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From: Martijn Coenen <maco@android.com>
To: gregkh@linuxfoundation.org, john.stultz@linaro.org,
	tkjos@google.com, arve@android.com, amit.pundir@linaro.org
Cc: linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
	maco@google.com, Martijn Coenen <maco@android.com>
Subject: [PATCH 3/3] ANDROID: binder: fix proc->tsk check.
Date: Fri, 28 Jul 2017 13:56:08 +0200	[thread overview]
Message-ID: <20170728115608.61306-4-maco@android.com> (raw)
In-Reply-To: <20170728115608.61306-1-maco@android.com>

Commit c4ea41ba195d ("binder: use group leader instead of open thread")'
was incomplete and didn't update a check in binder_mmap(), causing all
mmap() calls into the binder driver to fail.

Signed-off-by: Martijn Coenen <maco@android.com>
---
 drivers/android/binder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index f7665c31feca..831cdd7d197d 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -3362,7 +3362,7 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
 	const char *failure_string;
 	struct binder_buffer *buffer;
 
-	if (proc->tsk != current)
+	if (proc->tsk != current->group_leader)
 		return -EINVAL;
 
 	if ((vma->vm_end - vma->vm_start) > SZ_4M)
-- 
2.14.0.rc0.400.g1c36432dff-goog

  parent reply	other threads:[~2017-07-28 11:58 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-28 11:56 [PATCH 0/3] ANDROID: binder: reconcile with android common tree Martijn Coenen
2017-07-28 11:56 ` [PATCH 1/3] ANDROID: binder: add padding to binder_fd_array_object Martijn Coenen
2017-07-28 11:56 ` [PATCH 2/3] ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES Martijn Coenen
2017-07-28 11:56 ` Martijn Coenen [this message]
2017-07-31  5:25   ` [PATCH 3/3] ANDROID: binder: fix proc->tsk check Amit Pundir
2017-08-08 17:34   ` John Stultz
2017-08-08 18:08     ` Greg KH
2017-08-08 18:24       ` John Stultz
2017-08-21 18:48       ` John Stultz
2017-08-22 15:49         ` Greg KH
2017-08-23  1:43           ` Greg KH
2017-07-28 23:22 ` [PATCH 0/3] ANDROID: binder: reconcile with android common tree Greg KH
2017-07-31  6:55   ` Martijn Coenen

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