diff options
| author |   David Howells <dhowells@redhat.com> | 2005-08-04 13:07:06 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-04 13:11:14 -0700 |
| commit | bcf945d36fa0598f41ac4ad46a9dc43135460263 (patch) | |
| tree | 7a2aa188442bf863f20055a001baf85143d7a5b9 /security/keys/keyring.c | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-for-linus-2.6 (diff) | |
| download | linux-dev-bcf945d36fa0598f41ac4ad46a9dc43135460263.tar.xz linux-dev-bcf945d36fa0598f41ac4ad46a9dc43135460263.zip | |
[PATCH] Error during attempt to join key management session can leave semaphore pinned
The attached patch prevents an error during the key session joining operation
from hanging future joins in the D state [CAN-2005-2098].
The problem is that the error handling path for the KEYCTL_JOIN_SESSION_KEYRING
operation has one error path that doesn't release the session management
semaphore. Further attempts to get the semaphore will then sleep for ever in
the D state.
This can happen in four situations, all involving an attempt to allocate a new
session keyring:
(1) ENOMEM.
(2) The users key quota being reached.
(3) A keyring name that is an empty string.
(4) A keyring name that is too long.
Any user may attempt this operation, and so any user can cause the problem to
occur.
Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security/keys/keyring.c')
0 files changed, 0 insertions, 0 deletions