uvm_fault(0xffffffff82d410c0, 0xffff800029cb2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *479883 64296 0 0x2 0 0K syz-executor.3 ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8069081448,ffff80002d8f8698,ffff80002d8f86c8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002d8f8668) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002d8f8668) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a21ad48,ffffff9c,7a71264fa010,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002d8f8820) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a71264fa000, count: 8 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82d410c0, 0xffff800029cb2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8069081448,ffff80002d8f8698,ffff80002d8f86c8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002d8f8668) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002d8f8668) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a21ad48,ffffff9c,7a71264fa010,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002d8f8820) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a71264fa000, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002d8f84a0 rbx 0 rdx 0 rcx 0 rax 0xfffffd8066d3d908 r8 0xffffffffffffffff r9 0xfffffd807f7d7750 r10 0xd66e5d4ce83b5bc9 r11 0x8f278aa7f92bb52 r12 0 r13 0xffffffff r14 0 r15 0xffff800029cb2000 rip 0xffffffff81d6e110 ufs_lookup+0x4d0 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002d8f83a0 ss 0x10 ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx ddb{0}> show proc PROC (syz-executor.3) tid=479883 pid=64296 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002d6d27e8,0xffff80002a24a2a8 process=0xffff8000ffff29f8 user=0xffff80002d8f3000, vmspace=0xfffffd806ba133c8 estcpu=0, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *64296 479883 39624 0 7 0x2 syz-executor.3 57222 315315 39624 0 3 0x82 wait syz-executor.7 36893 20792 0 0 3 0x14280 nfsidl nfsio 35854 276150 0 0 3 0x14280 nfsidl nfsio 3975 170543 0 0 3 0x14280 nfsidl nfsio 96721 191842 0 0 3 0x14280 nfsidl nfsio 89714 407717 0 0 3 0x14280 nfsidl nfsio 99745 177669 0 0 3 0x14280 nfsidl nfsio 74644 63935 0 0 3 0x14280 nfsidl nfsio 84864 209581 0 0 3 0x14280 nfsidl nfsio 5250 116478 0 0 3 0x14280 nfsidl nfsio 35930 77085 0 0 3 0x14280 nfsidl nfsio 27254 184189 0 0 3 0x14280 nfsidl nfsio 55290 298666 0 0 3 0x14280 nfsidl nfsio 82862 102385 0 0 3 0x14280 nfsidl nfsio 80336 87197 0 0 3 0x14280 nfsidl nfsio 69973 151840 0 0 3 0x14280 nfsidl nfsio 80360 345571 0 0 3 0x14280 nfsidl nfsio 52887 493123 0 0 3 0x14280 nfsidl nfsio 39560 104272 0 0 3 0x14280 nfsidl nfsio 88060 517711 0 0 3 0x14280 nfsidl nfsio 28678 446739 0 0 3 0x14280 nfsidl nfsio 62511 470146 0 0 3 0x14200 bored sosplice 5238 139730 39624 0 3 0x82 piperd syz-executor.1 91282 189291 35531 0 3 0x100082 netio arp 87516 160133 80929 0 3 0x100082 netio arp 43444 222936 39624 0 3 0x82 piperd syz-executor.6 80929 407425 1 0 3 0x10008a sigsusp sh 35531 243453 1 0 3 0x10008a sigsusp sh 24759 110569 39624 0 3 0x82 piperd syz-executor.2 23316 467078 39624 0 3 0x82 piperd syz-executor.5 11984 229628 39624 0 3 0x82 piperd syz-executor.4 39624 368667 49539 0 3 0x2000082 thrsleep syz-fuzzer 39624 472071 49539 0 2 0x6000002 syz-fuzzer 39624 397456 49539 0 2 0x6000002 syz-fuzzer 39624 55631 49539 0 3 0x6000082 thrsleep syz-fuzzer 39624 448733 49539 0 3 0x6000082 wait syz-fuzzer 39624 437877 49539 0 3 0x6000082 thrsleep syz-fuzzer 39624 358076 49539 0 3 0x6000082 wait syz-fuzzer 39624 470794 49539 0 3 0x6000082 wait syz-fuzzer 39624 237098 49539 0 3 0x6000082 wait syz-fuzzer 39624 121717 49539 0 3 0x6000082 wait syz-fuzzer 39624 439739 49539 0 3 0x6000082 thrsleep syz-fuzzer 39624 7403 49539 0 3 0x6000082 thrsleep syz-fuzzer 39624 64747 49539 0 3 0x6000082 wait syz-fuzzer 39624 97125 49539 0 3 0x6000082 wait syz-fuzzer 39624 6658 49539 0 3 0x6000082 thrsleep syz-fuzzer 49539 445340 62820 0 3 0x10008a sigsusp ksh 62820 376509 46116 0 3 0x9a kqread sshd 34405 422318 1 0 3 0x100083 ttyin getty 46116 57873 1 0 3 0x88 kqread sshd 2253 447429 10636 74 3 0x1100092 bpf pflogd 10636 480598 1 0 3 0x80 netio pflogd 99349 189290 94789 73 3 0x1100090 kqread syslogd 94789 235913 1 0 3 0x100082 netio syslogd 83137 5509 1 0 3 0x100080 kqread resolvd 30901 87970 42898 77 3 0x100092 kqread dhcpleased 99279 440370 42898 77 3 0x100092 kqread dhcpleased 42898 170980 1 0 3 0x80 kqread dhcpleased 10750 86658 0 0 3 0x14200 bored smr 81643 150742 0 0 2 0x14200 zerothread 41837 286004 0 0 3 0x14200 aiodoned aiodoned 74120 384264 0 0 3 0x14200 syncer update 88151 447195 0 0 3 0x14200 cleaner cleaner 25528 118824 0 0 3 0x14200 reaper reaper 49738 386063 0 0 3 0x14200 pgdaemon pagedaemon 40261 240823 0 0 3 0x14200 bored viomb 67319 362907 0 0 3 0x40014200 acpi0 acpi0 56106 223049 0 0 7 0x40014200 idle1 74883 520414 0 0 3 0x14200 bored softnet3 51692 234752 0 0 3 0x14200 bored softnet2 18623 126910 0 0 3 0x14200 bored softnet1 96956 279470 0 0 3 0x14200 bored softnet0 24086 9593 0 0 3 0x14200 bored systqmp 29887 209556 0 0 3 0x14200 bored systq 12655 203660 0 0 3 0x14200 tmoslp softclockmp 24064 309502 0 0 2 0x40014200 softclock 30173 242834 0 0 3 0x40014200 idle0 1 474906 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 64296 (syz-executor.3) thread 0xffff80002a21ad48 (479883) exclusive rrwlock inode r = 0 (0xfffffd8071e672c8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x42c sys/arch/amd64/amd64/trap.c:591 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d59fd8) #0 witness_lock+0x447 #1 syscall+0x412 mi_syscall sys/sys/syscall_mi.h:103 [inline] #1 syscall+0x412 sys/arch/amd64/amd64/trap.c:591 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 6474K 6930K 166960K 13196 0 pcb 15 16K 17K 166960K 140 0 rtable 219 6K 7K 166960K 563 0 pf 30 9K 10K 166960K 105 0 ifaddr 41 15K 16K 166960K 88 0 ifgroup 51 2K 2K 166960K 147 0 sysctl 3 0K 0K 166960K 5 0 counters 62 36K 36K 166960K 116 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 14K 166960K 106 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 90K 166960K 2404 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 153 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 97K 166960K 1699 0 sigio 0 0K 0K 166960K 10 0 proc 68 91K 115K 166960K 683 0 subproc 117 7K 8K 166960K 169 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 154 0 in_multi 88 6K 7K 166960K 150 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 533 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 330 123K 137K 166960K 19212 0 UVM aobj 25 2K 2K 166960K 25 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 11 0K 1K 166960K 60 0 temp 70 5931K 6001K 166960K 11421 0 kqueue 12 18K 26K 166960K 147 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 67 0 62 1 0 1 1 0 8 0 rtentry 112 191 0 90 4 0 4 4 0 8 0 unpcb 144 1093 0 1078 12 11 1 6 0 8 0 syncache 312 28 0 28 5 5 0 1 0 8 0 tcpqe 32 148 0 148 4 4 0 1 0 8 0 tcpcb 808 1394 0 1385 32 30 2 14 0 8 0 arp 120 41 0 24 1 0 1 1 0 8 0 inpcb 368 2316 0 2304 49 47 2 25 0 8 0 nd6 136 35 0 13 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 13 0 4 1 0 1 1 0 8 0 ppxss 1256 11 0 11 2 2 0 1 0 8 0 pffrag 232 3 0 2 1 0 1 1 0 482 0 pffrnode 88 3 0 2 1 0 1 1 0 8 0 pffrent 40 71 0 70 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 79 0 57 1 0 1 1 0 8 0 pfstkey 128 81 0 59 1 0 1 1 0 8 0 pfstate 376 81 0 59 6 3 3 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 620 0 207 30 1 29 29 0 8 0 art_table 32 621 0 207 4 0 4 4 0 8 0 art_node 16 190 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 29 0 20 1 0 1 1 0 8 0 semapl 112 151 0 141 1 0 1 1 0 8 0 shmpl 112 22 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3711 0 2258 92 0 92 92 0 8 0 ffsino 272 3711 0 2258 98 0 98 98 0 8 0 nchpl 144 6274 0 4618 63 0 63 63 0 8 0 uvmvnodes 80 4581 0 0 94 0 94 94 0 8 0 vnodes 216 4581 0 0 255 0 255 255 0 8 0 namei 1024 21155 0 21154 5 4 1 2 0 8 0 percpumem 16 72 0 27 1 0 1 1 0 8 0 vcpupl 2048 3 0 0 1 0 1 1 0 8 0 vmpool 696 3 0 0 1 0 1 1 0 8 0 kstatmem 264 76 0 54 2 0 2 2 0 8 0 scxspl 216 18599 0 18599 13 11 2 8 1 8 2 plimitpl 152 183 0 165 1 0 1 1 0 8 0 sigapl 424 2037 0 1971 10 1 9 9 0 8 0 futexpl 64 15296 0 15296 2 1 1 1 0 8 1 knotepl 120 418 0 0 11 0 11 11 0 8 0 kqueuepl 216 267 0 259 7 2 5 5 0 8 4 pipepl 320 297 0 266 10 6 4 6 0 8 1 fdescpl 496 1998 0 1971 6 1 5 5 0 8 0 filepl 152 12015 0 11758 43 29 14 22 0 8 2 lockfpl 104 538 0 536 2 1 1 2 0 8 0 lockfspl 48 233 0 231 1 0 1 1 0 8 0 sessionpl 144 29 0 11 1 0 1 1 0 8 0 pgrppl 48 43 0 25 1 0 1 1 0 8 0 ucredpl 104 1786 0 1773 1 0 1 1 0 8 0 zombiepl 144 1972 0 1971 3 2 1 1 0 8 0 processpl 1072 2037 0 1971 6 1 5 6 0 8 0 procpl 680 5013 0 4933 12 3 9 10 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 12 0 12 2 2 0 1 0 8 0 sockpl 488 3479 0 3447 116 110 6 37 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 240 0 0 30 2 28 30 0 8 0 mtagpl 96 261 0 0 7 0 7 7 0 8 0 mbufpl 256 1844 0 0 111 0 111 111 0 8 0 bufpl 288 6608 0 287 452 0 452 452 0 8 0 anonpl 24 364480 0 352352 171 71 100 139 0 186 0 amapchunkpl 152 60788 0 60008 46 5 41 43 0 158 0 amappl16 200 9838 0 9417 72 49 23 48 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 173 0 157 2 1 1 2 0 8 0 amappl13 176 35 0 34 1 0 1 1 0 8 0 amappl12 168 2796 0 2766 4 2 2 3 0 8 0 amappl11 160 74 0 60 1 0 1 1 0 8 0 amappl10 152 41 0 28 1 0 1 1 0 8 0 amappl9 144 186 0 184 1 0 1 1 0 8 0 amappl8 136 257 0 196 3 0 3 3 0 8 0 amappl7 128 191 0 162 2 0 2 2 0 8 0 amappl6 120 378 0 361 1 0 1 1 0 8 0 amappl5 112 152 0 141 1 0 1 1 0 8 0 amappl4 104 530 0 500 2 1 1 2 0 8 0 amappl3 96 12276 0 12199 6 3 3 4 0 8 0 amappl2 88 2519 0 2441 3 1 2 3 0 8 0 amappl1 80 15788 0 15191 23 9 14 23 0 8 0 amappl 88 18600 0 18389 7 0 7 7 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 24 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2001 0 1971 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2001 0 1971 1 0 1 1 0 8 0 vmmpekpl 168 20664 0 20590 4 0 4 4 0 8 0 vmmpepl 168 144536 0 142301 227 89 138 151 0 357 23 vmsppl 464 2000 0 1971 6 1 5 5 0 8 0 rwobjpl 56 47644 0 41463 93 5 88 88 0 8 0 pdppl 4096 4010 0 3945 239 166 73 86 0 8 8 pvpl 32 44133 0 0 356 0 356 356 0 265 0 pmappl 248 2000 0 1971 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1172 0 262 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8069081448,ffff80002d8f8698,ffff80002d8f86c8) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002d8f8668) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002d8f8668) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a21ad48,ffffff9c,7a71264fa010,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002d8f8820) at syscall+0x42c sys/arch/amd64/amd64/trap.c:591 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a71264fa000, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5