If name is longer than allocated space NAMESIZE mac address is rewritten which show error message like:
Error message: Warning: Xlltemac.87000000 MAC addresses don't match: Address in SROM is 30:00:00:00:00:00 Address in environment is 00:0a:35:00:6a:04
NAMESIZE contains Driver name + zero terminated character.
Signed-off-by: Michal Simek monstr@monstr.eu
--- v2: Apply Mike Frysinger version --- net/eth.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/net/eth.c b/net/eth.c index a34fe59..c9b7e85 100644 --- a/net/eth.c +++ b/net/eth.c @@ -224,6 +224,14 @@ int eth_write_hwaddr(struct eth_device *dev, const char *base_name, int eth_register(struct eth_device *dev) { struct eth_device *d; + + size_t len = strlen(dev->name); + if (len >= NAMESIZE) { + printf("Network driver name is too long (%zu >= %zu): %s\n", + len, NAMESIZE, dev->name); + return -1; + } + if (!eth_devices) { eth_current = eth_devices = dev; eth_current_changed();