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| author | Christian Marangi <ansuelsmth@gmail.com> | 2023-10-24 20:30:15 +0200 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2023-11-13 10:48:49 +0900 |
| commit | 08e23d05fa6dc4fc13da0ccf09defdd4bbc92ff4 (patch) | |
| tree | d5bbcc54df9fc80e7f36a07fd9f7e20ba9f4ba35 /lib/cpumask.c | |
| parent | b85ea95d086471afb4ad062012a4d73cd328fa86 (diff) | |
PM / devfreq: Fix buffer overflow in trans_stat_show
Fix buffer overflow in trans_stat_show().
Convert simple snprintf to the more secure scnprintf with size of
PAGE_SIZE.
Add condition checking if we are exceeding PAGE_SIZE and exit early from
loop. Also add at the end a warning that we exceeded PAGE_SIZE and that
stats is disabled.
Return -EFBIG in the case where we don't have enough space to write the
full transition table.
Also document in the ABI that this function can return -EFBIG error.
Link: https://lore.kernel.org/all/20231024183016.14648-2-ansuelsmth@gmail.com/
Cc: stable@vger.kernel.org
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218041
Fixes: e552bbaf5b98 ("PM / devfreq: Add sysfs node for representing frequency transition information.")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'lib/cpumask.c')
0 files changed, 0 insertions, 0 deletions