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authorScott Mayhew <smayhew@redhat.com>2020-03-03 17:58:37 -0500
committerPaul Moore <paul@paul-moore.com>2020-03-30 19:56:50 -0400
commit779df6a5480f1307d51b66ea72352be592265cad (patch)
treedfd60cf3ed2d28daa3b251b6485e4e5385f3dd6f /.gitignore
parent27978872179b815105082902b22c516359576673 (diff)
NFS: Ensure security label is set for root inode
When using NFSv4.2, the security label for the root inode should be set via a call to nfs_setsecurity() during the mount process, otherwise the inode will appear as unlabeled for up to acdirmin seconds. Currently the label for the root inode is allocated, retrieved, and freed entirely witin nfs4_proc_get_root(). Add a field for the label to the nfs_fattr struct, and allocate & free the label in nfs_get_root(), where we also add a call to nfs_setsecurity(). Note that for the call to nfs_setsecurity() to succeed, it's necessary to also move the logic calling security_sb_{set,clone}_security() from nfs_get_tree_common() down into nfs_get_root()... otherwise the SBLABEL_MNT flag will not be set in the super_block's security flags and nfs_setsecurity() will silently fail. Reported-by: Richard Haines <richard_c_haines@btinternet.com> Signed-off-by: Scott Mayhew <smayhew@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Tested-by: Stephen Smalley <sds@tycho.nsa.gov> [PM: fixed 80-char line width problems] Signed-off-by: Paul Moore <paul@paul-moore.com>
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