iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Revert "NFSv4: Handle the special Linux file open access mode"

Browse Source 
[ Upstream commit ab0fc21bc7 ]

This reverts commit 44942b4e45.

After secondly opening a file with O_ACCMODE|O_DIRECT flags,
nfs4_valid_open_stateid() will dereference NULL nfs4_state when lseek().

Reproducer:
  1. mount -t nfs -o vers=4.2 $server_ip:/ /mnt/
  2. fd = open("/mnt/file", O_ACCMODE|O_DIRECT|O_CREAT)
  3. close(fd)
  4. fd = open("/mnt/file", O_ACCMODE|O_DIRECT)
  5. lseek(fd)

Reported-by: Lyu Tao <tao.lyu@epfl.ch>
Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
ChenXiaoSong
2022-03-29 19:32:07 +08:00
committed by Greg Kroah-Hartman
parent cf580d2e38
commit c688705a39
2 changed files with 1 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
fs/nfs/inode.c
View File

@ -1139,7 +1139,6 @@ int nfs_open(struct inode *inode, struct file *filp)
nfs_fscache_open_file(inode, filp);
return 0;
}
EXPORT_SYMBOL_GPL(nfs_open);
/*
* This function is called whenever some part of NFS notices that