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commands/ls: Require device_name is not NULL before printing

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This can be triggered with:
  ls -l (0 0*)
and causes a NULL deref in grub_normal_print_device_info().

I'm not sure if there's any implication with the IEEE 1275 platform.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Daniel Axtens 2021-01-11 16:57:37 +11:00 committed by Daniel Kiper
parent 41ae93b2e6
commit 6afbe6063c
1 changed files with 1 additions and 1 deletions
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2
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)
goto fail;
}
if (! *path)
if (! *path && device_name)
{
if (grub_errno == GRUB_ERR_UNKNOWN_FS)
grub_errno = GRUB_ERR_NONE;