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CVE-2021-47186 In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup…

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

Affected products and versions

Product	Affected versions	Fixed in
Linux 5.16	earliest → < 5.16	5.16
Linux 5.15	earliest → < 5.15.5	5.15.5
Linux	5.10	5.10.82
linux_kernel 5.16	earliest → < 5.16	5.16
linux_kernel 5.15	earliest → < 5.15.5	5.15.5
linux_kernel 5.10	earliest → < 5.10.82	5.10.82
linux_kernel 1	1da177e4c3f4 → latest	9404c4145542