forked from pool/grub2
Accepting request 1073668 from Base:System
OBS-URL: https://build.opensuse.org/request/show/1073668 OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/grub2?expand=0&rev=289
This commit is contained in:
Dominique Leuenberger
Git OBS Bridge
commit
1664ac0e15
146
0001-loader-linux-Ensure-the-newc-pathname-is-NULL-termin.patch
Normal file
146
0001-loader-linux-Ensure-the-newc-pathname-is-NULL-termin.patch
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@ -0,0 +1,146 @@
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From 1dcab5bf3843abc997f7e7dba32e5dbcb9bf66b2 Mon Sep 17 00:00:00 2001
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From: Gary Lin <glin@suse.com>
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Date: Fri, 25 Nov 2022 15:37:35 +0800
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Subject: [PATCH 1/2] loader/linux: Ensure the newc pathname is NULL-terminated
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Per "man 5 cpio", the namesize in the cpio header includes the trailing
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NUL byte of the pathname and the pathname is followed by NUL bytes, but
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the current implementation ignores the trailing NUL byte when making
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the newc header. Although make_header() tries to pad the pathname string,
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the padding won't happen when strlen(name) + sizeof(struct newc_head)
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is a multiple of 4, and the non-NULL-terminated pathname may lead to
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unexpected results.
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Assume that a file is created with 'echo -n aaaa > /boot/test12' and
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loaded by grub2:
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linux /boot/vmlinuz
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initrd newc:test12:/boot/test12 /boot/initrd
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The initrd command eventually invoked grub_initrd_load() and sent
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't''e''s''t''1''2' to make_header() to generate the header:
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00000070 30 37 30 37 30 31 33 30 31 43 41 30 44 45 30 30 |070701301CA0DE00|
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00000080 30 30 38 31 41 34 30 30 30 30 30 33 45 38 30 30 |0081A4000003E800|
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00000090 30 30 30 30 36 34 30 30 30 30 30 30 30 31 36 33 |0000640000000163|
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000000a0 37 36 45 34 35 32 30 30 30 30 30 30 30 34 30 30 |76E4520000000400|
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000000b0 30 30 30 30 30 38 30 30 30 30 30 30 31 33 30 30 |0000080000001300|
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000000c0 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 |0000000000000000|
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000000d0 30 30 30 30 30 36 30 30 30 30 30 30 30 30 74 65 |00000600000000te|
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^namesize
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000000e0 73 74 31 32 61 61 61 61 30 37 30 37 30 31 30 30 |st12aaaa07070100|
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^^ end of the pathname
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Since strlen("test12") + sizeof(struct newc_head) is 116 = 29 * 4,
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make_header() didn't pad the pathname, and the file content followed
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"test12" immediately. This violates the cpio format and may trigger such
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error during linux boot:
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Initramfs unpacking failed: ZSTD-compressed data is trunc
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To avoid the potential problems, this commit counts the trailing NUL byte
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in when calling make_header() and adjusts the initrd size accordingly.
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Now the header becomes
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00000070 30 37 30 37 30 31 33 30 31 43 41 30 44 45 30 30 |070701301CA0DE00|
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00000080 30 30 38 31 41 34 30 30 30 30 30 33 45 38 30 30 |0081A4000003E800|
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00000090 30 30 30 30 36 34 30 30 30 30 30 30 30 31 36 33 |0000640000000163|
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000000a0 37 36 45 34 35 32 30 30 30 30 30 30 30 34 30 30 |76E4520000000400|
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000000b0 30 30 30 30 30 38 30 30 30 30 30 30 31 33 30 30 |0000080000001300|
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000000c0 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 |0000000000000000|
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000000d0 30 30 30 30 30 37 30 30 30 30 30 30 30 30 74 65 |00000700000000te|
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^namesize
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000000e0 73 74 31 32 00 00 00 00 61 61 61 61 30 37 30 37 |st12....aaaa0707|
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^^ end of the pathname
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Besides the trailing NUL byte, make_header() pads 3 more NUL bytes, and
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the user can safely read the pathname without a further check.
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To conform to the cpio format, the headers for "TRAILER!!!" are also
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adjusted to include the trailing NUL byte, not ignore it.
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Signed-off-by: Gary Lin <glin@suse.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/loader/linux.c | 25 ++++++++++++++++++-------
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1 file changed, 18 insertions(+), 7 deletions(-)
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diff --git a/grub-core/loader/linux.c b/grub-core/loader/linux.c
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index 8f0fad805..e4018e65e 100644
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--- a/grub-core/loader/linux.c
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+++ b/grub-core/loader/linux.c
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@@ -130,12 +130,23 @@ insert_dir (const char *name, struct dir **root,
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n->name = grub_strndup (cb, ce - cb);
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if (ptr)
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{
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+ /*
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+ * Create the substring with the trailing NUL byte
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+ * to be included in the cpio header.
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+ */
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+ char *tmp_name = grub_strndup (name, ce - name);
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+ if (!tmp_name) {
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+ grub_free (n->name);
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+ grub_free (n);
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+ return grub_errno;
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+ }
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grub_dprintf ("linux", "Creating directory %s, %s\n", name, ce);
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- ptr = make_header (ptr, name, ce - name,
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+ ptr = make_header (ptr, tmp_name, ce - name + 1,
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040777, 0);
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+ grub_free (tmp_name);
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}
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if (grub_add (*size,
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- ALIGN_UP ((ce - (char *) name)
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+ ALIGN_UP ((ce - (char *) name + 1)
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+ sizeof (struct newc_head), 4),
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size))
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{
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@@ -260,7 +271,7 @@ grub_initrd_init (int argc, char *argv[],
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grub_initrd_close (initrd_ctx);
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return grub_errno;
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}
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- name_len = grub_strlen (initrd_ctx->components[i].newc_name);
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+ name_len = grub_strlen (initrd_ctx->components[i].newc_name) + 1;
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if (grub_add (initrd_ctx->size,
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ALIGN_UP (sizeof (struct newc_head) + name_len, 4),
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&initrd_ctx->size) ||
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@@ -274,7 +285,7 @@ grub_initrd_init (int argc, char *argv[],
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{
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if (grub_add (initrd_ctx->size,
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ALIGN_UP (sizeof (struct newc_head)
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- + sizeof ("TRAILER!!!") - 1, 4),
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+ + sizeof ("TRAILER!!!"), 4),
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&initrd_ctx->size))
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goto overflow;
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free_dir (root);
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@@ -302,7 +313,7 @@ grub_initrd_init (int argc, char *argv[],
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initrd_ctx->size = ALIGN_UP (initrd_ctx->size, 4);
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if (grub_add (initrd_ctx->size,
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ALIGN_UP (sizeof (struct newc_head)
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- + sizeof ("TRAILER!!!") - 1, 4),
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+ + sizeof ("TRAILER!!!"), 4),
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&initrd_ctx->size))
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goto overflow;
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free_dir (root);
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@@ -378,7 +389,7 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
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}
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else if (newc)
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{
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- ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!") - 1,
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+ ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!"),
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0, 0);
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free_dir (root);
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root = 0;
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@@ -406,7 +417,7 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
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{
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grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
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ptr += ALIGN_UP_OVERHEAD (cursize, 4);
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- ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!") - 1, 0, 0);
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+ ptr = make_header (ptr, "TRAILER!!!", sizeof ("TRAILER!!!"), 0, 0);
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}
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free_dir (root);
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root = 0;
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--
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2.39.2
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@ -0,0 +1,64 @@
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From 9f18541245858f53fea72d8d60304f9015d88b5f Mon Sep 17 00:00:00 2001
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From: Michael Chang <mchang@suse.com>
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Date: Fri, 17 Mar 2023 22:00:23 +0800
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Subject: [PATCH 2/2] Restrict cryptsetup key file permission for better
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security
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GRUB's default permission 777 for concatenated initrd files was too
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permissive for the cryptsetup key file, causing a complaint from
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systemd-cryptsetup during boot. This commit replaces the 0777 permission
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with a more secure 0400 permission for the key file.
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Signed-off-by: Michael Chang <mchang@suse.com>
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---
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grub-core/loader/linux.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/grub-core/loader/linux.c b/grub-core/loader/linux.c
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index e4018e65e..fc71a78d7 100644
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--- a/grub-core/loader/linux.c
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+++ b/grub-core/loader/linux.c
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@@ -32,6 +32,7 @@ struct grub_linux_initrd_component
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char *buf;
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char *newc_name;
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grub_off_t size;
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+ grub_uint32_t mode;
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};
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struct dir
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@@ -202,6 +203,7 @@ grub_initrd_component (const char *buf, int bufsz, const char *newc_name,
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grub_memcpy (comp->buf, buf, bufsz);
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initrd_ctx->nfiles++;
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comp->size = bufsz;
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+ comp->mode = 0100400;
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if (grub_add (initrd_ctx->size, comp->size,
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&initrd_ctx->size))
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goto overflow;
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@@ -271,6 +273,7 @@ grub_initrd_init (int argc, char *argv[],
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grub_initrd_close (initrd_ctx);
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return grub_errno;
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}
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+ initrd_ctx->components[i].mode = 0100777;
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name_len = grub_strlen (initrd_ctx->components[i].newc_name) + 1;
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if (grub_add (initrd_ctx->size,
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ALIGN_UP (sizeof (struct newc_head) + name_len, 4),
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@@ -372,6 +375,7 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
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if (initrd_ctx->components[i].newc_name)
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{
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grub_size_t dir_size;
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+ grub_uint32_t mode = initrd_ctx->components[i].mode;
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if (insert_dir (initrd_ctx->components[i].newc_name, &root, ptr,
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&dir_size))
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@@ -383,7 +387,7 @@ grub_initrd_load (struct grub_linux_initrd_context *initrd_ctx,
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ptr += dir_size;
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ptr = make_header (ptr, initrd_ctx->components[i].newc_name,
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grub_strlen (initrd_ctx->components[i].newc_name) + 1,
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- 0100777,
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+ mode,
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initrd_ctx->components[i].size);
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newc = 1;
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}
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--
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2.39.2
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@ -4,6 +4,7 @@ set -e
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# grub-mkconfig helper script.
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# Copyright (C) 2011 Michal Ambroz <rebus@seznam.cz>
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# Adapted for openSUSE by Andrey Borzenkov <arvidjaar@gmail.com>
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# Adapted for EFI by Hans-Peter Jansen <hpj@urpla.net>
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#
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# you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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@ -18,17 +19,11 @@ set -e
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# You should have received a copy of the GNU General Public License
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# along with the script. If not, see <http://www.gnu.org/licenses/>.
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. /usr/share/grub2/grub-mkconfig_lib
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. "$pkgdatadir/grub-mkconfig_lib"
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export TEXTDOMAIN=grub2
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export TEXTDOMAINDIR=/usr/share/locale
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# memset86+ requires the x86 real mode
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# which is not available with UEFI booting.
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if [ -d /sys/firmware/efi ]; then
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exit 0
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fi
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CLASS="--class memtest86 --class gnu --class tools"
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if [ "x${GRUB_DISTRIBUTOR}" = "x" ] ; then
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@ -38,7 +33,19 @@ else
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CLASS="--class $(echo ${GRUB_DISTRIBUTOR} | tr 'A-Z' 'a-z' | cut -d' ' -f1) ${CLASS}"
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fi
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memtest=/boot/memtest.bin
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# memtest86+ comes in two flavours, one EFI and one suitable for x86 real mode.
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# The EFI module requires security disabled in BIOS (Boot Mode: Other OS)
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if [ -d /sys/firmware/efi -a -f /boot/efi/EFI/memtest86/memtest.efi ]; then
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memtest=/boot/efi/EFI/memtest86/memtest.efi
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loader='linux '
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message="$(gettext_printf "Loading EFI memtest ...\n" | grub_quote)"
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# locate the real EFI partition
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GRUB_DEVICE_BOOT=$(grub2-probe -t device "$memtest")
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else
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memtest=/boot/memtest.bin
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loader='linux16'
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message="$(gettext_printf "Loading x86 memtest ...\n" | grub_quote)"
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fi
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if grub_file_is_not_garbage "$memtest" ; then
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gettext_printf "Found memtest image: %s\n" "$memtest" >&2
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@ -50,10 +57,10 @@ if grub_file_is_not_garbage "$memtest" ; then
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printf "menuentry '%s' %s \$menuentry_id_option '%s' {\n" "${OS}" "${CLASS}" "memtest-$boot_device_id"
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prepare_boot_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE_BOOT} | sed -e "s/^/\t/")"
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printf '%s\n' "${prepare_boot_cache}"
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message="$(gettext_printf "Loading memtest ...\n" | grub_quote)"
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cat << EOF
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echo '$message'
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linux16 ${rel_dirname}/${basename}
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echo '$message'
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${loader} ${rel_dirname}/${basename}
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}
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EOF
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fi
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@ -1,3 +1,18 @@
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-------------------------------------------------------------------
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Mon Mar 20 05:02:01 UTC 2023 - Michael Chang <mchang@suse.com>
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- Restrict cryptsetup key file permission for better security (bsc#1207499)
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* 0001-loader-linux-Ensure-the-newc-pathname-is-NULL-termin.patch
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* 0002-Restrict-cryptsetup-key-file-permission-for-better-s.patch
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-------------------------------------------------------------------
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Wed Mar 15 21:46:00 UTC 2023 - Hans-Peter Jansen <hpj@urpla.net>
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- Meanwhile, memtest86+ gained EFI support, but using the grub
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command line to run it manually is quite tedious...
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Adapt 20_memtest86+ to provide a proper menu entry. Executing
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memtest requires to turn security off in BIOS: (Boot Mode: Other OS).
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-------------------------------------------------------------------
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Mon Mar 13 15:43:01 UTC 2023 - rw@suse.com
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@ -503,6 +503,8 @@ Patch974: 0001-clean-up-crypttab-and-linux-modules-dependency.patch
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Patch975: 0002-discard-cached-key-before-entering-grub-shell-and-ed.patch
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# Make grub more robust against storage race condition causing system boot failures (bsc#1189036)
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Patch976: 0001-ieee1275-ofdisk-retry-on-open-and-read-failure.patch
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Patch977: 0001-loader-linux-Ensure-the-newc-pathname-is-NULL-termin.patch
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Patch978: 0002-Restrict-cryptsetup-key-file-permission-for-better-s.patch
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Requires: gettext-runtime
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%if 0%{?suse_version} >= 1140
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@ -528,6 +530,10 @@ Requires: s390-tools
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%ifarch ppc64 ppc64le
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Requires: powerpc-utils
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%endif
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%ifarch %{ix86}
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# meanwhile, memtest is available as EFI executable
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Recommends: memtest86+
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%endif
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%if 0%{?only_x86_64:1}
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ExclusiveArch: x86_64
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