diff options
| author | Tejun Heo <tj@kernel.org> | 2015-05-14 11:36:36 -0400 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:49:11 +0900 |
| commit | a1c3d4a366a3c5f085a4d049682b170393f7bd9e (patch) | |
| tree | ea1f624bfec4dbd566b0ae379a9d33fce5f0437b /include/linux | |
| parent | 6a436d340c498403c1f8643571c091ac96727f60 (diff) | |
printk: guard the amount written per line by devkmsg_read()
devkmsg_read() uses 8k buffer and assumes that the formatted output
message won't overrun which seems safe given LOG_LINE_MAX, the current
use of dict and the escaping method being used; however, we're
planning to use devkmsg formatting wider and accounting for the buffer
size properly isn't that complicated.
This patch defines CONSOLE_EXT_LOG_MAX as 8192 and updates
devkmsg_read() so that it limits output accordingly.
Change-Id: Ic8579ddcd55294a38561e9e8b28449c067600db1
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Petr Mladek <pmladek@suse.cz>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/printk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index 9b30871c9149..58b1fec40d37 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -30,6 +30,8 @@ static inline const char *printk_skip_level(const char *buffer) return buffer; } +#define CONSOLE_EXT_LOG_MAX 8192 + /* printk's without a loglevel use this.. */ #define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT |