Soft lockup in xfrm_policy_flush().
If an error occurred during execution of xfrm_net_init() when a new network namespace was created, xfrm_policy_lock could remain uninitialized. As a result, soft lockup could happen in xfrm_policy_flush() if it tried to acquire the lock after that.
ploop: kernel crash in dio_open().
It was found that the implementation of ploop did not handle errors reported by kthread_create() properly. This could lead to a kernel crash in dio_open().
Containers with NFS mounts failed to migrate: CRIU complained about nfs/clntX files.
It was discovered that a container with NFS mounts could keep the files /var/lib/nfs/rpc_pipefs/nfs/clntX open, even if no NFS server was running there. As a result, CRIU reported errors when the users tried to migrate the container.
File systems: insufficient error handling in sget() could lead to excessive memory consumption.
sunrpc: potential kernel crash (use after free) in svc_process_common().
Potential out-of-bounds read in fuse_dev_splice_write().
Processes could get stuck in an unkillable state when using large FUSE KIO messages.
It was found that rpc_get_hdr() function from 'fuse_kio_pcs' module did not return valid values in 'msg_size' in some cases. As a result, the processes using large FUSE KIO messages could get stuck in an unkillable state.