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| author | Venkatesh Pallipadi <venki@google.com> | 2010-06-11 02:45:01 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-06-11 23:12:22 +0200 |
| commit | 6a4f3b523779b67e7d560ed42652f8a59f2f9782 (patch) | |
| tree | fc2fa0a0b76187261cf89c174f58bb1d10f68d14 /arch | |
| parent | um, hweight: Fix UML boot crash due to x86 optimized hweight (diff) | |
| download | linux-6a4f3b523779b67e7d560ed42652f8a59f2f9782.tar.xz linux-6a4f3b523779b67e7d560ed42652f8a59f2f9782.zip | |
x86, pat: Proper init of memtype subtree_max_end
subtree_max_end that was recently added to struct memtype was not getting
properly initialized resulting in
WARNING: kmemcheck: Caught 64-bit read from uninitialized memory
in memtype_rb_augment_cb()
reported here
https://bugzilla.kernel.org/show_bug.cgi?id=16092
This change fixes the problem.
Reported-by: Christian Casteyde <casteyde.christian@free.fr>
Tested-by: Christian Casteyde <casteyde.christian@free.fr>
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
LKML-Reference: <1276217101-11515-1-git-send-email-venki@google.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/pat.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/pat_rbtree.c | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index acc15b23b743..64121a18b8cb 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -302,7 +302,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type, return -EINVAL; } - new = kmalloc(sizeof(struct memtype), GFP_KERNEL); + new = kzalloc(sizeof(struct memtype), GFP_KERNEL); if (!new) return -ENOMEM; diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c index f537087bb740..f20eeec85a86 100644 --- a/arch/x86/mm/pat_rbtree.c +++ b/arch/x86/mm/pat_rbtree.c @@ -226,6 +226,7 @@ int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type) if (ret_type) new->type = *ret_type; + new->subtree_max_end = new->end; memtype_rb_insert(&memtype_rbroot, new); } return err; |