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Commit cd146e31 authored by Li zeming's avatar Li zeming Committed by Greg Kroah-Hartman
Browse files

powerpc/boot: Handle allocation failure in simple_realloc() 



[ Upstream commit 69b0194ccec033c208b071e019032c1919c2822d ]

simple_malloc() will return NULL when there is not enough memory left.
Check pointer 'new' before using it to copy the old data.

Signed-off-by: default avatarLi zeming <zeming@nfschina.com>
[mpe: Reword subject, use change log from Christophe]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20221219021816.3012-1-zeming@nfschina.com


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent fea29d47

arch/powerpc/boot/simple_alloc.c

+3 −1
Original line number Diff line number Diff line
@@ -114,7 +114,9 @@ static void *simple_realloc(void *ptr, unsigned long size) 
		return ptr;



	new = simple_malloc(size);

	if (new)

		memcpy(new, ptr, p->size);



	simple_free(ptr);

	return new;

}