From 2d04df8116426b6c7b9f8b9b371250f666a2a2fb Mon Sep 17 00:00:00 2001 From: Edward Adam Davis Date: Wed, 4 Jun 2025 14:48:43 +0800 Subject: [PATCH] jfs: Regular file corruption check The reproducer builds a corrupted file on disk with a negative i_size value. Add a check when opening this file to avoid subsequent operation failures. Reported-by: syzbot+630f6d40b3ccabc8e96e@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=630f6d40b3ccabc8e96e Tested-by: syzbot+630f6d40b3ccabc8e96e@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Signed-off-by: Dave Kleikamp --- fs/jfs/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/jfs/file.c b/fs/jfs/file.c index 01b6912e60f80..742cadd1f37e8 100644 --- a/fs/jfs/file.c +++ b/fs/jfs/file.c @@ -44,6 +44,9 @@ static int jfs_open(struct inode *inode, struct file *file) { int rc; + if (S_ISREG(inode->i_mode) && inode->i_size < 0) + return -EIO; + if ((rc = dquot_file_open(inode, file))) return rc; -- 2.47.2