KernelSU: throne_tracker: avoid incfs dirs

upstream's way seems to fail around my_actor, once it
tries to resolve path to struct via kern_path.

no idea what the issue is, but since we can achieve the
same goal, ehh, dont bother with it

Replaces:
`throne_tracker: avoid cross fs access`
tiann/KernelSU#2626

Signed-off-by: backslashxx <[email protected]>

Author: backslashxx

drivers/kernelsu/throne_tracker.c

@@ -271,7 +271,17 @@ void search_manager(const char *path, int depth, struct list_head *uid_data)
 					pr_err("Failed to open directory: %s, err: %ld\n", pos->dirpath, PTR_ERR(file));
 					goto skip_iterate;
 				}
-
+				
+				#define INCFS_MAGIC_NUMBER (unsigned long)(0x5346434e49ul) // incrementalfs.h
+				if (file->f_inode->i_sb->s_magic && file->f_inode->i_sb->s_magic == INCFS_MAGIC_NUMBER) {
+					pr_info("%s: skip incfs: %s\n", pos->dirpath);
+					filp_close(file, NULL);
+					goto skip_iterate;
+				}
+#ifdef CONFIG_KSU_DEBUG				
+				if (file->f_inode->i_sb->s_magic)
+					pr_info("%s: magic: %lx current dir: %s\n", __func__, file->f_inode->i_sb->s_magic, pos->dirpath);
+#endif
 				iterate_dir(file, &ctx.ctx);
 				filp_close(file, NULL);
 			}