2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter <dan.carpenter@xxxxxxxxxx> If we do a zero size allocation then it will oops. Also we can't be sure the user passes us a NUL terminated string so I've added a terminator. This code can only be triggered by root. Reported-by: Nico Golde <nico@xxxxxxxxx> Reported-by: Fabian Yamaguchi <fabs@xxxxxxxxx> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Acked-by: Dan Williams <dcbw@xxxxxxxxxx> Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> (cherry picked from commit a497e47d4aec37aaf8f13509f3ef3d1f6a717d88) Signed-off-by: Willy Tarreau <w@xxxxxx> --- drivers/net/wireless/libertas/debugfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c index 893a55c..89532a6 100644 --- a/drivers/net/wireless/libertas/debugfs.c +++ b/drivers/net/wireless/libertas/debugfs.c @@ -925,7 +925,10 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, char *p2; struct debug_data *d = (struct debug_data *)f->private_data; - pdata = kmalloc(cnt, GFP_KERNEL); + if (cnt == 0) + return 0; + + pdata = kmalloc(cnt + 1, GFP_KERNEL); if (pdata == NULL) return 0; @@ -934,6 +937,7 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, kfree(pdata); return 0; } + pdata[cnt] = '\0'; p0 = pdata; for (i = 0; i < num_of_items; i++) { -- 1.7.12.2.21.g234cd45.dirty -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html