https://bz.apache.org/bugzilla/show_bug.cgi?id=66639
Bug ID: 66639
Summary: SEGV on strlen-avx2.S:65
Product: Apache httpd-2
Version: 2.4.54
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_auth_dbm
Assignee: bugs@httpd.apache.org
Reporter: sihan2...@iscas.ac.cn
Target Milestone: ---
Hello, Httpd developers! We recently ran some fuzz testing on htdbm 2.4.54 and
encountered a SEGV bug.
## Command To Reproduce the bug:
./htdbm -llniiidvt
## Environment
- OS: Ubuntu 20.04
- gcc 9.4.0
- htdbm 2.4.54
## ASAN Report
=================================================================
==958289==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x7f974616d6e5 bp 0x7ffd235521b0 sp 0x7ffd23551968 T0)
==958289==The signal is caused by a READ memory access.
==958289==Hint: address points to the zero page.
#0 0x7f974616d6e5
/build/glibc-SzIz7B/glibc-2.31/string/../sysdeps/x86_64/multiarch/strlen-avx2.S:65
#1 0x4314f8 in strlen
(/home/root/sp/Dataset/Httpd/httpd_aflpp/install/bin/htdbm+0x4314f8)
#2 0x4cea93 in htdbm_verify
/home/root/sp/Dataset/Httpd/httpd_aflpp/support/htdbm.c:197:17
#3 0x4cd385 in main
/home/root/sp/Dataset/Httpd/httpd_aflpp/support/htdbm.c:422:23
#4 0x7f9746009082 in __libc_start_main
/build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
#5 0x41d58d in _start
(/home/root/sp/Dataset/Httpd/httpd_aflpp/install/bin/htdbm+0x41d58d)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/build/glibc-SzIz7B/glibc-2.31/string/../sysdeps/x86_64/multiarch/strlen-avx2.S:65
==958289==ABORTING
Many Thanks.
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