5.15-stable patches

added patches:
	kdb-do-not-assume-write-callback-available.patch
	x86-static-call-remove-early_boot_irqs_disabled-check-to-fix-xen-pvh-dom0.patch

diff --git a/queue-5.15/kdb-do-not-assume-write-callback-available.patch b/queue-5.15/kdb-do-not-assume-write-callback-available.patch
new file mode 100644 (file)
index 0000000..f5c9c27
--- /dev/null
+++ b/queue-5.15/kdb-do-not-assume-write-callback-available.patch
@@ -0,0 +1,39 @@
+From 6d3e0d8cc63221dec670d0ee92ac57961581e975 Mon Sep 17 00:00:00 2001
+From: John Ogness <john.ogness@linutronix.de>
+Date: Mon, 17 Jul 2023 21:52:01 +0206
+Subject: kdb: Do not assume write() callback available
+
+From: John Ogness <john.ogness@linutronix.de>
+
+commit 6d3e0d8cc63221dec670d0ee92ac57961581e975 upstream.
+
+It is allowed for consoles to not provide a write() callback. For
+example ttynull does this.
+
+Check if a write() callback is available before using it.
+
+Signed-off-by: John Ogness <john.ogness@linutronix.de>
+Reviewed-by: Petr Mladek <pmladek@suse.com>
+Reviewed-by: Douglas Anderson <dianders@chromium.org>
+Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
+Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
+Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
+Signed-off-by: Petr Mladek <pmladek@suse.com>
+Link: https://lore.kernel.org/r/20230717194607.145135-2-john.ogness@linutronix.de
+Cc: Brian Norris <briannorris@chromium.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ kernel/debug/kdb/kdb_io.c |    2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/kernel/debug/kdb/kdb_io.c
++++ b/kernel/debug/kdb/kdb_io.c
+@@ -577,6 +577,8 @@ static void kdb_msg_write(const char *ms
+                       continue;
+               if (c == dbg_io_ops->cons)
+                       continue;
++              if (!c->write)
++                      continue;
+               /*
+                * Set oops_in_progress to encourage the console drivers to
+                * disregard their internal spin locks: in the current calling

diff --git a/queue-5.15/series b/queue-5.15/series
index 049ffec72b833e866f6bb2e49cba07e529ede5e2..7d21f29af32b4e9ef53ce919f4c563a332b69859 100644 (file)
--- a/queue-5.15/series
+++ b/queue-5.15/series
@@ -414,3 +414,5 @@ ipv6-mcast-add-rcu-protection-to-mld_newpack.patch
 drm-tidss-fix-issue-in-irq-handling-causing-irq-flood-issue.patch
 drm-tidss-clear-the-interrupt-status-for-interrupts-being-disabled.patch
 drm-v3d-stop-active-perfmon-if-it-is-being-destroyed.patch
+kdb-do-not-assume-write-callback-available.patch
+x86-static-call-remove-early_boot_irqs_disabled-check-to-fix-xen-pvh-dom0.patch

diff --git a/queue-5.15/x86-static-call-remove-early_boot_irqs_disabled-check-to-fix-xen-pvh-dom0.patch b/queue-5.15/x86-static-call-remove-early_boot_irqs_disabled-check-to-fix-xen-pvh-dom0.patch
new file mode 100644 (file)
index 0000000..98dd5d7
--- /dev/null
+++ b/queue-5.15/x86-static-call-remove-early_boot_irqs_disabled-check-to-fix-xen-pvh-dom0.patch
@@ -0,0 +1,44 @@
+From 5cc2db37124bb33914996d6fdbb2ddb3811f2945 Mon Sep 17 00:00:00 2001
+From: Andrew Cooper <andrew.cooper3@citrix.com>
+Date: Sat, 21 Dec 2024 21:10:46 +0000
+Subject: x86/static-call: Remove early_boot_irqs_disabled check to fix Xen PVH dom0
+
+From: Andrew Cooper <andrew.cooper3@citrix.com>
+
+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>
+---
+ arch/x86/kernel/static_call.c |    1 -
+ 1 file changed, 1 deletion(-)
+
+--- a/arch/x86/kernel/static_call.c
++++ b/arch/x86/kernel/static_call.c
+@@ -169,7 +169,6 @@ EXPORT_SYMBOL_GPL(arch_static_call_trans
+ noinstr void __static_call_update_early(void *tramp, void *func)
+ {
+       BUG_ON(system_state != SYSTEM_BOOTING);
+-      BUG_ON(!early_boot_irqs_disabled);
+       BUG_ON(static_call_initialized);
+       __text_gen_insn(tramp, JMP32_INSN_OPCODE, tramp, func, JMP32_INSN_SIZE);
+       sync_core();