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David Howells 94efe72f76 [PATCH] Destruction of failed keyring oopses ... The attached patch makes sure that a keyring that failed to instantiate properly is destroyed without oopsing [CAN-2005-2099]. The problem occurs in three stages: (1) The key allocator initialises the type-specific data to all zeroes. In the case of a keyring, this will become a link in the keyring name list when the keyring is instantiated. (2) If a user (any user) attempts to add a keyring with anything other than an empty payload, the keyring instantiation function will fail with an error and won't add the keyring to the name list. (3) The keyring's destructor then sees that the keyring has a description (name) and tries to remove the keyring from the name list, which oopses because the link pointers are both zero. This bug permits any user to take down a box trivially. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
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Makefile	…
compat.c	…
internal.h	…
key.c	…
keyctl.c	…
keyring.c	[PATCH] Destruction of failed keyring oopses	20 years ago
proc.c	…
process_keys.c	[PATCH] Error during attempt to join key management session can leave semaphore pinned	20 years ago
request_key.c	…
request_key_auth.c	…
user_defined.c	…