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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug libc/31798] pidfd_getpid.c is miscompiled by GCC 6.4 Date: Mon, 27 May 2024 13:53:26 +0000 [thread overview] Message-ID: <bug-31798-131-0DYs33uA7B@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-31798-131@http.sourceware.org/bugzilla/> https://sourceware.org/bugzilla/show_bug.cgi?id=31798 --- Comment #2 from Sourceware Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by H.J. Lu <hjl@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f981bf6b9db87e0732b46bfe92fdad4d363225e8 commit f981bf6b9db87e0732b46bfe92fdad4d363225e8 Author: H.J. Lu <hjl.tools@gmail.com> Date: Sat May 25 05:13:41 2024 -0700 parse_fdinfo: Don't advance pointer twice [BZ #31798] pidfd_getpid.c has /* Ignore invalid large values. */ if (INT_MULTIPLY_WRAPV (10, n, &n) || INT_ADD_WRAPV (n, *l++ - '0', &n)) return -1; For GCC older than GCC 7, INT_ADD_WRAPV(a, b, r) is defined as _GL_INT_OP_WRAPV (a, b, r, +, _GL_INT_ADD_RANGE_OVERFLOW) and *l++ - '0' is evaluated twice. Fix BZ #31798 by moving "l++" out of the if statement. Tested with GCC 6.4 and GCC 14.1. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> -- You are receiving this mail because: You are on the CC list for the bug.
next prev parent reply other threads:[~2024-05-27 13:53 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-05-25 11:03 [Bug libc/31798] New: " hjl.tools at gmail dot com 2024-05-25 12:00 ` [Bug libc/31798] " hjl.tools at gmail dot com 2024-05-25 12:08 ` hjl.tools at gmail dot com 2024-05-26 7:12 ` sam at gentoo dot org 2024-05-27 13:53 ` cvs-commit at gcc dot gnu.org [this message] 2024-05-27 14:42 ` cvs-commit at gcc dot gnu.org 2024-05-27 14:42 ` hjl.tools at gmail dot com
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