From: Mark Brown <broonie@kernel.org>
To: Richard Henderson <richard.henderson@linaro.org>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Matt Turner <mattst88@gmail.com>,
Vineet Gupta <vgupta@kernel.org>,
Russell King <linux@armlinux.org.uk>,
Guo Ren <guoren@kernel.org>, Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Naveen N Rao <naveen@kernel.org>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
"David S. Miller" <davem@davemloft.net>,
Andreas Larsson <andreas@gaisler.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-csky@vger.kernel.org, loongarch@lists.linux.dev,
linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
linux-mm@kvack.org, "Liam R. Howlett" <Liam.Howlett@Oracle.com>,
Mark Brown <broonie@kernel.org>
Subject: [PATCH v2 2/3] mm: Pass vm_flags to generic_get_unmapped_area()
Date: Wed, 04 Sep 2024 17:58:00 +0100 [thread overview]
Message-ID: <20240904-mm-generic-shadow-stack-guard-v2-2-a46b8b6dc0ed@kernel.org> (raw)
In-Reply-To: <20240904-mm-generic-shadow-stack-guard-v2-0-a46b8b6dc0ed@kernel.org>
In preparation for using vm_flags to ensure guard pages for shadow stacks
supply them as an argument to generic_get_unmapped_area(). The only user
outside of the core code is the PowerPC book3s64 implementation which is
trivially wrapping the generic implementation in the radix_enabled() case.
No functional changes.
Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
arch/powerpc/mm/book3s64/slice.c | 4 ++--
include/linux/sched/mm.h | 4 ++--
mm/mmap.c | 10 ++++++----
3 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/mm/book3s64/slice.c b/arch/powerpc/mm/book3s64/slice.c
index ada6bf896ef8..87307d0fc3b8 100644
--- a/arch/powerpc/mm/book3s64/slice.c
+++ b/arch/powerpc/mm/book3s64/slice.c
@@ -641,7 +641,7 @@ unsigned long arch_get_unmapped_area(struct file *filp,
vm_flags_t vm_flags)
{
if (radix_enabled())
- return generic_get_unmapped_area(filp, addr, len, pgoff, flags);
+ return generic_get_unmapped_area(filp, addr, len, pgoff, flags, vm_flags);
return slice_get_unmapped_area(addr, len, flags,
mm_ctx_user_psize(¤t->mm->context), 0);
@@ -655,7 +655,7 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp,
vm_flags_t vm_flags)
{
if (radix_enabled())
- return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags);
+ return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags, vm_flags);
return slice_get_unmapped_area(addr0, len, flags,
mm_ctx_user_psize(¤t->mm->context), 1);
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h
index c4d34abc45d4..07bb8d4181d7 100644
--- a/include/linux/sched/mm.h
+++ b/include/linux/sched/mm.h
@@ -204,11 +204,11 @@ unsigned long mm_get_unmapped_area_vmflags(struct mm_struct *mm,
unsigned long
generic_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
- unsigned long flags);
+ unsigned long flags, vm_flags_t vm_flags);
unsigned long
generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
- unsigned long flags);
+ unsigned long flags, vm_flags_t vm_flags);
#else
static inline void arch_pick_mmap_layout(struct mm_struct *mm,
struct rlimit *rlim_stack) {}
diff --git a/mm/mmap.c b/mm/mmap.c
index 7528146f886f..b06ba847c96e 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1789,7 +1789,7 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info)
unsigned long
generic_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
- unsigned long flags)
+ unsigned long flags, vm_flags_t vm_flags)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma, *prev;
@@ -1823,7 +1823,8 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags, vm_flags_t vm_flags)
{
- return generic_get_unmapped_area(filp, addr, len, pgoff, flags);
+ return generic_get_unmapped_area(filp, addr, len, pgoff, flags,
+ vm_flags);
}
#endif
@@ -1834,7 +1835,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long
generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
- unsigned long flags)
+ unsigned long flags, vm_flags_t vm_flags)
{
struct vm_area_struct *vma, *prev;
struct mm_struct *mm = current->mm;
@@ -1887,7 +1888,8 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags, vm_flags_t vm_flags)
{
- return generic_get_unmapped_area_topdown(filp, addr, len, pgoff, flags);
+ return generic_get_unmapped_area_topdown(filp, addr, len, pgoff, flags,
+ vm_flags);
}
#endif
--
2.39.2
next prev parent reply other threads:[~2024-09-04 17:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-04 16:57 [PATCH v2 0/3] mm: Care about shadow stack guard gap when getting an unmapped area Mark Brown
2024-09-04 16:57 ` [PATCH v2 1/3] mm: Make arch_get_unmapped_area() take vm_flags by default Mark Brown
2024-09-04 16:58 ` Mark Brown [this message]
2024-09-04 16:58 ` [PATCH v2 3/3] mm: Care about shadow stack guard gap when getting an unmapped area Mark Brown
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