From: Joseph Myers <joseph@codesourcery.com>
To: Carlos O'Donell <carlos@redhat.com>
Cc: Martin Sebor <msebor@gmail.com>, <libc-alpha@sourceware.org>
Subject: Re: [PATCH v3 5/5] avoid -Wuse-after-free [BZ #26779]
Date: Fri, 28 Jan 2022 13:10:10 +0000 [thread overview]
Message-ID: <alpine.DEB.2.22.394.2201281307110.623452@digraph.polyomino.org.uk> (raw)
In-Reply-To: <7b1e2fda-b440-ad77-4586-7e73b7c927b0@redhat.com>
Note that there are still -Wuse-after-free build failures in the testsuite
for many 32-bit platforms. E.g., on i686-linux-gnu:
tst-mallocalign1.c: In function 'do_test':
tst-mallocalign1.c:69:1: error: pointer 'p' used after 'free' [-Werror=use-after-free]
69 | }
| ^
tst-mallocalign1.c:42:3: note: call to 'free' here
42 | free (p);
| ^~~~~~~~
Also, the s390x-linux-gnu-O3 build-many-glibcs.py configuration shows
failures:
In function 'do_test',
inlined from 'legacy_test_function' at ../test-skeleton.c:55:10:
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
tst-realloc.c:134:12: error: pointer 'p' may be used after 'realloc' [-Werror=use-after-free]
134 | if (c[i] != 0xff)
| ~^~~
tst-realloc.c:124:7: note: call to 'realloc' here
124 | c = realloc (p, -1);
| ^~~~~~~~~~~~~~~
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2022-01-28 13:10 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-16 0:21 [PATCH] " Martin Sebor
2022-01-16 2:25 ` Paul Eggert
2022-01-21 23:14 ` Martin Sebor
2022-01-22 0:42 ` Paul Eggert
2022-01-25 0:42 ` Martin Sebor
2022-01-25 1:08 ` Jeff Law
2022-01-18 9:48 ` Florian Weimer
2022-01-20 21:50 ` Martin Sebor
2022-01-25 0:52 ` [PATCH v2 0/5] " Martin Sebor
2022-01-25 0:57 ` [PATCH v2 1/5] " Martin Sebor
2022-01-25 17:46 ` Carlos O'Donell
2022-01-25 0:58 ` [PATCH v2 2/5] " Martin Sebor
2022-01-25 17:46 ` Carlos O'Donell
2022-01-25 0:58 ` [PATCH v2 3/5] " Martin Sebor
2022-01-25 17:47 ` Carlos O'Donell
2022-01-25 0:58 ` [PATCH v2 4/5] " Martin Sebor
2022-01-25 17:49 ` Carlos O'Donell
2022-01-25 17:51 ` Carlos O'Donell
2022-01-25 21:47 ` Florian Weimer
2022-01-26 13:55 ` Carlos O'Donell
2022-01-25 0:58 ` [PATCH v2 5/5] " Martin Sebor
2022-01-25 17:49 ` Carlos O'Donell
2022-01-25 22:50 ` [PATCH v3 " Martin Sebor
2022-01-26 14:56 ` Carlos O'Donell
2022-01-28 13:10 ` Joseph Myers [this message]
2022-01-28 17:33 ` Carlos O'Donell
2022-01-28 17:51 ` Joseph Myers
2022-01-28 23:21 ` Jeff Law
2022-01-31 15:12 ` Carlos O'Donell
2022-02-04 20:40 ` Joseph Myers
2022-01-25 17:46 ` [PATCH v2 0/5] " Carlos O'Donell
2022-01-26 3:08 ` Martin Sebor
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