From: H.J. Lu Date: Fri, 18 May 2012 14:12:47 +0000 (-0700) Subject: Check d_ino/d_off before using getdents syscall X-Git-Tag: upstream/2.30~10883 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7cd195df6204a8575b3b1d303affb9aa5756a828;p=external%2Fglibc.git Check d_ino/d_off before using getdents syscall --- diff --git a/ChangeLog b/ChangeLog index f59b01a..15a012f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2012-05-18 H.J. Lu + * sysdeps/unix/sysv/linux/getdents.c (__GETDENTS): Use + getdents system call only if kernel and user dirents have the + same d_ino and d_off. + * stdio-common/_itoa.c: Check _ITOA_NEEDED instead of LLONG_MAX != LONG_MAX. (_itoa_word): Use _ITOA_WORD_TYPE on value. diff --git a/sysdeps/unix/sysv/linux/getdents.c b/sysdeps/unix/sysv/linux/getdents.c index eb9cfef..ac4979e 100644 --- a/sysdeps/unix/sysv/linux/getdents.c +++ b/sysdeps/unix/sysv/linux/getdents.c @@ -1,5 +1,4 @@ -/* Copyright (C) 1993, 1995-2004, 2006, 2007, 2010 - Free Software Foundation, Inc. +/* Copyright (C) 19932-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -99,7 +98,17 @@ __GETDENTS (int fd, char *buf, size_t nbytes) ssize_t retval; #ifdef __ASSUME_GETDENTS32_D_TYPE - if (sizeof (DIRENT_TYPE) == sizeof (struct dirent)) + /* The d_ino and d_off fields in kernel_dirent and dirent must have + the same sizes and alignments. */ + if (sizeof (DIRENT_TYPE) == sizeof (struct dirent) + && (sizeof (((struct kernel_dirent *) 0)->d_ino) + == sizeof (((struct dirent *) 0)->d_ino)) + && (sizeof (((struct kernel_dirent *) 0)->d_off) + == sizeof (((struct dirent *) 0)->d_off)) + && (offsetof (struct kernel_dirent, d_off) + == offsetof (struct dirent, d_off)) + && (offsetof (struct kernel_dirent, d_reclen) + == offsetof (struct dirent, d_reclen))) { retval = INLINE_SYSCALL (getdents, 3, fd, CHECK_N(buf, nbytes), nbytes);