From aada54f9800497cc8249c99ffcb1431c6d8e98e7 Mon Sep 17 00:00:00 2001 From: Ross Zwisler Date: Tue, 8 Nov 2016 11:32:00 +1100 Subject: [PATCH] dax: remove the last BUG_ON() from fs/dax.c Don't take down the kernel if we get an invalid 'from' and 'length' argument pair. Just warn once and return an error. Signed-off-by: Ross Zwisler Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Dave Chinner --- fs/dax.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index e52e7543c351..219fa2bd676a 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1194,7 +1194,8 @@ int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length, /* Block boundary? Nothing to do */ if (!length) return 0; - BUG_ON((offset + length) > PAGE_SIZE); + if (WARN_ON_ONCE((offset + length) > PAGE_SIZE)) + return -EINVAL; memset(&bh, 0, sizeof(bh)); bh.b_bdev = inode->i_sb->s_bdev; -- 2.20.1