remoteproc: avoid stack overflow in debugfs file
Recent gcc versions warn about reading from a negative offset of
an on-stack array:
drivers/remoteproc/remoteproc_debugfs.c: In function 'rproc_recovery_write':
drivers/remoteproc/remoteproc_debugfs.c:167:9: warning: 'buf[4294967295u]' may be used uninitialized in this function [-Wmaybe-uninitialized]
I don't see anything in sys_write() that prevents us from
being called with a zero 'count' argument, so we should
add an extra check in rproc_recovery_write() to prevent the
access and avoid the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 2e37abb89a
("remoteproc: create a 'recovery' debugfs entry")
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
This commit is contained in:
parent
1ec218373b
commit
92792e48e2
|
@ -156,7 +156,7 @@ rproc_recovery_write(struct file *filp, const char __user *user_buf,
|
||||||
char buf[10];
|
char buf[10];
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
if (count > sizeof(buf))
|
if (count < 1 || count > sizeof(buf))
|
||||||
return count;
|
return count;
|
||||||
|
|
||||||
ret = copy_from_user(buf, user_buf, count);
|
ret = copy_from_user(buf, user_buf, count);
|
||||||
|
|
Loading…
Reference in New Issue
Block a user