panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1269 Starting stack trace... panic(ffffffff825a382d) at panic+0x16b sys/kern/subr_prf.c:229 __assert(ffffffff8261b0c5,ffffffff825932a1,4f5,ffffffff825c9a1e) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8006af8e20) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd806d63fa38,9911fd7e000,9911ff7d000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1681 uvm_unmap_kill_entry_withlock(fffffd806d63fa38,fffffd80677d3900,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1888 uvm_map_teardown(fffffd806d63fa38) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806d63fa38) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523 uvmspace_free(fffffd806d63fa38) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff8000212337a8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 249 End of stack trace. syncing disks... WARNING: SPL NOT LOWERED ON SYSCALL 3 4 EXIT 0 9 Stopped at savectx+0xae: movl $0,%gs:0x540 TID PID UID PRFLAGS PFLAGS CPU COMMAND *429845 1993 74 0x1100012 0 1 pflogd 380094 19238 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x7f7ffffe4e00, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1269 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7f7ffffe4e00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000212a8770 rbx 0 rdx 0 rcx 0 rax 0x31 r8 0xffff8000212a86a0 r9 0x1 r10 0xbbeb5dd2e8840e8b r11 0xdd3846065c46b58b r12 0 r13 0 r14 0xffff800021279270 r15 0 rip 0xffffffff823f93fe savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000212a86f0 ss 0x10 savectx+0xae: movl $0,%gs:0x540 ddb{1}> show proc PROC (pflogd) pid=429845 stat=onproc flags process=1100012 proc=0 pri=26, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021278550,0xffff800021278800 process=0xffff8000ffff4438 user=0xffff8000212a3000, vmspace=0xfffffd80087522e0 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72752 367714 26845 0 2 0x2 syz-executor.1 95625 396531 26845 0 2 0x2 syz-executor.3 67317 163584 26845 0 3 0x82 wait syz-executor.7 89456 227310 26845 0 3 0x82 wait syz-executor.6 75602 442499 26845 0 3 0x82 wait syz-executor.5 98945 328707 26845 0 3 0x82 wait syz-executor.4 61226 217810 26845 0 3 0x82 wait syz-executor.2 72357 410806 26845 0 3 0x82 wait syz-executor.0 57946 219804 0 0 3 0x14280 nfsidl nfsio 57889 201958 0 0 3 0x14280 nfsidl nfsio 8877 307022 0 0 3 0x14280 nfsidl nfsio 17431 6706 0 0 3 0x14280 nfsidl nfsio 59474 451570 0 0 3 0x14280 nfsidl nfsio 78779 84910 0 0 3 0x14280 nfsidl nfsio 21259 483862 0 0 3 0x14280 nfsidl nfsio 39020 510811 0 0 3 0x14280 nfsidl nfsio 10188 22657 0 0 3 0x14280 nfsidl nfsio 31001 378283 0 0 3 0x14280 nfsidl nfsio 82105 265540 0 0 3 0x14280 nfsidl nfsio 62405 62422 0 0 3 0x14280 nfsidl nfsio 31999 239143 0 0 3 0x14280 nfsidl nfsio 26826 499285 0 0 3 0x14280 nfsidl nfsio 24422 4964 0 0 3 0x14280 nfsidl nfsio 2309 184576 0 0 3 0x14280 nfsidl nfsio 24405 11325 0 0 3 0x14280 nfsidl nfsio 48813 168995 0 0 3 0x14280 nfsidl nfsio 46268 10188 0 0 3 0x14280 nfsidl nfsio 2330 370361 0 0 3 0x14280 nfsidl nfsio 57913 361325 1 0 2 0x100083 getty 77701 32199 0 0 3 0x14200 bored sosplice 26845 449666 28507 0 3 0x82 wait syz-fuzzer 26845 94762 28507 0 2 0x4000482 syz-fuzzer 26845 206651 28507 0 3 0x4000082 wait syz-fuzzer 26845 104374 28507 0 3 0x4000082 thrsleep syz-fuzzer 26845 417595 28507 0 3 0x4000082 wait syz-fuzzer 26845 204832 28507 0 3 0x4000082 wait syz-fuzzer 26845 102648 28507 0 3 0x4000082 thrsleep syz-fuzzer 26845 468992 28507 0 3 0x4000082 thrsleep syz-fuzzer 26845 523104 28507 0 3 0x4000082 wait syz-fuzzer 26845 401252 28507 0 3 0x4000082 thrsleep syz-fuzzer 26845 216936 28507 0 3 0x4000082 wait syz-fuzzer 26845 174598 28507 0 2 0x4000082 syz-fuzzer 26845 312389 28507 0 3 0x4000082 wait syz-fuzzer 26845 337385 28507 0 3 0x4000082 thrsleep syz-fuzzer 26845 157689 28507 0 3 0x4000082 wait syz-fuzzer 26845 179813 28507 0 3 0x4000082 thrsleep syz-fuzzer 28507 244407 94409 0 3 0x10008a sigsusp ksh 94409 358399 15125 0 3 0x9a kqread sshd 15125 275742 1 0 3 0x88 kqread sshd * 1993 429845 97361 74 7 0x1100012 pflogd 97361 244756 1 0 3 0x80 netio pflogd 13637 44031 90746 73 2 0x1100010 syslogd 90746 155841 1 0 3 0x100082 netio syslogd 96392 488210 1 0 3 0x100080 kqread resolvd 71760 478722 2435 77 3 0x100092 kqread dhcpleased 46155 127001 2435 77 3 0x100092 kqread dhcpleased 2435 501254 1 0 3 0x80 kqread dhcpleased 19517 482105 0 0 3 0x14200 bored smr 98381 427212 0 0 2 0x14200 zerothread 38252 80213 0 0 3 0x14200 aiodoned aiodoned 14875 322155 0 0 3 0x14200 syncer update 46231 46019 0 0 3 0x14200 cleaner cleaner 19238 380094 0 0 7 0x14200 reaper 94252 59585 0 0 3 0x14200 pgdaemon pagedaemon 89927 129967 0 0 3 0x14200 bored viomb 35242 364920 0 0 3 0x40014200 acpi0 acpi0 42051 289704 0 0 3 0x40014200 idle1 24210 104234 0 0 3 0x14200 bored softnet 34255 254946 0 0 3 0x14200 bored softnet 94283 191984 0 0 3 0x14200 bored softnet 21423 80986 0 0 3 0x14200 bored softnet 17152 3107 0 0 3 0x14200 bored systqmp 77988 54828 0 0 3 0x14200 bored systq 39690 128021 0 0 2 0x40014200 softclock 59682 514447 0 0 3 0x40014200 idle0 1 379037 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff82a9c268) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x21e sys/uvm/uvm_fault.c:1680 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1888 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #7 reaper+0x19a sys/kern/kern_exit.c:448 #8 proc_trampoline+0x1c Process 13637 (syslogd) thread 0xffff800021279cf0 (44031) Process 19238 (reaper) thread 0xffff8000212337a8 (380094) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 6524K 8241K 78643K 60186 0 pcb 13 22K 27K 78643K 4404 0 rtable 222 24K 26K 78643K 7657 0 ifaddr 121 29K 33K 78643K 2470 0 sysctl 2 0K 2K 78643K 19 0 counters 54 35K 36K 78643K 1126 0 ioctlops 0 0K 8K 78643K 7749 0 iov 0 0K 28K 78643K 3267 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1678 105K 105K 78643K 16665 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 311 0 VM map 2 1K 1K 78643K 2 0 sem 15 16K 32K 78643K 583 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 10 33K 93K 78643K 31136 0 sigio 0 0K 0K 78643K 1460 0 proc 75 91K 116K 78643K 5378 0 subproc 91 5K 6K 78643K 1732 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 1K 78643K 22205 0 in_multi 66 4K 7K 78643K 5037 0 ether_multi 1 0K 0K 78643K 89 0 mrt 1 0K 0K 78643K 88 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 2K 78643K 6848 0 pfkey data 0 0K 0K 78643K 78 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 62K 78643K 8 0 UVM amap 829 2291K 2297K 78643K 187933 0 UVM aobj 134 7K 7K 78643K 144 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 889 0 NDP 19 0K 1K 78643K 676 0 temp 154 4727K 70263K 78643K 311803 0 kqueue 12 18K 26K 78643K 2434 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 2196 0 2193 27 26 1 4 0 8 0 rtentry 112 2340 0 2270 6 2 4 4 0 8 0 unpcb 144 20581 0 20566 199 198 1 10 0 8 0 syncache 296 117 0 117 29 29 0 1 0 8 0 tcpqe 32 110 225 110 7 7 0 1 0 8 0 tcpcb 768 9250 0 9240 305 299 6 22 0 8 4 arp 120 381 0 369 1 0 1 1 0 8 0 inpcb 320 44394 0 44381 366 361 5 19 0 8 3 nd6 48 460 0 445 1 0 1 1 0 8 0 pkpcb 40 162 0 162 25 25 0 1 0 8 0 kcovpl 48 131 0 125 1 0 1 1 0 8 0 ppxss 1256 371 0 371 39 39 0 1 0 8 0 pfstscr 40 6 0 6 2 2 0 1 0 8 0 pffrag 232 158 0 158 4 4 0 1 0 482 0 pffrnode 88 158 0 158 4 4 0 1 0 8 0 pffrent 40 603 0 603 5 5 0 1 0 8 0 pfosfp 40 1435 0 1010 5 0 5 5 0 8 0 pfosfpen 112 1435 0 719 21 0 21 21 0 8 0 pfrktable 1344 353 0 340 4 2 2 2 0 8 0 pfanchor 1280 22 0 9 2 0 2 2 0 8 0 pftag 88 10 0 4 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 86 0 83 1 0 1 1 0 8 0 pfstkey 120 98 0 95 1 0 1 1 0 8 0 pfstate 336 92 0 89 3 2 1 3 0 8 0 pfrule 1360 218 0 181 5 1 4 4 0 8 0 rttmr 136 29 0 29 9 9 0 1 0 8 0 art_heap8 4096 5 0 4 4 3 1 3 0 8 0 art_heap4 256 8787 0 8467 78 52 26 32 0 8 1 art_table 32 8792 0 8471 6 2 4 5 0 8 0 art_node 16 2283 0 2223 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 543 0 530 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 40472 0 38934 97 0 97 97 0 8 0 ffsino 272 40472 0 38934 104 0 104 104 0 8 0 nchpl 144 82224 0 80576 63 0 63 63 0 8 0 rtmask 32 31 0 31 12 12 0 1 0 8 0 uvmvnodes 80 7917 0 0 162 0 162 162 0 8 0 vnodes 216 7917 0 0 440 0 440 440 0 8 0 namei 1024 296837 0 296837 11 10 1 2 0 8 1 percpumem 16 575 0 536 1 0 1 1 0 8 0 vcpupl 2048 406 0 0 51 0 51 51 0 8 0 vmpool 568 527 0 121 31 2 29 30 0 8 0 pfiaddrpl 120 242 0 225 1 0 1 1 0 8 0 kstatmem 264 754 0 716 18 15 3 4 0 8 0 scsiplug 72 21 0 21 7 7 0 1 0 8 0 scxspl 216 250359 0 250355 77 76 1 8 0 8 0 plimitpl 152 3066 0 3050 1 0 1 1 0 8 0 sigapl 424 31479 0 31411 11 3 8 8 0 8 0 futexpl 64 276091 0 276091 9 8 1 1 0 8 1 knotepl 120 1409 0 0 17 0 17 17 0 8 0 kqueuepl 216 6788 0 6780 117 116 1 8 0 8 0 pipepl 320 7057 0 7029 179 176 3 13 0 8 0 fdescpl 496 31176 0 31153 7 3 4 5 0 8 0 filepl 152 217423 0 217200 299 287 12 23 0 8 0 lockfpl 104 7328 0 7326 14 13 1 3 0 8 0 lockfspl 48 2364 0 2362 2 1 1 2 0 8 0 sessionpl 144 150 0 134 1 0 1 1 0 8 0 pgrppl 48 373 0 357 1 0 1 1 0 8 0 ucredpl 104 34844 0 34826 1 0 1 1 0 8 0 zombiepl 144 31418 0 31411 4 3 1 1 0 8 0 processpl 1064 31479 0 31411 5 0 5 5 0 8 0 procpl 672 91278 0 91188 29 21 8 10 0 8 0 srpgc 96 185 0 185 49 49 0 1 0 8 0 sosppl 168 230 0 229 24 23 1 1 0 8 0 sockpl 488 67409 0 67378 1033 1022 11 35 0 8 5 mcl64k 65536 33 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 52 0 0 2 0 2 2 0 8 0 mcl9k 9216 41 0 0 2 0 2 2 0 8 0 mcl8k 8192 65 0 0 4 1 3 3 0 8 0 mcl4k 4096 77 0 0 4 0 4 4 0 8 0 mcl2k2 2112 19 0 0 2 0 2 2 0 8 0 mcl2k 2048 760 0 0 60 33 27 60 0 8 1 mtagpl 96 1102 0 0 15 4 11 15 0 8 0 mbufpl 256 1599 0 0 67 1 66 67 0 8 1 bufpl 288 53305 0 45256 575 0 575 575 0 8 0 anonpl 24 6336612 0 6309251 449 273 176 179 0 186 0 amapchunkpl 152 554842 0 553641 128 78 50 61 0 158 2 amappl16 200 92218 0 91219 321 266 55 67 0 8 0 amappl15 192 5958 0 5949 1 0 1 1 0 8 0 amappl14 184 3495 0 3486 2 1 1 1 0 8 0 amappl13 176 4035 0 4030 1 0 1 1 0 8 0 amappl12 168 2760 0 2752 1 0 1 1 0 8 0 amappl11 160 3760 0 3742 2 0 2 2 0 8 0 amappl10 152 4930 0 4925 1 0 1 1 0 8 0 amappl9 144 4127 0 4123 1 0 1 1 0 8 0 amappl8 136 7549 0 7345 8 0 8 8 0 8 0 amappl7 128 4735 0 4711 1 0 1 1 0 8 0 amappl6 120 4636 0 4613 2 1 1 2 0 8 0 amappl5 112 29583 0 29564 1 0 1 1 0 8 0 amappl4 104 10768 0 10722 2 0 2 2 0 8 0 amappl3 96 97903 0 97838 2 0 2 2 0 8 0 amappl2 88 6305 0 6251 2 0 2 2 0 8 0 amappl1 80 775076 0 774372 22 6 16 20 0 8 0 amappl 88 184475 0 184115 9 0 9 9 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 72 143 0 10 3 0 3 3 0 8 0 uaddrrnd 24 31704 0 31269 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31704 0 31269 3 0 3 3 0 8 0 vmmpekpl 168 238600 0 238501 5 0 5 5 0 8 0 vmmpepl 168 3100659 0 3096705 567 350 217 217 0 357 27 vmsppl 368 31703 0 31268 41 1 40 40 0 8 0 rwobjpl 56 764116 0 753671 198 50 148 148 0 8 0 pdppl 4096 63415 0 62942 1692 1218 474 475 0 8 1 pvpl 32 12241206 0 12219959 737 488 249 258 0 265 16 pmappl 248 31703 0 31268 30 2 28 28 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2847 0 1363 43 0 43 43 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82990ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff829e8800) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e8800) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021238dd0,ffff800000078500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff829e8800) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e8800) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff829e8800,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(fffffd8071feeb50,11,ffffffff826620ee,0) at tsleep+0x179 getblk(fffffd807efb5a20,12fce0,4000,0,ffffffffffffffff) at getblk+0x13c sys/kern/vfs_bio.c:1028 bread(fffffd807efb5a20,12fce0,4000,ffff8000212391b8) at bread+0x3a bio_doread sys/kern/vfs_bio.c:433 [inline] bread(fffffd807efb5a20,12fce0,4000,ffff8000212391b8) at bread+0x3a sys/kern/vfs_bio.c:478 ffs_update(fffffd806f494440,0) at ffs_update+0x14b sys/ufs/ffs/ffs_inode.c:91 VOP_FSYNC(fffffd806f1cc8a0,fffffd807f7d7ea0,2,ffff8000212337a8) at VOP_FSYNC+0xce sys/kern/vfs_vops.c:311 ffs_sync_vnode(fffffd806f1cc8a0,ffff800021239350) at ffs_sync_vnode+0x180 sys/ufs/ffs/ffs_vfsops.c:1197 end trace frame: 0xffff800021239340, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82990ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff829e8800) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e8800) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021238dd0,ffff800000078500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff829e8800) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e8800) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff829e8800,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 tsleep(fffffd8071feeb50,11,ffffffff826620ee,0) at tsleep+0x179 getblk(fffffd807efb5a20,12fce0,4000,0,ffffffffffffffff) at getblk+0x13c sys/kern/vfs_bio.c:1028 bread(fffffd807efb5a20,12fce0,4000,ffff8000212391b8) at bread+0x3a bio_doread sys/kern/vfs_bio.c:433 [inline] bread(fffffd807efb5a20,12fce0,4000,ffff8000212391b8) at bread+0x3a sys/kern/vfs_bio.c:478 ffs_update(fffffd806f494440,0) at ffs_update+0x14b sys/ufs/ffs/ffs_inode.c:91 VOP_FSYNC(fffffd806f1cc8a0,fffffd807f7d7ea0,2,ffff8000212337a8) at VOP_FSYNC+0xce sys/kern/vfs_vops.c:311 ffs_sync_vnode(fffffd806f1cc8a0,ffff800021239350) at ffs_sync_vnode+0x180 sys/ufs/ffs/ffs_vfsops.c:1197 vfs_mount_foreach_vnode(ffff8000006d7c00,ffffffff82301ab0,ffff800021239350) at vfs_mount_foreach_vnode+0x55 sys/kern/vfs_subr.c:910 ffs_sync(ffff8000006d7c00,2,0,fffffd807f7d7ea0,ffff8000212337a8) at ffs_sync+0x11f sys/ufs/ffs/ffs_vfsops.c:1248 sys_sync(ffff8000212337a8,0,0) at sys_sync+0xbc sys/kern/vfs_syscalls.c:537 vfs_syncwait(ffff8000212337a8,1) at vfs_syncwait+0x36 vfs_shutdown(ffff8000212337a8) at vfs_shutdown+0x5d sys/kern/vfs_subr.c:1791 boot(100) at boot+0xc8 sys/arch/amd64/amd64/machdep.c:830 cm_helper_program_color_matrices(100,100,0) at cm_helper_program_color_matrices panic(ffffffff825a382d) at panic+0x18b sys/kern/subr_prf.c:231 __assert(ffffffff8261b0c5,ffffffff825932a1,4f5,ffffffff825c9a1e) at __assert+0x25 sys/kern/subr_prf.c:157 uvm_pageunwire(fffffd8006af8e20) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269 uvm_fault_unwire_locked(fffffd806d63fa38,9911fd7e000,9911ff7d000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1681 uvm_unmap_kill_entry_withlock(fffffd806d63fa38,fffffd80677d3900,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:1888 uvm_map_teardown(fffffd806d63fa38) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806d63fa38) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523 uvmspace_free(fffffd806d63fa38) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff8000212337a8) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -29 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x540 savectx() at savectx+0xae end of kernel end trace frame: 0x7f7ffffe4e00, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7f7ffffe4e00, count: -1