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load_elf: fix iterator's type for elf file processing

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j is used while loading an ELF file to byteswap segments'
data. If data is larger than 2GB an overflow may happen.
So j should be elf_word.

This commit fixes a minor bug: it's unlikely anybody is trying to
load ELF files with 2GB+ segments for wrong-endianness targets,
but if they did, it wouldn't work correctly.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Cc: qemu-stable@nongnu.org
Fixes: 7ef295ea5b ("loader: Add data swap option to load-elf")
Signed-off-by: Anastasia Belova <abelova@astralinux.ru>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 410c2a4d75)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Anastasia Belova 2024-01-15 12:22:16 +03:00 committed by Michael Tokarev
parent c59ce9fef6
commit 2ad4ebb350
1 changed files with 1 additions and 1 deletions
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2
include/hw/elf_ops.h
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@ -499,7 +499,7 @@ static ssize_t glue(load_elf, SZ)(const char *name, int fd,
}
if (data_swab) {
int j;
elf_word j;
for (j = 0; j < file_size; j += (1 << data_swab)) {
uint8_t *dp = data + j;
switch (data_swab) {