Fix error handling in grub_file_open()

Signed-off-by: Robbie Harwood <rharwood@redhat.com>

0152-kern-file-Fix-error-handling-in-grub_file_open.patch

@@ -0,0 +1,34 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Steve McIntyre <steve@einval.com>
+Date: Tue, 6 Dec 2022 01:45:11 +0000
+Subject: [PATCH] kern/file: Fix error handling in grub_file_open()
+
+grub_file_open() calls grub_file_get_device_name(), but doesn't check
+the return. Instead, it checks if grub_errno is set.
+
+However, nothing initialises grub_errno here when grub_file_open()
+starts. This means that trying to open one file that doesn't exist and
+then trying to open another file that does will (incorrectly) also
+fail to open that second file.
+
+Let's fix that.
+
+Signed-off-by: Steve McIntyre <steve@einval.com>
+---
+ grub-core/kern/file.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/grub-core/kern/file.c b/grub-core/kern/file.c
+index 58454458c4..5b58f45cfd 100644
+--- a/grub-core/kern/file.c
++++ b/grub-core/kern/file.c
+@@ -66,6 +66,9 @@ grub_file_open (const char *name, enum grub_file_type type)
+   const char *file_name;
+   grub_file_filter_id_t filter;
+ 
++  /* Reset grub_errno before we start */
++  grub_errno = GRUB_ERR_NONE;
++
+   device_name = grub_file_get_device_name (name);
+   if (grub_errno)
+     goto fail;

0153-grub_file_-instrumentation-new-file-debug-tag.patch

@@ -12,7 +12,7 @@ Signed-off-by: Renaud Métrich <rmetrich@redhat.com>
  1 file changed, 14 insertions(+)
 
 diff --git a/grub-core/kern/file.c b/grub-core/kern/file.c
-index 58454458c4..e19aea3e51 100644
+index 5b58f45cfd..ec10e54fc0 100644
 --- a/grub-core/kern/file.c
 +++ b/grub-core/kern/file.c
 @@ -66,6 +66,8 @@ grub_file_open (const char *name, enum grub_file_type type)
@@ -21,10 +21,10 @@ index 58454458c4..e19aea3e51 100644
  
 +  grub_dprintf ("file", "Opening `%s' ...\n", name);
 +
-   device_name = grub_file_get_device_name (name);
-   if (grub_errno)
-     goto fail;
-@@ -128,6 +130,8 @@ grub_file_open (const char *name, enum grub_file_type type)
+   /* Reset grub_errno before we start */
+   grub_errno = GRUB_ERR_NONE;
+ 
+@@ -131,6 +133,8 @@ grub_file_open (const char *name, enum grub_file_type type)
    if (!file)
      grub_file_close (last_file);
  
@@ -33,7 +33,7 @@ index 58454458c4..e19aea3e51 100644
    return file;
  
   fail:
-@@ -138,6 +142,8 @@ grub_file_open (const char *name, enum grub_file_type type)
+@@ -141,6 +145,8 @@ grub_file_open (const char *name, enum grub_file_type type)
  
    grub_free (file);
  
@@ -42,7 +42,7 @@ index 58454458c4..e19aea3e51 100644
    return 0;
  }
  
-@@ -169,6 +175,7 @@ grub_file_read (grub_file_t file, void *buf, grub_size_t len)
+@@ -172,6 +178,7 @@ grub_file_read (grub_file_t file, void *buf, grub_size_t len)
  
    if (len == 0)
      return 0;
@@ -50,7 +50,7 @@ index 58454458c4..e19aea3e51 100644
    read_hook = file->read_hook;
    read_hook_data = file->read_hook_data;
    if (!file->read_hook)
-@@ -189,11 +196,18 @@ grub_file_read (grub_file_t file, void *buf, grub_size_t len)
+@@ -192,11 +199,18 @@ grub_file_read (grub_file_t file, void *buf, grub_size_t len)
  grub_err_t
  grub_file_close (grub_file_t file)
  {

0227-kern-file-Do-not-leak-device_name-on-error-in-grub_f.patch

@@ -18,10 +18,10 @@ Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
  1 file changed, 2 insertions(+)
 
 diff --git a/grub-core/kern/file.c b/grub-core/kern/file.c
-index e19aea3e51..ed69fc0f0f 100644
+index ec10e54fc0..db938e099d 100644
 --- a/grub-core/kern/file.c
 +++ b/grub-core/kern/file.c
-@@ -81,6 +81,7 @@ grub_file_open (const char *name, enum grub_file_type type)
+@@ -84,6 +84,7 @@ grub_file_open (const char *name, enum grub_file_type type)
  
    device = grub_device_open (device_name);
    grub_free (device_name);
@@ -29,7 +29,7 @@ index e19aea3e51..ed69fc0f0f 100644
    if (! device)
      goto fail;
  
-@@ -135,6 +136,7 @@ grub_file_open (const char *name, enum grub_file_type type)
+@@ -138,6 +139,7 @@ grub_file_open (const char *name, enum grub_file_type type)
    return file;
  
   fail: