From: Yu-cheng Yu <yu-cheng.yu@intel.com>
To: x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-api@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Andy Lutomirski <luto@amacapital.net>,
Balbir Singh <bsingharora@gmail.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Peter Zijlstra <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: [RFC PATCH v6 18/26] mm: Introduce do_mmap_locked()
Date: Mon, 19 Nov 2018 13:48:01 -0800 [thread overview]
Message-ID: <20181119214809.6086-19-yu-cheng.yu@intel.com> (raw)
In-Reply-To: <20181119214809.6086-1-yu-cheng.yu@intel.com>
There are a few places that need do_mmap() with mm->mmap_sem held.
Create an in-line function for that.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
---
include/linux/mm.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7873ac3635a7..36f72c4441cc 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2348,6 +2348,24 @@ static inline void mm_populate(unsigned long addr, unsigned long len)
static inline void mm_populate(unsigned long addr, unsigned long len) {}
#endif
+static inline unsigned long do_mmap_locked(unsigned long addr,
+ unsigned long len, unsigned long prot, unsigned long flags,
+ vm_flags_t vm_flags)
+{
+ struct mm_struct *mm = current->mm;
+ unsigned long populate;
+
+ down_write(&mm->mmap_sem);
+ addr = do_mmap(NULL, addr, len, prot, flags, vm_flags, 0,
+ &populate, NULL);
+ up_write(&mm->mmap_sem);
+
+ if (populate)
+ mm_populate(addr, populate);
+
+ return addr;
+}
+
/* These take the mm semaphore themselves */
extern int __must_check vm_brk(unsigned long, unsigned long);
extern int __must_check vm_brk_flags(unsigned long, unsigned long, unsigned long);
--
2.17.1
next prev parent reply other threads:[~2018-11-19 21:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-19 21:47 [RFC PATCH v6 00/26] Control-flow Enforcement: Shadow Stack Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 01/26] Documentation/x86: Add CET description Yu-cheng Yu
2018-11-20 9:52 ` Ingo Molnar
2018-11-20 20:36 ` Yu-cheng Yu
2018-11-21 7:24 ` Ingo Molnar
2018-11-19 21:47 ` [RFC PATCH v6 02/26] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 03/26] x86/fpu/xstate: Change names to separate XSAVES system and user states Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 04/26] x86/fpu/xstate: Introduce XSAVES system states Yu-cheng Yu
2018-12-04 16:01 ` Borislav Petkov
2018-12-04 17:08 ` Yu-cheng Yu
2018-12-04 18:16 ` Borislav Petkov
2018-11-19 21:47 ` [RFC PATCH v6 05/26] x86/fpu/xstate: Add XSAVES system states for shadow stack Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 06/26] x86/cet: Add control protection exception handler Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 07/26] x86/cet/shstk: Add Kconfig option for user-mode shadow stack Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 08/26] mm: Introduce VM_SHSTK for shadow stack memory Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 09/26] mm/mmap: Prevent Shadow Stack VMA merges Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 10/26] x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 11/26] x86/mm: Introduce _PAGE_DIRTY_SW Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 12/26] drm/i915/gvt: Update _PAGE_DIRTY to _PAGE_DIRTY_BITS Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 13/26] x86/mm: Modify ptep_set_wrprotect and pmdp_set_wrprotect for _PAGE_DIRTY_SW Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 14/26] x86/mm: Shadow stack page fault error checking Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 15/26] mm: Handle shadow stack page fault Yu-cheng Yu
2018-11-19 21:47 ` [RFC PATCH v6 16/26] mm: Handle THP/HugeTLB " Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 17/26] mm: Update can_follow_write_pte/pmd for shadow stack Yu-cheng Yu
2018-11-19 21:48 ` Yu-cheng Yu [this message]
2018-11-19 21:48 ` [RFC PATCH v6 19/26] x86/cet/shstk: User-mode shadow stack support Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 20/26] x86/cet/shstk: Introduce WRUSS instruction Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 21/26] x86/cet/shstk: Signal handling for shadow stack Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 22/26] x86/cet/shstk: ELF header parsing of Shadow Stack Yu-cheng Yu
2019-04-25 11:02 ` Dave Martin
2019-04-25 15:14 ` Yu-cheng Yu
2019-04-25 15:35 ` Dave Martin
2019-04-25 16:11 ` Dave Martin
2019-04-25 16:20 ` Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 23/26] x86/cet/shstk: Handle thread shadow stack Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 24/26] mm/mmap: Add Shadow stack pages to memory accounting Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 25/26] x86/cet/shstk: Add arch_prctl functions for Shadow Stack Yu-cheng Yu
2018-11-19 21:48 ` [RFC PATCH v6 26/26] x86/cet/shstk: Add Shadow Stack instructions to opcode map Yu-cheng Yu
2018-11-22 16:53 ` [RFC PATCH v6 00/26] Control-flow Enforcement: Shadow Stack Andy Lutomirski
2018-11-26 17:38 ` Yu-cheng Yu
2018-11-26 18:29 ` Andy Lutomirski
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