From 4a80b29d91bc7a598a7d65b2500493a9fc3cb322 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Fri, 31 Mar 2006 15:37:06 -0800 Subject: [PATCH] sysfs: zero terminate sysfs write buffers (CVE-2006-1055) No one should be writing a PAGE_SIZE worth of data to a normal sysfs file, so properly terminate the buffer. Thanks to Al Viro for pointing out my stupidity here. CVE-2006-1055 has been assigned for this. Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/sysfs') diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index d0e3d8495165..2ecc58cc368a 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -183,7 +183,7 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t return -ENOMEM; if (count >= PAGE_SIZE) - count = PAGE_SIZE; + count = PAGE_SIZE - 1; error = copy_from_user(buffer->page,buf,count); buffer->needs_read_fill = 1; return error ? -EFAULT : count; -- cgit v1.2.3