From: Russell Currey <ruscur@russell.cc>
To: linuxppc-dev@lists.ozlabs.org
Cc: mikey@neuling.org, Russell Currey <ruscur@russell.cc>, npiggin@gmail.com
Subject: [PATCH 3/5] powerpc/lib: checksum GUAP support
Date: Fri, 26 Oct 2018 17:35:11 +1100 [thread overview]
Message-ID: <20181026063513.30806-4-ruscur@russell.cc> (raw)
In-Reply-To: <20181026063513.30806-1-ruscur@russell.cc>
Wrap the checksumming code in GUAP locks and unlocks.
Signed-off-by: Russell Currey <ruscur@russell.cc>
---
arch/powerpc/lib/checksum_wrappers.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/lib/checksum_wrappers.c b/arch/powerpc/lib/checksum_wrappers.c
index a0cb63fb76a1..c67db0a6e18b 100644
--- a/arch/powerpc/lib/checksum_wrappers.c
+++ b/arch/powerpc/lib/checksum_wrappers.c
@@ -28,6 +28,7 @@ __wsum csum_and_copy_from_user(const void __user *src, void *dst,
{
unsigned int csum;
+ unlock_user_access();
might_sleep();
*err_ptr = 0;
@@ -60,6 +61,7 @@ __wsum csum_and_copy_from_user(const void __user *src, void *dst,
}
out:
+ lock_user_access();
return (__force __wsum)csum;
}
EXPORT_SYMBOL(csum_and_copy_from_user);
@@ -69,6 +71,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
{
unsigned int csum;
+ unlock_user_access();
might_sleep();
*err_ptr = 0;
@@ -97,6 +100,7 @@ __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
}
out:
+ lock_user_access();
return (__force __wsum)csum;
}
EXPORT_SYMBOL(csum_and_copy_to_user);
--
2.19.1
next prev parent reply other threads:[~2018-10-26 6:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 6:35 [PATCH 0/5] Guarded Userspace Access Prevention on Radix Russell Currey
2018-10-26 6:35 ` [PATCH 1/5] powerpc/64s: Guarded Userspace Access Prevention Russell Currey
2018-10-26 8:20 ` kbuild test robot
2018-10-28 17:57 ` LEROY Christophe
2018-10-31 4:00 ` Russell Currey
2018-10-31 16:54 ` LEROY Christophe
2018-10-29 13:27 ` kbuild test robot
2018-10-26 6:35 ` [PATCH 2/5] powerpc/futex: GUAP support for futex ops Russell Currey
2018-10-26 16:32 ` LEROY Christophe
2018-10-29 1:08 ` Russell Currey
2018-10-26 6:35 ` Russell Currey [this message]
2018-10-26 16:33 ` [PATCH 3/5] powerpc/lib: checksum GUAP support LEROY Christophe
2018-10-26 6:35 ` [PATCH 4/5] powerpc/64s: Disable GUAP with nosmap option Russell Currey
2018-10-26 6:35 ` [PATCH 5/5] powerpc/64s: Document that PPC supports nosmap Russell Currey
2018-10-26 16:35 ` LEROY Christophe
2018-10-29 1:06 ` Russell Currey
2018-10-31 17:06 ` LEROY Christophe
2018-10-26 16:29 ` [PATCH 0/5] Guarded Userspace Access Prevention on Radix LEROY Christophe
2018-10-31 3:53 ` Russell Currey
2018-10-31 16:58 ` LEROY Christophe
2018-11-01 3:54 ` Russell Currey
2018-11-08 17:52 ` Christophe LEROY
2018-11-08 20:09 ` Benjamin Herrenschmidt
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