[PATCH v5 07/17] dax: remove the last BUG_ON() from fs/dax.c
From: Ross Zwisler <hidden>
Date: 2016-10-07 21:08:54
Also in:
linux-ext4, linux-fsdevel, linux-xfs, lkml, nvdimm
Subsystem:
filesystem direct access (dax), filesystems (vfs and infrastructure), the rest · Maintainers:
Dan Williams, Alexander Viro, Christian Brauner, Linus Torvalds
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 <redacted> --- fs/dax.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/dax.c b/fs/dax.c
index ac28cdf..98189ac 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;
--
2.7.4
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