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Lukas Wunner b358f23ab1 crypto: sig - Fix oops on KEYCTL_PKEY_QUERY for RSA keys 
Commit a2471684da ("crypto: ecdsa - Move X9.62 signature size
calculation into template") introduced ->max_size() and ->digest_size()
callbacks to struct sig_alg.  They return an algorithm's maximum
signature size and digest size, respectively.

For algorithms which lack these callbacks, crypto_register_sig() was
amended to use the ->key_size() callback instead.

However the commit neglected to also amend sig_register_instance().
As a result, the ->max_size() and ->digest_size() callbacks remain NULL
pointers if instances do not define them.  A KEYCTL_PKEY_QUERY system
call results in an oops for such instances:

  BUG: kernel NULL pointer dereference, address: 0000000000000000
  Call Trace:
  software_key_query+0x169/0x370
  query_asymmetric_key+0x67/0x90
  keyctl_pkey_query+0x86/0x120
  __do_sys_keyctl+0x428/0x480
  do_syscall_64+0x4b/0x110

The only instances affected by this are "pkcs1(rsa, ...)".

Fix by moving the callback checks from crypto_register_sig() to
sig_prepare_alg(), which is also invoked by sig_register_instance().
Change the return type of sig_prepare_alg() from void to int to be able
to return errors.  This matches other algorithm types, see e.g.
aead_prepare_alg() or ahash_prepare_alg().

Fixes: a2471684da ("crypto: ecdsa - Move X9.62 signature size calculation into template")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2024-10-26 14:41:59 +08:00
arch crypto: x86/crc32c - eliminate jump table and excessive unrolling 2024-10-26 14:41:59 +08:00
block for-6.12/block-20240925 2024-09-25 14:56:40 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: sig - Fix oops on KEYCTL_PKEY_QUERY for RSA keys 2024-10-26 14:41:59 +08:00
Documentation dt-bindings: imx-rng: Allow passing only "fsl,imx31-rnga" 2024-10-19 08:44:30 +08:00
drivers crypto: crypto4xx - use devm in probe 2024-10-19 08:44:30 +08:00
fs bcachefs fixes for 6.11-rc1 2024-09-29 09:17:44 -07:00
include crypto: hisilicon/qm - fix the coding specifications issue 2024-10-05 13:22:06 +08:00
init Rust changes for v6.12 2024-09-25 10:25:40 -07:00
io_uring for-6.12/io_uring-20240922 2024-09-24 11:11:38 -07:00
ipc struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
kernel Locking changes for v6.12: 2024-09-29 08:51:30 -07:00
lib crypto: lib/mpi - Fix an "Uninitialized scalar variable" issue 2024-10-05 13:22:05 +08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm 19 hotfixes. 13 are cc:stable. 2024-09-27 10:27:22 -07:00
net Three CephFS fixes from Xiubo and Luis and a bunch of assorted 2024-09-28 08:40:36 -07:00
rust Rust changes for v6.12 2024-09-25 10:25:40 -07:00
samples [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
scripts Reduce Coccinelle choices in string_choices.cocci 2024-09-28 21:33:11 +02:00
security crypto: rsassa-pkcs1 - Migrate to sig_alg backend 2024-10-05 13:22:04 +08:00
sound [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
tools linux_kselftest-next-6.12-rc1-fixes 2024-09-29 08:37:03 -07:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt x86: 2024-09-28 09:20:14 -07:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap Summary 2024-09-24 11:08:40 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Mark powerpc spufs as orphaned 2024-08-19 21:27:56 +10:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: Make Kristen Accardi the IAA crypto driver maintainer 2024-10-05 13:22:06 +08:00
Makefile Linux 6.12-rc1 2024-09-29 15:06:19 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.