From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: xen-devel@lists.xenproject.org, konrad@kernel.org,
sasha.levin@oracle.com, andrew.cooper3@citrix.com,
ross.lagerwall@citrix.com, mpohlack@amazon.de
Cc: Keir Fraser <keir@xen.org>, Tim Deegan <tim@xen.org>,
Ian Jackson <ian.jackson@eu.citrix.com>,
Jan Beulich <jbeulich@suse.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: [PATCH v7 23/24] xsplice: Prevent duplicate payloads from being loaded.
Date: Sun, 10 Apr 2016 17:14:55 -0400 [thread overview]
Message-ID: <1460322896-1115-24-git-send-email-konrad.wilk@oracle.com> (raw)
In-Reply-To: <1460322896-1115-1-git-send-email-konrad.wilk@oracle.com>
From: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Keir Fraser <keir@xen.org>
Cc: Tim Deegan <tim@xen.org>
v6: Drop recursive lock - also now the caller is holding the lock
Move the code up in the code above.
v7: Add Andrew's Reviewed-by
---
---
xen/common/xsplice.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/xen/common/xsplice.c b/xen/common/xsplice.c
index a0cc345..ab306d4 100644
--- a/xen/common/xsplice.c
+++ b/xen/common/xsplice.c
@@ -514,7 +514,9 @@ static int prepare_payload(struct payload *payload,
sec = xsplice_elf_sec_by_name(elf, ".note.gnu.build-id");
if ( sec )
{
+ struct payload *data;
n = sec->load_addr;
+
if ( sec->sec->sh_size <= sizeof(*n) )
return -EINVAL;
@@ -524,6 +526,20 @@ static int prepare_payload(struct payload *payload,
if ( !payload->id.len || !payload->id.p )
return -EINVAL;
+
+ /* Make sure it is not a duplicate. */
+ list_for_each_entry ( data, &payload_list, list )
+ {
+ /* No way _this_ payload is on the list. */
+ ASSERT(data != payload);
+ if ( data->id.len &&
+ !memcmp(data->id.p, payload->id.p, data->id.len) )
+ {
+ dprintk(XENLOG_DEBUG, XSPLICE "%s: Already loaded as %s!\n",
+ elf->name, data->name);
+ return -EEXIST;
+ }
+ }
}
sec = xsplice_elf_sec_by_name(elf, ".xsplice.depends");
--
2.5.0
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next prev parent reply other threads:[~2016-04-10 21:15 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-10 21:14 [PATCH v7] xSplice v1 design and implementation Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 01/24] xsplice: Design document Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 02/24] xen/xsplice: Hypervisor implementation of XEN_XSPLICE_op Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 03/24] libxc: Implementation of XEN_XSPLICE_op in libxc Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 04/24] xen-xsplice: Tool to manipulate xsplice payloads Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 05/24] arm/x86: Use struct virtual_region to do bug, symbol, and (x86) exception tables lookup Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 06/24] arm/x86/vmap: Add vmalloc_xen, vfree_xen and vm_init_type Konrad Rzeszutek Wilk
2016-04-11 9:39 ` Andrew Cooper
2016-04-11 13:29 ` Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 07/24] x86/mm: Introduce modify_xen_mappings() Konrad Rzeszutek Wilk
2016-04-11 12:51 ` George Dunlap
2016-04-11 13:00 ` Andrew Cooper
2016-04-11 14:04 ` [PATCH v7.1 " Andrew Cooper
2016-04-11 15:21 ` George Dunlap
2016-04-11 17:18 ` Jan Beulich
2016-04-11 17:33 ` Andrew Cooper
2016-04-11 17:46 ` [PATCH v7.2 " Andrew Cooper
2016-04-11 17:54 ` Jan Beulich
2016-04-12 9:08 ` Andrew Cooper
2016-04-10 21:14 ` [PATCH v7 08/24] xsplice: Add helper elf routines Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 09/24] xsplice: Implement payload loading Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 10/24] xsplice: Implement support for applying/reverting/replacing patches Konrad Rzeszutek Wilk
2016-04-11 10:14 ` Andrew Cooper
2016-04-11 13:29 ` Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 11/24] x86/xen_hello_world.xsplice: Test payload for patching 'xen_extra_version' Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 12/24] xsplice, symbols: Implement symbol name resolution on address Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 13/24] x86, xsplice: Print payload's symbol name and payload name in backtraces Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 14/24] xsplice: Add support for bug frames Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 15/24] xsplice: Add support for exception tables Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 16/24] xsplice: Add support for alternatives Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 17/24] build_id: Provide ld-embedded build-ids Konrad Rzeszutek Wilk
2016-04-11 12:17 ` Andrew Cooper
2016-04-11 13:31 ` Konrad Rzeszutek Wilk
2016-04-11 13:35 ` Andrew Cooper
2016-04-10 21:14 ` [PATCH v7 18/24] HYPERCALL_version_op: Add VERSION_build_id to retrieve build-id Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 19/24] libxl: info: Display build_id of the hypervisor using XEN_VERSION_build_id Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 20/24] xsplice: Print build_id in keyhandler and on bootup Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 21/24] xsplice: Stacking build-id dependency checking Konrad Rzeszutek Wilk
2016-04-10 21:14 ` [PATCH v7 22/24] xsplice/xen_replace_world: Test-case for XSPLICE_ACTION_REPLACE Konrad Rzeszutek Wilk
2016-04-10 21:14 ` Konrad Rzeszutek Wilk [this message]
2016-04-10 21:14 ` [PATCH v7 24/24] MAINTAINERS/xsplice: Add myself and Ross as the maintainers Konrad Rzeszutek Wilk
2016-04-11 14:32 ` [PATCH v7] xSplice v1 design and implementation Konrad Rzeszutek Wilk
2016-04-11 15:43 ` Konrad Rzeszutek Wilk
2016-04-12 8:10 ` Ross Lagerwall
2016-04-12 20:59 ` Konrad Rzeszutek Wilk
2016-04-12 20:59 ` [PATCH v7 25/24] symbols/xsplice: Implement fast symbol names -> virtual addresses lookup Konrad Rzeszutek Wilk
2016-04-13 2:03 ` Konrad Rzeszutek Wilk
2016-04-13 2:17 ` Konrad Rzeszutek Wilk
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