Description

In the Linux kernel, the following vulnerability has been resolved: s390/ctcm: Fix double-kfree The function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally from function 'ctcmpc_unpack_skb'. It frees passed mpcginfo. After that a call to function 'kfree' in function 'ctcmpc_unpack_skb' frees it again. Remove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'. Bug detected by the clang static analyzer.

References 8

• git.kernel.org https://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2
• git.kernel.org https://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472
• git.kernel.org https://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8
• git.kernel.org https://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a
• git.kernel.org https://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5
• git.kernel.org https://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c
• git.kernel.org https://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589
• git.kernel.org https://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2

Remediation