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| author | Andrew Donnellan <ajd@linux.ibm.com> | 2023-02-10 11:03:37 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-12 14:12:36 +0300 |
| commit | fcf63d6b8ab9b12c2ce1b4bde12a3c391029c998 (patch) | |
| tree | 19914360c5e6aa2c1f3a248c4ddb837657dbbb54 /include/linux/timerqueue.h | |
| parent | f74dcbfd27c647af9b7b83f3711c63712c677abd (diff) | |
| download | linux-fcf63d6b8ab9b12c2ce1b4bde12a3c391029c998.tar.xz | |
powerpc/pseries: Fix alignment of PLPKS structures and buffers
A number of structures and buffers passed to PKS hcalls have alignment
requirements, which could on occasion cause problems:
- Authorisation structures must be 16-byte aligned and must not cross a
page boundary
- Label structures must not cross page boundaries
- Password output buffers must not cross page boundaries
To ensure correct alignment, we adjust the allocation size of each of
these structures/buffers to be the closest power of 2 that is at least the
size of the structure/buffer (since kmalloc() guarantees that an
allocation of a power of 2 size will be aligned to at least that size).
Reported-by: Benjamin Gray <bgray@linux.ibm.com>
Fixes: 2454a7af0f2a ("powerpc/pseries: define driver for Platform KeyStore")
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230210080401.345462-3-ajd@linux.ibm.com
Diffstat (limited to 'include/linux/timerqueue.h')
0 files changed, 0 insertions, 0 deletions