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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2012-10-22 09:49:02 -0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-13 05:02:26 -0500 |
| commit | d55c4c613fc4d4ad2ba0fc6fa2b57176d420f7e4 (patch) | |
| tree | 4e28b1a01016e285876876a1c6eb7ba8127f9072 /lib/test-string_helpers.c | |
| parent | 658e5ce705f2a09ab681eb61ca7c8619bb7a783d (diff) | |
s390/gup: add missing TASK_SIZE check to get_user_pages_fast()
When walking page tables we need to make sure that everything
is within bounds of the ASCE limit of the task's address space.
Otherwise we might calculate e.g. a pud pointer which is not
within a pud and dereference it.
So check against TASK_SIZE (which is the ASCE limit) before
walking page tables.
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions