6eaa34fe07
- Resolves: CVE-2024-45779 CVE-2024-45778 CVE-2025-1118 - Resolves: CVE-2025-0677 CVE-2024-45782 CVE-2025-0690 - Resolves: CVE-2024-45783 CVE-2025-0624 CVE-2024-45776 - Resolves: CVE-2025-0622 CVE-2024-45774 CVE-2024-45775 - Resolves: CVE-2024-45781 CVE-2024-45780 - Resolves: #RHEL-79700 - Resolves: #RHEL-79341 - Resolves: #RHEL-79875 - Resolves: #RHEL-79849 - Resolves: #RHEL-79707 - Resolves: #RHEL-79857 - Resolves: #RHEL-79709 - Resolves: #RHEL-79846 - Resolves: #RHEL-75737 - Resolves: #RHEL-79713 - Resolves: #RHEL-73785 - Resolves: #RHEL-73787 - Resolves: #RHEL-79704 - Resolves: #RHEL-79702 Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>
45 lines
1.6 KiB
Diff
45 lines
1.6 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: B Horn <b@horn.uk>
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Date: Sat, 16 Nov 2024 21:24:19 +0000
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Subject: [PATCH] kern/partition: Limit recursion in part_iterate()
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The part_iterate() is used by grub_partition_iterate() as a callback in
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the partition iterate functions. However, part_iterate() may also call
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the partition iterate functions which may lead to recursion. Fix potential
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issue by limiting the recursion depth.
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Signed-off-by: B Horn <b@horn.uk>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/kern/partition.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/grub-core/kern/partition.c b/grub-core/kern/partition.c
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index 3068c4dca..f3f125e75 100644
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--- a/grub-core/kern/partition.c
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+++ b/grub-core/kern/partition.c
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@@ -28,6 +28,9 @@
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grub_partition_map_t grub_partition_map_list;
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+#define MAX_RECURSION_DEPTH 32
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+static unsigned int recursion_depth = 0;
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+
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/*
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* Checks that disk->partition contains part. This function assumes that the
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* start of part is relative to the start of disk->partition. Returns 1 if
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@@ -208,7 +211,12 @@ part_iterate (grub_disk_t dsk, const grub_partition_t partition, void *data)
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FOR_PARTITION_MAPS(partmap)
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{
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grub_err_t err;
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- err = partmap->iterate (dsk, part_iterate, ctx);
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+ recursion_depth++;
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+ if (recursion_depth <= MAX_RECURSION_DEPTH)
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+ err = partmap->iterate (dsk, part_iterate, ctx);
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+ else
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+ err = grub_error (GRUB_ERR_RECURSION_DEPTH, "maximum recursion depth exceeded");
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+ recursion_depth--;
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if (err)
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grub_errno = GRUB_ERR_NONE;
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if (ctx->ret)
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