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| author | Dmitry V. Levin | 2015-12-27 00:13:27 +0100 |
|---|---|---|
| committer | David S. Miller | 2016-01-14 19:06:09 +0100 |
| commit | 525fd5a94e1be0776fa652df5c687697db508c91 (patch) | |
| tree | 11abdf7711fb6e14cc54f546762ef0754bd9933d /arch/sparc/mm | |
| parent | Merge tag 'xfs-for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| download | kernel-qcow2-linux-525fd5a94e1be0776fa652df5c687697db508c91.tar.gz kernel-qcow2-linux-525fd5a94e1be0776fa652df5c687697db508c91.tar.xz kernel-qcow2-linux-525fd5a94e1be0776fa652df5c687697db508c91.zip | |
sparc64: fix incorrect sign extension in sys_sparc64_personality
The value returned by sys_personality has type "long int".
It is saved to a variable of type "int", which is not a problem
yet because the type of task_struct->pesonality is "unsigned int".
The problem is the sign extension from "int" to "long int"
that happens on return from sys_sparc64_personality.
For example, a userspace call personality((unsigned) -EINVAL) will
result to any subsequent personality call, including absolutely
harmless read-only personality(0xffffffff) call, failing with
errno set to EINVAL.
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/mm')
0 files changed, 0 insertions, 0 deletions