diff options
Diffstat (limited to 'src/common/util.c')
| -rw-r--r-- | src/common/util.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/common/util.c b/src/common/util.c index 6fb597a3a5..b16afa13e9 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -3256,10 +3256,10 @@ format_hex_number_for_helper_exit_status(unsigned int x, char *buf, * <b>hex_errno</b>. Called between fork and _exit, so must be signal-handler * safe. * - * <b>hex_errno</b> must have at least HEX_ERRNO_SIZE bytes available. + * <b>hex_errno</b> must have at least HEX_ERRNO_SIZE+1 bytes available. * * The format of <b>hex_errno</b> is: "CHILD_STATE/ERRNO\n", left-padded - * with spaces. Note that there is no trailing \0. CHILD_STATE indicates where + * with spaces. CHILD_STATE indicates where * in the processs of starting the child process did the failure occur (see * CHILD_STATE_* macros for definition), and SAVED_ERRNO is the value of * errno when the failure occurred. @@ -3294,7 +3294,7 @@ format_helper_exit_status(unsigned char child_state, int saved_errno, * Count how many chars of space we have left, and keep a pointer into the * current point in the buffer. */ - left = HEX_ERRNO_SIZE; + left = HEX_ERRNO_SIZE+1; cur = hex_errno; /* Emit child_state */ @@ -3338,8 +3338,8 @@ format_helper_exit_status(unsigned char child_state, int saved_errno, left -= written; cur += written; - /* Check that we have enough space left for a newline */ - if (left <= 0) + /* Check that we have enough space left for a newline and a NUL */ + if (left <= 1) goto err; /* Emit the newline and NUL */ @@ -3594,7 +3594,7 @@ tor_spawn_background(const char *const filename, const char **argv, this is used for printing out the error message */ unsigned char child_state = CHILD_STATE_INIT; - char hex_errno[HEX_ERRNO_SIZE]; + char hex_errno[HEX_ERRNO_SIZE + 2]; /* + 1 should be sufficient actually */ static int max_fd = -1; |