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udev: catch genuine_random_bytes() failures

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Fixes: CID#1428926
This commit is contained in:
Lennart Poettering 2020-05-28 23:26:16 +02:00
parent 70d8586365
commit a745117dba
1 changed files with 3 additions and 1 deletions
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4
src/udev/net/link-config.c
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@ -332,7 +332,9 @@ static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr
/* We require genuine randomness here, since we want to make sure we won't collide with other
* systems booting up at the very same time. We do allow RDRAND however, since this is not
* cryptographic key material. */
genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND);
r = genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND);
if (r < 0)
return log_device_error_errno(device, r, "Failed to acquire random data to generate MAC: %m");
} else {
uint64_t result;