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1b0b1651b1
This is the last bit fixing <https://bugs.gnu.org/35283>. Previously, 'mformat' (used by 'grub-mkrescue') would pass uninitialized bytes to write(2), leading to non-deterministic FAT image contents. This patch fixes that. * gnu/packages/patches/mtools-mformat-uninitialized.patch: New file. * gnu/packages/mtools.scm (mtools)[source]: Use it. * gnu/local.mk (dist_patch_DATA): Add it.
20 lines
573 B
Diff
20 lines
573 B
Diff
Fix a bug whereby 'mformat' could end up passing uninitialized bytes
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to write(2). This could be reproduced with:
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mformat -C -f 1440 -L 16 -N 77777777 -i /tmp/x ::
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where the output of /tmp/x would be non-deterministic.
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Patch by Ludovic Courtès <ludo@gnu.org>.
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--- mtools-4.0.23/mformat.c 2019-04-21 00:12:01.496116195 +0200
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+++ mtools-4.0.23/mformat.c 2019-04-21 00:12:36.675967157 +0200
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@@ -927,6 +927,7 @@ void mformat(int argc, char **argv, int
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char *endptr;
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+ memset(&boot.bytes, '\0', sizeof boot);
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hs = hs_set = 0;
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argtracks = 0;
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argheads = 0;
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