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| author | Dan Carpenter | 2015-06-04 10:59:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2015-06-08 22:09:41 +0200 |
| commit | 9ee81443b99ae3a022ba145ed62e22a5173e33f6 (patch) | |
| tree | a276e6067a34ed1939347c1b2e935806fe6e2051 /drivers/staging/wilc1000/wilc_debugfs.c | |
| parent | staging: wilc1000: Remove commented code lines (diff) | |
| download | kernel-qcow2-linux-9ee81443b99ae3a022ba145ed62e22a5173e33f6.tar.gz kernel-qcow2-linux-9ee81443b99ae3a022ba145ed62e22a5173e33f6.tar.xz kernel-qcow2-linux-9ee81443b99ae3a022ba145ed62e22a5173e33f6.zip | |
staging: wilc1000: prevent some overflows in debugfs
Add some limits here so we don't corrupt memory.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/wilc1000/wilc_debugfs.c')
| -rw-r--r-- | drivers/staging/wilc1000/wilc_debugfs.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c index 74b9fd5ba27b..c328208cda29 100644 --- a/drivers/staging/wilc1000/wilc_debugfs.c +++ b/drivers/staging/wilc1000/wilc_debugfs.c @@ -53,6 +53,9 @@ static ssize_t wilc_debug_level_write(struct file *filp, const char *buf, size_t char buffer[128] = {}; int flag = 0; + if (count > sizeof(buffer)) + return -EINVAL; + if (copy_from_user(buffer, buf, count)) { return -EFAULT; } @@ -99,6 +102,9 @@ static ssize_t wilc_debug_region_write(struct file *filp, const char *buf, size_ char buffer[128] = {}; int flag; + if (count > sizeof(buffer)) + return -EINVAL; + if (copy_from_user(buffer, buf, count)) { return -EFAULT; } |