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| author | Marek Behún <marek.behun@nic.cz> | 2020-02-15 15:21:30 +0100 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2020-02-15 10:33:19 -0800 |
| commit | 3bf3c9744694803bd2d6f0ee70a6369b980530fd (patch) | |
| tree | fd5cfc9f84d65e7b14e8f26bc585416223f19525 | |
| parent | bab8f1ff17da0701bb580fcb025de6fca0da3dcf (diff) | |
| download | lwn-3bf3c9744694803bd2d6f0ee70a6369b980530fd.tar.gz lwn-3bf3c9744694803bd2d6f0ee70a6369b980530fd.zip | |
bus: moxtet: fix potential stack buffer overflow
The input_read function declares the size of the hex array relative to
sizeof(buf), but buf is a pointer argument of the function. The hex
array is meant to contain hexadecimal representation of the bin array.
Link: https://lore.kernel.org/r/20200215142130.22743-1-marek.behun@nic.cz
Fixes: 5bc7f990cd98 ("bus: Add support for Moxtet bus")
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reported-by: sohu0106 <sohu0106@126.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
| -rw-r--r-- | drivers/bus/moxtet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/bus/moxtet.c b/drivers/bus/moxtet.c index 15fa293819a0..b20fdcbd035b 100644 --- a/drivers/bus/moxtet.c +++ b/drivers/bus/moxtet.c @@ -465,7 +465,7 @@ static ssize_t input_read(struct file *file, char __user *buf, size_t len, { struct moxtet *moxtet = file->private_data; u8 bin[TURRIS_MOX_MAX_MODULES]; - u8 hex[sizeof(buf) * 2 + 1]; + u8 hex[sizeof(bin) * 2 + 1]; int ret, n; ret = moxtet_spi_read(moxtet, bin); |