tree 9b9879d8b8cc055e4bb8eabd69b979a17e6e52cd
parent 2d684cd6d9cf0c6a0e28978362671b6e2d8fb56c
author Jiri Kosina <jkosina@suse.cz> 1202333984 +0100
committer Ingo Molnar <mingo@elte.hu> 1202333984 +0100

brk: check the lower bound properly

There is a check in sys_brk(), that tries to make sure that we do not
underflow the area that is dedicated to brk heap.

The check is however wrong, as it assumes that brk area starts immediately
after the end of the code (+bss), which is wrong for example in
environments with randomized brk start. The proper way is to check whether
the address is not below the start_brk address.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>