uvm_fault(0xffffffff83a09a38, 0xffff800029e52004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *464661 36570 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a885bf0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff7007f1fc948,ffff80002a885c78,fffff70007ffd6e8,ffff80002a885cbc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736a68,ffff80002a885e00,ffff80002a885d50) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133 syscall(ffff80002a885e00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a885e00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b56ed0f90, count: 10 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(0xffffffff83a09a38, 0xffff800029e52004, 0, 1) -> d ddb> show kasan No such command ddb> trace ufs_readdir(ffff80002a885bf0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff7007f1fc948,ffff80002a885c78,fffff70007ffd6e8,ffff80002a885cbc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736a68,ffff80002a885e00,ffff80002a885d50) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133 syscall(ffff80002a885e00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a885e00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b56ed0f90, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a885be0 rbx 0x200 rdx 0 rcx 0xfffff70064d5c6a8 rax 0xffff800029e52200 r8 0xffffffffffffffff r9 0x2 r10 0xe11d4ae1f84fdad2 r11 0x4c689de011b26c9c r12 0 r13 0xffff80002a885c78 r14 0xffff800029e52000 r15 0xffff800029e52008 rip 0xffffffff82932f0e ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a885a30 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=464661 pid=36570 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a736538,0xffff80002a736018 process=0xffff80002a79f190 user=0xffff80002a880000, vmspace=0xfffff7006fa79cf8 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 42390 23751 5855 0 2 0x100000 0 sh 5855 251484 84120 0 3 0x100002 0x88 sigsusp sh 14285 361277 37933 0 2 0 0 syz-executor 14285 298315 37933 0 3 0 0x4000080 fsleep syz-executor 26969 72443 18327 0 2 0 0 syz-executor 26969 159654 18327 0 3 0 0x4000080 fsleep syz-executor 26969 227881 18327 0 3 0 0x4000080 fsleep syz-executor 95722 151602 51973 0 2 0 0 syz-executor 95722 311122 51973 0 3 0 0x4000080 fsleep syz-executor 87015 313935 98120 0 2 0 0 syz-executor 87015 329926 98120 0 3 0 0x4000080 fsleep syz-executor 84120 34817 9223 0 3 0x2 0x80 wait syz-executor 59088 373408 1 0 3 0 0x80 nanoslp init 75075 435302 0 0 3 0x14000 0x200 acct acct *36570 464661 9223 0 7 0x2 0 syz-executor 18327 469836 9223 0 3 0x2 0x80 nanoslp syz-executor 51973 186359 9223 0 2 0x2 0xc80 syz-executor 98120 68744 9223 0 2 0x2 0xc80 syz-executor 37933 196050 9223 0 2 0x2 0xc80 syz-executor 9223 3192 1 0 3 0x2 0x80 wait syz-executor 57239 503590 0 0 3 0x14000 0x200 bored smr 53645 248632 0 0 2 0x14000 0x200 zerothread 41666 94388 0 0 3 0x14000 0x200 aiodoned aiodoned 94504 110072 0 0 3 0x14000 0x200 syncer update 87895 338932 0 0 3 0x14000 0x200 cleaner cleaner 9005 31545 0 0 3 0x14000 0x200 reaper reaper 36762 219061 0 0 3 0x14000 0x200 pgdaemon pagedaemon 7165 303386 0 0 3 0x14000 0x200 bored viomb 93722 141309 0 0 3 0x14000 0x40000200 acpi0 acpi0 25334 191403 0 0 2 0x14000 0x200 softnet0 63675 78075 0 0 3 0x14000 0x200 bored systqmp 7778 319184 0 0 3 0x14000 0x200 bored systq 43333 226445 0 0 3 0x14000 0x40000200 tmoslp softclock 35971 268577 0 0 3 0x14000 0x40000200 idle0 1 352657 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10010000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11028 12100K 12432K 166960K 13029 0 pcb 17 15K 16K 166960K 199 0 rtable 231 8K 9K 166960K 899 0 pf 35 14K 74K 166960K 139 0 ifaddr 38 6K 8K 166960K 123 0 ifgroup 50 2K 2K 166960K 155 0 sysctl 4 1K 9K 166960K 9 0 counters 33 17K 18K 166960K 69 0 ioctlops 0 0K 4K 166960K 176 0 iov 0 0K 16K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 2 0K 0K 166960K 6 0 vnodes 1464 92K 93K 166960K 2329 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 65 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 15 57K 77K 166960K 940 0 sigio 0 0K 0K 166960K 3 0 proc 11 17K 91K 166960K 1003 0 subproc 72 4K 4K 166960K 216 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 63 0 in_multi 82 6K 7K 166960K 282 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 24 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 624 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 109 78K 170K 166960K 8958 0 UVM aobj 12 2K 2K 166960K 12 0 pinsyscall 17 34K 87K 166960K 2459 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 50 0 NDP 11 0K 2K 166960K 86 0 temp 50 9114K 13208K 166960K 39862 0 kqueue 3 6K 28K 166960K 122 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 120 105 0 105 1 0 1 1 0 8 1 rtentry 136 288 0 191 5 0 5 5 0 8 1 unpcb 144 390 0 390 4 0 4 4 0 8 4 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpcb 736 200 0 198 4 0 4 4 0 8 3 arp 96 49 0 32 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 836 0 831 7 0 7 7 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 6 0 4 1 0 1 1 0 8 0 nd6 112 75 0 55 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 24 0 16 1 0 1 1 0 8 0 ppxss 1072 15 0 15 1 0 1 1 0 8 1 pfstscr 40 36 0 16 1 0 1 1 0 8 0 pfrktable 1344 5 0 5 1 0 1 1 0 8 1 pfsrclim 320 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 9 0 4 1 0 1 1 0 8 0 pftag 88 3 0 2 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 16 0 9 1 0 1 1 0 8 0 pfstkey 128 32 0 26 1 0 1 1 0 8 0 pfstate 384 18 0 8 2 0 2 2 0 8 0 pfrule 1360 11 0 11 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1192 0 814 32 0 32 32 0 8 6 art_table 40 1194 0 814 6 0 6 6 0 8 1 art_node 32 287 0 198 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 5 1 0 1 1 0 8 0 semapl 72 61 0 51 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2846 0 1360 94 0 94 94 0 8 0 ffsino 256 2850 0 1364 94 0 94 94 0 8 0 nchpl 144 3825 0 2073 65 0 65 65 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 vnodes 216 3555 0 0 198 0 198 198 0 8 0 namei 1024 14062 0 14062 2 0 2 2 0 8 2 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 81 0 58 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 17319 0 17319 8 0 8 8 1 8 8 plimitpl 152 281 0 272 1 0 1 1 0 8 0 sigapl 424 1231 0 1199 8 0 8 8 0 8 2 knotepl 120 33420 0 33238 12 2 10 12 0 8 4 kqueuepl 184 255 0 251 4 0 4 4 0 8 3 pipepl 304 216 0 189 3 0 3 3 0 8 0 fdescpl 448 1196 0 1178 4 0 4 4 0 8 0 filepl 120 6585 0 6429 17 2 15 17 0 8 8 lockfpl 104 364 0 364 2 0 2 2 0 8 2 lockfspl 48 164 0 164 1 0 1 1 0 8 1 sessionpl 144 61 0 58 1 0 1 1 0 8 0 pgrppl 48 91 0 80 1 0 1 1 0 8 0 ucredpl 104 1046 0 1043 1 0 1 1 0 8 0 zombiepl 144 1201 0 1199 1 0 1 1 0 8 0 processpl 1152 1231 0 1199 5 0 5 5 0 8 1 procpl 664 2052 0 2015 7 0 7 7 0 8 3 sockpl 552 1389 0 1384 8 0 8 8 0 8 6 mcl64k 65536 137 0 136 1 0 1 1 0 8 0 mcl16k 16384 11 0 11 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 89 0 89 1 0 1 1 0 8 1 mcl4k 4096 3360 0 3302 14 0 14 14 0 8 5 mcl2k2 2112 4 0 4 1 0 1 1 0 8 1 mcl2k 2048 774 0 774 2 0 2 2 0 8 2 mextrefs 64 388 0 387 1 0 1 1 0 8 0 mtagpl 96 8 0 7 1 0 1 1 0 8 0 mbufpl 256 11717 0 11553 20 0 20 20 0 8 5 bufpl 272 6515 0 299 415 0 415 415 0 8 0 anonpl 24 168199 0 166819 53 0 53 53 0 187 28 amapchunkpl 152 35676 0 35390 41 0 41 41 0 158 27 amappl16 200 2562 0 2538 20 9 11 20 0 8 8 amappl15 192 3 0 3 1 0 1 1 0 8 1 amappl14 184 598 0 597 1 0 1 1 0 8 0 amappl13 176 161 0 161 1 0 1 1 0 8 1 amappl12 168 1514 0 1499 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 60 0 60 1 0 1 1 0 8 1 amappl9 144 272 0 272 1 0 1 1 0 8 1 amappl8 136 158 0 158 1 0 1 1 0 8 1 amappl7 128 174 0 171 1 0 1 1 0 8 0 amappl6 120 305 0 303 1 0 1 1 0 8 0 amappl5 112 106 0 105 1 0 1 1 0 8 0 amappl4 104 308 0 305 1 0 1 1 0 8 0 amappl3 96 5729 0 5666 4 0 4 4 0 8 1 amappl2 88 659 0 650 2 0 2 2 0 8 0 amappl1 80 14426 0 14337 13 0 13 13 0 8 6 amappl 88 7894 0 7796 4 0 4 4 0 92 0 uvmvnodes 80 113 0 0 3 0 3 3 0 8 0 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 128 253 0 253 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1196 0 1178 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1196 0 1178 1 0 1 1 0 8 0 vmmpekpl 168 10587 0 10544 3 0 3 3 0 8 0 vmmpepl 168 81884 0 81181 93 0 93 93 0 357 53 vmsppl 368 1195 0 1178 3 0 3 3 0 8 0 rwobjpl 40 23739 0 23344 14 0 14 14 0 8 2 pdppl 4096 2398 0 2356 114 66 48 72 0 8 6 pvpl 32 490339 0 486758 115 0 115 115 0 265 60 pmappl 216 1195 0 1178 2 0 2 2 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 811 0 66 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a885bf0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff7007f1fc948,ffff80002a885c78,fffff70007ffd6e8,ffff80002a885cbc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736a68,ffff80002a885e00,ffff80002a885d50) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133 syscall(ffff80002a885e00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a885e00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b56ed0f90, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a885bf0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff7007f1fc948,ffff80002a885c78,fffff70007ffd6e8,ffff80002a885cbc) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736a68,ffff80002a885e00,ffff80002a885d50) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3133 syscall(ffff80002a885e00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a885e00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b2b56ed0f90, count: -5 ddb>