Merge branch 'slab/for-6.2/kmalloc_redzone' into slab/for-next

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kmalloc() redzone improvements by Feng Tang

From cover letter [1]:

kmalloc's API family is critical for mm, and one of its nature is that
it will round up the request size to a fixed one (mostly power of 2).
When user requests memory for '2^n + 1' bytes, actually 2^(n+1) bytes
could be allocated, so there is an extra space than what is originally
requested.

This patchset tries to extend the redzone sanity check to the extra
kmalloced buffer than requested, to better detect un-legitimate access
to it. (depends on SLAB_STORE_USER & SLAB_RED_ZONE)

[1] https://lore.kernel.org/all/20221021032405.1825078-1-feng.tang@intel.com/

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This commit is contained in:

Vlastimil Babka 2022-11-11 09:08:18 +01:00

parent 76537db3b9 946fa0dbf2

commit 90e9b23a60

6 changed files with 98 additions and 23 deletions

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5

include/linux/kasan.h

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