Re: bug in kernel/sysctl.c (SYSIPC) ?

[Der Herr Hofrat <der.herr@hofr.at>]

> On Tue, 18 Mar 2003 08:51:17 +0100 (CET) Der Herr Hofrat <der.herr@hofr.at> wrote:
> 
> |  atleast in kernel 2.4.19 and 2.4.20 in kernel/sysctl.c shmmax and shmall use
> |  the proc_dointvec_minmax callback without passing a min/max value - is there
> |  a reson for this or is this a simple bug ?
> | 
> | linux/kenrel/sysctl.c (line 221 for 2.4.19/20)
> | 
> | #ifdef CONFIG_SYSVIPC
> | 	{KERN_SHMMAX, "shmmax", &shm_ctlmax, sizeof (size_t),
> | 	 0644, NULL, &proc_doulongvec_minmax},
> | 	{KERN_SHMALL, "shmall", &shm_ctlall, sizeof (size_t),
> | 	 0644, NULL, &proc_doulongvec_minmax},
> | 	...
> | #endif
> 
> The min and max values default to 0 if not specified (initialized),
> and the _minmax functions have code to handle those cases.
> 
> so as long as the intended min/max values were 0, I don't see a
> problem.  Are you seeing a problem?
>

not directly a problem - my assumption was that shmmax would be bounded in some
way - currently you can write any value into /proc/sys/kernel/shmmax - and I
don't think that the inteded behavior of this is to permit any value - or if 
it is - what is the point of using the _minimax and not simple proc_doulongvec ?

hofrat