diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2019-10-15 21:46:03 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-10-31 07:22:53 -0400 |
| commit | 02e8a8241bb5fff315f3e721992220428f288b6d (patch) | |
| tree | f853f2c6876329ed66b2f2e7c1cd763ec82d60cb /lib | |
| parent | 80e7e7c2aba5793a1e39592cd53de9e5aca96f0b (diff) | |
| download | u-boot-02e8a8241bb5fff315f3e721992220428f288b6d.tar.gz | |
lib: errno: check for unsupported error number
If errno_str() is called with an unsupported error number, do not return a
random pointer but a reasonable text.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/errno_str.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/errno_str.c b/lib/errno_str.c index 0ba950e970..bb8f9fbeb3 100644 --- a/lib/errno_str.c +++ b/lib/errno_str.c @@ -136,6 +136,8 @@ static const char * const errno_message[] = { ERRNO_MSG(EDQUOT, "Quota exceeded"), ERRNO_MSG(ENOMEDIUM, "No medium found"), ERRNO_MSG(EMEDIUMTYPE, "Wrong medium type"), + /* Message for unsupported error numbers */ + ERRNO_MSG(0, "Unknown error"), }; const char *errno_str(int errno) @@ -143,5 +145,9 @@ const char *errno_str(int errno) if (errno >= 0) return errno_message[0]; - return errno_message[abs(errno)]; + errno = -errno; + if (errno >= ARRAY_SIZE(errno_message)) + errno = ARRAY_SIZE(errno_message) - 1; + + return errno_message[errno]; } |