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kernel: receive_data and send_data can be called with a NULL buffer.

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Change-Id: Id2ac496524ad91f2830e8af12925e0e40ca9ab80
Reviewed-on: https://review.haiku-os.org/c/1333
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
This commit is contained in:
Jérôme Duval 2019-03-30 01:20:53 +01:00 committed by waddlesplash
parent 03ed26b691
commit 633fbcf423
1 changed files with 3 additions and 2 deletions
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5
src/system/kernel/thread.cpp
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@ -3665,7 +3665,7 @@ status_t
_user_send_data(thread_id thread, int32 code, const void *buffer,
size_t bufferSize)
{
if (!IS_USER_ADDRESS(buffer))
if (buffer != NULL && !IS_USER_ADDRESS(buffer))
return B_BAD_ADDRESS;
return send_data_etc(thread, code, buffer, bufferSize,
@ -3681,8 +3681,9 @@ _user_receive_data(thread_id *_userSender, void *buffer, size_t bufferSize)
status_t code;
if ((!IS_USER_ADDRESS(_userSender) && _userSender != NULL)
|| !IS_USER_ADDRESS(buffer))
|| (!IS_USER_ADDRESS(buffer) && buffer != NULL)) {
return B_BAD_ADDRESS;
}
code = receive_data_etc(&sender, buffer, bufferSize, B_KILL_CAN_INTERRUPT);
// supports userland buffers