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[S390] cio: fix wrong buffer access in cio_ignore_write 

Writing only spaces to /proc/cio_ignore will cause a buffer overflow
since the size_t value i will not become negative and so buf[-1UL] is
accessed. Change the value of i to ssize_t.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2009-03-26 15:24:16 +01:00 committed by Martin Schwidefsky
parent e909074bb9
commit 94cbc203be
1 changed files with 1 additions and 2 deletions
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3
drivers/s390/cio/blacklist.c
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@ -336,8 +336,7 @@ cio_ignore_write(struct file *file, const char __user *user_buf,
size_t user_len, loff_t *offset)
{
char *buf;
size_t i;
ssize_t rc, ret;
ssize_t rc, ret, i;
if (*offset)
return -EINVAL;