| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26695: crypto: ccp - Fix null pointer dereference in __sev_platform_shutdown_locked |
| |
| Description |
| =========== |
| |
| 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+0x10/0x10 |
| [ 137.182693] ret_from_fork_asm+0x1b/0x30 |
| [ 137.182693] </TASK> |
| [ 137.182693] Modules linked in: |
| [ 137.538483] ---[ end trace 0000000000000000 ]--- |
| |
| The Linux kernel CVE team has assigned CVE-2024-26695 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10.137 with commit 87af9b0b45666ca3dd6b10c0ece691c740b0f750 and fixed in 5.10.210 with commit 58054faf3bd29cd0b949b77efcb6157f66f401ed |
| Issue introduced in 5.15.61 with commit f831d2882c843d44100016aeb4332e9c4b560805 and fixed in 5.15.149 with commit 7535ec350a5f09b5756a7607f5582913f21200f4 |
| Issue introduced in 6.0 with commit 1b05ece0c931536c0a38a9385e243a7962e933f6 and fixed in 6.1.79 with commit 8731fe001a60581794ed9cf65da8cd304846a6fb |
| Issue introduced in 6.0 with commit 1b05ece0c931536c0a38a9385e243a7962e933f6 and fixed in 6.6.18 with commit 88aa493f393d2ee38ac140e1f6ac1881346e85d4 |
| Issue introduced in 6.0 with commit 1b05ece0c931536c0a38a9385e243a7962e933f6 and fixed in 6.7.6 with commit b5909f197f3b26aebedca7d8ac7b688fd993a266 |
| Issue introduced in 6.0 with commit 1b05ece0c931536c0a38a9385e243a7962e933f6 and fixed in 6.8 with commit ccb88e9549e7cfd8bcd511c538f437e20026e983 |
| Issue introduced in 5.18.18 with commit fcb04178c05b88a98921e262da9f7cb21cfff118 |
| Issue introduced in 5.19.2 with commit d87bbd10fc01b52c814113643f2707d2d10b0319 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-26695 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/crypto/ccp/sev-dev.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/58054faf3bd29cd0b949b77efcb6157f66f401ed |
| https://git.kernel.org/stable/c/7535ec350a5f09b5756a7607f5582913f21200f4 |
| https://git.kernel.org/stable/c/8731fe001a60581794ed9cf65da8cd304846a6fb |
| https://git.kernel.org/stable/c/88aa493f393d2ee38ac140e1f6ac1881346e85d4 |
| https://git.kernel.org/stable/c/b5909f197f3b26aebedca7d8ac7b688fd993a266 |
| https://git.kernel.org/stable/c/ccb88e9549e7cfd8bcd511c538f437e20026e983 |
