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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Chris Coulson <chris.coulson@canonical.com>
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Date: Wed, 6 Jan 2021 13:54:26 +0000
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Subject: [PATCH] kern/parser: Refactor grub_parser_split_cmdline() cleanup
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Introduce a common function epilogue used for cleaning up on all
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return paths, which will simplify additional error handling to be
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introduced in a subsequent commit.
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Signed-off-by: Chris Coulson <chris.coulson@canonical.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/kern/parser.c | 35 ++++++++++++++++++++---------------
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1 file changed, 20 insertions(+), 15 deletions(-)
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diff --git a/grub-core/kern/parser.c b/grub-core/kern/parser.c
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index 572c67089f3..e010eaa1fa1 100644
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--- a/grub-core/kern/parser.c
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+++ b/grub-core/kern/parser.c
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@@ -221,19 +221,13 @@ grub_parser_split_cmdline (const char *cmdline,
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if (process_char (*rp, buffer, &bp, varname, &vp, state, argc,
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&newstate) != GRUB_ERR_NONE)
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- {
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- if (rd != cmdline)
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- grub_free (rd);
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- return grub_errno;
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- }
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+ goto fail;
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+
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state = newstate;
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}
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}
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while (state != GRUB_PARSER_STATE_TEXT && !check_varstate (state));
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- if (rd != cmdline)
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- grub_free (rd);
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-
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/* A special case for when the last character was part of a
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variable. */
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add_var (varname, &bp, &vp, state, GRUB_PARSER_STATE_TEXT);
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@@ -243,20 +237,20 @@ grub_parser_split_cmdline (const char *cmdline,
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/* If there are no args, then we're done. */
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if (!*argc)
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- return 0;
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+ {
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+ grub_errno = GRUB_ERR_NONE;
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+ goto out;
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+ }
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/* Reserve memory for the return values. */
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args = grub_malloc (bp - buffer);
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if (!args)
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- return grub_errno;
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+ goto fail;
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grub_memcpy (args, buffer, bp - buffer);
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*argv = grub_calloc (*argc + 1, sizeof (char *));
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if (!*argv)
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- {
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- grub_free (args);
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- return grub_errno;
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- }
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+ goto fail;
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/* The arguments are separated with 0's, setup argv so it points to
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the right values. */
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@@ -269,7 +263,18 @@ grub_parser_split_cmdline (const char *cmdline,
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bp++;
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}
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- return 0;
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+ grub_errno = GRUB_ERR_NONE;
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+
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+ out:
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+ if (rd != cmdline)
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+ grub_free (rd);
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+
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+ return grub_errno;
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+
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+ fail:
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+ grub_free (*argv);
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+ grub_free (args);
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+ goto out;
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}
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/* Helper for grub_parser_execute. */
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