uvm_fault(0xffffffff83676930, 0xffff8000297c2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND *151466 92106 0 0x2 0 0K syz-executor ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd800ba707f0,ffff80003c62c040,ffff80003c62c070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c62c010) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c62c010) at namei+0x7aa sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a43e7b8,ffffff9c,7de548ecfec0,1ff) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 syscall(ffff80003c62c1f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c62c1f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7de548ecff60, 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(0xffffffff83676930, 0xffff8000297c2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd800ba707f0,ffff80003c62c040,ffff80003c62c070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c62c010) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c62c010) at namei+0x7aa sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a43e7b8,ffffff9c,7de548ecfec0,1ff) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 syscall(ffff80003c62c1f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c62c1f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7de548ecff60, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c62bdb0 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd805e8e8018 r8 0xffffffffffffffff r9 0xfffffd807f7d35b0 r10 0x5c0b8eab9f4883b3 r11 0xfc80bc9927e020b3 r12 0 r13 0xfffffd8060242690 r14 0 r15 0xffff8000297c2000 rip 0xffffffff82572441 ufs_lookup+0x5e1 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c62bca0 ss 0x10 ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d ddb{0}> show proc PROC (syz-executor) tid=151466 pid=92106 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a43f970,0xffff80003c5d9c20 process=0xffff80002a52a248 user=0xffff80003c627000, vmspace=0xfffffd806bfda3a8 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *92106 151466 2990 0 7 0x2 syz-executor 37606 299423 5724 0 2 0x480 syz-executor 37606 329395 5724 0 3 0x4000080 kqsel syz-executor 37606 387676 5724 0 3 0x4000080 fsleep syz-executor 20155 409259 42227 0 3 0x80 nanoslp syz-executor 20155 335123 42227 0 3 0x4000080 ttyin syz-executor 20155 233685 42227 0 3 0x4000080 sbwait syz-executor 20155 391757 42227 0 3 0x4000080 fsleep syz-executor 6006 252085 1 0 3 0x100083 ttyin getty 74 487381 35540 0 3 0x82 sbwait sshd-session 82081 485835 0 0 3 0x14200 acct acct 87464 380717 35540 0 3 0x82 sbwait sshd-session 5724 213121 2990 0 2 0x482 syz-executor 14715 405637 0 0 3 0x14200 bored sosplice 42227 145299 2990 0 2 0x482 syz-executor 12151 184019 2990 0 2 0x482 syz-executor 2990 122205 43656 0 3 0x82 nanoslp syz-executor 43656 27789 79827 0 3 0x10008a sigsusp ksh 79827 469392 21957 0 3 0x98 kqread sshd-session 21957 523384 35540 0 3 0x92 kqread sshd-session 35540 245421 1 0 3 0x88 kqread sshd 31806 319976 26096 74 3 0x1100092 bpf pflogd 26096 427387 1 0 3 0x80 sbwait pflogd 50499 75417 79108 73 3 0x1100090 kqread syslogd 79108 91844 1 0 3 0x100082 sbwait syslogd 64480 464814 1 0 3 0x100080 kqread resolvd 59726 225402 72974 77 3 0x100092 kqread dhcpleased 22195 260328 72974 77 3 0x100092 kqread dhcpleased 72974 391416 1 0 3 0x80 kqread dhcpleased 69306 30404 0 0 3 0x14200 bored smr 3707 210309 0 0 2 0x14200 zerothread 94108 50894 0 0 3 0x14200 aiodoned aiodoned 83526 459356 0 0 3 0x14200 syncer update 84908 388905 0 0 3 0x14200 cleaner cleaner 52333 429221 0 0 3 0x14200 reaper reaper 12874 368260 0 0 3 0x14200 pgdaemon pagedaemon 42097 387427 0 0 3 0x14200 bored viomb 56028 123738 0 0 3 0x40014200 acpi0 acpi0 76055 278251 0 0 7 0x40014200 idle1 4711 100336 0 0 3 0x14200 bored softnet3 32462 162137 0 0 3 0x14200 bored softnet2 77712 430490 0 0 3 0x14200 bored softnet1 24628 112863 0 0 3 0x14200 bored softnet0 57656 157602 0 0 3 0x14200 bored systqmp 44797 32692 0 0 3 0x14200 bored systq 43356 440990 0 0 3 0x14200 tmoslp softclockmp 52463 177065 0 0 2 0x40014200 softclock 22225 425948 0 0 3 0x40014200 idle0 1 395507 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 92106 (syz-executor) thread 0xffff80002a43e7b8 (151466) exclusive rrwlock inode r = 0 (0xfffffd8060242730) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835eaf78) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 11040K 12434K 166960K 13405 0 pcb 17 16K 17K 166960K 346 0 rtable 144 6K 7K 166960K 631 0 pf 34 17K 19K 166960K 247 0 ifaddr 30 4K 7K 166960K 92 0 ifgroup 51 2K 2K 166960K 117 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 36K 166960K 108 0 ioctlops 0 0K 4K 166960K 1696 0 iov 1 0K 16K 166960K 196 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1453 91K 92K 166960K 2851 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 75 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 10 33K 89K 166960K 1481 0 sigio 0 0K 0K 166960K 168 0 proc 76 103K 140K 166960K 822 0 subproc 45 2K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 173 0 in_multi 54 3K 7K 166960K 191 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 776 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 198 49K 89K 166960K 14853 0 UVM aobj 131 4K 4K 166960K 132 0 pinsyscall 39 78K 103K 166960K 2757 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 81 0 NDP 13 0K 2K 166960K 62 0 temp 64 6899K 7151K 166960K 78543 0 kqueue 13 20K 32K 166960K 238 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 120 212 0 209 4 3 1 3 0 8 0 rtentry 112 203 0 144 4 1 3 4 0 8 0 unpcb 144 1063 0 1045 10 6 4 6 0 8 3 syncache 336 9 0 9 4 3 1 1 0 8 1 tcpqe 32 4 0 4 3 2 1 1 0 8 1 tcpcb 808 538 0 526 11 9 2 8 0 8 0 arp 120 36 0 26 1 0 1 1 0 8 0 inpcb 376 1833 0 1818 9 3 6 9 0 8 4 nd6 136 45 0 31 1 0 1 1 0 8 0 pkpcb 40 9 0 9 1 0 1 1 0 8 1 kcovpl 48 13 0 8 1 0 1 1 0 8 0 ppxss 1168 13 0 13 3 2 1 1 0 8 1 pppxif 1472 1 0 1 1 1 0 1 0 8 0 pffrag 232 11 0 4 1 0 1 1 0 482 0 pffrnode 88 11 0 4 1 0 1 1 0 8 0 pffrent 40 22 0 15 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 24 109 0 39 1 0 1 1 0 8 0 pfstkey 128 115 0 45 3 0 3 3 0 8 0 pfstate 376 110 0 41 8 0 8 8 0 8 0 pfrule 1344 93 0 88 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 839 0 569 32 12 20 30 0 8 1 art_table 32 840 0 569 4 0 4 4 0 8 0 art_node 16 198 0 148 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 129 0 1 4 0 4 4 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4209 0 2697 95 0 95 95 0 8 0 ffsino 280 4222 0 2710 109 0 109 109 0 8 0 nchpl 144 6223 0 4521 64 0 64 64 0 8 0 uvmvnodes 80 5152 0 0 106 0 106 106 0 8 0 vnodes 216 5152 0 0 287 0 287 287 0 8 0 namei 1024 24179 0 24178 2 1 1 2 0 8 0 percpumem 16 68 0 23 1 0 1 1 0 8 0 kstatmem 264 66 0 44 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 18496 0 18496 10 9 1 8 1 8 1 plimitpl 152 366 0 349 1 0 1 1 0 8 0 sigapl 424 1801 0 1753 10 1 9 9 0 8 2 futexpl 64 21561 0 21559 1 0 1 1 0 8 0 knotepl 120 569 0 0 17 0 17 17 0 8 0 kqueuepl 216 419 0 409 3 2 1 3 0 8 0 pipepl 328 528 0 498 19 11 8 9 0 8 4 fdescpl 504 1758 0 1732 5 0 5 5 0 8 0 filepl 152 13353 0 13169 26 9 17 18 0 8 7 lockfpl 104 766 0 764 2 1 1 2 0 8 0 lockfspl 48 283 0 281 1 0 1 1 0 8 0 sessionpl 144 34 0 23 1 0 1 1 0 8 0 pgrppl 48 148 0 130 1 0 1 1 0 8 0 ucredpl 104 2619 0 2606 1 0 1 1 0 8 0 zombiepl 144 1757 0 1753 1 0 1 1 0 8 0 processpl 1168 1801 0 1753 7 1 6 6 0 8 1 procpl 648 3685 0 3632 8 0 8 8 0 8 0 srpgc 96 15 0 15 3 2 1 1 0 8 1 sosppl 168 9 0 8 3 2 1 1 0 8 0 sockpl 688 3133 0 3097 26 14 12 22 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 1204 0 0 75 0 75 75 0 8 0 bufpl 280 6438 0 272 441 0 441 441 0 8 0 anonpl 24 253758 0 244763 94 11 83 83 0 185 17 amapchunkpl 152 49179 0 48695 47 16 31 36 0 158 3 amappl16 200 5686 0 5428 39 11 28 28 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 133 0 119 1 0 1 1 0 8 0 amappl13 176 13 0 12 1 0 1 1 0 8 0 amappl12 168 2495 0 2469 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 133 0 118 1 0 1 1 0 8 0 amappl6 120 228 0 222 1 0 1 1 0 8 0 amappl5 112 144 0 134 1 0 1 1 0 8 0 amappl4 104 357 0 338 1 0 1 1 0 8 0 amappl3 96 9813 0 9729 4 0 4 4 0 8 0 amappl2 88 774 0 699 2 0 2 2 0 8 0 amappl1 80 13683 0 12956 20 2 18 18 0 8 0 amappl 88 14295 0 14160 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 131 0 1 3 0 3 3 0 8 0 uaddrrnd 24 1758 0 1732 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1758 0 1732 1 0 1 1 0 8 0 vmmpekpl 168 15261 0 15194 4 0 4 4 0 8 0 vmmpepl 168 118336 0 116261 126 4 122 122 0 357 9 vmsppl 456 1757 0 1732 5 0 5 5 0 8 0 rwobjpl 64 36573 0 29995 108 0 108 108 0 8 0 pdppl 4096 3523 0 3464 113 38 75 83 0 8 16 pvpl 32 22343 0 0 181 1 180 180 0 265 0 pmappl 248 1757 0 1732 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 376 0 69 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd800ba707f0,ffff80003c62c040,ffff80003c62c070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c62c010) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c62c010) at namei+0x7aa sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a43e7b8,ffffff9c,7de548ecfec0,1ff) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 syscall(ffff80003c62c1f0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c62c1f0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7de548ecff60, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b5bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b5bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029b5bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b5bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5