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Mario Limonciello (AMD) d473b06773 crypto: ccp - Send PSP_CMD_TEE_RING_DESTROY when PSP_CMD_TEE_RING_INIT fails 
[ Upstream commit 7b85137caf ]

The hibernate resume sequence involves loading a resume kernel that is just
used for loading the hibernate image before shifting back to the existing
kernel.

During that hibernate resume sequence the resume kernel may have loaded
the ccp driver.  If this happens the resume kernel will also have called
PSP_CMD_TEE_RING_INIT but it will never have called
PSP_CMD_TEE_RING_DESTROY.

This is problematic because the existing kernel needs to re-initialize the
ring.  One could argue that the existing kernel should call destroy
as part of restore() but there is no guarantee that the resume kernel did
or didn't load the ccp driver.  There is also no callback opportunity for
the resume kernel to destroy before handing back control to the existing
kernel.

Similar problems could potentially exist with the use of kdump and
crash handling. I actually reproduced this issue like this:

1) rmmod ccp
2) hibernate the system
3) resume the system
4) modprobe ccp

The resume kernel will have loaded ccp but never destroyed and then when
I try to modprobe it fails.

Because of these possible cases add a flow that checks the error code from
the PSP_CMD_TEE_RING_INIT call and tries to call PSP_CMD_TEE_RING_DESTROY
if it failed.  If this succeeds then call PSP_CMD_TEE_RING_INIT again.

Fixes: f892a21f51 ("crypto: ccp - use generic power management")
Reported-by: Lars Francke <lars.francke@gmail.com>
Closes: https://lore.kernel.org/platform-driver-x86/CAD-Ua_gfJnQSo8ucS_7ZwzuhoBRJ14zXP7s8b-zX3ZcxcyWePw@mail.gmail.com/
Tested-by: Yijun Shen <Yijun.Shen@Dell.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20260116041132.153674-6-superm1@kernel.org
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:20:20 -05:00
arch arm64: dts: qcom: sm6115: Add CX_MEM/DBGC GPU regions 2026-03-04 07:19:47 -05:00
block block: add a bio_add_virt_nofail helper 2026-03-04 07:19:26 -05:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-01-30 10:28:39 +01:00
Documentation Documentation: tracing: Add PCI tracepoint documentation 2026-03-04 07:19:59 -05:00
drivers crypto: ccp - Send PSP_CMD_TEE_RING_DESTROY when PSP_CMD_TEE_RING_INIT fails 2026-03-04 07:20:20 -05:00
fs smb: client: correct value for smbd_max_fragmented_recv_size 2026-03-04 07:20:11 -05:00
include crypto: ccp - Send PSP_CMD_TEE_RING_DESTROY when PSP_CMD_TEE_RING_INIT fails 2026-03-04 07:20:20 -05:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:33:50 +02:00
io_uring io_uring/sync: validate passed in offset 2026-03-04 07:19:28 -05:00
ipc ipc: don't audit capability check in ipc_permissions() 2026-03-04 07:20:07 -05:00
kernel ucount: check for CAP_SYS_RESOURCE using ns_capable_noaudit() 2026-03-04 07:20:08 -05:00
lib procfs: avoid fetching build ID while holding VMA lock 2026-02-11 13:40:18 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather 2026-02-19 16:29:55 +01:00
net xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path 2026-03-04 07:20:12 -05:00
rust rust: rbtree: fix documentation typo in CursorMut peek_next method 2026-02-06 16:55:44 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:14:50 +01:00
scripts scripts: generate_rust_analyzer: Add compiler_builtins -> core dep 2026-02-06 16:55:47 +01:00
security evm: Use ordered xattrs list to calculate HMAC in evm_init_hmac() 2026-03-04 07:19:56 -05:00
sound ASoC: nau8821: Fixup nau8821_enable_jack_detect() 2026-03-04 07:19:52 -05:00
tools tools/power/x86/intel-speed-select: Fix file descriptor leak in isolate_cpus() 2026-03-04 07:20:18 -05:00
usr kbuild: uapi: Strip comments before size type check 2025-11-13 15:34:35 -05:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:40:17 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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 rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.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: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
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 gpiolib-acpi: Update file references in the Documentation and MAINTAINERS 2026-02-11 13:40:29 +01:00
Makefile Linux 6.12.74 2026-02-19 16:29:56 +01:00
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.