| Message ID | 20241025183207.1827274-1-vmojzis@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | libsemanage/direct_api: INTEGER_OVERFLOW read_len = read() | expand |
diff --git a/libsemanage/src/direct_api.c b/libsemanage/src/direct_api.c index d740070d..7631c7bf 100644 --- a/libsemanage/src/direct_api.c +++ b/libsemanage/src/direct_api.c @@ -582,7 +582,7 @@ cleanup: static int read_from_pipe_to_data(semanage_handle_t *sh, size_t initial_len, int fd, char **out_data_read, size_t *out_read_len) { size_t max_len = initial_len; - size_t read_len = 0; + ssize_t read_len = 0; size_t data_read_len = 0; char *data_read = NULL;
The following statement is always true if read_len is unsigned: (read_len = read(fd, data_read + data_read_len, max_len - data_read_len)) > 0 Fixes: Error: INTEGER_OVERFLOW (CWE-190): [#def19] [important] libsemanage-3.7/src/direct_api.c:598:2: tainted_data_return: Called function "read(fd, data_read + data_read_len, max_len - data_read_len)", and a possible return value may be less than zero. libsemanage-3.7/src/direct_api.c:598:2: cast_underflow: An assign of a possibly negative number to an unsigned type, which might trigger an underflow. libsemanage-3.7/src/direct_api.c:599:3: overflow: The expression "data_read_len += read_len" is deemed underflowed because at least one of its arguments has underflowed. libsemanage-3.7/src/direct_api.c:598:2: overflow: The expression "max_len - data_read_len" is deemed underflowed because at least one of its arguments has underflowed. libsemanage-3.7/src/direct_api.c:598:2: overflow_sink: "max_len - data_read_len", which might have underflowed, is passed to "read(fd, data_read + data_read_len, max_len - data_read_len)". [Note: The source code implementation of the function has been overridden by a builtin model.] \# 596| } \# 597| \# 598|-> while ((read_len = read(fd, data_read + data_read_len, max_len - data_read_len)) > 0) { \# 599| data_read_len += read_len; \# 600| if (data_read_len == max_len) { Signed-off-by: Vit Mojzis <vmojzis@redhat.com> --- libsemanage/src/direct_api.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)