Issue 5292: mmap crashes just on boundary. (original) (raw)

Issue5292

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classification

Title:	mmap crashes just on boundary.
Type:	crash	Stage:
Components:	Extension Modules	Versions:	Python 3.0, Python 3.1, Python 2.7, Python 2.6

process

Status:	closed	Resolution:	fixed
Dependencies:		Superseder:
Assigned To:		Nosy List:	ocean-city
Priority:	normal	Keywords:	patch

Created on 2009-02-17 09:35 by ocean-city, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Files
File name	Uploaded	Description	Edit
fix_segfault_on_boundary.patch	ocean-city,2009-02-17 09:42

Messages (3)
msg82307 - (view)	Author: Hirokazu Yamamoto (ocean-city) *	Date: 2009-02-17 09:35
I noticed following code crashes. I'll post fix soon. import mmap import os def main(): align = mmap.ALLOCATIONGRANULARITY path = os.path.splitext(__file__)[0] + ".txt" with open(path, "w") as f: f.write("0" * align) f.write("1" * align) f.write("2" * align) with open(path, "r+") as f: m = mmap.mmap(f.fileno(), align) m[align] # crash m[align] = '1' # crash too if __name__ == '__main__': main()
msg82308 - (view)	Author: Hirokazu Yamamoto (ocean-city) *	Date: 2009-02-17 09:42
Here is a patch.
msg82314 - (view)	Author: Hirokazu Yamamoto (ocean-city) *	Date: 2009-02-17 10:13
This is obvious bug (and fix is obvious too), so I've commited in r69714.

History
Date	User	Action	Args
2022-04-11 14:56:45	admin	set	github: 49542
2009-02-17 10:13:42	ocean-city	set	status: open -> closedresolution: fixedmessages: +
2009-02-17 09:42:11	ocean-city	set	files: + fix_segfault_on_boundary.patchkeywords: + patchmessages: +
2009-02-17 09:35:55	ocean-city	create