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-rw-r--r--fs/fuse/dir.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 6f289fa9cc62..99f9948bf68b 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1474,6 +1474,14 @@ static int fuse_access(struct inode *inode, int mask)
BUG_ON(mask & MAY_NOT_BLOCK);
+ /*
+ * We should not send FUSE_ACCESS to the userspace
+ * when idmapped mounts are enabled as for this case
+ * we have fc->default_permissions = 1 and access
+ * permission checks are done on the kernel side.
+ */
+ WARN_ON_ONCE(!(fm->sb->s_iflags & SB_I_NOIDMAP));
+
if (fm->fc->no_access)
return 0;