[LTP] Fix the mremap03 syscall testcase

[linuxtestproject.agent@gmail.com]

Hi Martin,

On Wed, 14 Oct 2026, Martin Cermak wrote:
> Fix the mremap03 syscall testcase

> diff --git a/testcases/kernel/syscalls/mremap/mremap03.c b/testcases/kernel/syscalls/mremap/mremap03.c
> @@ -35,7 +35,6 @@ static void setup(void)
>  	bad_addr = tst_get_bad_addr(NULL);
> -	SAFE_MUNMAP(bad_addr, page_size);

tst_get_bad_addr() returns a mapped PROT_NONE page, which mremap() can
resize; deleting this line drops the documented unmapped-old_address case.
The test still passes because old_size is 1000 pages and extends beyond
that VMA, exercising a different EFAULT check. Keep SAFE_MUNMAP() here to
preserve coverage of an unmapped old_address.

> This patch restores the original behavior of the setup() funcrion.

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Add it at the end of the message.

Verdict - Needs revision

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