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bsd-user/mmap.c: mmap return ENOMEM on overflow

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mmap should return ENOMEM on len overflow rather than EINVAL. Return
EINVAL when len == 0 and ENOMEM when the rounded to a page length is 0.
Found by make check-tcg.

Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
This commit is contained in:
Warner Losh 2021-09-16 18:43:01 -06:00
parent 36d5d89155
commit 14837a3f75
1 changed files with 8 additions and 1 deletions
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9
bsd-user/mmap.c
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@ -455,11 +455,18 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
goto fail;
}
len = TARGET_PAGE_ALIGN(len);
if (len == 0) {
errno = EINVAL;
goto fail;
}
/* Check for overflows */
len = TARGET_PAGE_ALIGN(len);
if (len == 0) {
errno = ENOMEM;
goto fail;
}
real_start = start & qemu_host_page_mask;
host_offset = offset & qemu_host_page_mask;