Message 318260 - Python tracker

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Author	cgohlke
Recipients	cgohlke
Date	2018-05-31.06:31:10
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1527748270.57.0.682650639539.issue33706@psf.upfronthosting.co.za>
In-reply-to

Content
When testing Python 3.7.0b5 x64 (and betas before) on Windows 10, I occasionally get segfaults when passing a program as string on the command line. The shortest command to reproduce this on my system is `python.exe -c 1` with heap detection turned on but that might not be reproducible on other systems. It turns out there is a buffer over-read when copying the `PyOS_optarg` string in `main.c`. The attached patch fixes the segfault on my system.

When testing Python 3.7.0b5 x64 (and betas before) on Windows 10, I occasionally get segfaults when passing a program as string on the command line. The shortest command to reproduce this on my system is `python.exe -c 1` with heap detection turned on but that might not be reproducible on other systems.

It turns out there is a buffer over-read when copying the `PyOS_optarg` string in `main.c`. The attached patch fixes the segfault on my system.

History
Date	User	Action	Args
2018-05-31 06:31:10	cgohlke	set	recipients: + cgohlke
2018-05-31 06:31:10	cgohlke	set	messageid: <1527748270.57.0.682650639539.issue33706@psf.upfronthosting.co.za>
2018-05-31 06:31:10	cgohlke	link	issue33706 messages
2018-05-31 06:31:10	cgohlke	create