linux-stable.git/net/ceph/crypto.c, branch linux-3.2.y Linux kernel stable tree libceph: do not crash on large auth tickets 2014-12-14T16:23:56+00:00 Ilya Dryomov idryomov@redhat.com 2014-10-22T20:25:22+00:00 42fdf7a1b541fd34f5b58b7ccf99fbbd6de46013 commit aaef31703a0cf6a733e651885bfb49edc3ac6774 upstream. Large (greater than 32k, the value of PAGE_ALLOC_COSTLY_ORDER) auth tickets will have their buffers vmalloc'ed, which leads to the following crash in crypto: [ 28.685082] BUG: unable to handle kernel paging request at ffffeb04000032c0 [ 28.686032] IP: [<ffffffff81392b42>] scatterwalk_pagedone+0x22/0x80 [ 28.686032] PGD 0 [ 28.688088] Oops: 0000 [#1] PREEMPT SMP [ 28.688088] Modules linked in: [ 28.688088] CPU: 0 PID: 878 Comm: kworker/0:2 Not tainted 3.17.0-vm+ #305 [ 28.688088] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 28.688088] Workqueue: ceph-msgr con_work [ 28.688088] task: ffff88011a7f9030 ti: ffff8800d903c000 task.ti: ffff8800d903c000 [ 28.688088] RIP: 0010:[<ffffffff81392b42>] [<ffffffff81392b42>] scatterwalk_pagedone+0x22/0x80 [ 28.688088] RSP: 0018:ffff8800d903f688 EFLAGS: 00010286 [ 28.688088] RAX: ffffeb04000032c0 RBX: ffff8800d903f718 RCX: ffffeb04000032c0 [ 28.688088] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8800d903f750 [ 28.688088] RBP: ffff8800d903f688 R08: 00000000000007de R09: ffff8800d903f880 [ 28.688088] R10: 18df467c72d6257b R11: 0000000000000000 R12: 0000000000000010 [ 28.688088] R13: ffff8800d903f750 R14: ffff8800d903f8a0 R15: 0000000000000000 [ 28.688088] FS: 00007f50a41c7700(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000 [ 28.688088] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 28.688088] CR2: ffffeb04000032c0 CR3: 00000000da3f3000 CR4: 00000000000006b0 [ 28.688088] Stack: [ 28.688088] ffff8800d903f698 ffffffff81392ca8 ffff8800d903f6e8 ffffffff81395d32 [ 28.688088] ffff8800dac96000 ffff880000000000 ffff8800d903f980 ffff880119b7e020 [ 28.688088] ffff880119b7e010 0000000000000000 0000000000000010 0000000000000010 [ 28.688088] Call Trace: [ 28.688088] [<ffffffff81392ca8>] scatterwalk_done+0x38/0x40 [ 28.688088] [<ffffffff81392ca8>] scatterwalk_done+0x38/0x40 [ 28.688088] [<ffffffff81395d32>] blkcipher_walk_done+0x182/0x220 [ 28.688088] [<ffffffff813990bf>] crypto_cbc_encrypt+0x15f/0x180 [ 28.688088] [<ffffffff81399780>] ? crypto_aes_set_key+0x30/0x30 [ 28.688088] [<ffffffff8156c40c>] ceph_aes_encrypt2+0x29c/0x2e0 [ 28.688088] [<ffffffff8156d2a3>] ceph_encrypt2+0x93/0xb0 [ 28.688088] [<ffffffff8156d7da>] ceph_x_encrypt+0x4a/0x60 [ 28.688088] [<ffffffff8155b39d>] ? ceph_buffer_new+0x5d/0xf0 [ 28.688088] [<ffffffff8156e837>] ceph_x_build_authorizer.isra.6+0x297/0x360 [ 28.688088] [<ffffffff8112089b>] ? kmem_cache_alloc_trace+0x11b/0x1c0 [ 28.688088] [<ffffffff8156b496>] ? ceph_auth_create_authorizer+0x36/0x80 [ 28.688088] [<ffffffff8156ed83>] ceph_x_create_authorizer+0x63/0xd0 [ 28.688088] [<ffffffff8156b4b4>] ceph_auth_create_authorizer+0x54/0x80 [ 28.688088] [<ffffffff8155f7c0>] get_authorizer+0x80/0xd0 [ 28.688088] [<ffffffff81555a8b>] prepare_write_connect+0x18b/0x2b0 [ 28.688088] [<ffffffff81559289>] try_read+0x1e59/0x1f10 This is because we set up crypto scatterlists as if all buffers were kmalloc'ed. Fix it. Signed-off-by: Ilya Dryomov <idryomov@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> 
commit aaef31703a0cf6a733e651885bfb49edc3ac6774 upstream.

Large (greater than 32k, the value of PAGE_ALLOC_COSTLY_ORDER) auth
tickets will have their buffers vmalloc'ed, which leads to the
following crash in crypto:

[   28.685082] BUG: unable to handle kernel paging request at ffffeb04000032c0
[   28.686032] IP: [<ffffffff81392b42>] scatterwalk_pagedone+0x22/0x80
[   28.686032] PGD 0
[   28.688088] Oops: 0000 [#1] PREEMPT SMP
[   28.688088] Modules linked in:
[   28.688088] CPU: 0 PID: 878 Comm: kworker/0:2 Not tainted 3.17.0-vm+ #305
[   28.688088] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[   28.688088] Workqueue: ceph-msgr con_work
[   28.688088] task: ffff88011a7f9030 ti: ffff8800d903c000 task.ti: ffff8800d903c000
[   28.688088] RIP: 0010:[<ffffffff81392b42>]  [<ffffffff81392b42>] scatterwalk_pagedone+0x22/0x80
[   28.688088] RSP: 0018:ffff8800d903f688  EFLAGS: 00010286
[   28.688088] RAX: ffffeb04000032c0 RBX: ffff8800d903f718 RCX: ffffeb04000032c0
[   28.688088] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8800d903f750
[   28.688088] RBP: ffff8800d903f688 R08: 00000000000007de R09: ffff8800d903f880
[   28.688088] R10: 18df467c72d6257b R11: 0000000000000000 R12: 0000000000000010
[   28.688088] R13: ffff8800d903f750 R14: ffff8800d903f8a0 R15: 0000000000000000
[   28.688088] FS:  00007f50a41c7700(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
[   28.688088] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   28.688088] CR2: ffffeb04000032c0 CR3: 00000000da3f3000 CR4: 00000000000006b0
[   28.688088] Stack:
[   28.688088]  ffff8800d903f698 ffffffff81392ca8 ffff8800d903f6e8 ffffffff81395d32
[   28.688088]  ffff8800dac96000 ffff880000000000 ffff8800d903f980 ffff880119b7e020
[   28.688088]  ffff880119b7e010 0000000000000000 0000000000000010 0000000000000010
[   28.688088] Call Trace:
[   28.688088]  [<ffffffff81392ca8>] scatterwalk_done+0x38/0x40
[   28.688088]  [<ffffffff81392ca8>] scatterwalk_done+0x38/0x40
[   28.688088]  [<ffffffff81395d32>] blkcipher_walk_done+0x182/0x220
[   28.688088]  [<ffffffff813990bf>] crypto_cbc_encrypt+0x15f/0x180
[   28.688088]  [<ffffffff81399780>] ? crypto_aes_set_key+0x30/0x30
[   28.688088]  [<ffffffff8156c40c>] ceph_aes_encrypt2+0x29c/0x2e0
[   28.688088]  [<ffffffff8156d2a3>] ceph_encrypt2+0x93/0xb0
[   28.688088]  [<ffffffff8156d7da>] ceph_x_encrypt+0x4a/0x60
[   28.688088]  [<ffffffff8155b39d>] ? ceph_buffer_new+0x5d/0xf0
[   28.688088]  [<ffffffff8156e837>] ceph_x_build_authorizer.isra.6+0x297/0x360
[   28.688088]  [<ffffffff8112089b>] ? kmem_cache_alloc_trace+0x11b/0x1c0
[   28.688088]  [<ffffffff8156b496>] ? ceph_auth_create_authorizer+0x36/0x80
[   28.688088]  [<ffffffff8156ed83>] ceph_x_create_authorizer+0x63/0xd0
[   28.688088]  [<ffffffff8156b4b4>] ceph_auth_create_authorizer+0x54/0x80
[   28.688088]  [<ffffffff8155f7c0>] get_authorizer+0x80/0xd0
[   28.688088]  [<ffffffff81555a8b>] prepare_write_connect+0x18b/0x2b0
[   28.688088]  [<ffffffff81559289>] try_read+0x1e59/0x1f10

This is because we set up crypto scatterlists as if all buffers were
kmalloc'ed.  Fix it.

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
net: Remove casts of void * 2011-06-17T03:19:27+00:00 Joe Perches joe@perches.com 2011-06-13T16:21:26+00:00 ea110733874d5176cb56dcf612a629ffac09dbf0 Unnecessary casts of void * clutter the code. These are the remainder casts after several specific patches to remove netdev_priv and dev_priv. Done via coccinelle script: $ cat cast_void_pointer.cocci @@ type T; T *pt; void *pv; @@ - pt = (T *)pv; + pt = pv; Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@conan.davemloft.net> 
Unnecessary casts of void * clutter the code.

These are the remainder casts after several specific
patches to remove netdev_priv and dev_priv.

Done via coccinelle script:

$ cat cast_void_pointer.cocci
@@
type T;
T *pt;
void *pv;
@@

- pt = (T *)pv;
+ pt = pv;

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>
libceph: Create a new key type "ceph". 2011-03-29T19:11:24+00:00 Tommi Virtanen tommi.virtanen@dreamhost.com 2011-03-28T21:59:38+00:00 4b2a58abd1e17c0ee53c8dded879e015917cca67 This allows us to use existence of the key type as a feature test, from userspace. Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com> Signed-off-by: Sage Weil <sage@newdream.net> 
This allows us to use existence of the key type as a feature test,
from userspace.

Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
ceph: Move secret key parsing earlier. 2011-03-29T19:11:16+00:00 Tommi Virtanen tommi.virtanen@dreamhost.com 2011-03-25T23:32:57+00:00 8323c3aa74cd92465350294567142d12ffdcc963 This makes the base64 logic be contained in mount option parsing, and prepares us for replacing the homebew key management with the kernel key retention service. Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com> Signed-off-by: Sage Weil <sage@newdream.net> 
This makes the base64 logic be contained in mount option parsing,
and prepares us for replacing the homebew key management with the
kernel key retention service.

Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
ceph: factor out libceph from Ceph file system 2010-10-20T22:37:28+00:00 Yehuda Sadeh yehuda@hq.newdream.net 2010-04-06T22:14:15+00:00 3d14c5d2b6e15c21d8e5467dc62d33127c23a644 This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net> 
This factors out protocol and low-level storage parts of ceph into a
separate libceph module living in net/ceph and include/linux/ceph.  This
is mostly a matter of moving files around.  However, a few key pieces
of the interface change as well:

 - ceph_client becomes ceph_fs_client and ceph_client, where the latter
   captures the mon and osd clients, and the fs_client gets the mds client
   and file system specific pieces.
 - Mount option parsing and debugfs setup is correspondingly broken into
   two pieces.
 - The mon client gets a generic handler callback for otherwise unknown
   messages (mds map, in this case).
 - The basic supported/required feature bits can be expanded (and are by
   ceph_fs_client).

No functional change, aside from some subtle error handling cases that got
cleaned up in the refactoring process.

Signed-off-by: Sage Weil <sage@newdream.net>