From: "Hanno Böck" <hanno@hboeck.de>
To: kbd@lists.altlinux.org
Subject: [kbd] Invalid out of bounds memory read when running make check
Date: Mon, 21 Mar 2016 10:41:52 +0100 [thread overview]
Message-ID: <20160321104152.654b0d38@pc1> (raw)
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Hi,
When compiling kbd (latest version 2.0.3) with address sanitizer and
running the test suite (make check) it will show a global out of bounds
memory read. I have attached the address sanitizer error message at the
end of this mail.
I have not fully tracked down the bug, but the error happens in the
file ksyms.c in line 203.
The test that's causing this can be manually run with
./libkeymap-dumpkeys ./dumpkeys.ua-ws.map SEPARATE_LINE FALSE
in the tests dir.
This line from dumpkeys.ua-ws.map causes it:
altgr keycode 3 = 157
To reproduce:
./configure CFLAGS="-fsanitize=address -g" LDFLAGS="-fsanitize=address"
make
make check
Here's the full asan error:
==19183==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0000006473d8 at pc 0x417ce5 bp 0x7ffc88302d70 sp 0x7ffc88302d60
READ of size 8 at 0x0000006473d8 thread T0
#0 0x417ce4 in codetoksym /mnt/ram/kbd/src/libkeymap/ksyms.c:203
#1 0x418e82 in convert_code /mnt/ram/kbd/src/libkeymap/ksyms.c:415
#2 0x40bc3f in yyparse /mnt/ram/kbd/src/libkeymap/parser.y:396
#3 0x40ce98 in lk_parse_keymap /mnt/ram/kbd/src/libkeymap/parser.y:421
#4 0x402167 in main /mnt/ram/kbd/tests/libkeymap-dumpkeys.c:32
#5 0x7f9a0f87b62f in __libc_start_main (/lib64/libc.so.6+0x2062f)
#6 0x401db8 in _start (/mnt/ram/kbd/tests/libkeymap-dumpkeys+0x401db8)
0x0000006473d8 is located 24 bytes to the right of global variable 'koi8_syms' from 'ksyms.c' (0x646bc0) of size 2048
0x0000006473d8 is located 40 bytes to the left of global variable 'latin1_syms' from 'ksyms.c' (0x647400) of size 1536
SUMMARY: AddressSanitizer: global-buffer-overflow /mnt/ram/kbd/src/libkeymap/ksyms.c:203 codetoksym
Shadow bytes around the buggy address:
0x0000800c0e20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0e30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0e50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0e60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0000800c0e70: 00 00 00 00 00 00 00 00 f9 f9 f9[f9]00 00 00 00
0x0000800c0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0e90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0ea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0eb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0000800c0ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Contiguous container OOB:fc
ASan internal: fe
==19183==ABORTING
--
Hanno Böck
https://hboeck.de/
mail/jabber: hanno@hboeck.de
GPG: BBB51E42
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next reply other threads:[~2016-03-21 9:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 9:41 Hanno Böck [this message]
2016-03-27 19:59 ` [kbd] Invalid out of bounds memory read when running make check Felix Janda
2016-04-02 16:36 ` Alexey Gladkov
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