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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2025-03-27 19:05:02 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-10 14:37:41 +0200 |
| commit | 763f4d638f71cb45235395790a46e9f9e84227fd (patch) | |
| tree | f73e26f15296ed1f3b9e769b89b4427d19ccd21b | |
| parent | 10edc4cecad4b61613a4daa9bd29500294c9b109 (diff) | |
| download | linux-763f4d638f71cb45235395790a46e9f9e84227fd.tar.gz linux-763f4d638f71cb45235395790a46e9f9e84227fd.tar.bz2 linux-763f4d638f71cb45235395790a46e9f9e84227fd.zip | |
x86/microcode/AMD: Fix __apply_microcode_amd()'s return value
commit 31ab12df723543047c3fc19cb8f8c4498ec6267f upstream.
When verify_sha256_digest() fails, __apply_microcode_amd() should propagate
the failure by returning false (and not -1 which is promoted to true).
Fixes: 50cef76d5cb0 ("x86/microcode/AMD: Load only SHA256-checksummed patches")
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250327230503.1850368-2-boris.ostrovsky@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/amd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index c683e8dedfee..0ee172ce2d21 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -603,7 +603,7 @@ static bool __apply_microcode_amd(struct microcode_amd *mc, u32 *cur_rev, unsigned long p_addr = (unsigned long)&mc->hdr.data_code; if (!verify_sha256_digest(mc->hdr.patch_id, *cur_rev, (const u8 *)p_addr, psize)) - return -1; + return false; native_wrmsrl(MSR_AMD64_PATCH_LOADER, p_addr); |