uvm_fault(0xffffffff82e18cb0, 0xffff8000248a2004, 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 *459856 23661 0 0x8000000 0x4000000 0K syz-executor.5 208264 99764 0 0x8000000 0x4000000 1 syz-executor.3 ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8066ac0390,ffff80002a2a0af8,ffff80002a2a0b28) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a2a0ac8) at vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 namei(ffff80002a2a0ac8) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff80002a2a0ac8,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff8000ffff4040,ffffff9c,20000200,200,0,ffff80002a2a0c70) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff80002a2a0d20) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a2a0d20) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8b9a18435a0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82e18cb0, 0xffff8000248a2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8066ac0390,ffff80002a2a0af8,ffff80002a2a0b28) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a2a0ac8) at vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 namei(ffff80002a2a0ac8) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff80002a2a0ac8,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff8000ffff4040,ffffff9c,20000200,200,0,ffff80002a2a0c70) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff80002a2a0d20) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a2a0d20) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8b9a18435a0, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2a0740 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8067579140 r8 0xffffffffffffffff r9 0xfffffd807f7d3618 r10 0xabc513d616d34d7d r11 0x4893c768e9764281 r12 0 r13 0xfffffd806687e340 r14 0 r15 0xffff8000248a2000 rip 0xffffffff827120eb ufs_lookup+0x49b cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a2a0630 ss 0x10 ufs_lookup+0x49b: movzwl 0x4(%r15,%rbx,1),%r14d ddb{0}> show proc PROC (syz-executor.5) tid=459856 pid=23661 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=80, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffff4560,0xffffffff82e19cd8 process=0xffff8000ffff0900 user=0xffff80002a29b000, vmspace=0xfffffd80670e91c8 estcpu=30, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23661 391275 6335 0 2 0x8000000 syz-executor.5 *23661 459856 6335 0 7 0xc000000 syz-executor.5 99764 306799 35489 0 2 0x8000000 syz-executor.3 99764 208264 35489 0 7 0xc000000 syz-executor.3 22277 391113 32162 0 2 0x8000482 syz-executor.0 67582 340621 32162 0 2 0x8000002 syz-executor.7 6335 315975 32162 0 3 0x8000082 nanoslp syz-executor.5 13675 212310 32162 0 2 0x8000002 syz-executor.4 29355 483069 32162 0 3 0x8000082 nanoslp syz-executor.2 35489 176277 32162 0 3 0x8000082 nanoslp syz-executor.3 32162 444954 81284 0 3 0x1a000082 wait syz-execprog 32162 457275 81284 0 3 0x1e000082 nanoslp syz-execprog 32162 144349 81284 0 3 0x1e000082 wait syz-execprog 32162 67626 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 348957 81284 0 3 0x1e000082 wait syz-execprog 32162 330364 81284 0 3 0x1e000082 wait syz-execprog 32162 261860 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 1984 81284 0 3 0x1e000082 wait syz-execprog 32162 435812 81284 0 3 0x1e000082 wait syz-execprog 32162 204203 81284 0 3 0x1e000082 wait syz-execprog 32162 332474 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 29028 81284 0 3 0x1e000082 wait syz-execprog 32162 517777 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 134373 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 454762 81284 0 3 0x1e000082 thrsleep syz-execprog 32162 23507 81284 0 3 0x1e000082 kqread syz-execprog 81284 381284 7303 0 3 0x810008a sigsusp ksh 7303 202268 60330 0 3 0x1800009a kqread sshd 55607 371546 1 0 3 0x18100083 ttyin getty 60330 267441 1 0 3 0x18000088 kqread sshd 56122 451201 86256 74 3 0x19100092 bpf pflogd 86256 151164 1 0 3 0x18000080 sbwait pflogd 74690 210939 81195 73 3 0x19100090 kqread syslogd 81195 78738 1 0 3 0x18100082 sbwait syslogd 26507 24865 1 0 3 0x18100080 kqread resolvd 94518 9032 52476 77 3 0x18100092 kqread dhcpleased 54416 468562 52476 77 3 0x18100092 kqread dhcpleased 52476 300454 1 0 3 0x18000080 kqread dhcpleased 86021 63787 0 0 3 0x14200 bored smr 8663 65536 0 0 2 0x14200 zerothread 73699 31870 0 0 3 0x14200 aiodoned aiodoned 13329 200356 0 0 3 0x14200 syncer update 92539 216510 0 0 3 0x14200 cleaner cleaner 37602 275767 0 0 3 0x14200 reaper reaper 29213 97480 0 0 3 0x14200 pgdaemon pagedaemon 16106 7901 0 0 3 0x14200 bored viomb 21447 86942 0 0 3 0x40014200 acpi0 acpi0 66943 81289 0 0 3 0x40014200 idle1 71636 208723 0 0 3 0x14200 bored softnet3 4203 358727 0 0 3 0x14200 bored softnet2 85538 476934 0 0 3 0x14200 bored softnet1 34571 274419 0 0 3 0x14200 bored softnet0 82037 460970 0 0 3 0x14200 bored systqmp 14923 51083 0 0 3 0x14200 bored systq 95898 364466 0 0 3 0x14200 tmoslp softclockmp 22880 52033 0 0 3 0x40014200 tmoslp softclock 83982 474042 0 0 3 0x40014200 idle0 1 193618 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 23661 (syz-executor.5) thread 0xffff8000ffff4040 (459856) exclusive rrwlock inode r = 0 (0xfffffd806687e3d8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 #6 namei+0x56a sys/kern/vfs_lookup.c:250 #7 vn_open+0x180 sys/kern/vfs_vnops.c:107 #8 doopenat+0x269 sys/kern/vfs_syscalls.c:1126 #9 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #9 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82e38af0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 syscall+0x83b mi_syscall sys/sys/syscall_mi.h:180 [inline] #1 syscall+0x83b sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 13675 (syz-executor.4) thread 0xffff80002a20a038 (212310) exclusive rrwlock inode r = 0 (0xfffffd806687e928) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vget+0x1fd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x1373 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 #11 namei+0x56a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1855 #13 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #13 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e6022c0) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 #6 namei+0x56a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1855 #8 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #8 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10174 6474K 6474K 166960K 11255 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 378 0 pf 32 9K 10K 166960K 46 0 ifaddr 45 15K 15K 166960K 51 0 ifgroup 55 2K 2K 166960K 60 0 counters 64 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1484 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1274 80K 80K 166960K 1294 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 12 41K 89K 166960K 3339 0 proc 67 91K 115K 166960K 554 0 subproc 0 0K 0K 166960K 13 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 421 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 75K 76K 166960K 30605 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 36 72K 108K 166960K 4682 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 31 0 temp 2 6804K 6868K 166960K 42138 0 kqueue 12 18K 18K 166960K 34 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 35 0 32 1 0 1 1 0 8 0 rtentry 112 122 0 12 4 0 4 4 0 8 0 unpcb 144 47 0 32 1 0 1 1 0 8 0 syncache 336 8 0 8 2 2 0 1 0 8 0 tcpqe 32 34 0 34 1 1 0 1 0 8 0 tcpcb 808 12 0 9 1 0 1 1 0 8 0 arp 120 20 0 2 1 0 1 1 0 8 0 inpcb 392 73 0 67 1 0 1 1 0 8 0 nd6 136 27 0 3 2 1 1 1 0 8 0 kcovpl 48 1 0 1 1 1 0 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 33 0 15 1 0 1 1 0 8 0 pfstkey 128 33 0 15 1 0 1 1 0 8 0 pfstate 376 33 0 15 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 501 0 48 32 3 29 29 0 8 0 art_table 32 502 0 48 5 1 4 4 0 8 0 art_node 16 121 0 21 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7970 0 5135 178 0 178 178 0 8 0 ffsino 272 7970 0 5135 190 0 190 190 0 8 0 nchpl 144 14636 0 12851 67 0 67 67 0 8 0 uvmvnodes 80 6212 0 0 127 0 127 127 0 8 0 vnodes 216 6212 0 0 346 0 346 346 0 8 0 namei 1024 36321 0 36320 4 3 1 2 0 8 0 percpumem 16 47 0 1 1 0 1 1 0 8 0 kstatmem 264 26 0 2 2 0 2 2 0 8 0 scxspl 216 38821 0 38821 10 9 1 8 1 8 1 plimitpl 152 50 0 34 1 0 1 1 0 8 0 sigapl 424 3684 0 3639 10 4 6 7 0 8 0 futexpl 64 12297 0 12297 2 1 1 1 0 8 1 knotepl 120 118 0 0 4 0 4 4 0 8 0 kqueuepl 216 30 0 22 1 0 1 1 0 8 0 pipepl 320 186 0 160 5 2 3 3 0 8 0 fdescpl 496 3666 0 3641 6 2 4 5 0 8 0 filepl 152 11732 0 11602 7 1 6 6 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 33 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 99 0 86 1 0 1 1 0 8 0 zombiepl 144 3643 0 3639 2 1 1 1 0 8 0 processpl 1136 3684 0 3639 5 1 4 4 0 8 0 procpl 656 6932 0 6870 10 3 7 7 0 8 1 sockpl 664 155 0 131 4 1 3 3 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 425 0 0 51 0 51 51 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 465 0 0 28 0 28 28 0 8 0 bufpl 280 11496 0 5241 447 0 447 447 0 8 0 anonpl 24 521450 0 516259 68 32 36 54 0 186 3 amapchunkpl 152 98656 0 98083 44 16 28 29 0 158 3 amappl16 200 13414 0 13323 10 4 6 6 0 8 1 amappl15 192 72 0 72 2 2 0 1 0 8 0 amappl14 184 283 0 268 3 2 1 2 0 8 0 amappl13 176 82 0 82 2 2 0 1 0 8 0 amappl12 168 4398 0 4369 4 2 2 2 0 8 0 amappl11 160 65 0 51 1 0 1 1 0 8 0 amappl10 152 90 0 82 2 1 1 1 0 8 0 amappl9 144 563 0 563 3 3 0 1 0 8 0 amappl8 136 199 0 162 2 0 2 2 0 8 0 amappl7 128 96 0 87 1 0 1 1 0 8 0 amappl6 120 444 0 427 3 1 2 2 0 8 0 amappl5 112 230 0 215 1 0 1 1 0 8 0 amappl4 104 722 0 688 3 1 2 2 0 8 0 amappl3 96 19546 0 19481 4 1 3 3 0 8 1 amappl2 88 4233 0 4161 6 4 2 4 0 8 0 amappl1 80 24370 0 23834 33 21 12 23 0 8 0 amappl 88 29853 0 29692 8 3 5 5 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3666 0 3641 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3666 0 3641 1 0 1 1 0 8 0 vmmpekpl 168 28587 0 28554 2 0 2 2 0 8 0 vmmpepl 168 201323 0 199673 133 33 100 120 0 357 20 vmsppl 440 3665 0 3641 8 4 4 5 0 8 0 rwobjpl 56 66839 0 59571 117 14 103 103 0 8 0 pdppl 4096 7339 0 7282 133 64 69 81 0 8 12 pvpl 32 46813 0 0 379 1 378 378 0 265 0 pmappl 248 3665 0 3641 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 628 0 74 16 0 16 16 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x49b sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8066ac0390,ffff80002a2a0af8,ffff80002a2a0b28) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a2a0ac8) at vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566 namei(ffff80002a2a0ac8) at namei+0x56a sys/kern/vfs_lookup.c:250 vn_open(ffff80002a2a0ac8,201,0) at vn_open+0x180 sys/kern/vfs_vnops.c:107 doopenat(ffff8000ffff4040,ffffff9c,20000200,200,0,ffff80002a2a0c70) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126 syscall(ffff80002a2a0d20) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a2a0d20) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8b9a18435a0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) 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 __mp_lock(ffffffff82e388e8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e388e8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002a38cb60) at syscall+0x7ab mi_syscall_return sys/sys/syscall_mi.h:208 [inline] syscall(ffff80002a38cb60) at syscall+0x7ab sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f61704f880, count: 9 ddb{1}> trace x86_ipi_db(ffff800029cebff0) 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 __mp_lock(ffffffff82e388e8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e388e8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002a38cb60) at syscall+0x7ab mi_syscall_return sys/sys/syscall_mi.h:208 [inline] syscall(ffff80002a38cb60) at syscall+0x7ab sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f61704f880, count: -6