5.4-stable review patch. If anyone has any objections, please let me know.
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From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ Upstream commit d3601857e14de6369f00ae19564f1d817d175d19 ]
This error handling looks really strange. Check if the string has been truncated instead.
Fixes: f0c2319f9f19 ("regmap: Expose the driver name in debugfs") Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr Link: https://lore.kernel.org/r/8595de2462c490561f70020a6d11f4d6b652b468.169385782... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/regmap/regmap-debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 4f2ff1b2b4502..214d19d1337d3 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -49,7 +49,7 @@ static ssize_t regmap_name_read_file(struct file *file, name = map->dev->driver->name;
ret = snprintf(buf, PAGE_SIZE, "%s\n", name); - if (ret < 0) { + if (ret >= PAGE_SIZE) { kfree(buf); return ret; }