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authorJeremy Fitzhardinge <jeremy@xensource.com>2006-06-25 05:49:17 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-25 10:01:23 -0700
commitf796937a062c7aeb44cd0e75e1586c8543634a7d (patch)
treec3cfcbb27e291621e31cff71288f3e82d8b149a8 /.gitignore
parent891c668b90ded38cec36f0852c4983573597170d (diff)
[PATCH] Fix bounds check in vsnprintf, to allow for a 0 size and NULL buffer
This change allows callers to use a 0-byte buffer and a NULL buffer pointer with vsnprintf, so it can be used to determine how large the resulting formatted string will be. Previously the code effectively treated a size of 0 as a size of 4G (on 32-bit systems), with other checks preventing it from actually trying to emit the string - but the terminal \0 would still be written, which would crash if the buffer is NULL. This change changes the boundary check so that 'end' points to the putative location of the terminal '\0', which is only written if size > 0. vsnprintf still allows the buffer size to be set very large, to allow unbounded buffer sizes (to implement sprintf, etc). [akpm@osdl.org: fix long-vs-longlong confusion] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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0 files changed, 0 insertions, 0 deletions