linux-kernel - Re: [syzbot] Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick

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Message-ID: <0000000000004b4ac4061ea8e39c@google.com>
Date: Thu, 01 Aug 2024 18:02:56 -0700
From: syzbot <syzbot+24ac24ff58dc5b0d26b9@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick_link

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Subject: Re: [syzbot] [squashfs?] KMSAN: uninit-value in pick_link
Author: lizhi.xu@...driver.com

why folio not inited?

#syz test: upstream 2f8c4f506285

diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index 16bd693d0b3a..3c667939f1d7 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -394,6 +394,11 @@ int squashfs_read_inode(struct inode *inode, long long ino)
 		return -EINVAL;
 	}
 
+	if ((int)inode->i_size < 0) {
+		ERROR("Wrong i_size %d!\n", inode->i_size);
+		return -EINVAL;
+	}
+
 	if (xattr_id != SQUASHFS_INVALID_XATTR && msblk->xattr_id_table) {
 		err = squashfs_xattr_lookup(sb, xattr_id,
 					&squashfs_i(inode)->xattr_count,