powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
Description: powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
JIRA: https://issues.redhat.com/browse/RHEL-29120
CVE: CVE-2023-52607
Build Info: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=59823723
Tested: Verified Brew build test kernel RPMs and confirmed issue is resovled
Signed-off-by: Mamatha Inamdar minamdar@redhat.com
powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
commit f46c8a75263f97bda13c739ba1c90aced0d3b071 Author: Kunwu Chan chentao@kylinos.cn Date: Mon Dec 4 10:32:23 2023 +0800
powerpc/mm: Fix null-pointer dereference in pgtable_cache_add
kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure. Ensure the allocation was successful
by checking the pointer validity.
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231204023223.2447523-1-chentao@kylinos.cn
Signed-off-by: Mamatha Inamdar minamdar@redhat.com
Edited by Mamatha Inamdar