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| author |   Takashi Iwai <tiwai@suse.de> | 2020-03-11 10:04:26 +0100 |
|---|---|---|
| committer |   Dominik Brodowski <linux@dominikbrodowski.net> | 2020-03-14 14:32:04 +0100 |
| commit | 6d3fbe919b839bae9d8ed22b4ae5a17b05cb209e (patch) | |
| tree | 979cca5bcec42f3039a78ee882bf3c91719f378b /drivers/pcmcia/yenta_socket.c | |
| parent | pcmcia: omap: remove useless cast for driver.name (diff) | |
| download | wireguard-linux-6d3fbe919b839bae9d8ed22b4ae5a17b05cb209e.tar.xz wireguard-linux-6d3fbe919b839bae9d8ed22b4ae5a17b05cb209e.zip | |
pcmcia: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit. Fix it by replacing with scnprintf().
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia/yenta_socket.c')
| -rw-r--r-- | drivers/pcmcia/yenta_socket.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index 49b1c6a1bdbe..bf6529b0b5b0 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -180,12 +180,12 @@ static ssize_t show_yenta_registers(struct device *yentadev, struct device_attri for (i = 0; i < 0x24; i += 4) { unsigned val; if (!(i & 15)) - offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i); + offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i); val = cb_readl(socket, i); - offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val); + offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %08x", val); } - offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:"); + offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:"); for (i = 0; i < 0x45; i++) { unsigned char val; if (!(i & 7)) { @@ -193,10 +193,10 @@ static ssize_t show_yenta_registers(struct device *yentadev, struct device_attri memcpy(buf + offset, " -", 2); offset += 2; } else - offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i); + offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i); } val = exca_readb(socket, i); - offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val); + offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %02x", val); } buf[offset++] = '\n'; return offset; |