3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: majianpeng <majianpeng@xxxxxxxxx>
commit 2fbcbff1d6b9243ef71c64a8ab993bc3c7bb7af1 upstream.
Func ceph_calc_ceph_pg maybe failed.So add check for returned value.
Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
Reviewed-by: Sage Weil <sage@xxxxxxxxxxx>
Signed-off-by: Sage Weil <sage@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ceph/ioctl.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -211,8 +211,12 @@ static long ceph_ioctl_get_dataloc(struc
snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
ceph_ino(inode), dl.object_no);
- ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
- ceph_file_layout_pg_pool(ci->i_layout));
+ r = ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
+ ceph_file_layout_pg_pool(ci->i_layout));
+ if (r < 0) {
+ up_read(&osdc->map_sem);
+ return r;
+ }
dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
if (dl.osd >= 0) {
--
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