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xen: avoid memleaks on error 

When loading a Xen pv-kernel avoid memory leaks in case of errors.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Juergen Gross 2016-03-03 10:38:07 +01:00 committed by Daniel Kiper
parent 4231927e44
commit c69d1858f1
2 changed files with 14 additions and 7 deletions
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2
grub-core/loader/i386/xen.c
View File

@ -563,7 +563,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
{
err = grub_relocator_alloc_chunk_addr (relocator, &ch, max_addr, size);
if (err)
return err;
goto fail;
if (grub_initrd_load (&initrd_ctx, argv,
get_virtual_current_address (ch)))

19
grub-core/loader/i386/xen_fileXX.c
View File

@ -26,6 +26,8 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
char *buf;
char *ptr;
int has_paddr = 0;
grub_errno = GRUB_ERR_NONE;
if (grub_file_seek (elf->file, off) == (grub_off_t) -1)
return grub_errno;
buf = grub_malloc (sz);
@ -35,7 +37,8 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
if (grub_file_read (elf->file, buf, sz) != (grub_ssize_t) sz)
{
if (grub_errno)
return grub_errno;
goto out;
grub_free (buf);
return grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
elf->file->name);
}
@ -123,14 +126,14 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
{
xi->virt_base = grub_strtoull (ptr + sizeof ("VIRT_BASE=") - 1, &ptr, 16);
if (grub_errno)
return grub_errno;
goto out;
continue;
}
if (grub_strncmp (ptr, "VIRT_ENTRY=", sizeof ("VIRT_ENTRY=") - 1) == 0)
{
xi->entry_point = grub_strtoull (ptr + sizeof ("VIRT_ENTRY=") - 1, &ptr, 16);
if (grub_errno)
return grub_errno;
goto out;
continue;
}
if (grub_strncmp (ptr, "HYPERCALL_PAGE=", sizeof ("HYPERCALL_PAGE=") - 1) == 0)
@ -138,7 +141,7 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
xi->hypercall_page = grub_strtoull (ptr + sizeof ("HYPERCALL_PAGE=") - 1, &ptr, 16);
xi->has_hypercall_page = 1;
if (grub_errno)
return grub_errno;
goto out;
continue;
}
if (grub_strncmp (ptr, "ELF_PADDR_OFFSET=", sizeof ("ELF_PADDR_OFFSET=") - 1) == 0)
@ -146,7 +149,7 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
xi->paddr_offset = grub_strtoull (ptr + sizeof ("ELF_PADDR_OFFSET=") - 1, &ptr, 16);
has_paddr = 1;
if (grub_errno)
return grub_errno;
goto out;
continue;
}
}
@ -154,7 +157,11 @@ parse_xen_guest (grub_elf_t elf, struct grub_xen_file_info *xi,
xi->hypercall_page = (xi->hypercall_page << 12) + xi->virt_base;
if (!has_paddr)
xi->paddr_offset = xi->virt_base;
return GRUB_ERR_NONE;
out:
grub_free (buf);
return grub_errno;
}
#pragma GCC diagnostic ignored "-Wcast-align"