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From: Matt Fleming <matt@console-pimps.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Matthew Garret <mjg@redhat.com>,
	Matt Fleming <matt.fleming@intel.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org
Subject: [PATCH 1/3] x86, efi: Only close open files in error path
Date: Fri, 16 Mar 2012 14:18:35 +0000
Message-ID: <1331907517-3985-2-git-send-email-matt@console-pimps.org> (raw)
In-Reply-To: <1331907517-3985-1-git-send-email-matt@console-pimps.org>

From: Matt Fleming <matt.fleming@intel.com>

The loop at the 'close_handles' label in handle_ramdisks() should be
using 'i', which represents the number of initrd files that were
successfully opened, not 'nr_initrds' which is the number of initrd=
arguments passed on the command line.

Currently, if we execute the loop to close all file handles and we
failed to open any initrds we'll try to call the close function on a
garbage pointer, causing the machine to hang.

Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
---
 arch/x86/boot/compressed/eboot.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index fec216f..fb810ce 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -674,7 +674,7 @@ free_initrd_total:
 	low_free(initrd_total, initrd_addr);
 
 close_handles:
-	for (k = j; k < nr_initrds; k++)
+	for (k = j; k < i; k++)
 		efi_call_phys1(fh->close, initrds[k].handle);
 free_initrds:
 	efi_call_phys1(sys_table->boottime->free_pool, initrds);
-- 
1.7.4.4


  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-16 14:18 [PATCH 0/3] x86, efi: EFI boot stub documentation Matt Fleming
2012-03-16 14:18 ` Matt Fleming [this message]
2012-06-01 19:11   ` [tip:x86/efi] x86, efi: Only close open files in error path tip-bot for Matt Fleming
2012-03-16 14:18 ` [PATCH 2/3] x86, efi; Add EFI boot stub console support Matt Fleming
2012-06-01 19:11   ` [tip:x86/efi] " tip-bot for Matt Fleming
2012-03-16 14:18 ` [PATCH 3/3] x86, efi: Add EFI boot stub documentation Matt Fleming
2012-06-01 19:13   ` [tip:x86/efi] " tip-bot for Matt Fleming
2012-03-20 23:57 ` [PATCH 0/3] x86, efi: " Shea Levy
2012-03-21  0:00   ` H. Peter Anvin
2012-05-04 10:27 ` Matt Fleming

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