From 6afbe6063c95b827372f9ec310c9fc7461311eb1 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Mon, 11 Jan 2021 16:57:37 +1100
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Subject: [PATCH] commands/ls: Require device_name is not NULL before printing
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This can be triggered with:
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ls -l (0 0*)
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and causes a NULL deref in grub_normal_print_device_info().
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I'm not sure if there's any implication with the IEEE 1275 platform.
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
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---
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grub-core/commands/ls.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/grub-core/commands/ls.c b/grub-core/commands/ls.c
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index 5b7491a..326d2d6 100644
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--- a/grub-core/commands/ls.c
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+++ b/grub-core/commands/ls.c
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@@ -196,7 +196,7 @@ grub_ls_list_files (char *dirname, int longlist, int all, int human)
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goto fail;
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}
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- if (! *path)
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+ if (! *path && device_name)
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{
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if (grub_errno == GRUB_ERR_UNKNOWN_FS)
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grub_errno = GRUB_ERR_NONE;
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--
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2.14.2
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