43 lines
1.3 KiB
Diff
43 lines
1.3 KiB
Diff
From c49c81a3c4409e7c1979ec8cb341fb0c57220616 Mon Sep 17 00:00:00 2001
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From: Helmut Grohne <helmut@subdivi.de>
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Date: Sat, 17 May 2025 22:48:05 +0200
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Subject: [PATCH] phere: avoid integer underflow
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Link: https://talosintelligence.com/vulnerability_reports/TALOS-2021-1434
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Bug: https://sourceforge.net/p/sox/bugs/362/
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Bug-Debian: https://bugs.debian.org/1012138
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Upstream: https://sourceforge.net/p/sox/bugs/362/
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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src/sphere.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/src/sphere.c b/src/sphere.c
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index a3fd1c64..9544d160 100644
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--- a/src/sphere.c
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+++ b/src/sphere.c
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@@ -63,7 +63,8 @@ static int start_read(sox_format_t * ft)
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return (SOX_EOF);
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}
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- header_size -= (strlen(buf) + 1);
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+ bytes_read = strlen(buf);
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+ header_size -= bytes_read >= header_size ? header_size : bytes_read + 1;
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while (strncmp(buf, "end_head", (size_t)8) != 0) {
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if (strncmp(buf, "sample_n_bytes", (size_t)14) == 0)
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@@ -105,7 +106,8 @@ static int start_read(sox_format_t * ft)
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return (SOX_EOF);
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}
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- header_size -= (strlen(buf) + 1);
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+ bytes_read = strlen(buf);
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+ header_size -= bytes_read >= header_size ? header_size : bytes_read + 1;
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}
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if (!bytes_per_sample)
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--
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2.49.0
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