[00/11] fixes for setting values via sysfs interface

Message

Coly Li Dec. 23, 2018, 11:09 a.m. UTC

When setting bcache parameters via sysfs interface, current code has
potential overflow and results unexpected value got set. Once such
condition happens, it is very hard to find out in product environment.

This patch set is an effort to fix such overflow, to avoid further
unpected problems.

Coly Li
---
Coly Li (11):
  bcache: fix input integer overflow of congested threshold
  bcache: fix input overflow to sequential_cutoff
  bcache: add sysfs_strtoul_bool() for setting bit-field variables
  bcache: use sysfs_strtoul_bool() to set bit-field variables
  bcache: fix input overflow to writeback_delay
  bcache: fix potential div-zero error of writeback_rate_i_term_inverse
  bcache: fix potential div-zero error of writeback_rate_p_term_inverse
  bcache: fix input overflow to writeback_rate_minimum
  bcache: fix input overflow to journal_delay_ms
  bcache: fix input overflow to cache set io_error_limit
  bcache: fix input overflow to cache set sysfs file io_error_halflife

 drivers/md/bcache/sysfs.c | 61 ++++++++++++++++++++++++++++++-----------------
 drivers/md/bcache/sysfs.h | 10 ++++++++
 2 files changed, 49 insertions(+), 22 deletions(-)