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| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2025-07-21 18:11:54 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-28 16:34:42 +0200 |
| commit | 7d06af2fa25b41ecd9f470c3d2a8ff3757bae637 (patch) | |
| tree | c32ccf505d0fbb510bc7c3c615e85b390e4d2402 /rust/kernel/alloc.rs | |
| parent | 29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e (diff) | |
x86/CPU/AMD: Ignore invalid reset reason value
commit e9576e078220c50ace9e9087355423de23e25fa5 upstream.
The reset reason value may be "all bits set", e.g. 0xFFFFFFFF. This is a
commonly used error response from hardware. This may occur due to a real
hardware issue or when running in a VM.
The user will see all reset reasons reported in this case.
Check for an error response value and return early to avoid decoding
invalid data.
Also, adjust the data variable type to match the hardware register size.
Fixes: ab8131028710 ("x86/CPU/AMD: Print the reason for the last reset")
Reported-by: Libing He <libhe@redhat.com>
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/20250721181155.3536023-1-yazen.ghannam@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'rust/kernel/alloc.rs')
0 files changed, 0 insertions, 0 deletions