uvm_fault(0xffffffff83a0a918, 0xffff8000289b2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs_freefile+0x11e: movl 0x4(%rbx),%r13d TID PID UID PRFLAGS PFLAGS CPU COMMAND *474859 98613 0 0x2 0 0 syz-executor ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffff200600bfc00,4ea,8000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a81ba40) at ufs_inactive+0x299 sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffff2006250f978,ffff80002a7267d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff2006250f978) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff2006250f390,fffff2006250f978,ffff80002a81bba8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7267d0,ffffff9c,7f52b4c45c80,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a81bd10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81bd10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f52b4c46130, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83a0a918, 0xffff8000289b2004, 0, 1) -> d ddb> trace ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffff200600bfc00,4ea,8000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a81ba40) at ufs_inactive+0x299 sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffff2006250f978,ffff80002a7267d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff2006250f978) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff2006250f390,fffff2006250f978,ffff80002a81bba8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7267d0,ffffff9c,7f52b4c45c80,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a81bd10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81bd10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f52b4c46130, count: -9 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a81b980 rbx 0xffff8000289b2000 rdx 0 rcx 0xfffff20040663bf0 rax 0xfffff2005e1c6340 r8 0xffffffffffffffff r9 0 r10 0xbb606f6de938c270 r11 0x6b76040b5172be13 r12 0 r13 0 r14 0xffff800000c47800 r15 0x4ea rip 0xffffffff81f96c7e ffs_freefile+0x11e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a81b8f0 ss 0x10 ffs_freefile+0x11e: movl 0x4(%rbx),%r13d ddb> show proc PROC (syz-executor) tid=474859 pid=98613 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7574d0,0xffff80002a726a78 process=0xffff80002a78e410 user=0xffff80002a816000, vmspace=0xfffff200758e0b88 estcpu=36, cpticks=13, pctcpu=0.1, user=0, sys=13, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86941 332348 6622 0 2 0x100002 sh 46988 303472 49346 0 2 0 syz-executor 46988 229901 49346 0 3 0x4000088 kqpoll syz-executor 46988 28731 49346 0 3 0x4000088 kqpoll syz-executor 96900 509872 94635 0 2 0 syz-executor 96900 483025 94635 0 3 0x4000080 fsleep syz-executor 42221 225969 69177 0 2 0 syz-executor 42221 370286 69177 0 2 0x4000000 syz-executor 75558 395898 99436 0 3 0x80 nanoslp syz-executor 75558 440012 99436 0 3 0x4000080 ttyretype syz-executor 8040 119844 65642 0 2 0 syz-executor 6622 172319 64891 0 3 0x82 wait syz-executor 32838 273125 1 0 3 0x100083 ttyin getty 45564 311726 0 0 3 0x14200 acct acct 99436 47927 64891 0 3 0x82 nanoslp syz-executor 69177 355100 64891 0 3 0x82 nanoslp syz-executor 94635 424920 64891 0 3 0x82 nanoslp syz-executor *98613 474859 64891 0 7 0x2 syz-executor 49346 328466 64891 0 3 0x82 nanoslp syz-executor 65642 130240 64891 0 2 0xc82 syz-executor 64891 190484 12820 0 2 0x2 syz-executor 12820 185910 2393 0 3 0x10008a sigsusp ksh 2393 284966 31945 0 3 0x98 kqread sshd-session 31945 501457 26878 0 3 0x92 kqread sshd-session 26878 84668 1 0 3 0x88 kqread sshd 75111 478553 18737 73 3 0x1100090 kqread syslogd 18737 176066 1 0 3 0x100082 sbwait syslogd 37627 464591 1 0 3 0x100080 kqread resolvd 72370 128058 1145 77 3 0x100092 kqread dhcpleased 35005 343368 1145 77 3 0x100092 kqread dhcpleased 1145 117861 1 0 3 0x80 kqread dhcpleased 66773 365945 0 0 3 0x14200 bored smr 81381 78172 0 0 2 0x14200 zerothread 9171 43275 0 0 3 0x14200 aiodoned aiodoned 76037 381641 0 0 3 0x14200 syncer update 20795 511198 0 0 3 0x14200 cleaner cleaner 86828 165664 0 0 3 0x14200 reaper reaper 30851 407920 0 0 3 0x14200 pgdaemon pagedaemon 67532 404037 0 0 3 0x14200 bored viomb 46415 116293 0 0 3 0x40014200 acpi0 acpi0 88876 121831 0 0 2 0x14200 softnet0 11139 463850 0 0 3 0x14200 smrbar systqmp 5390 71075 0 0 3 0x14200 bored systq 79379 312665 0 0 3 0x40014200 tmoslp softclock 80072 237308 0 0 3 0x40014200 idle0 1 44109 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11063 12117K 12320K 166960K 12806 0 pcb 18 12K 12K 166960K 95 0 rtable 217 7K 9K 166960K 795 0 pf 34 13K 20K 166960K 176 0 ifaddr 37 6K 8K 166960K 114 0 ifgroup 48 2K 2K 166960K 138 0 sysctl 1 1K 9K 166960K 9 0 counters 33 17K 18K 166960K 62 0 ioctlops 0 0K 4K 166960K 173 0 iov 0 0K 16K 166960K 90 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1322 83K 84K 166960K 1989 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 66 0 dirhash 15 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 77K 166960K 804 0 sigio 0 0K 0K 166960K 6 0 proc 60 59K 75K 166960K 924 0 subproc 72 4K 4K 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 169 0 in_multi 77 5K 7K 166960K 260 0 ether_multi 1 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 630 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 197 159K 174K 166960K 8113 0 UVM aobj 17 6K 6K 166960K 19 0 pinsyscall 37 74K 87K 166960K 2240 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 1K 166960K 79 0 temp 50 9114K 9178K 166960K 13568 0 kqueue 14 22K 34K 166960K 129 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 153 0 150 3 0 3 3 0 8 2 rtentry 136 261 0 169 4 0 4 4 0 8 0 unpcb 144 240 0 225 1 0 1 1 0 8 0 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 217 0 213 7 0 7 7 0 8 6 arp 96 43 0 28 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 7 0 3 1 0 1 1 0 8 0 inpcb 328 595 0 587 7 0 7 7 0 8 5 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 3 0 3 1 0 1 1 0 8 1 nd6 112 67 0 47 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 ppxss 1072 12 0 11 1 0 1 1 0 8 0 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 9 0 4 1 0 1 1 0 8 0 pfsrclim 320 10 0 9 1 0 1 1 0 8 0 pfstlim 224 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 8 0 0 1 0 1 1 0 8 0 pfstkey 128 14 0 6 1 0 1 1 0 8 0 pfstate 384 7 0 3 1 0 1 1 0 8 0 pfrule 1360 41 0 40 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1091 0 718 32 0 32 32 0 8 6 art_table 40 1092 0 718 6 0 6 6 0 8 1 art_node 32 260 0 176 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 60 0 50 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 23 0 4 3 0 3 3 0 8 0 dino2pl 256 2530 0 1041 94 0 94 94 0 8 0 ffsino 256 2530 0 1041 94 0 94 94 0 8 0 nchpl 144 3403 0 1669 65 0 65 65 0 8 0 vnodes 216 3007 0 0 168 0 168 168 0 8 0 namei 1024 12959 0 12959 2 0 2 2 0 8 2 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 73 0 50 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 19071 0 19071 8 0 8 8 1 8 8 plimitpl 152 118 0 101 1 0 1 1 0 8 0 sigapl 424 1078 0 1036 6 0 6 6 0 8 1 knotepl 120 21084 0 21036 10 0 10 10 0 8 6 kqueuepl 184 170 0 157 1 0 1 1 0 8 0 pipepl 304 185 0 158 3 0 3 3 0 8 0 fdescpl 448 1064 0 1036 4 0 4 4 0 8 0 filepl 120 5302 0 5030 12 0 12 12 0 8 0 lockfpl 104 290 0 286 2 0 2 2 0 8 0 lockfspl 48 93 0 89 1 0 1 1 0 8 0 sessionpl 144 58 0 50 1 0 1 1 0 8 0 pgrppl 48 79 0 63 1 0 1 1 0 8 0 ucredpl 104 971 0 960 1 0 1 1 0 8 0 zombiepl 144 1037 0 1036 1 0 1 1 0 8 0 processpl 1152 1078 0 1036 4 0 4 4 0 8 0 procpl 664 1809 0 1762 6 0 6 6 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 552 1008 0 982 7 0 7 7 0 8 4 mcl64k 65536 94 0 94 1 0 1 1 0 8 1 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 12 0 12 1 0 1 1 0 8 1 mcl4k 4096 3196 0 3142 14 0 14 14 0 8 6 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 737 0 736 1 0 1 1 0 8 0 mtagpl 96 13 0 11 1 0 1 1 0 8 0 mbufpl 256 10546 0 10387 21 0 21 21 0 8 7 bufpl 272 9408 0 3193 415 0 415 415 0 8 0 anonpl 24 165570 0 162597 59 0 59 59 0 88 25 amapchunkpl 152 25479 0 25098 30 0 30 30 0 158 13 amappl16 200 2917 0 2888 22 8 14 16 0 8 8 amappl15 192 4 0 4 1 0 1 1 0 8 1 amappl14 184 577 0 574 1 0 1 1 0 8 0 amappl13 176 142 0 132 1 0 1 1 0 8 0 amappl12 168 1351 0 1325 2 0 2 2 0 8 0 amappl11 160 18 0 18 1 0 1 1 0 8 1 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 267 0 267 1 0 1 1 0 8 1 amappl8 136 148 0 146 1 0 1 1 0 8 0 amappl7 128 197 0 185 1 0 1 1 0 8 0 amappl6 120 277 0 275 1 0 1 1 0 8 0 amappl5 112 178 0 170 1 0 1 1 0 8 0 amappl4 104 298 0 282 1 0 1 1 0 8 0 amappl3 96 5032 0 4941 4 0 4 4 0 8 1 amappl2 88 742 0 685 2 0 2 2 0 8 0 amappl1 80 13683 0 13140 13 0 13 13 0 8 1 amappl 88 7128 0 6996 5 0 5 5 0 92 1 uvmvnodes 80 113 0 0 3 0 3 3 0 8 0 dma65536 65536 2 0 2 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 18 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1064 0 1036 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1064 0 1036 1 0 1 1 0 8 0 vmmpekpl 168 9520 0 9478 3 0 3 3 0 8 0 vmmpepl 168 74957 0 73278 91 0 91 91 0 357 12 vmsppl 368 1063 0 1036 3 0 3 3 0 8 0 rwobjpl 40 22536 0 21582 13 0 13 13 0 8 0 pdppl 4096 2134 0 2072 110 42 68 72 0 8 6 pvpl 32 459759 0 451830 136 0 136 136 0 265 50 pmappl 216 1063 0 1036 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 810 0 42 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffff200600bfc00,4ea,8000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a81ba40) at ufs_inactive+0x299 sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffff2006250f978,ffff80002a7267d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff2006250f978) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff2006250f390,fffff2006250f978,ffff80002a81bba8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7267d0,ffffff9c,7f52b4c45c80,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a81bd10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81bd10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f52b4c46130, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_freefile(fffff200600bfc00,4ea,8000) at ffs_freefile+0x11e sys/ufs/ffs/ffs_alloc.c:1377 ffs_inode_free(fffff200600bfc00,4ea,8000) at ffs_inode_free+0x44 sys/ufs/ffs/ffs_alloc.c:1355 ufs_inactive(ffff80002a81ba40) at ufs_inactive+0x299 sys/ufs/ufs/ufs_inode.c:94 VOP_INACTIVE(fffff2006250f978,ffff80002a7267d0) at VOP_INACTIVE+0xfb sys/kern/vfs_vops.c:498 vput(fffff2006250f978) at vput+0xdc sys/kern/vfs_subr.c:789 VOP_REMOVE(fffff2006250f390,fffff2006250f978,ffff80002a81bba8) at VOP_REMOVE+0x199 sys/kern/vfs_vops.c:336 dounlinkat(ffff80002a7267d0,ffffff9c,7f52b4c45c80,0) at dounlinkat+0x1c4 sys/kern/vfs_syscalls.c:1842 syscall(ffff80002a81bd10) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a81bd10) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f52b4c46130, count: -9