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40 lines
1.6 KiB
Diff
40 lines
1.6 KiB
Diff
From 28ac6a15411d01301e171b8a8b0019abd57589b9 Mon Sep 17 00:00:00 2001
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From: Stephan Hartmann <stha09@googlemail.com>
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Date: Mon, 7 Feb 2022 20:09:57 +0000
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Subject: [PATCH] sandbox: build if glibc 2.34+ dynamic stack size is enabled
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Compilation of sandbox fails when using dynamic stack size in glibc
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2.34 or newer. This is because the value is not a literal anymore but
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obtained through sysconf.
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To avoid this, use memset to put zeros in the buffer.
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Change-Id: Ia479e0f799b77a10a00197aaaa0500e62546f458
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Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3436947
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Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
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Commit-Queue: José Dapena Paz <jdapena@igalia.com>
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Cr-Commit-Position: refs/heads/main@{#967943}
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---
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sandbox/linux/services/credentials.cc | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/sandbox/linux/services/credentials.cc b/sandbox/linux/services/credentials.cc
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index ca6b5954798..c933eafd163 100644
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--- a/sandbox/linux/services/credentials.cc
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+++ b/sandbox/linux/services/credentials.cc
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@@ -100,7 +100,10 @@ bool ChrootToSafeEmptyDir() {
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// TODO(crbug.com/1247458) Broken in MSan builds after LLVM f1bb30a4956f.
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clone_flags |= CLONE_VM | CLONE_VFORK | CLONE_SETTLS;
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- char tls_buf[PTHREAD_STACK_MIN] = {0};
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+ // PTHREAD_STACK_MIN can be dynamic in glibc2.34+, so it is not possible to
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+ // zeroify tls_buf assigning { 0 }
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+ char tls_buf[PTHREAD_STACK_MIN];
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+ memset(tls_buf, 0, PTHREAD_STACK_MIN);
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tls = tls_buf;
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#endif
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