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Apply patch to fix MCE rcu splat (rhbz 789644)

This commit is contained in:
Josh Boyer 2012-03-27 09:02:02 -04:00
parent 4721953b8b
commit 5d30d9525a
2 changed files with 25 additions and 1 deletions
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11
kernel.spec
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@ -54,7 +54,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 5
%global baserelease 6
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -756,6 +756,9 @@ Patch21233: jbd2-clear-BH_Delay-and-BH_Unwritten-in-journal_unmap_buf.patch
#rhbz 754518
#Patch21235: scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
#rhbz 789644
Patch21237: mcelog-rcu-splat.patch
#rhbz 727865 730007
Patch21240: ACPICA-Fix-regression-in-FADT-revision-checks.patch
@ -1419,6 +1422,9 @@ ApplyPatch jbd2-clear-BH_Delay-and-BH_Unwritten-in-journal_unmap_buf.patch
#rhbz 754518
#ApplyPatch scsi-sd_revalidate_disk-prevent-NULL-ptr-deref.patch
#rhbz 789644
ApplyPatch mcelog-rcu-splat.patch
#rhbz 727865 730007
ApplyPatch ACPICA-Fix-regression-in-FADT-revision-checks.patch
@ -2178,6 +2184,9 @@ fi
# and build.
%changelog
* Tue Mar 27 2012 Josh Boyer <jwboyer@redhat.com>
- Apply patch to fix MCE rcu splat (rhbz 789644)
* Fri Mar 23 2012 Dave Jones <davej@redhat.com>
- Apply patches that should solve the bluetooth use-after-free oopses. (rhbz 806033)

15
mcelog-rcu-splat.patch Normal file
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@ -0,0 +1,15 @@
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index f22a9f7..f525f99 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -191,7 +191,7 @@ static void drain_mcelog_buffer(void)
{
unsigned int next, i, prev = 0;
- next = rcu_dereference_check_mce(mcelog.next);
+ next = ACCESS_ONCE(mcelog.next);
do {
struct mce *m;