panic: panic: kernel diagnostic assertion "rw_write_held(uobj->vmobjlock)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_aobj.c", line 1003 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *207968 76470 0 0 0 1 syz-executor.4 220211 92395 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b7d4c,3eb,ffffffff8275e34c) at __assert+0x25 sys/kern/subr_prf.c:157 uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f uao_find_swslot sys/uvm/uvm_aobj.c:249 [inline] uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f sys/uvm/uvm_aobj.c:1174 uvm_fault_lower_lookup(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00) at uvm_fault_lower_lookup+0xf6 sys/uvm/uvm_fault.c:1129 uvm_fault_lower(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00,0) at uvm_fault_lower+0x5f sys/uvm/uvm_fault.c:1228 uvm_fault(fffffd8008a02000,f4120b3f000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000249c5100,f4120b3f04c) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff8000249c5100) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0db0, count: 5 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: vop_generic_badop cpu1: kernel diagnostic assertion "rw_write_held(uobj->vmobjlock)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_aobj.c", line 1003 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b7d4c,3eb,ffffffff8275e34c) at __assert+0x25 sys/kern/subr_prf.c:157 uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f uao_find_swslot sys/uvm/uvm_aobj.c:249 [inline] uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f sys/uvm/uvm_aobj.c:1174 uvm_fault_lower_lookup(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00) at uvm_fault_lower_lookup+0xf6 sys/uvm/uvm_fault.c:1129 uvm_fault_lower(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00,0) at uvm_fault_lower+0x5f sys/uvm/uvm_fault.c:1228 uvm_fault(fffffd8008a02000,f4120b3f000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000249c5100,f4120b3f04c) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff8000249c5100) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0db0, count: -10 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000249c4b90 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff8000212945e8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5b4d9919eb880a5d r11 0xa153f05ffba7847c r12 0xffff800020d69990 r13 0 r14 0xffffffff82b25990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81b420b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000249c4b80 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.4) pid=207968 stat=onproc flags process=0 proc=0 pri=81, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212950c8,0xffff800021294340 process=0xffff800021287258 user=0xffff8000249c0000, vmspace=0xfffffd8008a02000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *76470 207968 71252 0 7 0 syz-executor.4 66660 428334 56671 0 2 0 syz-executor.6 66660 333165 56671 0 2 0x4000000 syz-executor.6 66654 86770 41733 0 2 0 syz-executor.5 66654 272728 41733 0 3 0x4000080 fsleep syz-executor.5 51476 495244 88234 0 2 0 syz-executor.0 51476 209403 88234 0 3 0x4000080 fsleep syz-executor.0 92395 242962 47432 0 2 0 syz-executor.1 92395 220211 47432 0 7 0x4000000 syz-executor.1 92395 456039 47432 0 3 0x4000000 inode syz-executor.1 56671 273651 86904 0 3 0x82 nanoslp syz-executor.6 70545 344639 1 0 3 0 vmmaplk syz-executor.6 70545 438000 1 0 3 0x4000000 vmmaplk syz-executor.6 47432 168110 86904 0 3 0x82 nanoslp syz-executor.1 89423 110620 1 0 3 0x100083 ttyin getty 41733 72778 86904 0 3 0x82 nanoslp syz-executor.5 96311 35395 86904 0 2 0x2 syz-executor.7 51326 402858 86904 0 2 0x2 syz-executor.2 610 397739 1 0 3 0 vmmaplk syz-executor.2 610 263297 1 0 3 0x4000000 vmmaplk syz-executor.2 610 151455 1 0 3 0x4000000 vmmaplk syz-executor.2 71252 5360 86904 0 3 0x82 nanoslp syz-executor.4 15819 136770 86904 0 3 0x2 biowait syz-executor.3 48744 151959 0 0 3 0x14280 nfsidl nfsio 43604 141404 0 0 3 0x14280 nfsidl nfsio 49217 29365 0 0 3 0x14280 nfsidl nfsio 2817 23696 0 0 3 0x14280 nfsidl nfsio 55166 50282 0 0 3 0x14280 nfsidl nfsio 84089 1398 0 0 3 0x14280 nfsidl nfsio 58340 240098 0 0 3 0x14280 nfsidl nfsio 65908 101795 0 0 3 0x14280 nfsidl nfsio 60272 128820 0 0 3 0x14280 nfsidl nfsio 88078 306131 0 0 3 0x14280 nfsidl nfsio 58806 421274 0 0 3 0x14280 nfsidl nfsio 10581 260741 0 0 3 0x14280 nfsidl nfsio 23128 521893 0 0 3 0x14280 nfsidl nfsio 1311 142097 0 0 3 0x14280 nfsidl nfsio 51025 339081 0 0 3 0x14280 nfsidl nfsio 65675 169757 0 0 3 0x14280 nfsidl nfsio 19932 162184 0 0 3 0x14280 nfsidl nfsio 12434 95765 0 0 3 0x14280 nfsidl nfsio 5406 203641 0 0 3 0x14280 nfsidl nfsio 33883 228628 0 0 3 0x14280 nfsidl nfsio 52350 443846 0 0 3 0x14200 bored sosplice 88234 144882 86904 0 3 0x82 nanoslp syz-executor.0 86904 250355 48298 0 3 0x82 wait syz-fuzzer 86904 190501 48298 0 3 0x4000082 nanoslp syz-fuzzer 86904 77655 48298 0 3 0x4000082 wait syz-fuzzer 86904 116729 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 488000 48298 0 3 0x4000082 wait syz-fuzzer 86904 181879 48298 0 3 0x4000082 wait syz-fuzzer 86904 213076 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 442575 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 365488 48298 0 2 0x4000082 syz-fuzzer 86904 203394 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 361087 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 323497 48298 0 3 0x4000082 wait syz-fuzzer 86904 395095 48298 0 3 0x4000082 wait syz-fuzzer 86904 125913 48298 0 3 0x4000082 thrsleep syz-fuzzer 86904 189314 48298 0 3 0x4000082 wait syz-fuzzer 86904 439464 48298 0 3 0x4000082 wait syz-fuzzer 48298 12744 26736 0 3 0x10008a sigsusp ksh 26736 225519 75729 0 3 0x9a kqread sshd 75729 502984 1 0 3 0x88 kqread sshd 70175 8723 22576 74 3 0x1100092 bpf pflogd 22576 43647 1 0 3 0x80 netio pflogd 80675 349380 48061 73 3 0x1100010 ffs_fsync syslogd 48061 416693 1 0 3 0x100082 netio syslogd 59017 125689 1 0 3 0x100080 kqread resolvd 18048 335456 35852 77 3 0x100092 kqread dhcpleased 20550 321912 35852 77 3 0x100092 kqread dhcpleased 35852 520487 1 0 3 0x80 kqread dhcpleased 68651 34548 0 0 3 0x14200 bored smr 29154 237671 0 0 2 0x14200 zerothread 90971 241075 0 0 3 0x14200 aiodoned aiodoned 38061 189944 0 0 3 0x14200 syncer update 36715 129193 0 0 3 0x14200 cleaner cleaner 91799 72791 0 0 3 0x14200 reaper reaper 16278 484813 0 0 3 0x14200 pgdaemon pagedaemon 15962 479126 0 0 3 0x14200 bored viomb 24446 330580 0 0 3 0x40014200 acpi0 acpi0 76855 227586 0 0 3 0x40014200 idle1 74271 440941 0 0 3 0x14200 bored softnet 33707 230359 0 0 3 0x14200 bored softnet 69942 473661 0 0 3 0x14200 bored softnet 73747 74349 0 0 3 0x14200 bored softnet 2665 228039 0 0 3 0x14200 bored systqmp 20078 137976 0 0 3 0x14200 bored systq 10051 278731 0 0 3 0x40014200 bored softclock 14898 148758 0 0 3 0x40014200 idle0 1 73377 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10233 6491K 7255K 78643K 17532 0 pcb 13 16K 21K 78643K 880 0 rtable 195 15K 16K 78643K 1286 0 ifaddr 77 25K 27K 78643K 390 0 sysctl 2 0K 0K 78643K 2 0 counters 58 35K 36K 78643K 374 0 ioctlops 0 0K 4K 78643K 4429 0 iov 0 0K 20K 78643K 844 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1558 97K 97K 78643K 4238 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 30 0 VM map 2 1K 1K 78643K 2 0 sem 19 2K 2K 78643K 26 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 89K 78643K 4012 0 sigio 0 0K 0K 78643K 25 0 proc 70 91K 140K 78643K 1181 0 subproc 130 8K 8K 78643K 289 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 402 0 in_multi 77 5K 7K 78643K 351 0 ether_multi 1 0K 0K 78643K 27 0 mrt 1 0K 0K 78643K 33 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 211 943K 943K 78643K 211 0 exec 0 0K 1K 78643K 918 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 355 106K 114K 78643K 29797 0 UVM aobj 131 6K 6K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 88 0 NDP 13 0K 2K 78643K 124 0 temp 141 5779K 6798K 78643K 68647 0 kqueue 12 18K 26K 78643K 336 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 120 460 0 457 8 7 1 3 0 8 0 rtentry 112 411 0 328 4 0 4 4 0 8 0 unpcb 144 3396 0 3381 38 36 2 8 0 8 1 syncache 296 30 0 30 9 9 0 1 0 8 0 tcpqe 32 62 0 62 7 7 0 1 0 8 0 tcpcb 776 1205 0 1201 49 48 1 8 0 8 0 arp 120 52 0 38 1 0 1 1 0 8 0 inpcb 368 3811 0 3804 64 60 4 11 0 8 3 nd6 48 72 0 52 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 kcovpl 48 22 0 12 1 0 1 1 0 8 0 mppekey 1024 81 0 81 5 5 0 1 0 8 0 ppxss 1256 118 0 118 9 9 0 1 0 8 0 pppxif 1456 16 0 16 6 6 0 1 0 8 0 pfstscr 40 17 0 16 2 1 1 1 0 8 0 pffrag 232 43 0 42 4 3 1 1 0 482 0 pffrnode 88 43 0 42 4 3 1 1 0 8 0 pffrent 40 107 0 106 4 3 1 1 0 8 0 pfosfp 40 1495 0 1070 5 0 5 5 0 8 0 pfosfpen 112 1495 0 779 21 0 21 21 0 8 0 pfanchor 1280 647 41 135 47 4 43 43 0 8 0 pfstitem 24 40 0 37 1 0 1 1 0 8 0 pfstkey 128 53 0 48 1 0 1 1 0 8 0 pfstate 384 43 0 40 3 2 1 3 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 8 0 8 1 1 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 1492 0 1117 39 13 26 30 0 8 1 art_table 32 1494 0 1118 4 0 4 4 0 8 0 art_node 16 336 0 264 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 18 0 1 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6675 0 5219 92 0 92 92 0 8 0 ffsino 272 6675 0 5219 98 0 98 98 0 8 0 nchpl 144 12990 0 11342 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 46657 0 46654 5 4 1 2 0 8 0 percpumem 16 200 0 158 1 0 1 1 0 8 0 vmpool 696 89 0 89 6 5 1 1 0 8 1 kstatmem 264 156 0 130 2 0 2 2 0 8 0 scsiplug 72 11 0 11 2 2 0 1 0 8 0 scxspl 216 35294 0 35292 21 18 3 8 0 8 2 plimitpl 152 364 0 346 1 0 1 1 0 8 0 sigapl 424 4330 0 4262 10 2 8 8 0 8 0 futexpl 64 38917 0 38915 3 2 1 1 0 8 0 knotepl 120 527 0 0 11 0 11 11 0 8 0 kqueuepl 216 609 0 601 4 3 1 3 0 8 0 pipepl 320 713 0 682 19 16 3 8 0 8 0 fdescpl 496 4291 0 4261 8 3 5 5 0 8 1 filepl 152 31184 0 30908 57 40 17 18 0 8 5 lockfpl 104 1625 0 1623 6 5 1 4 0 8 0 lockfspl 48 619 0 617 2 1 1 2 0 8 0 sessionpl 144 40 0 21 1 0 1 1 0 8 0 pgrppl 48 65 0 46 1 0 1 1 0 8 0 ucredpl 104 3094 0 3082 1 0 1 1 0 8 0 zombiepl 144 4262 0 4262 3 2 1 1 0 8 1 processpl 1072 4330 0 4262 5 0 5 5 0 8 0 procpl 696 11717 0 11626 17 6 11 11 0 8 1 srpgc 96 22 0 22 8 7 1 1 0 8 1 sosppl 168 58 0 58 6 5 1 1 0 8 1 sockpl 488 7678 0 7653 167 159 8 29 0 8 4 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 22 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 508 0 0 63 3 60 63 0 8 1 mtagpl 96 440 0 0 11 0 11 11 0 8 0 mbufpl 256 2261 0 0 130 0 130 130 0 8 0 bufpl 288 10210 0 3882 453 0 453 453 0 8 0 anonpl 24 940586 0 921622 194 60 134 141 0 186 1 amapchunkpl 152 85520 0 84682 61 21 40 46 0 158 0 amappl16 200 11767 0 11197 96 63 33 45 0 8 0 amappl15 192 20 0 19 1 0 1 1 0 8 0 amappl14 184 199 0 186 2 1 1 2 0 8 0 amappl13 176 6 0 6 2 2 0 1 0 8 0 amappl12 168 596 0 592 1 0 1 1 0 8 0 amappl11 160 51 0 36 1 0 1 1 0 8 0 amappl10 152 50 0 37 1 0 1 1 0 8 0 amappl9 144 980 0 979 2 1 1 1 0 8 0 amappl8 136 320 0 241 3 0 3 3 0 8 0 amappl7 128 202 0 175 2 1 1 2 0 8 0 amappl6 120 269 0 251 2 1 1 2 0 8 0 amappl5 112 227 0 218 1 0 1 1 0 8 0 amappl4 104 752 0 718 2 0 2 2 0 8 0 amappl3 96 12467 0 12405 2 0 2 2 0 8 0 amappl2 88 4950 0 4868 4 2 2 4 0 8 0 amappl1 80 101428 0 100615 30 11 19 28 0 8 0 amappl 88 28972 0 28755 7 1 6 6 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 4380 0 4350 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4380 0 4350 1 0 1 1 0 8 0 vmmpekpl 168 38311 0 38249 4 0 4 4 0 8 0 vmmpepl 168 408106 0 405077 277 125 152 170 0 357 12 vmsppl 440 4379 0 4350 6 2 4 5 0 8 0 rwobjpl 56 117525 0 109595 121 7 114 115 0 8 0 pdppl 4096 8767 0 8700 395 324 71 81 0 8 4 pvpl 32 1832623 0 1807932 431 212 219 367 0 265 2 pmappl 248 4379 0 4350 4 1 3 3 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1373 0 421 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82b24ff0) 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800029bd4920,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(20) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(76) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(76) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff800029bd4d48) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80678f32e0,fffffd80675ced88) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 end trace frame: 0xffff800029bd4df0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82b24ff0) 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800029bd4920,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(20) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(76) at db_putchar+0x316 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(76) at db_putchar+0x316 sys/ddb/db_output.c:153 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff800029bd4d48) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80678f32e0,fffffd80675ced88) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd80675ced88) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd80675ced88) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800029bd4fe0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd8067642958,ffff800029bd5140,ffff800029bd5170,ffff800029bd5070) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212d9358,ffffff9c,20000040,8c) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800029bd52f0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800029bd52f0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3f545b7a440, count: -21 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b7d4c,3eb,ffffffff8275e34c) at __assert+0x25 sys/kern/subr_prf.c:157 uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f uao_find_swslot sys/uvm/uvm_aobj.c:249 [inline] uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f sys/uvm/uvm_aobj.c:1174 uvm_fault_lower_lookup(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00) at uvm_fault_lower_lookup+0xf6 sys/uvm/uvm_fault.c:1129 uvm_fault_lower(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00,0) at uvm_fault_lower+0x5f sys/uvm/uvm_fault.c:1228 uvm_fault(fffffd8008a02000,f4120b3f000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000249c5100,f4120b3f04c) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff8000249c5100) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0db0, count: 5 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b7d4c,3eb,ffffffff8275e34c) at __assert+0x25 sys/kern/subr_prf.c:157 uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f uao_find_swslot sys/uvm/uvm_aobj.c:249 [inline] uao_get(fffffd8078ff8f30,0,ffff8000249c4f00,ffff8000249c4d74,0,1,d2ea42536cd178be,fffffd8078ff8f30) at uao_get+0x78f sys/uvm/uvm_aobj.c:1174 uvm_fault_lower_lookup(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00) at uvm_fault_lower_lookup+0xf6 sys/uvm/uvm_fault.c:1129 uvm_fault_lower(ffff8000249c4f80,ffff8000249c4fb8,ffff8000249c4f00,0) at uvm_fault_lower+0x5f sys/uvm/uvm_fault.c:1228 uvm_fault(fffffd8008a02000,f4120b3f000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000249c5100,f4120b3f04c) at upageflttrap+0x85 sys/arch/amd64/amd64/trap.c:186 usertrap(ffff8000249c5100) at usertrap+0x204 sys/arch/amd64/amd64/trap.c:438 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffe0db0, count: -10