 79130 0 0 3 0x14200 bored softnet2 13478 472042 0 0 3 0x14200 bored softnet1 2675 201965 0 0 3 0x14200 bored softnet0 36680 294375 0 0 3 0x14200 bored systqmp 68395 110943 0 0 3 0x14200 bored systq 61130 77039 0 0 3 0x40014200 bored softclock 81359 253786 0 0 3 0x40014200 idle0 1 17226 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 29458 (syz-executor.2) thread 0xffff800021224aa0 (335690) exclusive rrwlock inode r = 0 (0xfffffd8070e2b0a8) #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 (0xfffffd8064174d58) #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 39624 (syz-executor.5) thread 0xffff800021225a90 (463070) 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 16787 (syz-executor.3) thread 0xffff80002121b2b8 (338651) exclusive rrwlock inode r = 0 (0xfffffd8070e2b2c8) #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 (0xfffffd8008b171b0) #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 10207 6411K 6420K 78643K 11286 0 pcb 13 10K 12K 78643K 15 0 rtable 240 6K 7K 78643K 642 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 45 0 iov 0 0K 16K 78643K 982 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 2225 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 86 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 5043 0 sigio 0 0K 0K 78643K 64 0 proc 56 78K 103K 78643K 882 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 353 0 in_multi 99 7K 7K 78643K 138 0 ether_multi 1 0K 0K 78643K 9 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 181 811K 811K 78643K 181 0 exec 0 0K 1K 78643K 1016 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 383 86K 90K 78643K 51119 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 131 0 NDP 11 0K 2K 78643K 27 0 temp 74 5920K 6000K 78643K 14772 0 kqueue 12 18K 32K 78643K 427 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 120 284 0 281 5 4 1 3 0 8 0 rtentry 112 121 0 8 4 0 4 4 0 8 0 unpcb 144 2679 0 2662 31 27 4 7 0 8 3 syncache 304 63 0 63 9 8 1 1 0 8 1 tcpqe 32 144 0 144 9 8 1 1 0 8 1 tcpcb 808 4705 0 4694 62 57 5 15 0 8 1 arp 120 19 0 0 1 0 1 1 0 8 0 ipq 40 7 0 6 2 1 1 1 0 8 0 ipqe 40 32 0 31 2 1 1 1 0 8 0 inpcb 368 6051 0 6037 61 53 8 14 0 8 4 nd6 136 33 0 7 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 256 522 0 47 32 2 30 31 0 8 0 art_table 32 523 0 47 4 0 4 4 0 8 0 art_node 16 120 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 1 0 1 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 9 0 0 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 7941 0 6500 91 0 91 91 0 8 0 ffsino 272 7941 0 6500 97 0 97 97 0 8 0 nchpl 144 14340 0 12661 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 46984 0 46982 2 1 1 2 0 8 0 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 45826 0 45824 24 22 2 8 1 8 1 plimitpl 152 603 0 580 8 7 1 2 0 8 0 sigapl 424 5339 0 5286 7 0 7 7 0 8 0 futexpl 64 46625 0 46623 1 0 1 1 0 8 0 knotepl 120 345 0 0 10 1 9 10 0 8 0 kqueuepl 216 1263 0 1255 27 22 5 5 0 8 4 pipepl 320 1203 0 1175 29 21 8 9 0 8 5 fdescpl 496 5321 0 5287 7 1 6 6 0 8 0 filepl 152 31380 0 31142 50 35 15 19 0 8 5 lockfpl 104 1647 0 1645 1 0 1 1 0 8 0 lockfspl 48 411 0 409 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 4572 0 4554 1 0 1 1 0 8 0 zombiepl 144 5288 0 5286 1 0 1 1 0 8 0 processpl 1072 5339 0 5286 5 1 4 5 0 8 0 procpl 680 13967 0 13892 17 9 8 8 0 8 1 sosppl 168 77 0 77 2 1 1 1 0 8 1 sockpl 488 9292 0 9258 160 147 13 25 0 8 7 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 24 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 286 0 0 36 2 34 36 0 8 1 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 8844 0 0 548 0 548 548 0 8 0 bufpl 288 11489 0 5164 453 0 453 453 0 8 0 anonpl 24 667677 0 656430 156 61 95 98 0 186 11 amapchunkpl 152 160843 0 159923 52 12 40 42 0 158 2 amappl16 200 17722 0 17423 66 36 30 30 0 8 9 amappl15 192 10 0 8 1 0 1 1 0 8 0 amappl14 184 156 0 139 2 0 2 2 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 5957 0 5921 2 0 2 2 0 8 0 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 37 0 23 1 0 1 1 0 8 0 amappl9 144 254 0 254 4 3 1 1 0 8 1 amappl8 136 411 0 310 4 0 4 4 0 8 0 amappl7 128 88 0 75 2 0 2 2 0 8 0 amappl6 120 330 0 310 1 0 1 1 0 8 0 amappl5 112 257 0 248 1 0 1 1 0 8 0 amappl4 104 623 0 585 2 0 2 2 0 8 0 amappl3 96 32204 0 32105 3 0 3 3 0 8 0 amappl2 88 5794 0 5722 3 1 2 3 0 8 0 amappl1 80 26653 0 26123 22 9 13 22 0 8 0 amappl 88 50407 0 50160 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 5321 0 5287 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5321 0 5287 1 0 1 1 0 8 0 vmmpekpl 168 44801 0 44741 4 0 4 4 0 8 0 vmmpepl 168 322235 0 319840 167 46 121 122 0 357 14 vmsppl 464 5320 0 5287 7 1 6 6 0 8 0 rwobjpl 56 92966 0 85531 112 3 109 109 0 8 0 pdppl 4096 10650 0 10574 178 96 82 94 0 8 6 pvpl 32 1656562 0 1639182 361 182 179 336 0 265 19 pmappl 248 5320 0 5287 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1598 0 224 40 0 40 40 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+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d03228) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800022cd5360,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+0x1c kd_curproc sys/dev/kcov.c:588 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x1c 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(ffff800022cd54c0,ffff80000067b300) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __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(ffff800022cd5610,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+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 single_thread_check_locked(ffff80002126e2b0,0) at single_thread_check_locked+0x23a sys/kern/kern_sig.c:2033 userret(ffff80002126e2b0) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff80002126e2b0) at userret+0x72 sys/kern/kern_sig.c:1970 syscall(ffff800022cd58d0) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff800022cd58d0) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x54542379f20, count: -19 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(ffff8000295a0128,9,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff8000295a0128,9,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1110 mtx_enter(ffff8000295a0118) at mtx_enter+0x3e sys/kern/kern_lock.c:265 single_thread_set(ffff800021225a90,0,1) at single_thread_set+0x35a single_thread_wait sys/kern/kern_sig.c:2172 [inline] single_thread_set(ffff800021225a90,0,1) at single_thread_set+0x35a sys/kern/kern_sig.c:2155 sigexit(ffff800021225a90,6) at sigexit+0x90 sys/kern/kern_sig.c:1562 postsig(ffff800021225a90,6,ffff80002ca11ad8) at postsig+0x4a9 sys/kern/kern_sig.c:1494 userret(ffff800021225a90) at userret+0x16e sys/kern/kern_sig.c:1987 syscall(ffff80002ca11c10) at syscall+0x4e7 mi_syscall_return sys/sys/syscall_mi.h:137 [inline] syscall(ffff80002ca11c10) at syscall+0x4e7 sys/arch/amd64/amd64/trap.c:644 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8129dc06280, count: -9