Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid Fixes a crash when layout is null during this call stack: write_inode -> nfs4_write_inode -> pnfs_layoutcommit_inode pnfs_set_layoutcommit relies on the lseg refcount to keep the layout around. Need to clear NFS_INO_LAYOUTCOMMIT otherwise we might attempt to reference a null layout.

References 8

• git.kernel.org https://git.kernel.org/stable/c/084bebe82ad86f718a3af84f34761863e63164ed
• git.kernel.org https://git.kernel.org/stable/c/104080582ae0aa6dce6c6d75ff89062efe84673b
• git.kernel.org https://git.kernel.org/stable/c/38694f9aae00459ab443a7dc8b3949a6b33b560a
• git.kernel.org https://git.kernel.org/stable/c/59947dff0fb7c19c09ce6dccbcd253fd542b6c25
• git.kernel.org https://git.kernel.org/stable/c/b6e4e3a08c03200cc4b8067ec8ab3172a989d6fc
• git.kernel.org https://git.kernel.org/stable/c/ca2e7fdad7c683b64821c94a58b9b68733214dad
• git.kernel.org https://git.kernel.org/stable/c/e0f8058f2cb56de0b7572f51cd563ca5debce746
• git.kernel.org https://git.kernel.org/stable/c/f718f9ea6094843b8c059b073af49ad61e9f49bb

Remediation