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ovl: set lower layer st_dev only if setting lower st_ino 

For broken hardlinks, we do not return lower st_ino, so we should
also not return lower pseudo st_dev.

Fixes: a0c5ad307a ("ovl: relax same fs constraint for constant st_ino")
Cc: <stable@vger.kernel.org> #v4.15
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein 2018-04-11 20:09:29 +03:00 committed by Miklos Szeredi
parent 3ec9b3fafc
commit 9f99e50d46
1 changed files with 2 additions and 5 deletions
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7
fs/overlayfs/inode.c
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@ -118,13 +118,10 @@ int ovl_getattr(const struct path *path, struct kstat *stat,
*/
if (ovl_test_flag(OVL_INDEX, d_inode(dentry)) ||
(!ovl_verify_lower(dentry->d_sb) &&
(is_dir || lowerstat.nlink == 1)))
(is_dir || lowerstat.nlink == 1))) {
stat->ino = lowerstat.ino;
if (samefs)
WARN_ON_ONCE(stat->dev != lowerstat.dev);
else
stat->dev = ovl_get_pseudo_dev(dentry);
}
}
if (samefs) {
/*