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32 lines
1.5 KiB
Diff
32 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Julien Cristau <jcristau@mozilla.com>
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Date: Sun, 6 Sep 2020 20:20:39 +0000
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Subject: [PATCH] Bug 1660901 - ignore AT_NO_AUTOMOUNT in fstatat system call.
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r=jld
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Per the manpage "Both stat() and lstat() act as though AT_NO_AUTOMOUNT
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was set.", so don't bail if it's set in a call to fstatat.
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Differential Revision: https://phabricator.services.mozilla.com/D89121
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---
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security/sandbox/linux/SandboxFilter.cpp | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/security/sandbox/linux/SandboxFilter.cpp b/security/sandbox/linux/SandboxFilter.cpp
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index 4087bdc07e01..c4f6c318ad1c 100644
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--- a/security/sandbox/linux/SandboxFilter.cpp
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+++ b/security/sandbox/linux/SandboxFilter.cpp
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@@ -254,9 +254,10 @@ class SandboxPolicyCommon : public SandboxPolicyBase {
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fd, path, buf, flags);
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return BlockedSyscallTrap(aArgs, nullptr);
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}
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- if ((flags & ~AT_SYMLINK_NOFOLLOW) != 0) {
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+ if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT)) != 0) {
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SANDBOX_LOG_ERROR("unsupported flags %d in fstatat(%d, \"%s\", %p, %d)",
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- (flags & ~AT_SYMLINK_NOFOLLOW), fd, path, buf, flags);
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+ (flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT)), fd,
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+ path, buf, flags);
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return BlockedSyscallTrap(aArgs, nullptr);
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}
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return (flags & AT_SYMLINK_NOFOLLOW) == 0 ? broker->Stat(path, buf)
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