A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 10:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

Slab allocators: fail if ksize is called with a NULL parameter

Browse source 
A NULL pointer means that the object was not allocated.  One cannot
determine the size of an object that has not been allocated.  Currently we
return 0 but we really should BUG() on attempts to determine the size of
something nonexistent.

krealloc() interprets NULL to mean a zero sized object.  Handle that
separately in krealloc().

Signed-off-by: Christoph Lameter <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: Matt Mackall <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Lameter 2007-10-16 01:24:46 -07:00 • committed by Linus Torvalds
commit ef8b4520bd
4 changed files with 10 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

3
mm/slab.c
View file

@ -4446,7 +4446,8 @@ const struct seq_operations slabstats_op = {
*/
size_t ksize(const void *objp)
{
if (unlikely(ZERO_OR_NULL_PTR(objp)))
BUG_ON(!objp);
if (unlikely(objp == ZERO_SIZE_PTR))
return 0;
return obj_size(virt_to_cache(objp));