Handle FAT mtime of 0

Resolves: #2096192
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
This commit is contained in:
Robbie Harwood 2022-07-19 16:24:58 +00:00
parent f0ad2aaa26
commit e7aee52b19
5 changed files with 141 additions and 2 deletions

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@ -0,0 +1,25 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Fri, 15 Jul 2022 15:49:25 -0400
Subject: [PATCH] grub-probe: document the behavior of multiple -v
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
(cherry picked from commit 51a55233eed08f7f12276afd6b3724b807a0b680)
---
util/grub-probe.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/util/grub-probe.c b/util/grub-probe.c
index c6fac732b4..ba867319a7 100644
--- a/util/grub-probe.c
+++ b/util/grub-probe.c
@@ -732,7 +732,8 @@ static struct argp_option options[] = {
{"device-map", 'm', N_("FILE"), 0,
N_("use FILE as the device map [default=%s]"), 0},
{"target", 't', N_("TARGET"), 0, 0, 0},
- {"verbose", 'v', 0, 0, N_("print verbose messages."), 0},
+ {"verbose", 'v', 0, 0,
+ N_("print verbose messages (pass twice to enable debug printing)."), 0},
{0, '0', 0, 0, N_("separate items in output using ASCII NUL characters"), 0},
{ 0, 0, 0, 0, 0, 0 }
};

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@ -0,0 +1,43 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Fri, 15 Jul 2022 15:39:41 -0400
Subject: [PATCH] grub_fs_probe(): dprint errors from filesystems
When filesystem detection fails, all that's currently debug-logged is a
series of messages like:
grub-core/kern/fs.c:56:fs: Detecting ntfs...
grub-core/kern/fs.c:76:fs: ntfs detection failed.
repeated for each filesystem. Any messages provided to grub_error() by
the filesystem are lost, and one has to break out gdb to figure out what
went wrong.
With this change, one instead sees:
grub-core/kern/fs.c:56:fs: Detecting fat...
grub-core/osdep/hostdisk.c:357:hostdisk: reusing open device
`/path/to/device'
grub-core/kern/fs.c:77:fs: error: invalid modification timestamp for /.
grub-core/kern/fs.c:79:fs: fat detection failed.
in the debug prints.
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
(cherry picked from commit 838c79d658797d0662ee7f9e033e38ee88059e02)
---
grub-core/kern/fs.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/grub-core/kern/fs.c b/grub-core/kern/fs.c
index c698295bcb..b58e2ae1d2 100644
--- a/grub-core/kern/fs.c
+++ b/grub-core/kern/fs.c
@@ -74,6 +74,7 @@ grub_fs_probe (grub_device_t device)
if (grub_errno == GRUB_ERR_NONE)
return p;
+ grub_dprintf ("fs", _("error: %s.\n"), grub_errmsg);
grub_error_push ();
grub_dprintf ("fs", "%s detection failed.\n", p->name);
grub_error_pop ();

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@ -0,0 +1,64 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Fri, 15 Jul 2022 15:42:41 -0400
Subject: [PATCH] fs/fat: don't error when mtime is 0
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In the wild, we occasionally see valid ESPs where some file modification times
are 0. For instance:
├── [Dec 31 1979] EFI
│ ├── [Dec 31 1979] BOOT
│ │ ├── [Dec 31 1979] BOOTX64.EFI
│ │ └── [Dec 31 1979] fbx64.efi
│ └── [Jun 27 02:41] fedora
│ ├── [Dec 31 1979] BOOTX64.CSV
│ ├── [Dec 31 1979] fonts
│ ├── [Mar 14 03:35] fw
│ │ ├── [Mar 14 03:35] fwupd-359c1169-abd6-4a0d-8bce-e4d4713335c1.cap
│ │ ├── [Mar 14 03:34] fwupd-9d255c4b-2d88-4861-860d-7ee52ade9463.cap
│ │ └── [Mar 14 03:34] fwupd-b36438d8-9128-49d2-b280-487be02d948b.cap
│ ├── [Dec 31 1979] fwupdx64.efi
│ ├── [May 10 10:47] grub.cfg
│ ├── [Jun 3 12:38] grub.cfg.new.new
│ ├── [May 10 10:41] grub.cfg.old
│ ├── [Jun 27 02:41] grubenv
│ ├── [Dec 31 1979] grubx64.efi
│ ├── [Dec 31 1979] mmx64.efi
│ ├── [Dec 31 1979] shim.efi
│ ├── [Dec 31 1979] shimx64.efi
│ └── [Dec 31 1979] shimx64-fedora.efi
└── [Dec 31 1979] FSCK0000.REC
5 directories, 17 files
This causes grub-probe failure, which in turn causes grub-mkconfig
failure. They are valid filesystems that appear intact, and the Linux
FAT stack is able to mount and manipulate them without complaint.
The check for mtime of 0 has been present since
20def1a3c3952982395cd7c3ea7e78638527962b ("fat: support file
modification times").
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
(cherry picked from commit 0615c4887352e32d7bb7198e9ad0d695f9dc2c31)
---
grub-core/fs/fat.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/grub-core/fs/fat.c b/grub-core/fs/fat.c
index dd82e4ee35..ff6200c5be 100644
--- a/grub-core/fs/fat.c
+++ b/grub-core/fs/fat.c
@@ -1027,9 +1027,6 @@ grub_fat_dir (grub_device_t device, const char *path, grub_fs_dir_hook_t hook,
grub_le_to_cpu16 (ctxt.dir.w_date),
&info.mtime);
#endif
- if (info.mtimeset == 0)
- grub_error (GRUB_ERR_OUT_OF_RANGE,
- "invalid modification timestamp for %s", path);
if (hook (ctxt.filename, &info, hook_data))
break;

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@ -264,3 +264,6 @@ Patch0263: 0263-nx-add-memory-attribute-get-set-API.patch
Patch0264: 0264-nx-set-page-permissions-for-loaded-modules.patch
Patch0265: 0265-nx-set-attrs-in-our-kernel-loaders.patch
Patch0266: 0266-nx-set-the-nx-compatible-flag-in-EFI-grub-images.patch
Patch0267: 0267-grub-probe-document-the-behavior-of-multiple-v.patch
Patch0268: 0268-grub_fs_probe-dprint-errors-from-filesystems.patch
Patch0269: 0269-fs-fat-don-t-error-when-mtime-is-0.patch

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@ -17,7 +17,7 @@
Name: grub2
Epoch: 1
Version: 2.06
Release: 42%{?dist}
Release: 43%{?dist}
Summary: Bootloader with support for Linux, Multiboot and more
License: GPLv3+
URL: http://www.gnu.org/software/grub/
@ -530,7 +530,11 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
%endif
%changelog
* Mon May 16 2022 Robbie Harwood <rharwood@redhat.com> 1:2.06-42
* Tue Jul 19 2022 Robbie Harwood <rharwood@redhat.com> - 2.06-43
- Handle FAT mtime of 0
- Resolves: #2096192
* Mon May 16 2022 Robbie Harwood <rharwood@redhat.com> - 1:2.06-42
- CVE fixes for 2022-05-24
- Resolves: CVE-2022-28736 CVE-2022-28735 CVE-2022-28734 CVE-2022-28733
- Resolves: CVE-2021-3697 CVE-2021-3696 CVE-2021-3695