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do_dentry_open(): close the race with mark_files_ro() in failure exit 

we want to take it out of mark_files_ro() reach *before* we start
checking if we ought to drop write access.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-23 22:49:45 +04:00
parent 85d7d618c1
commit c3c4f69424
1 changed files with 1 additions and 1 deletions
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2
fs/open.c
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@ -727,6 +727,7 @@ static int do_dentry_open(struct file *f,
cleanup_all: cleanup_all:
fops_put(f->f_op); fops_put(f->f_op);
file_sb_list_del(f);
if (f->f_mode & FMODE_WRITE) { if (f->f_mode & FMODE_WRITE) {
put_write_access(inode); put_write_access(inode);
if (!special_file(inode->i_mode)) { if (!special_file(inode->i_mode)) {
@ -740,7 +741,6 @@ cleanup_all:
mnt_drop_write(f->f_path.mnt); mnt_drop_write(f->f_path.mnt);
} }
} }
file_sb_list_del(f);
cleanup_file: cleanup_file:
path_put(&f->f_path); path_put(&f->f_path);
f->f_path.mnt = NULL; f->f_path.mnt = NULL;