˜witness: lock order reversal: 1st 0xffffffff839fecd8 &sched_lock (&sched_lock) 2nd 0xffff8000299dee30 &cq->cq_mtx (&cq->cq_mtx) lock order [1] &sched_lock (&sched_lock) -> [2] &cq->cq_mtx (&cq->cq_mtx) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 #2 mi_switch+0x187 sys/kern/sched_bsd.c:376 #3 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #4 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] #4 sys_futex+0xb90 sys/kern/sys_futex.c:155 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 lock order [2] &cq->cq_mtx (&cq->cq_mtx) -> [1] &sched_lock (&sched_lock) #0 mtx_enter+0x95 sys/kern/kern_lock.c:406 #1 sleep_setup+0xed sys/kern/kern_synch.c:304 #2 msleep_nsec+0x10b sys/kern/kern_synch.c:217 #3 dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:589 #4 dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] #4 dtclose+0x109 sys/dev/dt/dt_dev.c:239 #5 spec_close+0x466 sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x121 sys/kern/kern_descrip.c:1280 #9 closef+0x192 sys/kern/kern_descrip.c:1264 #10 fdfree+0x116 sys/kern/kern_descrip.c:1195 #11 exit1+0x576 sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 Stopped at db_enter+0x25: 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+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff8000299dee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffff8000299dee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffff8000299de2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 sys_futex(ffff8000fffe2558,ffff800039fe0ba0,ffff800039fe0af0) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] sys_futex(ffff8000fffe2558,ffff800039fe0ba0,ffff800039fe0af0) at sys_futex+0xb90 sys/kern/sys_futex.c:155 syscall(ffff800039fe0ba0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe0ba0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb1af0b1cb70, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800039fe0770 rbx 0 rdx 0 rcx 0xffff8000fffe2558 rax 0xffff8000299ddff0 r8 0xffff800039fe0650 r9 0x8080808080808080 r10 0xe3bd2d7cdaaa9a11 r11 0xcaec251284ef9a2d r12 0xfffffd8003f48300 r13 0xfffffd8004738d58 r14 0x3 r15 0xffffffff83418d8b substchar+0x86a5 rip 0xffffffff83191cb5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039fe0760 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=241452 pid=39597 tcnt=2 stat=sleep flags process=4000000 proc=4000080 runpri=55, usrpri=55, slppri=32, nice=20 wchan=0xffff800039fe0a10, wmesg=fsleep, ps_single=0x0 scnt=0 ecnt=0 forw=0x0, list=0xffff8000fffe3a18,0xffffffff839f5a40 process=0xffff80003c424028 user=0xffff800039fdb000, vmspace=0xfffffd806c4447c0 estcpu=10, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39597 501885 31986 0 7 0x4000000 syz-executor *39597 241452 31986 0 3 0x4000080 fsleep syz-executor 12932 47741 0 0 3 0x14280 nfsidl nfsio 94903 27036 0 0 3 0x14280 nfsidl nfsio 98594 469821 0 0 3 0x14280 nfsidl nfsio 99642 475725 0 0 3 0x14280 nfsidl nfsio 77762 462286 0 0 3 0x14280 nfsidl nfsio 58597 394336 0 0 3 0x14280 nfsidl nfsio 81044 155130 0 0 3 0x14280 nfsidl nfsio 2709 397612 0 0 3 0x14280 nfsidl nfsio 94915 498138 0 0 3 0x14280 nfsidl nfsio 81922 53672 0 0 3 0x14280 nfsidl nfsio 28283 393350 0 0 3 0x14280 nfsidl nfsio 68343 76135 0 0 3 0x14280 nfsidl nfsio 1366 217730 0 0 3 0x14280 nfsidl nfsio 76571 281479 0 0 3 0x14280 nfsidl nfsio 90149 304769 0 0 3 0x14280 nfsidl nfsio 41347 334543 0 0 3 0x14280 nfsidl nfsio 61765 214336 0 0 3 0x14280 nfsidl nfsio 85135 167121 0 0 3 0x14280 nfsidl nfsio 62250 345041 0 0 3 0x14280 nfsidl nfsio 49221 339481 0 0 3 0x14280 nfsidl nfsio 78689 475384 21077 0 3 0x80 nanoslp syz-executor 78689 223782 21077 0 3 0x4000080 kqread syz-executor 78689 409199 21077 0 3 0x4000080 fsleep syz-executor 66772 318114 57669 0 3 0x80 nanoslp syz-executor 66772 99692 57669 0 3 0x4000080 sbwait syz-executor 66772 329463 57669 0 3 0x4000080 fsleep syz-executor 66772 109503 57669 0 3 0x4000080 fsleep syz-executor 72076 302995 46076 0 3 0x80 nanoslp syz-executor 72076 144824 46076 0 3 0x4000080 fsleep syz-executor 72076 383873 46076 0 3 0x4000080 fsleep syz-executor 72076 14210 46076 0 3 0x4000080 kqread syz-executor 96591 444881 1 0 3 0x82 nanoslp getty 47134 129392 83162 0 3 0x82 nanoslp syz-executor 28641 272899 0 0 3 0x14200 acct acct 57669 404092 83162 0 3 0x82 nanoslp syz-executor 21077 144257 83162 0 3 0x82 nanoslp syz-executor 31986 20731 83162 0 3 0x82 nanoslp syz-executor 56886 227094 83162 0 3 0x82 wait syz-executor 42374 281768 83162 0 3 0x2 biowait syz-executor 46076 278157 83162 0 3 0x82 nanoslp syz-executor 19515 353957 83162 0 3 0x82 wait syz-executor 83162 269856 60914 0 3 0x82 kqread syz-executor 60914 87070 56767 0 3 0x10008a sigsusp ksh 56767 47645 11543 0 3 0x98 kqread sshd-session 11543 53177 31059 0 3 0x92 kqread sshd-session 31059 393188 1 0 3 0x88 kqread sshd 52420 363495 127 74 3 0x1100092 bpf pflogd 127 180893 1 0 3 0x80 sbwait pflogd 89067 216151 59012 73 3 0x1100090 kqread syslogd 59012 154203 1 0 3 0x100082 sbwait syslogd 97247 509619 1 0 3 0x100080 kqread resolvd 62639 359723 81773 77 3 0x100092 kqread dhcpleased 21565 38590 81773 77 3 0x100092 kqread dhcpleased 81773 59290 1 0 3 0x80 kqread dhcpleased 93066 322029 0 0 3 0x14200 bored smr 80387 13167 0 0 3 0x14200 pgzero zerothread 86618 292811 0 0 3 0x14200 aiodoned aiodoned 64387 130150 0 0 3 0x14200 syncer update 75732 138883 0 0 3 0x14200 cleaner cleaner 26244 458050 0 0 3 0x14200 reaper reaper 5729 300535 0 0 3 0x14200 pgdaemon pagedaemon 25541 268368 0 0 3 0x14200 bored viomb 69281 394398 0 0 3 0x40014200 acpi0 acpi0 986 156390 0 0 3 0x40014200 idle1 36525 248505 0 0 3 0x14200 bored softnet1 81929 360313 0 0 3 0x14200 bored softnet0 71255 361911 0 0 3 0x14200 bored systqmp 74119 209666 0 0 3 0x14200 bored systq 13594 496929 0 0 3 0x14200 tmoslp softclockmp 72181 369082 0 0 3 0x40014200 tmoslp softclock 38426 50110 0 0 3 0x40014200 idle0 1 335673 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &sched_lock r = 0 (0xffffffff839fecd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 sleep_finish+0x1d6 sys/kern/kern_synch.c:357 #3 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] #3 sys_futex+0xb90 sys/kern/sys_futex.c:155 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 Process 39597 (syz-executor) thread 0xffff8000fffe3a18 (501885) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83a09780) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 #2 Xintr_ioapic_edge23_untramp+0x18f #3 Xspllower+0x1d #4 pmap_write_protect+0x526 sys/arch/amd64/amd64/pmap.c:2164 #5 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] #5 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3196 #6 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 exclusive rwlock uobjlk r = 0 (0xfffffd806d0cb248) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_map_protect+0xb36 sys/uvm/uvm_map.c:3196 #3 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806c4448c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5165 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3069 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 42374 (syz-executor) thread 0xffff8000ffffdc90 (281768) exclusive rrwlock inode r = 0 (0xfffffd806e788498) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd4b7c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11074 12117K 12463K 166960K 13208 0 pcb 18 17K 19K 166960K 235 0 rtable 242 9K 10K 166960K 482 0 pf 34 17K 19K 166960K 100 0 ifaddr 43 7K 8K 166960K 84 0 ifgroup 55 2K 2K 166960K 119 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 38K 166960K 146 0 ioctlops 0 0K 4K 166960K 1597 0 iov 0 0K 20K 166960K 64 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1405 88K 89K 166960K 2004 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 30 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 814 0 sigio 0 0K 0K 166960K 58 0 proc 72 115K 164K 166960K 658 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 81 0 in_multi 98 7K 7K 166960K 148 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 520 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 168K 190K 166960K 9720 0 UVM aobj 30 6K 8K 166960K 37 0 pinsyscall 42 84K 106K 166960K 1993 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 60 0 NDP 13 0K 2K 166960K 58 0 temp 53 8674K 8749K 166960K 32833 0 kqueue 14 22K 28K 166960K 149 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 91 0 87 1 0 1 1 0 8 0 rtentry 176 143 0 41 6 0 6 6 0 8 0 unpcb 144 549 0 530 4 2 2 2 0 8 1 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 358 0 350 13 9 4 10 0 8 2 arp 136 21 0 4 1 0 1 1 0 8 0 inpcb 328 989 0 941 18 11 7 13 0 8 2 nd6 152 31 0 6 2 0 2 2 0 8 1 pkpcb 40 6 0 6 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 34 0 34 3 2 1 1 0 8 1 pffrag 232 6 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 9 0 4 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 rttmr 136 3 0 3 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 669 0 224 34 1 33 33 0 8 3 art_table 40 673 0 224 6 0 6 6 0 8 0 art_node 32 142 0 50 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 32 0 6 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2912 0 1398 96 0 96 96 0 8 0 ffsino 296 2912 0 1398 118 1 117 118 0 8 0 nchpl 144 4043 0 2339 64 0 64 64 0 8 0 rtmask 32 8 0 8 2 1 1 1 0 8 1 vnodes 216 3324 0 0 185 0 185 185 0 8 0 namei 1024 14343 0 14342 4 3 1 2 0 8 0 percpumem 16 88 0 38 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 848 2 0 1 1 0 1 1 0 8 0 kstatmem 264 78 0 52 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 30910 0 30909 11 4 7 8 1 8 6 plimitpl 152 253 0 235 1 0 1 1 0 8 0 sigapl 424 1152 0 1084 9 1 8 8 0 8 0 knotepl 120 318 0 0 10 0 10 10 0 8 0 kqueuepl 224 264 0 251 4 3 1 3 0 8 0 pipepl 344 186 0 158 3 0 3 3 0 8 0 fdescpl 528 1110 0 1079 3 0 3 3 0 8 0 filepl 160 6816 0 6553 28 13 15 20 0 8 3 lockfpl 104 277 0 274 1 0 1 1 0 8 0 lockfspl 48 101 0 98 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 45 0 29 1 0 1 1 0 8 0 ucredpl 104 1050 0 1036 1 0 1 1 0 8 0 zombiepl 144 1287 0 1284 1 0 1 1 0 8 0 processpl 1232 1152 0 1084 6 0 6 6 0 8 0 procpl 664 2358 0 2281 7 0 7 7 0 8 0 sosppl 176 8 0 7 2 1 1 1 0 8 0 sockpl 752 1653 0 1582 24 14 10 18 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 31 0 0 1 0 1 1 0 8 0 mbufpl 256 834 0 0 53 0 53 53 0 8 0 bufpl 280 13053 0 6917 439 0 439 439 0 8 0 anonpl 32 12067 0 0 98 0 98 98 0 246 0 amapchunkpl 152 32026 0 31516 48 15 33 33 0 158 7 amappl16 200 4676 0 4641 46 28 18 28 0 8 7 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 33 0 32 1 0 1 1 0 8 0 amappl13 176 441 0 440 1 0 1 1 0 8 0 amappl12 168 1493 0 1451 3 0 3 3 0 8 0 amappl11 160 9 0 9 2 2 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 36 0 33 1 0 1 1 0 8 0 amappl7 128 80 0 79 1 0 1 1 0 8 0 amappl6 120 310 0 296 1 0 1 1 0 8 0 amappl5 112 85 0 74 1 0 1 1 0 8 0 amappl4 104 447 0 416 1 0 1 1 0 8 0 amappl3 96 5326 0 5228 4 1 3 3 0 8 0 amappl2 88 1283 0 1202 3 0 3 3 0 8 0 amappl1 80 13406 0 12811 17 2 15 16 0 8 0 amappl 88 8834 0 8661 5 0 5 5 0 92 0 uvmvnodes 80 133 0 0 3 0 3 3 0 8 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 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 36 0 7 1 0 1 1 0 8 0 uaddrrnd 24 1110 0 1079 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1110 0 1079 1 0 1 1 0 8 0 vmmpekpl 168 11143 0 11097 3 0 3 3 0 8 0 vmmpepl 168 79364 0 77411 117 8 109 110 0 357 11 vmsppl 488 1109 0 1079 6 1 5 5 0 8 0 rwobjpl 80 25083 0 23968 35 2 33 33 0 8 1 pdppl 4096 2231 0 2161 106 32 74 85 0 8 4 pvpl 32 19459 0 0 158 1 157 157 0 265 0 pmappl 256 1111 0 1080 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 347 0 50 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83839ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 mtx_enter(ffffffff839fecc8) at mtx_enter+0x377 sys/kern/kern_lock.c:454 wakeup_n(fffffd800b07b118,ffffffff) at wakeup_n+0x54 sys/kern/kern_synch.c:581 sd_buf_done(fffffd805f836200) at sd_buf_done+0x2de sys/scsi/sd.c:772 scsi_done(fffffd805f836200) at scsi_done+0x40 sys/scsi/scsi_base.c:1496 vioscsi_vq_done(ffff8000000a4268) at vioscsi_vq_done+0xe1 sys/dev/pv/vioscsi.c:-1 intr_handler(ffff8000333c2370,ffff8000002a3480) at intr_handler+0x125 sys/arch/amd64/amd64/intr.c:564 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d pmap_write_protect(fffffd806a5ceb00,b1ae8bd1000,b1ae8fd0000,1) at pmap_write_protect+0x526 sys/arch/amd64/amd64/pmap.c:2164 uvm_map_protect(fffffd806c4447c0,b1ae8bd1000,b1ae8fd0000,1,0,0,18c1e7dbb192f307) at uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] uvm_map_protect(fffffd806c4447c0,b1ae8bd1000,b1ae8fd0000,1,0,0,18c1e7dbb192f307) at uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3196 sys_mprotect(ffff8000fffe3a18,ffff8000333c2740,ffff8000333c2690) at sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 syscall(ffff8000333c2740) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000333c2740) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x767053c32dc0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(ffff8000299dee30,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 mtx_enter(ffff8000299dee20) at mtx_enter+0x95 sys/kern/kern_lock.c:406 clockintr_cancel(ffff8000299de2f8) at clockintr_cancel+0x2f sys/kern/kern_clockintr.c:323 mi_switch() at mi_switch+0x187 sys/kern/sched_bsd.c:376 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 sys_futex(ffff8000fffe2558,ffff800039fe0ba0,ffff800039fe0af0) at sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] sys_futex(ffff8000fffe2558,ffff800039fe0ba0,ffff800039fe0af0) at sys_futex+0xb90 sys/kern/sys_futex.c:155 syscall(ffff800039fe0ba0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fe0ba0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb1af0b1cb70, count: -9