tree 02e2f942ee44e5a49efdfff22d41fb1fee382e45
parent 6b21e1b77d1a3d58ebfd513264c885695e8a0ba5
author Chen Gang <gang.chen@asianux.com> 1368745984 +0000
committer David S. Miller <davem@davemloft.net> 1369001447 -0700

net: irda: using kzalloc() instead of kmalloc() to avoid strncpy() issue.

'discovery->data.info' length is 22, NICKNAME_MAX_LEN is 21, so the
strncpy() will always left the last byte of 'discovery->data.info'
uninitialized.

When 'text' length is longer than 21 (NICKNAME_MAX_LEN), if still left
the last byte of 'discovery->data.info' uninitialized, the next
strlen() will cause issue.

Also 'discovery->data' is 'struct irda_device_info' which defined in
"include/uapi/...", it may copy to user mode, so need whole initialized.

All together, need use kzalloc() instead of kmalloc() to initialize all
members firstly.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>