[flashrom-gerrit] Change in flashrom[master]: helpers.c: Fix undefined behavior in strndup()

[Xiang Wang (Code Review)]

Attention is currently required from: Xiang Wang, Stefan Reinauer, Edward O'Callaghan.
Hello build bot (Jenkins), Stefan Reinauer, Edward O'Callaghan,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/49741

to look at the new patch set (#2).

Change subject: helpers.c: Fix undefined behavior in strndup()
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helpers.c: Fix undefined behavior in strndup()

Using strlen() or strdup() inside strndup() is problematic: if the
input string is not null-terminated, these functions can read past the
end of the buffer, which triggers undefined behavior. Rewrite the
function to never read past the provided `maxlen` bound.

Change-Id: Id34127024085879228626fbad59af03268ec5255
Signed-off-by: Xiang Wang 
---
M helpers.c
1 file changed, 9 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/41/49741/2