Message ID | 1422270747-23994-6-git-send-email-pbonzini@redhat.com |
---|---|
State | New |
Headers | show |
26.01.2015 14:12, Paolo Bonzini wrote: > Avoid truncation of a 64-bit long to a 32-bit int, and check for errno > (especially ERANGE). > > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > util/cutils.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/util/cutils.c b/util/cutils.c > index dbe7412..f227064 100644 > --- a/util/cutils.c > +++ b/util/cutils.c > @@ -523,7 +523,7 @@ int parse_debug_env(const char *name, int max, int initial) > { > char *debug_env = getenv(name); > char *inv = NULL; > - int debug; > + long debug; > > if (!debug_env) { > return initial; > @@ -532,7 +532,7 @@ int parse_debug_env(const char *name, int max, int initial) > if (inv == debug_env) { > return initial; > } > - if (debug < 0 || debug > max) { > + if (debug < 0 || debug > max || errno != 0) { It is not really right to check errno without (re)setting it before call to strtol(). Thanks, /mjt
diff --git a/util/cutils.c b/util/cutils.c index dbe7412..f227064 100644 --- a/util/cutils.c +++ b/util/cutils.c @@ -523,7 +523,7 @@ int parse_debug_env(const char *name, int max, int initial) { char *debug_env = getenv(name); char *inv = NULL; - int debug; + long debug; if (!debug_env) { return initial; @@ -532,7 +532,7 @@ int parse_debug_env(const char *name, int max, int initial) if (inv == debug_env) { return initial; } - if (debug < 0 || debug > max) { + if (debug < 0 || debug > max || errno != 0) { fprintf(stderr, "warning: %s not in [0, %d]", name, max); return initial; }
Avoid truncation of a 64-bit long to a 32-bit int, and check for errno (especially ERANGE). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- util/cutils.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)