UBI: Fix crash in try_recover_peb()

    drivers/mtd/ubi/eba.c: In function ‘try_recover_peb’:
    drivers/mtd/ubi/eba.c:744: warning: ‘vid_hdr’ is used uninitialized in this function

The pointer vid_hdr is indeed not initialized, leading to a crash when
it is dereferenced.

Fix this by obtaining the pointer from the VID buffer, like is done
everywhere else.

Fixes: 3291b52f9ff0acc8 ("UBI: introduce the VID buffer concept")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 95c4048a371e87b6f5517b01109b19db85cedc56..388e46be6ad92805f2a6633da6960d8c56b1b837 100644 (file)
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -741,6 +741,7 @@ static int try_recover_peb(struct ubi_volume *vol, int pnum, int lnum,
                goto out_put;
        }
 
+       vid_hdr = ubi_get_vid_hdr(vidb);
        ubi_assert(vid_hdr->vol_type == UBI_VID_DYNAMIC);
 
        mutex_lock(&ubi->buf_mutex);