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