uvm_fault(0xffffffff839f41a8, 0xffff8000272e21a0, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 216111 54985 0 0 0x4000000 0 syz-executor ffs2_balloc(fffffd806fbc9960,100340,40,fffffd80097fd478,1,ffff80002a2f1ca8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a2f1d30) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8063129a80,ffff80002a2f1dc8,23,fffffd80097fd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8063129a80,ffff80002a2f1f00,40,0,1,bb5659520b10b5ee,0,a,100) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff8000ffff34d8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000ffff34d8,43,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000ffff34d8,ffff80002a2f2140,ffff80002a2f2090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2f2140) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2f2140) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb0f3e78eb0, count: 6 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 *cpu1: uvm_fault(0xffffffff839f41a8, 0xffff8000272e21a0, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd806fbc9960,100340,40,fffffd80097fd478,1,ffff80002a2f1ca8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a2f1d30) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8063129a80,ffff80002a2f1dc8,23,fffffd80097fd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8063129a80,ffff80002a2f1f00,40,0,1,bb5659520b10b5ee,0,a,100) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff8000ffff34d8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000ffff34d8,43,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000ffff34d8,ffff80002a2f2140,ffff80002a2f2090) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2f2140) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2f2140) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb0f3e78eb0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2f1c50 rbx 0 rdx 0 rcx 0xffff8000272e2000 rax 0x34 r8 0xffffffffffffffff r9 0xffff80002a2f1ca8 r10 0xfd3e54ab1c09176e r11 0x17403a6e8e16db31 r12 0x1 r13 0xffff800000c31800 r14 0xffff80002a2f1ae0 r15 0xfffffd805f62fa00 rip 0xffffffff81685ccd ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2f1ad0 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (syz-executor) tid=72730 pid=3732 tcnt=0 stat=onproc flags process=a proc=2000 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffff2548,0xffff8000ffff3780 process=0xffff8000fffec4e8 user=0xffff80002a2ed000, vmspace=0xfffffd806ea7e7b0 estcpu=36, cpticks=6, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 54985 12739 8771 0 2 0 syz-executor 54985 216111 8771 0 7 0x4000000 syz-executor 54985 85582 8771 0 2 0x4000000 syz-executor 6345 397497 40535 0 2 0 syz-executor 6345 169135 40535 0 3 0x4000080 fsleep syz-executor 60462 142545 18661 0 2 0 syz-executor 60462 509468 18661 0 3 0x4000080 ttyopn syz-executor 60462 459081 18661 0 3 0x4000080 fsleep syz-executor 45922 389612 13467 0 2 0 syz-executor 45922 428921 13467 0 3 0x4000080 fsleep syz-executor 45922 371497 13467 0 2 0x4000000 syz-executor 59870 356642 78600 0 2 0 syz-executor 59870 367347 78600 0 3 0x4000080 fsleep syz-executor 45367 354666 0 0 3 0x14280 nfsidl nfsio 66443 234482 0 0 3 0x14280 nfsidl nfsio 83600 219657 0 0 3 0x14280 nfsidl nfsio 91700 139027 0 0 3 0x14280 nfsidl nfsio 58724 430499 0 0 3 0x14280 nfsidl nfsio 31926 363721 0 0 3 0x14280 nfsidl nfsio 40152 360516 0 0 3 0x14280 nfsidl nfsio 33751 241590 0 0 3 0x14280 nfsidl nfsio 64388 119233 0 0 3 0x14280 nfsidl nfsio 70380 201063 0 0 3 0x14280 nfsidl nfsio 68862 481816 0 0 3 0x14280 nfsidl nfsio 62795 149662 0 0 3 0x14280 nfsidl nfsio 45473 210508 0 0 3 0x14280 nfsidl nfsio 3969 343957 0 0 3 0x14280 nfsidl nfsio 11295 132630 0 0 3 0x14280 nfsidl nfsio 32453 367841 0 0 3 0x14280 nfsidl nfsio 38572 33783 0 0 3 0x14280 nfsidl nfsio 51069 102244 0 0 3 0x14280 nfsidl nfsio 60318 301849 0 0 3 0x14280 nfsidl nfsio 71548 75636 0 0 3 0x14280 nfsidl nfsio 60701 262210 1 0 3 0x80 nanoslp init 56523 120604 0 0 3 0x14200 acct acct 84454 151181 71767 0 3 0x100082 sbwait arp 71767 377143 36830 0 3 0x10008a sigsusp sh 8771 18689 21681 0 3 0x82 nanoslp syz-executor 40535 263808 21681 0 3 0x82 nanoslp syz-executor 18661 142294 21681 0 3 0x82 nanoslp syz-executor 78600 321698 21681 0 3 0x82 nanoslp syz-executor 36830 178610 21681 0 3 0x82 wait syz-executor 13467 187206 21681 0 3 0x82 nanoslp syz-executor 21681 484190 1 0 2 0x10000002 syz-executor 43398 235651 0 0 2 0x40014200 smr 45481 388524 0 0 2 0x14200 zerothread 93415 358340 0 0 3 0x14200 aiodoned aiodoned 1935 487609 0 0 3 0x14200 syncer update 70138 438126 0 0 3 0x14200 cleaner cleaner 44981 80234 0 0 3 0x14200 reaper reaper 76813 36224 0 0 3 0x14200 pgdaemon pagedaemon 81374 154672 0 0 3 0x14200 bored viomb 4990 252255 0 0 3 0x40014200 acpi0 acpi0 80190 329082 0 0 3 0x40014200 idle1 90690 10160 0 0 3 0x14200 bored softnet1 49030 106493 0 0 3 0x14200 bored softnet0 77569 469042 0 0 3 0x14200 smrbar systqmp 63468 435731 0 0 3 0x14200 bored systq 28135 397642 0 0 3 0x14200 tmoslp softclockmp 70960 301678 0 0 3 0x40014200 tmoslp softclock 91044 522970 0 0 3 0x40014200 idle0 1 319406 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 77569 (systqmp) thread 0xffff8000ffffea60 (469042) shared rwlock systqmp r = 0 (0xffffffff838879d8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12074K 12458K 166960K 12777 0 pcb 17 12K 12K 166960K 108 0 rtable 160 9K 12K 166960K 436 0 pf 33 17K 21K 166960K 171 0 ifaddr 29 4K 8K 166960K 76 0 ifgroup 43 2K 2K 166960K 123 0 sysctl 4 1K 9K 166960K 12 0 counters 64 36K 38K 166960K 124 0 ioctlops 0 0K 4K 166960K 1835 0 iov 0 0K 16K 166960K 96 0 mount 1 1K 1K 166960K 1 0 log 2 0K 8K 166960K 7 0 vnodes 1395 88K 88K 166960K 2060 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 27 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 53K 93K 166960K 643 0 sigio 0 0K 0K 166960K 3 0 proc 12 17K 164K 166960K 615 0 subproc 54 3K 5K 166960K 189 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 61 0 in_multi 56 4K 7K 166960K 133 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 716 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 122 72K 179K 166960K 7708 0 UVM aobj 14 4K 4K 166960K 17 0 pinsyscall 18 36K 107K 166960K 1832 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 9 0K 1K 166960K 49 0 temp 72 9083K 9152K 166960K 31681 0 kqueue 3 6K 30K 166960K 121 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 59 0 58 1 0 1 1 0 8 0 rtentry 176 128 0 68 5 0 5 5 0 8 0 unpcb 144 549 0 547 6 1 5 6 0 8 4 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 182 0 179 7 2 5 7 0 8 4 arp 136 20 0 9 1 0 1 1 0 8 0 inpcb 328 491 0 487 7 2 5 7 0 8 3 nd6 152 26 0 14 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 21 0 15 1 0 1 1 0 8 0 ppxss 1192 17 0 17 1 0 1 1 0 8 1 pppxif 1576 7 0 7 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 9 0 4 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 48 0 0 1 0 1 1 0 8 0 pfstkey 128 49 0 1 2 0 2 2 0 8 0 pfstate 448 49 0 1 6 0 6 6 0 8 0 pfrule 1360 60 0 54 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 514 0 176 27 0 27 27 0 8 2 art_table 40 517 0 176 5 0 5 5 0 8 0 art_node 32 127 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 14 0 3 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2532 0 1051 93 0 93 93 0 8 0 ffsino 296 2532 0 1051 114 0 114 114 0 8 0 nchpl 144 3420 0 1696 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 3103 0 0 173 0 173 173 0 8 0 namei 1024 11174 0 11174 2 0 2 2 0 8 2 percpumem 16 77 0 30 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 64 0 44 3 0 3 3 0 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 17836 0 17836 11 3 8 8 1 8 8 plimitpl 152 236 0 226 1 0 1 1 0 8 0 sigapl 424 958 0 902 8 1 7 7 0 8 0 knotepl 120 721 0 0 22 0 22 22 0 8 0 kqueuepl 224 175 0 172 2 0 2 2 0 8 1 pipepl 344 193 0 166 4 0 4 4 0 8 0 fdescpl 528 921 0 904 3 0 3 3 0 8 0 filepl 160 5298 0 5163 15 3 12 15 0 8 3 lockfpl 104 424 0 424 2 1 1 2 0 8 1 lockfspl 48 165 0 165 1 0 1 1 0 8 1 sessionpl 144 54 0 51 1 0 1 1 0 8 0 pgrppl 48 81 0 70 1 0 1 1 0 8 0 ucredpl 104 731 0 727 1 0 1 1 0 8 0 zombiepl 144 904 0 902 1 0 1 1 0 8 0 processpl 1232 958 0 902 5 0 5 5 0 8 0 procpl 664 1772 0 1708 6 0 6 6 0 8 0 sosppl 176 4 0 4 2 1 1 1 0 8 1 sockpl 752 1113 0 1106 21 11 10 17 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 40 0 0 5 0 5 5 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 385 0 0 25 0 25 25 0 8 0 bufpl 280 8594 0 2464 438 0 438 438 0 8 0 anonpl 32 9679 0 0 78 0 78 78 0 246 0 amapchunkpl 152 25335 0 25016 29 0 29 29 0 158 14 amappl16 200 3619 0 3602 20 8 12 15 0 8 8 amappl15 192 31 0 31 1 1 0 1 0 8 0 amappl14 184 451 0 450 1 0 1 1 0 8 0 amappl13 176 130 0 129 1 0 1 1 0 8 0 amappl12 168 1188 0 1172 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 72 0 72 1 0 1 1 0 8 1 amappl9 144 259 0 259 1 1 0 1 0 8 0 amappl8 136 113 0 113 1 0 1 1 0 8 1 amappl7 128 186 0 183 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 107 0 106 1 0 1 1 0 8 0 amappl4 104 304 0 300 1 0 1 1 0 8 0 amappl3 96 4733 0 4662 4 0 4 4 0 8 1 amappl2 88 573 0 561 2 0 2 2 0 8 0 amappl1 80 12743 0 12636 17 0 17 17 0 8 8 amappl 88 6802 0 6695 5 0 5 5 0 92 1 uvmvnodes 80 118 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 16 0 3 1 0 1 1 0 8 0 uaddrrnd 24 921 0 903 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 921 0 903 1 0 1 1 0 8 0 vmmpekpl 168 9959 0 9920 3 0 3 3 0 8 0 vmmpepl 168 69114 0 68364 100 0 100 100 0 357 53 vmsppl 488 920 0 903 5 0 5 5 0 8 1 rwobjpl 80 22056 0 21631 28 0 28 28 0 8 1 pdppl 4096 1849 0 1806 103 56 47 85 0 8 4 pvpl 32 18075 0 0 147 1 146 146 0 265 0 pmappl 256 920 0 903 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 303 0 62 8 0 8 8 0 8 0 ddb{1}>