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Commit 94cbc203 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
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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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent e909074b

drivers/s390/cio/blacklist.c

+1 −2
Original line number Diff line number Diff line
@@ -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;