This is a note to let you know that I've just added the patch titled
erofs: add unsupported inode i_format check
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
erofs-add-unsupported-inode-i_format-check.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 Mon Sep 17 00:00:00 2001
From: Gao Xiang <hsiangkao@xxxxxxxxxx>
Date: Mon, 29 Mar 2021 08:36:14 +0800
Subject: erofs: add unsupported inode i_format check
From: Gao Xiang <hsiangkao@xxxxxxxxxx>
commit 24a806d849c0b0c1d0cd6a6b93ba4ae4c0ec9f08 upstream.
If any unknown i_format fields are set (may be of some new incompat
inode features), mark such inode as unsupported.
Just in case of any new incompat i_format fields added in the future.
Link: https://lore.kernel.org/r/20210329003614.6583-1-hsiangkao@xxxxxxx
Fixes: 431339ba9042 ("staging: erofs: add inode operations")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.19+
Signed-off-by: Gao Xiang <hsiangkao@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/erofs/erofs_fs.h | 3 +++
drivers/staging/erofs/inode.c | 6 ++++++
2 files changed, 9 insertions(+)
--- a/drivers/staging/erofs/erofs_fs.h
+++ b/drivers/staging/erofs/erofs_fs.h
@@ -71,6 +71,9 @@ enum {
#define EROFS_I_VERSION_BIT 0
__EROFS_BIT(EROFS_I_, DATA_MAPPING, VERSION);
+#define EROFS_I_ALL \
+ ((1 << (EROFS_I_DATA_MAPPING_BIT + EROFS_I_DATA_MAPPING_BITS)) - 1)
+
struct erofs_inode_v1 {
/* 0 */__le16 i_advise;
--- a/drivers/staging/erofs/inode.c
+++ b/drivers/staging/erofs/inode.c
@@ -48,6 +48,12 @@ static struct page *read_inode(struct in
v1 = page_address(page) + *ofs;
ifmt = le16_to_cpu(v1->i_advise);
+ if (ifmt & ~EROFS_I_ALL) {
+ errln("unsupported i_format %u of nid %llu", ifmt, vi->nid);
+ err = -EOPNOTSUPP;
+ goto err_out;
+ }
+
vi->data_mapping_mode = __inode_data_mapping(ifmt);
if (unlikely(vi->data_mapping_mode >= EROFS_INODE_LAYOUT_MAX)) {
errln("unknown data mapping mode %u of nid %llu",
Patches currently in stable-queue which might be from hsiangkao@xxxxxxxxxx are
queue-4.19/erofs-add-unsupported-inode-i_format-check.patch
