From: Luis Henriques <lhenriques@suse.com>
Date: Fri, 28 Jul 2017 11:56:40 +0100
Subject: ceph: check negative offsets in ceph_llseek()
Git-commit: 397f238994a5dae1b10e8a6efe9a2e2a95052cee
Patch-mainline: v4.14-rc1
References: FATE#324714
When a user requests SEEK_HOLE or SEEK_DATA with a negative offset
ceph_llseek should return -ENXIO. Currently -EINVAL is being returned for
SEEK_DATA and 0 for SEEK_HOLE.
Signed-off-by: Luis Henriques <lhenriques@suse.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
fs/ceph/file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 2eb43a54e2d6..9634eb79b041 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1481,13 +1481,13 @@ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence)
offset += file->f_pos;
break;
case SEEK_DATA:
- if (offset >= i_size) {
+ if (offset < 0 || offset >= i_size) {
ret = -ENXIO;
goto out;
}
break;
case SEEK_HOLE:
- if (offset >= i_size) {
+ if (offset < 0 || offset >= i_size) {
ret = -ENXIO;
goto out;
}