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Kim Phillips 468e329577 crypto: ccp - Fix null pointer dereference in __sev_snp_shutdown_locked 
Fix a null pointer dereference induced by DEBUG_TEST_DRIVER_REMOVE.
Return from __sev_snp_shutdown_locked() if the psp_device or the
sev_device structs are not initialized. Without the fix, the driver will
produce the following splat:

   ccp 0000:55:00.5: enabling device (0000 -> 0002)
   ccp 0000:55:00.5: sev enabled
   ccp 0000:55:00.5: psp enabled
   BUG: kernel NULL pointer dereference, address: 00000000000000f0
   #PF: supervisor read access in kernel mode
   #PF: error_code(0x0000) - not-present page
   PGD 0 P4D 0
   Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI
   CPU: 262 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1+ #29
   RIP: 0010:__sev_snp_shutdown_locked+0x2e/0x150
   Code: 00 55 48 89 e5 41 57 41 56 41 54 53 48 83 ec 10 41 89 f7 49 89 fe 65 48 8b 04 25 28 00 00 00 48 89 45 d8 48 8b 05 6a 5a 7f 06 <4c> 8b a0 f0 00 00 00 41 0f b6 9c 24 a2 00 00 00 48 83 fb 02 0f 83
   RSP: 0018:ffffb2ea4014b7b8 EFLAGS: 00010286
   RAX: 0000000000000000 RBX: ffff9e4acd2e0a28 RCX: 0000000000000000
   RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffb2ea4014b808
   RBP: ffffb2ea4014b7e8 R08: 0000000000000106 R09: 000000000003d9c0
   R10: 0000000000000001 R11: ffffffffa39ff070 R12: ffff9e49d40590c8
   R13: 0000000000000000 R14: ffffb2ea4014b808 R15: 0000000000000000
   FS:  0000000000000000(0000) GS:ffff9e58b1e00000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: 00000000000000f0 CR3: 0000000418a3e001 CR4: 0000000000770ef0
   PKRU: 55555554
   Call Trace:
    <TASK>
    ? __die_body+0x6f/0xb0
    ? __die+0xcc/0xf0
    ? page_fault_oops+0x330/0x3a0
    ? save_trace+0x2a5/0x360
    ? do_user_addr_fault+0x583/0x630
    ? exc_page_fault+0x81/0x120
    ? asm_exc_page_fault+0x2b/0x30
    ? __sev_snp_shutdown_locked+0x2e/0x150
    __sev_firmware_shutdown+0x349/0x5b0
    ? pm_runtime_barrier+0x66/0xe0
    sev_dev_destroy+0x34/0xb0
    psp_dev_destroy+0x27/0x60
    sp_destroy+0x39/0x90
    sp_pci_remove+0x22/0x60
    pci_device_remove+0x4e/0x110
    really_probe+0x271/0x4e0
    __driver_probe_device+0x8f/0x160
    driver_probe_device+0x24/0x120
    __driver_attach+0xc7/0x280
    ? driver_attach+0x30/0x30
    bus_for_each_dev+0x10d/0x130
    driver_attach+0x22/0x30
    bus_add_driver+0x171/0x2b0
    ? unaccepted_memory_init_kdump+0x20/0x20
    driver_register+0x67/0x100
    __pci_register_driver+0x83/0x90
    sp_pci_init+0x22/0x30
    sp_mod_init+0x13/0x30
    do_one_initcall+0xb8/0x290
    ? sched_clock_noinstr+0xd/0x10
    ? local_clock_noinstr+0x3e/0x100
    ? stack_depot_save_flags+0x21e/0x6a0
    ? local_clock+0x1c/0x60
    ? stack_depot_save_flags+0x21e/0x6a0
    ? sched_clock_noinstr+0xd/0x10
    ? local_clock_noinstr+0x3e/0x100
    ? __lock_acquire+0xd90/0xe30
    ? sched_clock_noinstr+0xd/0x10
    ? local_clock_noinstr+0x3e/0x100
    ? __create_object+0x66/0x100
    ? local_clock+0x1c/0x60
    ? __create_object+0x66/0x100
    ? parameq+0x1b/0x90
    ? parse_one+0x6d/0x1d0
    ? parse_args+0xd7/0x1f0
    ? do_initcall_level+0x180/0x180
    do_initcall_level+0xb0/0x180
    do_initcalls+0x60/0xa0
    ? kernel_init+0x1f/0x1d0
    do_basic_setup+0x41/0x50
    kernel_init_freeable+0x1ac/0x230
    ? rest_init+0x1f0/0x1f0
    kernel_init+0x1f/0x1d0
    ? rest_init+0x1f0/0x1f0
    ret_from_fork+0x3d/0x50
    ? rest_init+0x1f0/0x1f0
    ret_from_fork_asm+0x11/0x20
    </TASK>
   Modules linked in:
   CR2: 00000000000000f0
   ---[ end trace 0000000000000000 ]---
   RIP: 0010:__sev_snp_shutdown_locked+0x2e/0x150
   Code: 00 55 48 89 e5 41 57 41 56 41 54 53 48 83 ec 10 41 89 f7 49 89 fe 65 48 8b 04 25 28 00 00 00 48 89 45 d8 48 8b 05 6a 5a 7f 06 <4c> 8b a0 f0 00 00 00 41 0f b6 9c 24 a2 00 00 00 48 83 fb 02 0f 83
   RSP: 0018:ffffb2ea4014b7b8 EFLAGS: 00010286
   RAX: 0000000000000000 RBX: ffff9e4acd2e0a28 RCX: 0000000000000000
   RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffb2ea4014b808
   RBP: ffffb2ea4014b7e8 R08: 0000000000000106 R09: 000000000003d9c0
   R10: 0000000000000001 R11: ffffffffa39ff070 R12: ffff9e49d40590c8
   R13: 0000000000000000 R14: ffffb2ea4014b808 R15: 0000000000000000
   FS:  0000000000000000(0000) GS:ffff9e58b1e00000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: 00000000000000f0 CR3: 0000000418a3e001 CR4: 0000000000770ef0
   PKRU: 55555554
   Kernel panic - not syncing: Fatal exception
   Kernel Offset: 0x1fc00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

Fixes: 1ca5614b84 ("crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP")
Cc: stable@vger.kernel.org
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: John Allen <john.allen@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
History 2024-06-16 13:41:53 +08:00
arch crypto: x86/aes-gcm - rewrite the AES-NI optimized AES-GCM 2024-06-07 19:47:58 +08:00
block block-6.10-20240523 2024-05-23 13:44:47 -07:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto crypto: sm2 - Remove sm2 algorithm 2024-06-07 19:46:39 +08:00
Documentation 16 hotfixes, 11 of which are cc:stable. 2024-05-25 15:10:33 -07:00
drivers crypto: ccp - Fix null pointer dereference in __sev_snp_shutdown_locked 2024-06-16 13:41:53 +08:00
fs four smb client fixes, including two important netfs integration fixes 2024-05-25 22:33:10 -07:00
include crypto: sm2 - Remove sm2 algorithm 2024-06-07 19:46:39 +08:00
init Driver core changes for 6.10-rc1 2024-05-22 12:13:40 -07:00
io_uring io_uring-6.10-20240523 2024-05-23 13:41:49 -07:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel Misc fixes: 2024-05-25 14:48:40 -07:00
lib crypto: lib - add missing MODULE_DESCRIPTION() macros 2024-06-07 19:46:39 +08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm 16 hotfixes, 11 of which are cc:stable. 2024-05-25 15:10:33 -07:00
net NFS client updates for Linux 6.10 2024-05-23 13:51:09 -07:00
rust LoongArch changes for v6.10 2024-05-22 09:43:07 -07:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts - A series ("kbuild: enable more warnings by default") from Arnd 2024-05-22 18:59:29 -07:00
security crypto: sm2 - Remove sm2 algorithm 2024-06-07 19:46:39 +08:00
sound sound fixes for 6.10-rc1 2024-05-24 08:48:51 -07:00
tools Revert a patch causing a regression as described in the cset: 2024-05-26 09:54:26 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.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: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap mailmap: update email address for Satya Priya 2024-05-24 11:55:05 -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: Drop Gustavo Pimentel as PCI DWC Maintainer 2024-03-27 13:41:02 -05:00
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 crypto: ccp - Move security attributes to their own file 2024-06-07 19:46:39 +08:00
Makefile Linux 6.10-rc1 2024-05-26 15:20:12 -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.