28 lines
1002 B
Diff
28 lines
1002 B
Diff
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Author: Li Qiang <liqiang6-s@360.cn>
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Date: Mon Oct 17 14:13:58 2016 +0200
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9pfs: fix information leak in xattr read
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9pfs uses g_malloc() to allocate the xattr memory space, if the guest
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reads this memory before writing to it, this will leak host heap memory
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to the guest. This patch avoid this.
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Signed-off-by: Li Qiang <liqiang6-s@360.cn>
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Reviewed-by: Greg Kurz <groug@kaod.org>
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Signed-off-by: Greg Kurz <groug@kaod.org>
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diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
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index 26aa7d5..bf23b01 100644
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--- a/hw/9pfs/9p.c
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+++ b/hw/9pfs/9p.c
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@@ -3269,8 +3269,8 @@ static void coroutine_fn v9fs_xattrcreate(void *opaque)
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xattr_fidp->fs.xattr.flags = flags;
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v9fs_string_init(&xattr_fidp->fs.xattr.name);
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v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
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g_free(xattr_fidp->fs.xattr.value);
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- xattr_fidp->fs.xattr.value = g_malloc(size);
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+ xattr_fidp->fs.xattr.value = g_malloc0(size);
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err = offset;
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put_fid(pdu, file_fidp);
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out_nofid:
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