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linux: Fix fstatat on MIPSn64 (BZ #29730)

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Commit 6e8a0aac2f ("time: Fix overflow itimer tests on 32-bit
systems") changed in_time_t_range to assume a 32-bit time_t. This broke
fstatat on MIPSn64 that was using it with a 64-bit time_t due to
difference between stat and stat64. This commit fix that by adding a
MIPSn64 specific version, which bypasses the EOVERFLOW tests.

Resolves: BZ #29730

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
(cherry picked from commit 7457b7eef8)
This commit is contained in:
Aurelien Jarno 2022-11-01 20:43:55 +01:00
parent 4c6a78adda
commit dd4131c832
2 changed files with 52 additions and 0 deletions
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@ -45,6 +45,7 @@ The following bugs are resolved with this release:
[29638] libc: stdlib: arc4random fallback is never used
[29657] libc: Incorrect struct stat for 64-bit time on linux/generic
platforms
[29730] broken y2038 support in fstatat on MIPS N64
Version 2.36

51
sysdeps/unix/sysv/linux/mips/mips64/n64/fstatat.c Normal file
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@ -0,0 +1,51 @@
/* Get file status. Linux/MIPSn64 version.
Copyright (C) 2022 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
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sys/stat.h>
#include <sysdep.h>
/* Different than other ABIs, mips64 has different layouts for non-LFS
and LFS struct stat. */
int
__fstatat (int fd, const char *file, struct stat *buf, int flag)
{
struct __stat64_t64 st64;
int r = __fstatat64_time64 (fd, file, &st64, flag);
if (r == 0)
{
/* Clear internal pad and reserved fields. */
memset (buf, 0, sizeof (*buf));
buf->st_dev = st64.st_dev;
buf->st_ino = st64.st_ino;
buf->st_mode = st64.st_mode;
buf->st_nlink = st64.st_nlink;
buf->st_uid = st64.st_uid;
buf->st_gid = st64.st_gid;
buf->st_rdev = st64.st_rdev;
buf->st_size = st64.st_size;
buf->st_blksize = st64.st_blksize;
buf->st_blocks = st64.st_blocks;
buf->st_atim = st64.st_atim;
buf->st_mtim = st64.st_mtim;
buf->st_ctim = st64.st_ctim;
}
return r;
}
weak_alias (__fstatat, fstatat)