* Re: bug#34141: Stackoverflow triggered at lib/regexec.c:1948
[not found] <CAJPBKOFUAV6f1BRt21iyGwyRS+QGrcVz4WqEfkYvkyqtCs_mLA@mail.gmail.com>
@ 2019-01-20 9:20 ` Assaf Gordon
0 siblings, 0 replies; only message in thread
From: Assaf Gordon @ 2019-01-20 9:20 UTC (permalink / raw)
To: Hongxu Chen, 34141, bug-gnulib@gnu.org List
(forwarding to gnulib)
Hello,
Hongxu Chen reported a stack-overflow in regexec.
I suspect it is the same as the one reported here:
https://lists.gnu.org/r/bug-gnulib/2018-09/msg00066.html
But just in case, the full report is below.
regards,
- assaf
On 2019-01-19 10:58 p.m., Hongxu Chen wrote:
> Hi,
>
> Latest sed (4.7.4-f8503-dirty; and prior to this, e.g. 4.4) may trigger
> a stack overflow error by executing the following command.
>
> echo 0 | ./sed '/\(\)\(\1\(\)\1\(\)\)*/c0' # equivalently sed -f
> c01.sed c01.in
>
> ASan reports like this:
> AddressSanitizer:DEADLYSIGNAL
>
>
>
> =================================================================
>
>
>
> ==26879==ERROR: AddressSanitizer: stack-overflow on address 0x7ffea609bff8
> (pc 0x0000005b0b76 bp 0x7ffea609c090 sp 0x7ffea609bf20 T0)
>
>
> #0 0x5b0b75 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1912:18
>
>
> #1 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #2 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #3 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #4 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #5 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #6 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #7 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
> ...
> #247 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #248 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
> #249 0x5b0ed3 in check_dst_limits_calc_pos_1
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1948:7
>
>
>
>
>
>
> SUMMARY: AddressSanitizer: stack-overflow
> /home/hongxu/FOT/sed-O0/./lib/regexec.c:1912:18 in
> check_dst_limits_calc_pos_1
>
> ==26879==ABORTING
>
> Best Regards,
> Hongxu
>
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