powerpc/mm: Fix null-pointer dereference in pgtable_cache_add

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[ Upstream commit f46c8a7526 ]

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: Sasha Levin <sashal@kernel.org>

...

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Kunwu Chan 2023-12-04 10:32:23 +08:00 • committed by Greg Kroah-Hartman

parent 60c3334809

commit ffd29dc45b

1 changed files with 3 additions and 2 deletions

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arch/powerpc/mm/init-common.c

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