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| author | Andrew Cooper <andrew.cooper3@citrix.com> | 2024-12-22 00:10:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-21 16:01:46 +0300 |
| commit | 728dd20c8df74e09a9f34872b26d962a0f31d529 (patch) | |
| tree | e46c0cb2d19d3c05a11b4e415ef2e8f373a51163 /scripts/generate_rust_analyzer.py | |
| parent | 0df35b26dcd238ac91e86c3b2bd7d1126b5b694d (diff) | |
| download | linux-728dd20c8df74e09a9f34872b26d962a0f31d529.tar.xz | |
x86/static-call: Remove early_boot_irqs_disabled check to fix Xen PVH dom0
commit 5cc2db37124bb33914996d6fdbb2ddb3811f2945 upstream.
__static_call_update_early() has a check for early_boot_irqs_disabled, but
is used before early_boot_irqs_disabled is set up in start_kernel().
Xen PV has always special cased early_boot_irqs_disabled, but Xen PVH does
not and falls over the BUG when booting as dom0.
It is very suspect that early_boot_irqs_disabled starts as 0, becomes 1 for
a time, then becomes 0 again, but as this needs backporting to fix a
breakage in a security fix, dropping the BUG_ON() is the far safer option.
Fixes: 0ef8047b737d ("x86/static-call: provide a way to do very early static-call updates")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219620
Reported-by: Alex Zenla <alex@edera.dev>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Alex Zenla <alex@edera.dev>
Link: https://lore.kernel.org/r/20241221211046.6475-1-andrew.cooper3@citrix.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions