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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org, linux-mm@kvack.org
Subject: [PATCH RESEND] drm/i915/gem: Use user_write_access_begin() instead of user_access_begin()
Date: Sat,  1 May 2021 08:15:51 +0000 (UTC)	[thread overview]
Message-ID: <1acb97f184bf08078ebe0ba8a20b41937949a5a8.1619856556.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <f148cffa418ca0e6e4d79657fc8a9108917291ce.1619856556.git.christophe.leroy@csgroup.eu>

eb_copy_relocations() only do unsafe_put_user(), it only
requires write access to user.

Use user_write_access_begin() instead of user_access_begin().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
Resending with mm list in addition

 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5964e67c7d36..f7a7bb45274b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1907,14 +1907,14 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 		 * happened we would make the mistake of assuming that the
 		 * relocations were valid.
 		 */
-		if (!user_access_begin(urelocs, size))
+		if (!user_write_access_begin(urelocs, size))
 			goto end;
 
 		for (copied = 0; copied < nreloc; copied++)
 			unsafe_put_user(-1,
 					&urelocs[copied].presumed_offset,
 					end_user);
-		user_access_end();
+		user_write_access_end();
 
 		eb->exec[i].relocs_ptr = (uintptr_t)relocs;
 	}
@@ -1922,7 +1922,7 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 	return 0;
 
 end_user:
-	user_access_end();
+	user_write_access_end();
 end:
 	kvfree(relocs);
 	err = -EFAULT;
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, intel-gfx@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH RESEND] drm/i915/gem: Use user_write_access_begin() instead of user_access_begin()
Date: Sat,  1 May 2021 08:15:51 +0000 (UTC)	[thread overview]
Message-ID: <1acb97f184bf08078ebe0ba8a20b41937949a5a8.1619856556.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <f148cffa418ca0e6e4d79657fc8a9108917291ce.1619856556.git.christophe.leroy@csgroup.eu>

eb_copy_relocations() only do unsafe_put_user(), it only
requires write access to user.

Use user_write_access_begin() instead of user_access_begin().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
Resending with mm list in addition

 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5964e67c7d36..f7a7bb45274b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1907,14 +1907,14 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 		 * happened we would make the mistake of assuming that the
 		 * relocations were valid.
 		 */
-		if (!user_access_begin(urelocs, size))
+		if (!user_write_access_begin(urelocs, size))
 			goto end;
 
 		for (copied = 0; copied < nreloc; copied++)
 			unsafe_put_user(-1,
 					&urelocs[copied].presumed_offset,
 					end_user);
-		user_access_end();
+		user_write_access_end();
 
 		eb->exec[i].relocs_ptr = (uintptr_t)relocs;
 	}
@@ -1922,7 +1922,7 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 	return 0;
 
 end_user:
-	user_access_end();
+	user_write_access_end();
 end:
 	kvfree(relocs);
 	err = -EFAULT;
-- 
2.25.0

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, intel-gfx@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH RESEND] drm/i915/gem: Use user_write_access_begin() instead of user_access_begin()
Date: Sat,  1 May 2021 08:15:51 +0000 (UTC)	[thread overview]
Message-ID: <1acb97f184bf08078ebe0ba8a20b41937949a5a8.1619856556.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <f148cffa418ca0e6e4d79657fc8a9108917291ce.1619856556.git.christophe.leroy@csgroup.eu>

eb_copy_relocations() only do unsafe_put_user(), it only
requires write access to user.

Use user_write_access_begin() instead of user_access_begin().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
Resending with mm list in addition

 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5964e67c7d36..f7a7bb45274b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1907,14 +1907,14 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 		 * happened we would make the mistake of assuming that the
 		 * relocations were valid.
 		 */
-		if (!user_access_begin(urelocs, size))
+		if (!user_write_access_begin(urelocs, size))
 			goto end;
 
 		for (copied = 0; copied < nreloc; copied++)
 			unsafe_put_user(-1,
 					&urelocs[copied].presumed_offset,
 					end_user);
-		user_access_end();
+		user_write_access_end();
 
 		eb->exec[i].relocs_ptr = (uintptr_t)relocs;
 	}
@@ -1922,7 +1922,7 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb)
 	return 0;
 
 end_user:
-	user_access_end();
+	user_write_access_end();
 end:
 	kvfree(relocs);
 	err = -EFAULT;
-- 
2.25.0

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  reply	other threads:[~2021-05-01  8:20 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-01  8:15 [PATCH RESEND] iov_iter: Use user_read_access_begin() instead of user_access_begin() Christophe Leroy
2021-05-01  8:15 ` Christophe Leroy
2021-05-01  8:15 ` Christophe Leroy [this message]
2021-05-01  8:15   ` [Intel-gfx] [PATCH RESEND] drm/i915/gem: Use user_write_access_begin() " Christophe Leroy
2021-05-01  8:15   ` Christophe Leroy
2021-05-03 20:27 ` [Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915/gem: Use user_write_access_begin() instead of user_access_begin() (rev2) Patchwork
2021-05-04  0:54 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork

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