panic: amap_lookups: offset out of range
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
236685 50958 0 0 0 0 syz-executor.1
*245877 3598 0 0x2 0x4000000 1K syz-fuzzer
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
amap_lookups(fffffd806b18d0d0,6000,ffff800020b49380,8) at amap_lookups+0x2bd sys/uvm/uvm_amap.c:1047
uvm_fault(fffffd806e7bea18,c003119000,1,2) at uvm_fault+0x32a sys/uvm/uvm_fault.c:628
pageflttrap() at pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
usertrap(ffff800020b496a0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00356fd80, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
amap_lookups: offset out of range
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
amap_lookups(fffffd806b18d0d0,6000,ffff800020b49380,8) at amap_lookups+0x2bd sys/uvm/uvm_amap.c:1047
uvm_fault(fffffd806e7bea18,c003119000,1,2) at uvm_fault+0x32a sys/uvm/uvm_fault.c:628
pageflttrap() at pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
usertrap(ffff800020b496a0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xc00356fd80, count: -7
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff800020b49230
rbx 0xffff800020b492e0
rdx 0xffff800020ab0ee8
rcx 0
rax 0
r8 0xffffffff81e10fcf kprintf+0x16f
r9 0x1
r10 0x25
r11 0x3954a46a19b685f2
r12 0x3000000008
r13 0xffff800020b49240
r14 0x100
r15 0x1
rip 0xffffffff818ea768 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b49220
ss 0
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-fuzzer) pid=245877 stat=onproc
flags process=2<EXEC> proc=4000000<THREAD>
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020ab1650,0xffff800020ab02a0
process=0xffff800020a8aa90 user=0xffff800020b44000, vmspace=0xfffffd806e7bea18
estcpu=0, cpticks=0, pctcpu=0.47
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
50958 236685 28734 0 7 0 syz-executor.1
50958 429025 28734 0 3 0x4000000 biowait syz-executor.1
28734 406809 3598 0 3 0x82 nanosleep syz-executor.1
85543 280894 1 0 3 0x100083 ttyin getty
90387 131659 0 0 3 0x14200 acct acct
71344 125669 0 0 3 0x14200 bored sosplice
5279 411440 3598 0 3 0x2 biowait syz-executor.0
3598 432433 95315 0 3 0x82 thrsleep syz-fuzzer
3598 194873 95315 0 3 0x4000082 nanosleep syz-fuzzer
3598 80626 95315 0 3 0x4000082 thrsleep syz-fuzzer
3598 452834 95315 0 3 0x4000082 thrsleep syz-fuzzer
3598 238696 95315 0 3 0x4000082 thrsleep syz-fuzzer
3598 95545 95315 0 3 0x4000082 thrsleep syz-fuzzer
3598 431664 95315 0 3 0x4000082 nanosleep syz-fuzzer
3598 267557 95315 0 3 0x4000082 thrsleep syz-fuzzer
* 3598 245877 95315 0 7 0x4000002 syz-fuzzer
3598 123502 95315 0 3 0x4000082 thrsleep syz-fuzzer
95315 481409 30011 0 3 0x10008a pause ksh
30011 270994 18318 0 3 0x92 select sshd
18318 207977 1 0 3 0x80 select sshd
2588 286155 57977 74 3 0x100092 bpf pflogd
57977 376039 1 0 3 0x80 netio pflogd
13648 109368 24702 73 3 0x100090 kqread syslogd
24702 3165 1 0 3 0x100082 netio syslogd
2914 385795 1 77 3 0x100090 poll dhclient
19393 387225 1 0 3 0x80 poll dhclient
64663 445102 0 0 2 0x14200 zerothread
22632 242769 0 0 3 0x14200 aiodoned aiodoned
39653 135730 0 0 3 0x14200 syncer update
6250 160135 0 0 3 0x14200 cleaner cleaner
41052 444806 0 0 3 0x14200 reaper reaper
77968 82358 0 0 3 0x14200 pgdaemon pagedaemon
96347 164988 0 0 3 0x14200 bored crynlk
59697 107869 0 0 3 0x14200 bored crypto
9836 413288 0 0 3 0x40014200 acpi0 acpi0
53665 297781 0 0 3 0x40014200 idle1
69955 110742 0 0 3 0x14200 bored softnet
62474 392700 0 0 3 0x14200 bored systqmp
66059 469219 0 0 3 0x14200 bored systq
14498 229097 0 0 3 0x40014200 bored softclock
93598 426385 0 0 3 0x40014200 idle0
59998 126066 0 0 3 0x14200 bored smr
1 109323 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 50958 (syz-executor.1) thread 0xffff800020ab0508 (429025)
exclusive rrwlock inode r = 0 (0xfffffd80628d6c50)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 ufs_rename+0x1bb sys/ufs/ufs/ufs_vnops.c:806
#6 VOP_RENAME+0x106 sys/kern/vfs_vops.c:427
#7 dorenameat+0x2a3 sys/kern/vfs_syscalls.c:2904
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80628d6a30)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dorenameat+0x106 sys/kern/vfs_syscalls.c:2874
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 5279 (syz-executor.0) thread 0xffff800020ab0018 (411440)
exclusive rrwlock inode r = 0 (0xfffffd80628d6b40)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352
#5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80691c6808)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x447 sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#9 Xsyscall+0x128
Process 3598 (syz-fuzzer) thread 0xffff800020ab0ee8 (245877)
shared rwlock vmmaplk r = 0 (0xfffffd806e7bea30)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448
#2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524
#3 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199
#4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#5 recall_trap+0x8
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8265d2c0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 pageflttrap+0x6f sys/arch/amd64/amd64/trap.c:162
#2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369
#3 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9505 6535K 6983K 78643K 10874 0 0
pcb 13 8K 8K 78643K 31 0 0
rtable 109 4K 4K 78643K 264 0 0
ifaddr 59 12K 12K 78643K 74 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 4K 78643K 1474 0 0
iov 0 0K 16K 78643K 27 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1220 77K 77K 78643K 1330 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 3 0 0
VM map 2 1K 1K 78643K 4 0 0
sem 12 0K 0K 78643K 55 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1809 196K 290K 78643K 12766 0 0
file desc 5 13K 25K 78643K 147 0 0
sigio 0 0K 0K 78643K 4 0 0
proc 60 63K 95K 78643K 504 0 0
subproc 32 2K 2K 78643K 51 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 70 0 0
in_multi 40 2K 2K 78643K 51 0 0
ether_multi 1 0K 0K 78643K 1 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 42 185K 185K 78643K 42 0 0
exec 0 0K 1K 78643K 231 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 115 22K 23K 78643K 1436 0 0
UVM aobj 10 2K 2K 78643K 10 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 22 0 0
NDP 9 0K 0K 78643K 17 0 0
temp 102 3549K 3619K 78643K 15433 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 2 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 37 0 35 1 0 1 1 0 8 0
rtentry 112 55 0 11 2 0 2 2 0 8 0
unpcb 120 92 0 82 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 110 0 110 1 1 0 1 0 8 0
tcpcb 544 113 0 109 2 0 2 2 0 8 1
inpcb 280 312 0 305 3 1 2 3 0 8 1
nd6 48 6 0 2 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 0 1 1 0 8 1
pffrag 232 3 0 3 1 1 0 1 0 482 0
pffrnode 88 3 0 3 1 1 0 1 0 8 0
pffrent 40 92 0 92 1 1 0 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 19 0 2 1 0 1 1 0 8 0
pfstkey 112 19 0 2 1 0 1 1 0 8 0
pfstate 328 19 0 2 2 0 2 2 0 8 0
pfrule 1360 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 256 256 0 43 14 0 14 14 0 8 0
art_table 32 257 0 43 2 0 2 2 0 8 0
art_node 16 54 0 14 1 0 1 1 0 8 0
sysvmsgpl 40 29 0 22 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 53 0 43 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 1586 0 175 46 0 46 46 0 8 0
ffsino 272 1586 0 175 95 0 95 95 0 8 0
nchpl 144 2003 0 401 61 0 61 61 0 8 1
uvmvnodes 72 1709 0 0 32 0 32 32 0 8 0
vnodes 208 1709 0 0 90 0 90 90 0 8 0
namei 1024 5455 0 5452 1 0 1 1 0 8 0
percpumem 16 30 0 0 1 0 1 1 0 8 0
vmpool 552 2 0 2 1 0 1 1 0 8 1
scxspl 192 5448 0 5446 8 2 6 7 0 8 5
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 432 343 0 328 3 1 2 3 0 8 0
futexpl 56 2593 0 2593 1 0 1 1 0 8 1
knotepl 112 88 0 69 2 0 2 2 0 8 1
kqueuepl 104 39 0 37 1 0 1 1 0 8 0
pipepl 160 276 0 257 2 0 2 2 0 8 1
fdescpl 488 344 0 328 3 0 3 3 0 8 0
filepl 152 2282 0 2181 7 1 6 7 0 8 2
lockfpl 104 27 0 26 1 0 1 1 0 8 0
lockfspl 48 12 0 11 1 0 1 1 0 8 0
sessionpl 112 20 0 9 1 0 1 1 0 8 0
pgrppl 48 20 0 9 1 0 1 1 0 8 0
ucredpl 96 218 0 209 1 0 1 1 0 8 0
zombiepl 144 328 0 328 1 0 1 1 0 8 1
processpl 896 361 0 328 4 0 4 4 0 8 0
procpl 632 608 0 565 5 0 5 5 0 8 1
srpgc 64 2 0 2 1 0 1 1 0 8 1
sosppl 128 3 0 3 1 0 1 1 0 8 1
sockpl 384 441 0 422 5 1 4 5 0 8 2
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 11 0 0 2 0 2 2 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 157 0 0 19 0 19 19 0 8 0
mtagpl 80 11 0 0 1 0 1 1 0 8 0
mbufpl 256 254 0 0 15 0 15 15 0 8 0
bufpl 256 6426 0 1309 320 0 320 320 0 8 0
anonpl 16 59761 0 43521 91 3 88 90 0 124 8
amapchunkpl 152 2382 0 2241 12 0 12 12 0 158 5
amappl16 192 1913 0 844 62 5 57 62 0 8 3
amappl15 184 57 0 55 1 0 1 1 0 8 0
amappl14 176 66 0 60 1 0 1 1 0 8 0
amappl12 160 4 0 2 2 1 1 1 0 8 0
amappl11 152 57 0 42 1 0 1 1 0 8 0
amappl10 144 15 0 8 1 0 1 1 0 8 0
amappl9 136 626 0 621 1 0 1 1 0 8 0
amappl8 128 203 0 169 2 0 2 2 0 8 0
amappl7 120 52 0 46 1 0 1 1 0 8 0
amappl6 112 65 0 58 1 0 1 1 0 8 0
amappl5 104 139 0 124 1 0 1 1 0 8 0
amappl4 96 605 0 572 1 0 1 1 0 8 0
amappl3 88 116 0 110 1 0 1 1 0 8 0
amappl2 80 1826 0 1754 3 1 2 3 0 8 0
amappl1 72 17641 0 17200 26 16 10 20 0 8 0
amappl 80 887 0 840 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 64 9 0 0 1 0 1 1 0 8 0
uaddrrnd 24 346 0 328 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 346 0 328 1 0 1 1 0 8 0
vmmpekpl 168 7015 0 6981 2 0 2 2 0 8 0
vmmpepl 168 50695 0 48473 153 13 140 140 0 357 41
vmsppl 368 343 0 328 2 0 2 2 0 8 0
pdppl 4096 699 0 660 6 0 6 6 0 8 1
pvpl 32 176930 0 157460 211 2 209 211 0 265 21
pmappl 232 345 0 330 2 0 2 2 0 8 1
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 487 0 3 14 0 14 14 0 8 0