diff options
author | Miklos Szeredi <mszeredi@redhat.com> | 2021-08-17 21:05:16 +0200 |
---|---|---|
committer | Miklos Szeredi <mszeredi@redhat.com> | 2021-08-17 21:05:16 +0200 |
commit | 76224355db7570cbe6b6f75c8929a1558828dd55 (patch) | |
tree | 5fe1da76e6516a442bfb45907eb4e5dbbf43d03f /Documentation/features/arch-support.txt | |
parent | 5d5b74aa9c766f0dd37d5cc1a2a7a94586130501 (diff) | |
download | linux-76224355db7570cbe6b6f75c8929a1558828dd55.tar.bz2 |
fuse: truncate pagecache on atomic_o_trunc
fuse_finish_open() will be called with FUSE_NOWRITE in case of atomic
O_TRUNC. This can deadlock with fuse_wait_on_page_writeback() in
fuse_launder_page() triggered by invalidate_inode_pages2().
Fix by replacing invalidate_inode_pages2() in fuse_finish_open() with a
truncate_pagecache() call. This makes sense regardless of FOPEN_KEEP_CACHE
or fc->writeback cache, so do it unconditionally.
Reported-by: Xie Yongji <xieyongji@bytedance.com>
Reported-and-tested-by: syzbot+bea44a5189836d956894@syzkaller.appspotmail.com
Fixes: e4648309b85a ("fuse: truncate pending writes on O_TRUNC")
Cc: <stable@vger.kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'Documentation/features/arch-support.txt')
0 files changed, 0 insertions, 0 deletions