From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: He Zhe <zhe.he@windriver.com>
Cc: Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
sergey.senozhatsky@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] printk: Fix panic caused by passing log_buf_len to command line
Date: Tue, 25 Sep 2018 21:16:04 +0900 [thread overview]
Message-ID: <20180925121604.GC523@tigerII.localdomain> (raw)
In-Reply-To: <02b53bc1-3803-50b1-d07e-a7962f9e5688@windriver.com>
On (09/22/18 23:36), He Zhe wrote:
> I'd like to fix the above issues. But can I have your opinions about how to
> handle the syscall?
Hmm. This part is complex, I need to look at it more.
A signed int is a good buffer size limit for 32-bit user space.
But this also means that syslog might experience some problems
doing SYSLOG_ACTION_READ_ALL on a 32-bit system with a 4G log_buf.
Not to mention SYSLOG_ACTION_READ_ALL on a 64-bit system with a
log_buf=32G. So *maybe* things are alredy a bit broken in this
department. Dunno, need to think more.
-ss
next prev parent reply other threads:[~2018-09-25 12:16 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 17:17 [PATCH v2 1/2] printk: Fix panic caused by passing log_buf_len to command line zhe.he
2018-09-18 17:17 ` [PATCH v2 2/2] printk: Add KBUILD_MODNAME and correct bare use of unsigned zhe.he
2018-09-19 2:06 ` Sergey Senozhatsky
2018-09-19 11:20 ` Petr Mladek
2018-09-19 1:50 ` [PATCH v2 1/2] printk: Fix panic caused by passing log_buf_len to command line Sergey Senozhatsky
2018-09-19 2:27 ` He Zhe
2018-09-19 2:39 ` Sergey Senozhatsky
2018-09-19 2:43 ` Steven Rostedt
2018-09-19 2:47 ` Sergey Senozhatsky
2018-09-19 3:05 ` Steven Rostedt
2018-09-20 16:16 ` He Zhe
2018-09-20 16:30 ` Steven Rostedt
2018-09-21 7:37 ` Petr Mladek
2018-09-22 15:36 ` He Zhe
2018-09-25 12:16 ` Sergey Senozhatsky [this message]
2018-09-25 12:01 ` Sergey Senozhatsky
2018-09-25 12:23 ` Petr Mladek
2018-09-25 12:37 ` Sergey Senozhatsky
2018-09-25 13:31 ` Sergey Senozhatsky
2018-09-25 15:31 ` He Zhe
2018-09-26 11:05 ` Petr Mladek
2018-09-28 7:35 ` Sergey Senozhatsky
2018-09-28 8:22 ` He Zhe
2018-09-19 6:44 ` Sergey Senozhatsky
2018-09-19 10:09 ` He Zhe
2018-09-19 18:58 ` Sasha Levin
2018-09-22 14:45 ` He Zhe
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