61 lines
2.4 KiB
Diff
61 lines
2.4 KiB
Diff
From db77f4c0ce0298625f75059cb6b8c31e61350753 Mon Sep 17 00:00:00 2001
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From: Zdenek Hutyra <zhutyra@centrum.cz>
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Date: Mon, 13 Jan 2025 09:07:57 +0000
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Subject: Bug 708192: Fix potential print buffer overflow
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CVE-2025-27836
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---
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contrib/japanese/gdev10v.c | 22 ++++++++++++++++------
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1 file changed, 16 insertions(+), 6 deletions(-)
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diff --git a/contrib/japanese/gdev10v.c b/contrib/japanese/gdev10v.c
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index 0bd3cec02..9d27573dc 100644
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--- a/contrib/japanese/gdev10v.c
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+++ b/contrib/japanese/gdev10v.c
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@@ -199,17 +199,25 @@ bj10v_print_page(gx_device_printer *pdev, gp_file *prn_stream)
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int bytes_per_column = bits_per_column / 8;
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int x_skip_unit = bytes_per_column * (xres / 180);
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int y_skip_unit = (yres / 180);
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- byte *in = (byte *)gs_malloc(pdev->memory->non_gc_memory, 8, line_size, "bj10v_print_page(in)");
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- /* We need one extra byte in <out> for our sentinel. */
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- byte *out = (byte *)gs_malloc(pdev->memory->non_gc_memory, bits_per_column * line_size + 1, 1, "bj10v_print_page(out)");
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+ byte *in, *out;
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int lnum = 0;
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int y_skip = 0;
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int code = 0;
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int blank_lines = 0;
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int bytes_per_data = ((xres == 360) && (yres == 360)) ? 1 : 3;
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- if ( in == 0 || out == 0 )
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- return -1;
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+ if (bits_per_column == 0 || line_size > (max_int - 1) / bits_per_column) {
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+ code = gs_note_error(gs_error_rangecheck);
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+ goto error;
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+ }
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+
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+ in = (byte *)gs_malloc(pdev->memory->non_gc_memory, 8, line_size, "bj10v_print_page(in)");
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+ /* We need one extra byte in <out> for our sentinel. */
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+ out = (byte *)gs_malloc(pdev->memory->non_gc_memory, bits_per_column * line_size + 1, 1, "bj10v_print_page(out)");
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+ if ( in == NULL || out == NULL ) {
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+ code = gs_note_error(gs_error_VMerror);
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+ goto error;
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+ }
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/* Initialize the printer. */
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prn_puts(pdev, "\033@");
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@@ -320,8 +328,10 @@ notz:
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}
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/* Eject the page */
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-xit: prn_putc(pdev, 014); /* form feed */
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+xit:
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+ prn_putc(pdev, 014); /* form feed */
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prn_flush(pdev);
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+error:
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gs_free(pdev->memory->non_gc_memory, (char *)out, bits_per_column, line_size, "bj10v_print_page(out)");
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gs_free(pdev->memory->non_gc_memory, (char *)in, 8, line_size, "bj10v_print_page(in)");
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return code;
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--
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cgit v1.2.3
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