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From: "Dmitriy.Poterukha at uvoteam dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/87191] UBSan doesn't catch invalid pointer arithmetic outside known object bounds
Date: Thu, 06 Oct 2022 12:33:16 +0000 [thread overview]
Message-ID: <bug-87191-4-Da1BuLf3qk@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-87191-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87191
--- Comment #6 from creeon <Dmitriy.Poterukha at uvoteam dot com> ---
#0 0x401191 in bar (/home/marxin/Programming/testcases/a.out+0x401191)
#1 0x40122a in main https://stemhave.com/programming-help.html
(/home/marxin/Programming/testcases/a.out+0x40122a)
#2 0x7ffff6c71fea in __libc_start_main ../csu/libc-start.c:308
#3 0x4010a9 in _start (/home/marxin/Programming/testcases/a.out+0x4010a9)
At a minimum we should diagnose if offsetting a pointer to a toplevel object
not by 0/1 (ideally also if not by 0 and then dereferencing?), e.g.:
warning: creating out-of-bounds pointer based on complete object 'a'
How i canl all fix it?
prev parent reply other threads:[~2022-10-06 12:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-87191-4@http.gcc.gnu.org/bugzilla/>
2022-10-06 12:32 ` Dmitriy.Poterukha at uvoteam dot com
2022-10-06 12:33 ` Dmitriy.Poterukha at uvoteam dot com [this message]
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