[PATCH 5.4 001/240] 9p: missing chunk of "fs/9p: Dont update file type when updating file attributes"

Greg Kroah-Hartman
2022-06-20T13:29:58Z

From: Al Viro <viro@zeniv.linux.org.uk>

commit b577d0cd2104fdfcf0ded3707540a12be8ddd8b0 upstream.

In commit 45089142b149 Aneesh had missed one (admittedly, very unlikely
to hit) case in v9fs_stat2inode_dotl(). However, the same considerations
apply there as well - we have no business whatsoever to change ->i_rdev
or the file type.

Cc: Tadeusz Struk <tadeusz.struk@linaro.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/9p/vfs_inode_dotl.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -641,14 +641,10 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl
if (stat->st_result_mask & P9_STATS_NLINK)
set_nlink(inode, stat->st_nlink);
if (stat->st_result_mask & P9_STATS_MODE) {
- inode->i_mode = stat->st_mode;
- if ((S_ISBLK(inode->i_mode)) ||
- (S_ISCHR(inode->i_mode)))
- init_special_inode(inode, inode->i_mode,
- inode->i_rdev);
+ mode = stat->st_mode & S_IALLUGO;
+ mode |= inode->i_mode & ~S_IALLUGO;
+ inode->i_mode = mode;
}
- if (stat->st_result_mask & P9_STATS_RDEV)
- inode->i_rdev = new_decode_dev(stat->st_rdev);
if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
stat->st_result_mask & P9_STATS_SIZE)
v9fs_i_size_write(inode, stat->st_size);