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ad579b6681
1162f81c237b111f05db99ab11f242089d3f10abcf485dcf9xc5db5a9f9eSigned-off-by: Tad <tad@spotco.us>
31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Micay <danielmicay@gmail.com>
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Date: Sat, 2 Jan 2021 20:17:35 -0500
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Subject: [PATCH] fix use-after-free in adbd_auth
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The writev call is using references to data from the packet after it's
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popped from the queue. This was discovered in GrapheneOS due to using
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zero-on-free by default. It ends up resulting in adb being unable to
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persistently whitelist keys.
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Change-Id: Ibd9c1c4170bfe632b598b7666d09e4ce939a9e95
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---
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libs/adbd_auth/adbd_auth.cpp | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/libs/adbd_auth/adbd_auth.cpp b/libs/adbd_auth/adbd_auth.cpp
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index dae6eebaa5..15bd5c3913 100644
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--- a/libs/adbd_auth/adbd_auth.cpp
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+++ b/libs/adbd_auth/adbd_auth.cpp
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@@ -282,9 +282,8 @@ public:
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LOG(FATAL) << "adbd_auth: unhandled packet type?";
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}
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- output_queue_.pop_front();
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-
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ssize_t rc = writev(framework_fd_.get(), iovs, iovcnt);
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+ output_queue_.pop_front();
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if (rc == -1 && errno != EAGAIN && errno != EWOULDBLOCK) {
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PLOG(ERROR) << "adbd_auth: failed to write to framework fd";
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ReplaceFrameworkFd(unique_fd());
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