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[Bug libc/21752] New: __stack_chk_fail should do as little work as possible
- From: "fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 11 Jul 2017 23:46:25 +0000
- Subject: [Bug libc/21752] New: __stack_chk_fail should do as little work as possible
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=21752
Bug ID: 21752
Summary: __stack_chk_fail should do as little work as possible
Product: glibc
Version: 2.26
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: fweimer at redhat dot com
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Flags: security+
The fix for bug 12189 only removed the backtrace. We still flush the stdio
streams, which can actually perform indirect function calls. There might be
other things we should remove. We should not call anything but write(v),
sigaction/sginal, getpid and kill.
Tagging security+ in accordance with bug 12189.
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