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authorRichard Guy Briggs <rgb@redhat.com>2019-01-23 13:35:00 -0500
committerPaul Moore <paul@paul-moore.com>2019-01-30 20:51:47 -0500
commit57d4657716aca81ef4d7ec23e8123d26e3d28954 (patch)
tree61af3d955d7a01767f7d1e6ede67ca6096cc8a07 /fs/namespace.c
parent05c7a9cb2727cd3c3d8e767f48e5cd18486a8d16 (diff)
downloadlinux-57d4657716aca81ef4d7ec23e8123d26e3d28954.tar.bz2
audit: ignore fcaps on umount
Don't fetch fcaps when umount2 is called to avoid a process hang while it waits for the missing resource to (possibly never) re-appear. Note the comment above user_path_mountpoint_at(): * A umount is a special case for path walking. We're not actually interested * in the inode in this situation, and ESTALE errors can be a problem. We * simply want track down the dentry and vfsmount attached at the mountpoint * and avoid revalidating the last component. This can happen on ceph, cifs, 9p, lustre, fuse (gluster) or NFS. Please see the github issue tracker https://github.com/linux-audit/audit-kernel/issues/100 Signed-off-by: Richard Guy Briggs <rgb@redhat.com> [PM: merge fuzz in audit_log_fcaps()] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'fs/namespace.c')
-rw-r--r--fs/namespace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index a677b59efd74..e5de0e372df2 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1640,6 +1640,8 @@ int ksys_umount(char __user *name, int flags)
if (!(flags & UMOUNT_NOFOLLOW))
lookup_flags |= LOOKUP_FOLLOW;
+ lookup_flags |= LOOKUP_NO_EVAL;
+
retval = user_path_mountpoint_at(AT_FDCWD, name, lookup_flags, &path);
if (retval)
goto out;