diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/filemap.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index bcdc393b6580..d7b10578a64b 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1982,16 +1982,26 @@ static int __remove_suid(struct dentry *dentry, int kill) int file_remove_suid(struct file *file) { struct dentry *dentry = file->f_path.dentry; - int killsuid = should_remove_suid(dentry); - int killpriv = security_inode_need_killpriv(dentry); + struct inode *inode = dentry->d_inode; + int killsuid; + int killpriv; int error = 0; + /* Fast path for nothing security related */ + if (IS_NOSEC(inode)) + return 0; + + killsuid = should_remove_suid(dentry); + killpriv = security_inode_need_killpriv(dentry); + if (killpriv < 0) return killpriv; if (killpriv) error = security_inode_killpriv(dentry); if (!error && killsuid) error = __remove_suid(dentry, killsuid); + if (!error) + inode->i_flags |= S_NOSEC; return error; } @@ -2327,7 +2337,7 @@ struct page *grab_cache_page_write_begin(struct address_space *mapping, repeat: page = find_lock_page(mapping, index); if (page) - return page; + goto found; page = __page_cache_alloc(mapping_gfp_mask(mapping) & ~gfp_notmask); if (!page) @@ -2340,6 +2350,8 @@ repeat: goto repeat; return NULL; } +found: + wait_on_page_writeback(page); return page; } EXPORT_SYMBOL(grab_cache_page_write_begin); |