2.6.11-mm4: drivers/scsi/arcmsr/arcmsr.c: enormous stack usage

[Adrian Bunk <bunk@stusta.de>]

On Wed, Mar 16, 2005 at 04:06:54AM -0800, Andrew Morton wrote:
>...
> Changes since 2.6.11-mm3:
>...
> +areca-raid-linux-scsi-driver.patch
> 
>  Updated version of this driver.
>...

<--  snip  -->

...
static int arcmsr_iop_ioctlcmd(PACB pACB, int ioctl_cmd, void *arg)
{
...
uint8_t tmpQbuffer[1032];
...
uint8_t tmpuserbuffer[1032];
...
}
...

<--  snip  -->


1kB allocations from the stack aren't a good idea considering that you 
might have only a 4kB stack altogether.


Running "make checkstack" after compiling the kernel helps you finding 
such problems.


cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed