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51 lines
1.5 KiB
Diff
51 lines
1.5 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Mon, 8 Jan 2024 15:54:31 -0500
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Subject: [PATCH] grub-mount: work around bad integer comparison.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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gcc says:
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util/grub-mount.c: In function ‘fuse_read’:
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util/grub-mount.c:273:11: error: comparison of integer expressions of different signedness: ‘off_t’ {aka ‘long int’} and ‘grub_off_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
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273 | if (off > file->size)
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This is happening because grub_off_t is unsigned but the system's off_t is
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signed.
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That's too much work to fix today, so this patch works around it with
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tests and typecasting.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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util/grub-mount.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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diff --git a/util/grub-mount.c b/util/grub-mount.c
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index bf4c8b891be..d369e21666e 100644
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--- a/util/grub-mount.c
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+++ b/util/grub-mount.c
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@@ -269,11 +269,17 @@ fuse_read (const char *path, char *buf, size_t sz, off_t off,
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{
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grub_file_t file = files[fi->fh];
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grub_ssize_t size;
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+ grub_off_t offset;
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- if (off > file->size)
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+ if (off < 0)
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return -EINVAL;
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- file->offset = off;
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+ if ((grub_off_t)off > file->size)
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+ return -EINVAL;
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+
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+ offset = (grub_off_t)off;
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+
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+ file->offset = offset;
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size = grub_file_read (file, buf, sz);
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if (size < 0)
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