target/s390x/arch_dump: Fix memory corruption in s390x_write_elf64_notes()
"note_size" can be smaller than sizeof(note), so unconditionally calling
memset(notep, 0, sizeof(note)) could cause a memory corruption here in
case notep has been allocated dynamically, thus let's use note_size as
length argument for memset() instead.
Reported-by: Sebastian Mitterle <smitterl@redhat.com>
Fixes: 113d8f4e95
("s390x: pv: Add dump support")
Message-Id: <20230214141056.680969-1-thuth@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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@ -248,7 +248,7 @@ static int s390x_write_elf64_notes(const char *note_name,
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notep = g_malloc(note_size);
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}
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memset(notep, 0, sizeof(note));
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memset(notep, 0, note_size);
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/* Setup note header data */
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notep->hdr.n_descsz = cpu_to_be32(content_size);
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