uvm_fault(0xffffffff82dbb378, 0xffff8000216b2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x49b: movzwl 0x4(%r15,%rbx,1),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND * 90774 16094 0 0 0x4000000 0 syz-executor.4 ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd80718b1c20,ffff80002d918e78,ffff80002d918e18) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8069471018,ffff80002c107000) at unveil_find_cover+0x132 sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80002c107000,fffffd8069471018) at unveil_add_vnode+0xac sys/kern/kern_unveil.c:391 unveil_add(ffff80002c107000,ffff80002d919018,ffff80002d9190d3) at unveil_add+0x30b sys/kern/kern_unveil.c:494 sys_unveil(ffff80002c107000,ffff80002d9191f0,ffff80002d919140) at sys_unveil+0x41b sys/kern/vfs_syscalls.c:1023 syscall(ffff80002d9191f0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf02ca19d350, count: 7 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(0xffffffff82dbb378, 0xffff8000216b2004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd80718b1c20,ffff80002d918e78,ffff80002d918e18) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8069471018,ffff80002c107000) at unveil_find_cover+0x132 sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80002c107000,fffffd8069471018) at unveil_add_vnode+0xac sys/kern/kern_unveil.c:391 unveil_add(ffff80002c107000,ffff80002d919018,ffff80002d9190d3) at unveil_add+0x30b sys/kern/kern_unveil.c:494 sys_unveil(ffff80002c107000,ffff80002d9191f0,ffff80002d919140) at sys_unveil+0x41b sys/kern/vfs_syscalls.c:1023 syscall(ffff80002d9191f0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf02ca19d350, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002d918d90 rbx 0 rdx 0xffff800000decac0 rcx 0xffffffff rax 0xfffffd80718a8148 r8 0xffffffffffffffff r9 0xfffffd807f7d7a28 r10 0x4457f2ad22dc37c0 r11 0xaabc37a92bc71d22 r12 0 r13 0xfffffd8071899b48 r14 0 r15 0xffff8000216b2000 rip 0xffffffff8279edeb ufs_lookup+0x49b cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002d918c80 ss 0x10 ufs_lookup+0x49b: movzwl 0x4(%r15,%rbx,1),%r14d ddb> show proc PROC (syz-executor.4) tid=90774 pid=16094 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002c106010,0xffffffff82e56940 process=0xffff80002db625c8 user=0xffff80002d914000, vmspace=0xfffffd806f1f8588 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16094 189197 69721 0 2 0 syz-executor.4 *16094 90774 69721 0 7 0x4000000 syz-executor.4 32806 122884 21054 0 2 0x480 syz-executor.2 32806 223819 21054 0 3 0x4000080 fsleep syz-executor.2 73179 103517 50724 0 2 0 syz-executor.5 73179 15591 50724 0 3 0x4000080 fsleep syz-executor.5 99744 464209 26622 0 2 0x480 syz-executor.3 99744 307205 26622 0 3 0x4000080 netio syz-executor.3 99744 72996 26622 0 3 0x4000080 fsleep syz-executor.3 18685 420282 0 0 3 0x14200 acct acct 8925 497625 53734 0 2 0x2 syz-executor.0 89713 291186 1 0 3 0x18100083 ttyin getty 26622 110604 53734 0 2 0x482 syz-executor.3 47086 186449 0 0 3 0x14280 nfsidl nfsio 53479 513162 0 0 3 0x14280 nfsidl nfsio 48285 487158 0 0 3 0x14280 nfsidl nfsio 22744 107 0 0 3 0x14280 nfsidl nfsio 88798 236537 0 0 3 0x14280 nfsidl nfsio 23194 447507 0 0 3 0x14280 nfsidl nfsio 97921 475032 0 0 3 0x14280 nfsidl nfsio 71592 459909 0 0 3 0x14280 nfsidl nfsio 68964 202870 0 0 3 0x14280 nfsidl nfsio 72700 310892 0 0 3 0x14280 nfsidl nfsio 23853 473868 0 0 3 0x14280 nfsidl nfsio 91618 225857 0 0 3 0x14280 nfsidl nfsio 70835 448697 0 0 3 0x14280 nfsidl nfsio 71012 382529 0 0 3 0x14280 nfsidl nfsio 89164 90849 0 0 3 0x14280 nfsidl nfsio 60792 235080 0 0 3 0x14280 nfsidl nfsio 16466 42570 0 0 3 0x14280 nfsidl nfsio 72042 139835 0 0 3 0x14280 nfsidl nfsio 57822 423529 0 0 3 0x14280 nfsidl nfsio 93087 184657 0 0 3 0x14280 nfsidl nfsio 50724 83509 53734 0 2 0x482 syz-executor.5 28515 165486 53734 0 2 0x482 syz-executor.6 27829 20128 0 0 3 0x14200 bored sosplice 2821 411542 53734 0 2 0x482 syz-executor.7 69721 12251 53734 0 3 0x82 nanoslp syz-executor.4 21054 284578 53734 0 3 0x82 nanoslp syz-executor.2 3325 444305 53734 0 2 0x482 syz-executor.1 53734 85958 24446 0 3 0x1a000082 wait syz-fuzzer 53734 395460 24446 0 3 0x1e000082 nanoslp syz-fuzzer 53734 414588 24446 0 3 0x1e000082 wait syz-fuzzer 53734 260004 24446 0 3 0x1e000082 wait syz-fuzzer 53734 150802 24446 0 3 0x1e000082 thrsleep syz-fuzzer 53734 272370 24446 0 3 0x1e000082 thrsleep syz-fuzzer 53734 298928 24446 0 3 0x1e000082 wait syz-fuzzer 53734 280647 24446 0 3 0x1e000082 wait syz-fuzzer 53734 464565 24446 0 3 0x1e000082 wait syz-fuzzer 53734 226181 24446 0 3 0x1e000082 kqread syz-fuzzer 53734 41185 24446 0 3 0x1e000082 thrsleep syz-fuzzer 53734 424007 24446 0 3 0x1e000082 wait syz-fuzzer 53734 513789 24446 0 3 0x1e000082 wait syz-fuzzer 53734 467553 24446 0 3 0x1e000082 thrsleep syz-fuzzer 24446 313889 83227 0 3 0x810008a sigsusp ksh 83227 228687 17706 0 3 0x1800009a kqread sshd 17706 262344 1 0 3 0x18000088 kqread sshd 79602 25651 55504 73 3 0x19100090 kqread syslogd 55504 79503 1 0 3 0x18100082 netio syslogd 58293 234545 1 0 3 0x18100080 kqread resolvd 9615 465267 69554 77 3 0x18100092 kqread dhcpleased 14281 455382 69554 77 3 0x18100092 kqread dhcpleased 69554 449528 1 0 3 0x18000080 kqread dhcpleased 99416 393502 0 0 3 0x14200 bored smr 27091 113046 0 0 2 0x14200 zerothread 44561 48212 0 0 3 0x14200 aiodoned aiodoned 14357 493619 0 0 3 0x14200 syncer update 83761 401728 0 0 3 0x14200 cleaner cleaner 90165 315972 0 0 3 0x14200 reaper reaper 899 22148 0 0 3 0x14200 pgdaemon pagedaemon 46908 480502 0 0 3 0x14200 bored viomb 86004 278289 0 0 3 0x40014200 acpi0 acpi0 67359 506846 0 0 3 0x14200 bored softnet3 17952 1865 0 0 3 0x14200 bored softnet2 18714 261990 0 0 3 0x14200 bored softnet1 10180 207458 0 0 3 0x14200 bored softnet0 82377 215614 0 0 3 0x14200 bored systqmp 80346 518111 0 0 3 0x14200 bored systq 99135 58666 0 0 3 0x40014200 tmoslp softclock 16859 228436 0 0 3 0x40014200 idle0 1 119644 0 0 3 0x8000082 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 10186 6611K 6988K 166960K 16342 0 pcb 15 16K 18K 166960K 388 0 rtable 185 5K 6K 166960K 1018 0 pf 28 8K 9K 166960K 95 0 ifaddr 35 10K 11K 166960K 98 0 ifgroup 47 2K 2K 166960K 168 0 sysctl 1 0K 1K 166960K 4 0 counters 29 17K 17K 166960K 59 0 ioctlops 0 0K 2K 166960K 167 0 iov 1 0K 16K 166960K 333 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1429 90K 91K 166960K 2834 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 32 0 VM map 2 1K 1K 166960K 2 0 sem 11 1K 1K 166960K 13 0 dirhash 6 1K 2K 166960K 18 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 77K 166960K 2887 0 sigio 0 0K 0K 166960K 39 0 proc 62 67K 75K 166960K 752 0 subproc 104 6K 6K 166960K 182 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 140 0 in_multi 76 5K 7K 166960K 198 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 860 0 pfkey data 0 0K 0K 166960K 64 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 361 200K 208K 166960K 28316 0 UVM aobj 131 8K 8K 166960K 131 0 pinsyscall 22 44K 100K 166960K 1361 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 71 0 NDP 10 0K 2K 166960K 68 0 temp 74 6804K 7088K 166960K 40612 0 kqueue 12 18K 24K 166960K 189 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 120 141 0 138 1 0 1 1 0 8 0 rtentry 112 334 0 250 4 0 4 4 0 8 0 unpcb 144 3131 0 3111 6 0 6 6 0 8 5 syncache 336 37 0 37 1 0 1 1 0 8 1 tcpqe 32 227 87 227 1 0 1 1 0 8 1 tcpcb 808 796 0 761 12 0 12 12 0 8 7 arp 88 36 0 24 1 0 1 1 0 8 0 ipq 40 10 0 9 1 0 1 1 0 8 0 ipqe 40 23 0 22 1 0 1 1 0 8 0 inpcb 360 2469 0 2431 11 0 11 11 0 8 5 nd6 104 45 0 27 1 0 1 1 0 8 0 pkpcb 40 39 0 39 1 0 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 ppxss 1072 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1148 0 781 29 0 29 29 0 8 3 art_table 32 1149 0 781 4 0 4 4 0 8 0 art_node 16 329 0 253 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 21 0 17 3 0 3 3 0 8 1 dino2pl 256 5226 0 3698 96 0 96 96 0 8 0 ffsino 240 5226 0 3698 91 0 91 91 0 8 0 nchpl 144 9102 0 7372 66 0 66 66 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 31655 0 31652 3 0 3 3 0 8 2 vcpupl 2048 20 0 0 3 0 3 3 0 8 0 vmpool 664 20 0 0 2 0 2 2 0 8 0 kstatmem 264 80 0 60 2 0 2 2 0 8 0 scxspl 216 30422 0 30422 8 0 8 8 1 8 8 plimitpl 152 315 0 299 1 0 1 1 0 8 0 sigapl 424 3186 0 3120 8 0 8 8 0 8 0 futexpl 64 26013 0 26010 1 0 1 1 0 8 0 knotepl 120 28010 0 27928 11 0 11 11 0 8 7 kqueuepl 184 291 0 283 2 0 2 2 0 8 1 pipepl 288 594 0 566 7 0 7 7 0 8 4 fdescpl 432 3148 0 3123 4 0 4 4 0 8 0 filepl 120 19138 0 18898 17 0 17 17 0 8 8 lockfpl 104 533 0 531 1 0 1 1 0 8 0 lockfspl 48 251 0 249 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 52 0 36 1 0 1 1 0 8 0 ucredpl 104 2195 0 2185 1 0 1 1 0 8 0 zombiepl 144 3123 0 3120 1 0 1 1 0 8 0 processpl 1072 3186 0 3120 5 0 5 5 0 8 0 procpl 680 7230 0 7146 9 0 9 9 0 8 1 sosppl 168 39 0 39 1 0 1 1 0 8 1 sockpl 488 5780 0 5719 89 72 17 27 0 8 8 mcl64k 65536 117 0 117 1 0 1 1 0 8 1 mcl16k 16384 49 0 49 1 0 1 1 0 8 1 mcl12k 12288 107 0 107 1 0 1 1 0 8 1 mcl9k 9216 43 0 43 1 0 1 1 0 8 1 mcl8k 8192 206 0 206 1 0 1 1 0 8 1 mcl4k 4096 331 0 331 1 0 1 1 0 8 1 mcl2k2 2112 11 0 11 1 0 1 1 0 8 1 mcl2k 2048 76014 0 75961 39 23 16 30 0 8 8 mtagpl 96 388 0 197 7 0 7 7 0 8 0 mbufpl 256 144600 0 144291 80 40 40 74 0 8 8 bufpl 280 10458 0 4115 454 0 454 454 0 8 0 anonpl 24 426208 0 412402 108 0 108 108 0 188 14 amapchunkpl 152 90008 0 89169 39 0 39 39 0 158 2 amappl16 200 9697 0 9261 36 4 32 36 0 8 8 amappl15 192 49 0 48 1 0 1 1 0 8 0 amappl14 184 200 0 189 2 0 2 2 0 8 1 amappl13 176 52 0 51 1 0 1 1 0 8 0 amappl12 168 3852 0 3825 2 0 2 2 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 48 0 40 1 0 1 1 0 8 0 amappl9 144 203 0 202 1 0 1 1 0 8 0 amappl8 136 216 0 158 3 0 3 3 0 8 0 amappl7 128 59 0 50 1 0 1 1 0 8 0 amappl6 120 449 0 427 2 0 2 2 0 8 0 amappl5 112 234 0 222 1 0 1 1 0 8 0 amappl4 104 588 0 557 2 0 2 2 0 8 1 amappl3 96 18167 0 18088 3 0 3 3 0 8 0 amappl2 88 3679 0 3608 4 0 4 4 0 8 1 amappl1 80 19443 0 18954 21 1 20 21 0 8 8 amappl 88 27657 0 27431 6 0 6 6 0 92 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 3168 0 3123 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3168 0 3123 1 0 1 1 0 8 0 vmmpekpl 168 26319 0 26256 4 0 4 4 0 8 0 vmmpepl 168 205290 0 203149 131 0 131 131 0 357 27 vmsppl 352 3167 0 3123 5 0 5 5 0 8 0 rwobjpl 24 59214 0 51723 46 0 46 46 0 8 0 pdppl 4096 6342 0 6266 244 160 84 86 0 8 8 pvpl 32 1052253 0 1033117 375 28 347 375 0 265 181 pmappl 216 3167 0 3123 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 625 0 223 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd80718b1c20,ffff80002d918e78,ffff80002d918e18) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8069471018,ffff80002c107000) at unveil_find_cover+0x132 sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80002c107000,fffffd8069471018) at unveil_add_vnode+0xac sys/kern/kern_unveil.c:391 unveil_add(ffff80002c107000,ffff80002d919018,ffff80002d9190d3) at unveil_add+0x30b sys/kern/kern_unveil.c:494 sys_unveil(ffff80002c107000,ffff80002d9191f0,ffff80002d919140) at sys_unveil+0x41b sys/kern/vfs_syscalls.c:1023 syscall(ffff80002d9191f0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf02ca19d350, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd80718b1c20,ffff80002d918e78,ffff80002d918e18) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd8069471018,ffff80002c107000) at unveil_find_cover+0x132 sys/kern/kern_unveil.c:277 unveil_add_vnode(ffff80002c107000,fffffd8069471018) at unveil_add_vnode+0xac sys/kern/kern_unveil.c:391 unveil_add(ffff80002c107000,ffff80002d919018,ffff80002d9190d3) at unveil_add+0x30b sys/kern/kern_unveil.c:494 sys_unveil(ffff80002c107000,ffff80002d9191f0,ffff80002d919140) at sys_unveil+0x41b sys/kern/vfs_syscalls.c:1023 syscall(ffff80002d9191f0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf02ca19d350, count: -8