CVE-2024-26695

In the Linux kernel, the following vulnerability has been resolved: crypto:
ccp - Fix null pointer dereference in __sev_platform_shutdown_locked The
SEV platform device can be shutdown with a null psp_master, e.g., using
DEBUG_TEST_DRIVER_REMOVE. Found using KASAN: [ 137.148210] ccp
0000:23:00.1: enabling device (0000 -> 0002) [ 137.162647] ccp
0000:23:00.1: no command queues available [ 137.170598] ccp 0000:23:00.1:
sev enabled [ 137.174645] ccp 0000:23:00.1: psp enabled [ 137.178890]
general protection fault, probably for non-canonical address
0xdffffc000000001e: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC KASAN NOPTI [
137.182693] KASAN: null-ptr-deref in range
[0x00000000000000f0-0x00000000000000f7] [ 137.182693] CPU: 93 PID: 1 Comm:
swapper/0 Not tainted 6.8.0-rc1+ #311 [ 137.182693] RIP:
0010:__sev_platform_shutdown_locked+0x51/0x180 [ 137.182693] Code: 08 80 3c
08 00 0f 85 0e 01 00 00 48 8b 1d 67 b6 01 08 48 b8 00 00 00 00 00 fc ff df
48 8d bb f0 00 00 00 48 89 f9 48 c1 e9 03 <80> 3c 01 00 0f 85 fe 00 00 00
48 8b 9b f0 00 00 00 48 85 db 74 2c [ 137.182693] RSP:
0018:ffffc900000cf9b0 EFLAGS: 00010216 [ 137.182693] RAX: dffffc0000000000
RBX: 0000000000000000 RCX: 000000000000001e [ 137.182693] RDX:
0000000000000000 RSI: 0000000000000008 RDI: 00000000000000f0 [ 137.182693]
RBP: ffffc900000cf9c8 R08: 0000000000000000 R09: fffffbfff58f5a66 [
137.182693] R10: ffffc900000cf9c8 R11: ffffffffac7ad32f R12:
ffff8881e5052c28 [ 137.182693] R13: ffff8881e5052c28 R14: ffff8881758e43e8
R15: ffffffffac64abf8 [ 137.182693] FS: 0000000000000000(0000)
GS:ffff889de7000000(0000) knlGS:0000000000000000 [ 137.182693] CS: 0010 DS:
0000 ES: 0000 CR0: 0000000080050033 [ 137.182693] CR2: 0000000000000000
CR3: 0000001cf7c7e000 CR4: 0000000000350ef0 [ 137.182693] Call Trace: [
137.182693] <TASK> [ 137.182693] ? show_regs+0x6c/0x80 [ 137.182693] ?
__die_body+0x24/0x70 [ 137.182693] ? die_addr+0x4b/0x80 [ 137.182693] ?
exc_general_protection+0x126/0x230 [ 137.182693] ?
asm_exc_general_protection+0x2b/0x30 [ 137.182693] ?
__sev_platform_shutdown_locked+0x51/0x180 [ 137.182693]
sev_firmware_shutdown.isra.0+0x1e/0x80 [ 137.182693]
sev_dev_destroy+0x49/0x100 [ 137.182693] psp_dev_destroy+0x47/0xb0 [
137.182693] sp_destroy+0xbb/0x240 [ 137.182693] sp_pci_remove+0x45/0x60 [
137.182693] pci_device_remove+0xaa/0x1d0 [ 137.182693]
device_remove+0xc7/0x170 [ 137.182693] really_probe+0x374/0xbe0 [
137.182693] ? srso_return_thunk+0x5/0x5f [ 137.182693]
__driver_probe_device+0x199/0x460 [ 137.182693]
driver_probe_device+0x4e/0xd0 [ 137.182693] __driver_attach+0x191/0x3d0 [
137.182693] ? __pfx___driver_attach+0x10/0x10 [ 137.182693]
bus_for_each_dev+0x100/0x190 [ 137.182693] ?
__pfx_bus_for_each_dev+0x10/0x10 [ 137.182693] ?
__kasan_check_read+0x15/0x20 [ 137.182693] ? srso_return_thunk+0x5/0x5f [
137.182693] ? _raw_spin_unlock+0x27/0x50 [ 137.182693]
driver_attach+0x41/0x60 [ 137.182693] bus_add_driver+0x2a8/0x580 [
137.182693] driver_register+0x141/0x480 [ 137.182693]
__pci_register_driver+0x1d6/0x2a0 [ 137.182693] ?
srso_return_thunk+0x5/0x5f [ 137.182693] ? esrt_sysfs_init+0x1cd/0x5d0 [
137.182693] ? __pfx_sp_mod_init+0x10/0x10 [ 137.182693]
sp_pci_init+0x22/0x30 [ 137.182693] sp_mod_init+0x14/0x30 [ 137.182693] ?
__pfx_sp_mod_init+0x10/0x10 [ 137.182693] do_one_initcall+0xd1/0x470 [
137.182693] ? __pfx_do_one_initcall+0x10/0x10 [ 137.182693] ?
parameq+0x80/0xf0 [ 137.182693] ? srso_return_thunk+0x5/0x5f [ 137.182693]
? __kmalloc+0x3b0/0x4e0 [ 137.182693] ? kernel_init_freeable+0x92d/0x1050 [
137.182693] ? kasan_populate_vmalloc_pte+0x171/0x190 [ 137.182693] ?
srso_return_thunk+0x5/0x5f [ 137.182693] kernel_init_freeable+0xa64/0x1050
[ 137.182693] ? __pfx_kernel_init+0x10/0x10 [ 137.182693]
kernel_init+0x24/0x160 [ 137.182693] ? __switch_to_asm+0x3e/0x70 [
137.182693] ret_from_fork+0x40/0x80 [ 137.182693] ? __pfx_kernel_init+0x1
—truncated—