ANDROID: fuse-bpf: Add NULL pointer check in fuse_release_in

If open request sent to classic fuse, backing_file is null. In fuse_release_initialize, fput will trigger a crash. Bug: 297831741 Signed-off-by: liujing40 <[email protected]> (cherry picked from https://android-review.googlesource.com/q/commit:4d2ff573981f06ba09e1ddda8726bb73ff6a2c3f) Merged-In: I2d54d99d62b54c39a6dc9064f8f62488433aff6f Change-Id: I2d54d99d62b54c39a6dc9064f8f62488433aff6f
PQEnablers-Devices · Jun 22, 2024 · 89cf325 · 89cf325
1 parent 29f7311
commit 89cf325
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/fs/fuse/backing.c b/fs/fuse/backing.c
@@ -353,7 +353,9 @@ int fuse_release_initialize(struct fuse_bpf_args *fa, struct fuse_release_in *fr
 			    struct inode *inode, struct fuse_file *ff)
 {
 	/* Always put backing file whatever bpf/userspace says */
-	fput(ff->backing_file);
+	if (ff->backing_file) {
+	    fput(ff->backing_file);
+	}
 
 	*fri = (struct fuse_release_in) {
 		.fh = ff->fh,