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powerpc/boot: Only free if realloc() succeeds

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[ Upstream commit f2d5bccaca ]

simple_realloc() frees the original buffer (ptr) even if the
reallocation failed.

Fix it to behave like standard realloc() and only free the original
buffer if the reallocation succeeded.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240229115149.749264-1-mpe@ellerman.id.au
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michael Ellerman 2024-02-29 22:51:49 +11:00 committed by Greg Kroah-Hartman
parent 9c96b5b056
commit 97db7b5987
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/boot/simple_alloc.c
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@ -112,10 +112,11 @@ static void *simple_realloc(void *ptr, unsigned long size)
return ptr; return ptr;
new = simple_malloc(size); new = simple_malloc(size);
if (new) if (new) {
memcpy(new, ptr, p->size); memcpy(new, ptr, p->size);
simple_free(ptr); simple_free(ptr);
}
return new; return new;
} }