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| author | Coly Li <colyli@suse.de> | 2019-02-09 12:53:01 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-02-09 07:18:32 -0700 |
| commit | 8c27a3953e92eb0b22dbb03d599f543a05f9574e (patch) | |
| tree | c114e4792522bd136d5e1785cde5e1eac8e1ad39 /drivers/md/raid0.c | |
| parent | f54478c6e226bb1540a3e58366601039dfd778e2 (diff) | |
| download | linux-8c27a3953e92eb0b22dbb03d599f543a05f9574e.tar.gz linux-8c27a3953e92eb0b22dbb03d599f543a05f9574e.tar.bz2 linux-8c27a3953e92eb0b22dbb03d599f543a05f9574e.zip | |
bcache: fix input overflow to sequential_cutoff
People may set sequential_cutoff of a cached device via sysfs file,
but current code does not check input value overflow. E.g. if value
4294967295 (UINT_MAX) is written to file sequential_cutoff, its value
is 4GB, but if 4294967296 (UINT_MAX + 1) is written into, its value
will be 0. This is an unexpected behavior.
This patch replaces d_strtoi_h() by sysfs_strtoul_clamp() to convert
input string to unsigned integer value, and limit its range in
[0, UINT_MAX]. Then the input overflow can be fixed.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/raid0.c')
0 files changed, 0 insertions, 0 deletions