From 4b33a1916a351ba3bf5af42fb38a988a5dce11bf Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Tue, 19 Sep 2023 22:26:18 -0400 Subject: [PATCH] bcachefs: bch2_ioctl_disk_resize_journal(): check for integer truncation Reported-by: Dan Carpenter Signed-off-by: Kent Overstreet --- fs/bcachefs/chardev.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/bcachefs/chardev.c b/fs/bcachefs/chardev.c index 51d671267741..e8b6733e7f71 100644 --- a/fs/bcachefs/chardev.c +++ b/fs/bcachefs/chardev.c @@ -627,6 +627,9 @@ static long bch2_ioctl_disk_resize_journal(struct bch_fs *c, arg.pad) return -EINVAL; + if (arg.nbuckets > U32_MAX) + return -EINVAL; + ca = bch2_device_lookup(c, arg.dev, arg.flags); if (IS_ERR(ca)) return PTR_ERR(ca); -- 2.25.1