linux-stable-mirror

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2026-07-08 18:13:59 +02:00

Files

T

Heiko Carstens 2c5c0f4dc8 s390/stackleak: Fix __stackleak_poison() inline assembly constraint

commit 674c5ff0f4 upstream.

The __stackleak_poison() inline assembly comes with a "count" operand where
the "d" constraint is used. "count" is used with the exrl instruction and
"d" means that the compiler may allocate any register from 0 to 15.

If the compiler would allocate register 0 then the exrl instruction would
not or the value of "count" into the executed instruction - resulting in a
stackframe which is only partially poisoned.

Use the correct "a" constraint, which excludes register 0 from register
allocation.

Fixes: 2a405f6bb3 ("s390/stackleak: provide fast __stackleak_poison() implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/r/20260302133500.1560531-4-hca@linux.ibm.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-03-25 11:06:01 +01:00

alpha

…

arc

…

arm

ARM: clean up the memset64() C wrapper

2026-03-25 11:05:38 +01:00

arm64

arm64: mm: Don't remap pgtables for allocate vs populate

2026-03-25 11:05:58 +01:00

csky