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iso9660: Don't leak memory on realloc() failures 

Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Peter Jones 2020-07-04 12:25:09 -04:00 committed by Daniel Kiper
parent 3f05d693d1
commit 2a1edcf2ed
1 changed files with 20 additions and 4 deletions
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24
grub-core/fs/iso9660.c
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@ -533,14 +533,20 @@ add_part (struct iterate_dir_ctx *ctx,
{
int size = ctx->symlink ? grub_strlen (ctx->symlink) : 0;
grub_size_t sz;
char *new;
if (grub_add (size, len2, &sz) ||
grub_add (sz, 1, &sz))
return;
ctx->symlink = grub_realloc (ctx->symlink, sz);
if (! ctx->symlink)
return;
new = grub_realloc (ctx->symlink, sz);
if (!new)
{
grub_free (ctx->symlink);
ctx->symlink = NULL;
return;
}
ctx->symlink = new;
grub_memcpy (ctx->symlink + size, part, len2);
ctx->symlink[size + len2] = 0;
@ -634,7 +640,12 @@ susp_iterate_dir (struct grub_iso9660_susp_entry *entry,
is the length. Both are part of the `Component
Record'. */
if (ctx->symlink && !ctx->was_continue)
add_part (ctx, "/", 1);
{
add_part (ctx, "/", 1);
if (grub_errno)
return grub_errno;
}
add_part (ctx, (char *) &entry->data[pos + 2],
entry->data[pos + 1]);
ctx->was_continue = (entry->data[pos] & 1);
@ -653,6 +664,11 @@ susp_iterate_dir (struct grub_iso9660_susp_entry *entry,
add_part (ctx, "/", 1);
break;
}
/* Check if grub_realloc() failed in add_part(). */
if (grub_errno)
return grub_errno;
/* In pos + 1 the length of the `Component Record' is
stored. */
pos += entry->data[pos + 1] + 2;