bcache: fix input overflow to writeback_rate_minimum
dc->writeback_rate_minimum is type unsigned integer variable, it is set via sysfs interface, and converte from input string to unsigned integer by d_strtoul_nonzero(). When the converted input value is larger than UINT_MAX, overflow to unsigned integer happens. This patch fixes the overflow by using sysfs_strotoul_clamp() to convert input string and limit the value in range [1, UINT_MAX], then the overflow can be avoided. Signed-off-by:Coly Li <colyli@suse.de> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
5b5fd3c9
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