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    Subject[PATCH] modpost: fix buffer overflow
    I got SIGABRT in modpost when building a module really deeply nested in
    a filesystem (path > 100 chars):

    > Building modules, stage 2.
    > MODPOST
    > *** glibc detected *** scripts/mod/modpost: realloc(): invalid next size: 0x0809f588 ***
    > [...]

    This patch fixes that problem.

    Signed-off-by: Jiri Benc <jbenc@suse.cz>

    --- linux-2.6.16-rc6.orig/scripts/mod/modpost.c
    +++ linux-2.6.16-rc6/scripts/mod/modpost.c
    @@ -552,7 +552,7 @@ void __attribute__((format(printf, 2, 3)

    va_start(ap, fmt);
    len = vsnprintf(tmp, SZ, fmt, ap);
    - if (buf->size - buf->pos < len + 1) {
    + while (buf->size - buf->pos < len + 1) {
    buf->size += 128;
    buf->p = realloc(buf->p, buf->size);
    }

    --
    Jiri Benc
    SUSE Labs
    -
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