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Change History

CISA-ADP AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA-ADP CWE-476

In the Linux kernel, the following vulnerability has been resolved:

icmp: prevent possible NULL dereferences from icmp_build_probe()

First problem is a double call to __in_dev_get_rcu(), because
the second one could return NULL.

if (__in_dev_get_rcu(dev) && __in_dev_get_rcu(dev)->ifa_list)

Second problem is a read from dev->ip6_ptr with no NULL check:

if (!list_empty(&rcu_dereference(dev->ip6_ptr)->addr_list))

Use the correct RCU API to fix these.

v2: add missing include <net/addrconf.h>

kernel.org https://git.kernel.org/stable/c/23b7ee4a8d559bf38eac7ce5bb2f6ebf76f9c401 [No types assigned]

kernel.org https://git.kernel.org/stable/c/3e2979bf080c40da4f7c93aff8575ab8bc62b767 [No types assigned]

kernel.org https://git.kernel.org/stable/c/599c9ad5e1d43f5c12d869f5fd406ba5d8c55270 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c58e88d49097bd12dfcfef4f075b43f5d5830941 [No types assigned]

kernel.org https://git.kernel.org/stable/c/d68dc711d84fdcf698e5d45308c3ddeede586350 [No types assigned]