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| author | Christopher James Halse Rogers | 2017-08-07 08:10:51 +0200 |
|---|---|---|
| committer | Christopher James Halse Rogers | 2017-08-08 03:28:25 +0200 |
| commit | cc7d1fd16d14acf08a20fbe3a6426d2cb4878768 (patch) | |
| tree | 1e6d2bc83fcc135da78719b96f59d62b43615e3d /lib/randutils.c | |
| parent | lib/randutils.c: Fall back gracefully when kernel doesn't support getrandom(2). (diff) | |
| download | kernel-qcow2-util-linux-cc7d1fd16d14acf08a20fbe3a6426d2cb4878768.tar.gz kernel-qcow2-util-linux-cc7d1fd16d14acf08a20fbe3a6426d2cb4878768.tar.xz kernel-qcow2-util-linux-cc7d1fd16d14acf08a20fbe3a6426d2cb4878768.zip | |
lib/randutils.c: More paranoia in getrandom() call.
If getrandom() is called with nbytes ≥ 256 then it can return with less than the requested
bytes filled.
In this case we *could* adjust the buffer by the number of bytes actually read, but it's
simpler to just redo the call.
Diffstat (limited to 'lib/randutils.c')
| -rw-r--r-- | lib/randutils.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/randutils.c b/lib/randutils.c index ceeb474ef..7d85dc841 100644 --- a/lib/randutils.c +++ b/lib/randutils.c @@ -100,7 +100,7 @@ void random_get_bytes(void *buf, size_t nbytes) #ifdef HAVE_GETRANDOM errno = 0; - while (getrandom(buf, nbytes, 0) < 0) { + while (getrandom(buf, nbytes, 0) != (ssize_t)nbytes) { if (errno == EINTR) continue; break; |