Kernel stack corruption

vgo@Ratio.de
Thu, 04 Feb 1999 18:10:57 +0100 (MET)

I'm writeing a driver for connecting a A0 plotter.
The data I want to plot I write to the device through ioctl() commands.
Every time the transfer has completed I get
'release: plot kernel stack corruption. Aiee'
The ioctl call I added to a library wich contains

#define KIP5_IOCSETSBTSIZE _IO( KIP5_IOC_MAGIC, 1 )
#define KIP5_IOCSETSBTCODE _IOW( KIP5_IOC_MAGIC, 2,sizeof(PUCHAR) )

#define KIP5_IOCPLOT _IOWR( KIP5_IOC_MAGIC, 21, sizeof( TKip5KernelPacket ) )

int MyPlot( int fd, TKip5KernelPacket *p )
{
p->IO.Input.FunctionCode = KIP5_IOCPLOT;
return ioctl( fd, p->IO.Input.FunctionCode, p );
};

the same happens with KIP5_IOCSETSBTCODE functions.
Only calls like KIP5_IOCSETSBTSIZE where READ and WRITE flags are not set
returns without problems.

Can anyone tell me why this happens?

please CC to vgo@ratio.de

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E-Mail: vgo@Ratio.de
Date: 04-Feb-99
Time: 17:36:36

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