[lkml]   [2018]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v5 4/4] printk: Give error on attempt to set log buffer length to over 4G

On 2018年10月08日 21:59, Petr Mladek wrote:
> I tried this patch with log_buf_len=5G. The kernel did not crash
> but dmesg shown some mess. There are several 32-bit variables
> to store the size, for example:
> static u32 log_buf_len = __LOG_BUF_LEN;
> u32 log_buf_len_get(void)
> static u32 log_first_idx;
> static u32 log_next_idx;
> I guess that the code somewhere does not detect an overflows
> correctly.
> I am not motivated enought to add support for such huge message
> buffer. Therefore I suggest to limit it to 32G for now.

I'm also fine with this suggestion. Thanks.


 \ /
  Last update: 2018-10-08 18:31    [W:0.086 / U:5.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site