The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x 6f6e309328d53a10c0fe1f77dec2db73373179b6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122930-sinner-squad-c6cd@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6f6e309328d53a10c0fe1f77dec2db73373179b6 Mon Sep 17 00:00:00 2001
From: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Date: Tue, 23 Sep 2025 23:01:48 -0700
Subject: [PATCH] crypto: af_alg - zero initialize memory allocated via
sock_kmalloc
Several crypto user API contexts and requests allocated with
sock_kmalloc() were left uninitialized, relying on callers to
set fields explicitly. This resulted in the use of uninitialized
data in certain error paths or when new fields are added in the
future.
The ACVP patches also contain two user-space interface files:
algif_kpp.c and algif_akcipher.c. These too rely on proper
initialization of their context structures.
A particular issue has been observed with the newly added
'inflight' variable introduced in af_alg_ctx by commit:
67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Because the context is not memset to zero after allocation,
the inflight variable has contained garbage values. As a result,
af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when
the garbage value was interpreted as true:
https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209
The check directly tests ctx->inflight without explicitly
comparing against true/false. Since inflight is only ever set to
true or false later, an uninitialized value has triggered
-EBUSY failures. Zero-initializing memory allocated with
sock_kmalloc() ensures inflight and other fields start in a known
state, removing random issues caused by uninitialized data.
Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations")
Fixes: 5afdfd22e6ba ("crypto: algif_rng - add random number generator support")
Fixes: 2d97591ef43d ("crypto: af_alg - consolidation of duplicate code")
Fixes: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Cc: stable(a)vger.kernel.org
Signed-off-by: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au>
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index ca6fdcc6c54a..6c271e55f44d 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1212,15 +1212,14 @@ struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk,
if (unlikely(!areq))
return ERR_PTR(-ENOMEM);
+ memset(areq, 0, areqlen);
+
ctx->inflight = true;
areq->areqlen = areqlen;
areq->sk = sk;
areq->first_rsgl.sgl.sgt.sgl = areq->first_rsgl.sgl.sgl;
- areq->last_rsgl = NULL;
INIT_LIST_HEAD(&areq->rsgl_list);
- areq->tsgl = NULL;
- areq->tsgl_entries = 0;
return areq;
}
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index e3f1a4852737..4d3dfc60a16a 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -416,9 +416,8 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
- ctx->result = NULL;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->more = false;
crypto_init_wait(&ctx->wait);
ask->private = ctx;
diff --git a/crypto/algif_rng.c b/crypto/algif_rng.c
index 10c41adac3b1..1a86e40c8372 100644
--- a/crypto/algif_rng.c
+++ b/crypto/algif_rng.c
@@ -248,9 +248,8 @@ static int rng_accept_parent(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->addtl = NULL;
- ctx->addtl_len = 0;
/*
* No seeding done at that point -- if multiple accepts are
The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 6f6e309328d53a10c0fe1f77dec2db73373179b6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122929-grid-certify-c610@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6f6e309328d53a10c0fe1f77dec2db73373179b6 Mon Sep 17 00:00:00 2001
From: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Date: Tue, 23 Sep 2025 23:01:48 -0700
Subject: [PATCH] crypto: af_alg - zero initialize memory allocated via
sock_kmalloc
Several crypto user API contexts and requests allocated with
sock_kmalloc() were left uninitialized, relying on callers to
set fields explicitly. This resulted in the use of uninitialized
data in certain error paths or when new fields are added in the
future.
The ACVP patches also contain two user-space interface files:
algif_kpp.c and algif_akcipher.c. These too rely on proper
initialization of their context structures.
A particular issue has been observed with the newly added
'inflight' variable introduced in af_alg_ctx by commit:
67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Because the context is not memset to zero after allocation,
the inflight variable has contained garbage values. As a result,
af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when
the garbage value was interpreted as true:
https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209
The check directly tests ctx->inflight without explicitly
comparing against true/false. Since inflight is only ever set to
true or false later, an uninitialized value has triggered
-EBUSY failures. Zero-initializing memory allocated with
sock_kmalloc() ensures inflight and other fields start in a known
state, removing random issues caused by uninitialized data.
Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations")
Fixes: 5afdfd22e6ba ("crypto: algif_rng - add random number generator support")
Fixes: 2d97591ef43d ("crypto: af_alg - consolidation of duplicate code")
Fixes: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Cc: stable(a)vger.kernel.org
Signed-off-by: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au>
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index ca6fdcc6c54a..6c271e55f44d 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1212,15 +1212,14 @@ struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk,
if (unlikely(!areq))
return ERR_PTR(-ENOMEM);
+ memset(areq, 0, areqlen);
+
ctx->inflight = true;
areq->areqlen = areqlen;
areq->sk = sk;
areq->first_rsgl.sgl.sgt.sgl = areq->first_rsgl.sgl.sgl;
- areq->last_rsgl = NULL;
INIT_LIST_HEAD(&areq->rsgl_list);
- areq->tsgl = NULL;
- areq->tsgl_entries = 0;
return areq;
}
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index e3f1a4852737..4d3dfc60a16a 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -416,9 +416,8 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
- ctx->result = NULL;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->more = false;
crypto_init_wait(&ctx->wait);
ask->private = ctx;
diff --git a/crypto/algif_rng.c b/crypto/algif_rng.c
index 10c41adac3b1..1a86e40c8372 100644
--- a/crypto/algif_rng.c
+++ b/crypto/algif_rng.c
@@ -248,9 +248,8 @@ static int rng_accept_parent(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->addtl = NULL;
- ctx->addtl_len = 0;
/*
* No seeding done at that point -- if multiple accepts are
The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 6f6e309328d53a10c0fe1f77dec2db73373179b6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122928-monotone-prodigy-ba4d@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6f6e309328d53a10c0fe1f77dec2db73373179b6 Mon Sep 17 00:00:00 2001
From: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Date: Tue, 23 Sep 2025 23:01:48 -0700
Subject: [PATCH] crypto: af_alg - zero initialize memory allocated via
sock_kmalloc
Several crypto user API contexts and requests allocated with
sock_kmalloc() were left uninitialized, relying on callers to
set fields explicitly. This resulted in the use of uninitialized
data in certain error paths or when new fields are added in the
future.
The ACVP patches also contain two user-space interface files:
algif_kpp.c and algif_akcipher.c. These too rely on proper
initialization of their context structures.
A particular issue has been observed with the newly added
'inflight' variable introduced in af_alg_ctx by commit:
67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Because the context is not memset to zero after allocation,
the inflight variable has contained garbage values. As a result,
af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when
the garbage value was interpreted as true:
https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209
The check directly tests ctx->inflight without explicitly
comparing against true/false. Since inflight is only ever set to
true or false later, an uninitialized value has triggered
-EBUSY failures. Zero-initializing memory allocated with
sock_kmalloc() ensures inflight and other fields start in a known
state, removing random issues caused by uninitialized data.
Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations")
Fixes: 5afdfd22e6ba ("crypto: algif_rng - add random number generator support")
Fixes: 2d97591ef43d ("crypto: af_alg - consolidation of duplicate code")
Fixes: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests")
Cc: stable(a)vger.kernel.org
Signed-off-by: Shivani Agarwal <shivani.agarwal(a)broadcom.com>
Signed-off-by: Herbert Xu <herbert(a)gondor.apana.org.au>
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index ca6fdcc6c54a..6c271e55f44d 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1212,15 +1212,14 @@ struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk,
if (unlikely(!areq))
return ERR_PTR(-ENOMEM);
+ memset(areq, 0, areqlen);
+
ctx->inflight = true;
areq->areqlen = areqlen;
areq->sk = sk;
areq->first_rsgl.sgl.sgt.sgl = areq->first_rsgl.sgl.sgl;
- areq->last_rsgl = NULL;
INIT_LIST_HEAD(&areq->rsgl_list);
- areq->tsgl = NULL;
- areq->tsgl_entries = 0;
return areq;
}
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index e3f1a4852737..4d3dfc60a16a 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -416,9 +416,8 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
- ctx->result = NULL;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->more = false;
crypto_init_wait(&ctx->wait);
ask->private = ctx;
diff --git a/crypto/algif_rng.c b/crypto/algif_rng.c
index 10c41adac3b1..1a86e40c8372 100644
--- a/crypto/algif_rng.c
+++ b/crypto/algif_rng.c
@@ -248,9 +248,8 @@ static int rng_accept_parent(void *private, struct sock *sk)
if (!ctx)
return -ENOMEM;
+ memset(ctx, 0, len);
ctx->len = len;
- ctx->addtl = NULL;
- ctx->addtl_len = 0;
/*
* No seeding done at that point -- if multiple accepts are
The patch below does not apply to the 6.18-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x 83cbb4d33dc22b0ca1a4e85c6e892c9b729e28d4
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122944-trimester-congrats-2c82@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 83cbb4d33dc22b0ca1a4e85c6e892c9b729e28d4 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula(a)intel.com>
Date: Tue, 28 Oct 2025 22:07:27 +0200
Subject: [PATCH] drm/displayid: add quirk to ignore DisplayID checksum errors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add a mechanism for DisplayID specific quirks, and add the first quirk
to ignore DisplayID section checksum errors.
It would be quite inconvenient to pass existing EDID quirks from
drm_edid.c for DisplayID parsing. Not all places doing DisplayID
iteration have the quirks readily available, and would have to pass it
in all places. Simply add a separate array of DisplayID specific EDID
quirks. We do end up checking it every time we iterate DisplayID blocks,
but hopefully the number of quirks remains small.
There are a few laptop models with DisplayID checksum failures, leading
to higher refresh rates only present in the DisplayID blocks being
ignored. Add a quirk for the panel in the machines.
Reported-by: Tiago Martins Araújo <tiago.martins.araujo(a)gmail.com>
Closes: https://lore.kernel.org/r/CACRbrPGvLP5LANXuFi6z0S7XMbAG4X5y2YOLBDxfOVtfGGqi…
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14703
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Tested-by: Tiago Martins Araújo <tiago.martins.araujo(a)gmail.com>
Cc: stable(a)vger.kernel.org
Link: https://patch.msgid.link/c04d81ae648c5f21b3f5b7953f924718051f2798.176168196…
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index 20b453d2b854..58d0bb6d2676 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -9,6 +9,34 @@
#include "drm_crtc_internal.h"
#include "drm_displayid_internal.h"
+enum {
+ QUIRK_IGNORE_CHECKSUM,
+};
+
+struct displayid_quirk {
+ const struct drm_edid_ident ident;
+ u8 quirks;
+};
+
+static const struct displayid_quirk quirks[] = {
+ {
+ .ident = DRM_EDID_IDENT_INIT('C', 'S', 'O', 5142, "MNE007ZA1-5"),
+ .quirks = BIT(QUIRK_IGNORE_CHECKSUM),
+ },
+};
+
+static u8 get_quirks(const struct drm_edid *drm_edid)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(quirks); i++) {
+ if (drm_edid_match(drm_edid, &quirks[i].ident))
+ return quirks[i].quirks;
+ }
+
+ return 0;
+}
+
static const struct displayid_header *
displayid_get_header(const u8 *displayid, int length, int index)
{
@@ -23,7 +51,7 @@ displayid_get_header(const u8 *displayid, int length, int index)
}
static const struct displayid_header *
-validate_displayid(const u8 *displayid, int length, int idx)
+validate_displayid(const u8 *displayid, int length, int idx, bool ignore_checksum)
{
int i, dispid_length;
u8 csum = 0;
@@ -41,8 +69,11 @@ validate_displayid(const u8 *displayid, int length, int idx)
for (i = 0; i < dispid_length; i++)
csum += displayid[idx + i];
if (csum) {
- DRM_NOTE("DisplayID checksum invalid, remainder is %d\n", csum);
- return ERR_PTR(-EINVAL);
+ DRM_NOTE("DisplayID checksum invalid, remainder is %d%s\n", csum,
+ ignore_checksum ? " (ignoring)" : "");
+
+ if (!ignore_checksum)
+ return ERR_PTR(-EINVAL);
}
return base;
@@ -52,6 +83,7 @@ static const u8 *find_next_displayid_extension(struct displayid_iter *iter)
{
const struct displayid_header *base;
const u8 *displayid;
+ bool ignore_checksum = iter->quirks & BIT(QUIRK_IGNORE_CHECKSUM);
displayid = drm_edid_find_extension(iter->drm_edid, DISPLAYID_EXT, &iter->ext_index);
if (!displayid)
@@ -61,7 +93,7 @@ static const u8 *find_next_displayid_extension(struct displayid_iter *iter)
iter->length = EDID_LENGTH - 1;
iter->idx = 1;
- base = validate_displayid(displayid, iter->length, iter->idx);
+ base = validate_displayid(displayid, iter->length, iter->idx, ignore_checksum);
if (IS_ERR(base))
return NULL;
@@ -76,6 +108,7 @@ void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
memset(iter, 0, sizeof(*iter));
iter->drm_edid = drm_edid;
+ iter->quirks = get_quirks(drm_edid);
}
static const struct displayid_block *
diff --git a/drivers/gpu/drm/drm_displayid_internal.h b/drivers/gpu/drm/drm_displayid_internal.h
index 957dd0619f5c..5b1b32f73516 100644
--- a/drivers/gpu/drm/drm_displayid_internal.h
+++ b/drivers/gpu/drm/drm_displayid_internal.h
@@ -167,6 +167,8 @@ struct displayid_iter {
u8 version;
u8 primary_use;
+
+ u8 quirks;
};
void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x 83cbb4d33dc22b0ca1a4e85c6e892c9b729e28d4
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122954-stony-herring-2347@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 83cbb4d33dc22b0ca1a4e85c6e892c9b729e28d4 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula(a)intel.com>
Date: Tue, 28 Oct 2025 22:07:27 +0200
Subject: [PATCH] drm/displayid: add quirk to ignore DisplayID checksum errors
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add a mechanism for DisplayID specific quirks, and add the first quirk
to ignore DisplayID section checksum errors.
It would be quite inconvenient to pass existing EDID quirks from
drm_edid.c for DisplayID parsing. Not all places doing DisplayID
iteration have the quirks readily available, and would have to pass it
in all places. Simply add a separate array of DisplayID specific EDID
quirks. We do end up checking it every time we iterate DisplayID blocks,
but hopefully the number of quirks remains small.
There are a few laptop models with DisplayID checksum failures, leading
to higher refresh rates only present in the DisplayID blocks being
ignored. Add a quirk for the panel in the machines.
Reported-by: Tiago Martins Araújo <tiago.martins.araujo(a)gmail.com>
Closes: https://lore.kernel.org/r/CACRbrPGvLP5LANXuFi6z0S7XMbAG4X5y2YOLBDxfOVtfGGqi…
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14703
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Tested-by: Tiago Martins Araújo <tiago.martins.araujo(a)gmail.com>
Cc: stable(a)vger.kernel.org
Link: https://patch.msgid.link/c04d81ae648c5f21b3f5b7953f924718051f2798.176168196…
Signed-off-by: Jani Nikula <jani.nikula(a)intel.com>
diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index 20b453d2b854..58d0bb6d2676 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -9,6 +9,34 @@
#include "drm_crtc_internal.h"
#include "drm_displayid_internal.h"
+enum {
+ QUIRK_IGNORE_CHECKSUM,
+};
+
+struct displayid_quirk {
+ const struct drm_edid_ident ident;
+ u8 quirks;
+};
+
+static const struct displayid_quirk quirks[] = {
+ {
+ .ident = DRM_EDID_IDENT_INIT('C', 'S', 'O', 5142, "MNE007ZA1-5"),
+ .quirks = BIT(QUIRK_IGNORE_CHECKSUM),
+ },
+};
+
+static u8 get_quirks(const struct drm_edid *drm_edid)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(quirks); i++) {
+ if (drm_edid_match(drm_edid, &quirks[i].ident))
+ return quirks[i].quirks;
+ }
+
+ return 0;
+}
+
static const struct displayid_header *
displayid_get_header(const u8 *displayid, int length, int index)
{
@@ -23,7 +51,7 @@ displayid_get_header(const u8 *displayid, int length, int index)
}
static const struct displayid_header *
-validate_displayid(const u8 *displayid, int length, int idx)
+validate_displayid(const u8 *displayid, int length, int idx, bool ignore_checksum)
{
int i, dispid_length;
u8 csum = 0;
@@ -41,8 +69,11 @@ validate_displayid(const u8 *displayid, int length, int idx)
for (i = 0; i < dispid_length; i++)
csum += displayid[idx + i];
if (csum) {
- DRM_NOTE("DisplayID checksum invalid, remainder is %d\n", csum);
- return ERR_PTR(-EINVAL);
+ DRM_NOTE("DisplayID checksum invalid, remainder is %d%s\n", csum,
+ ignore_checksum ? " (ignoring)" : "");
+
+ if (!ignore_checksum)
+ return ERR_PTR(-EINVAL);
}
return base;
@@ -52,6 +83,7 @@ static const u8 *find_next_displayid_extension(struct displayid_iter *iter)
{
const struct displayid_header *base;
const u8 *displayid;
+ bool ignore_checksum = iter->quirks & BIT(QUIRK_IGNORE_CHECKSUM);
displayid = drm_edid_find_extension(iter->drm_edid, DISPLAYID_EXT, &iter->ext_index);
if (!displayid)
@@ -61,7 +93,7 @@ static const u8 *find_next_displayid_extension(struct displayid_iter *iter)
iter->length = EDID_LENGTH - 1;
iter->idx = 1;
- base = validate_displayid(displayid, iter->length, iter->idx);
+ base = validate_displayid(displayid, iter->length, iter->idx, ignore_checksum);
if (IS_ERR(base))
return NULL;
@@ -76,6 +108,7 @@ void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
memset(iter, 0, sizeof(*iter));
iter->drm_edid = drm_edid;
+ iter->quirks = get_quirks(drm_edid);
}
static const struct displayid_block *
diff --git a/drivers/gpu/drm/drm_displayid_internal.h b/drivers/gpu/drm/drm_displayid_internal.h
index 957dd0619f5c..5b1b32f73516 100644
--- a/drivers/gpu/drm/drm_displayid_internal.h
+++ b/drivers/gpu/drm/drm_displayid_internal.h
@@ -167,6 +167,8 @@ struct displayid_iter {
u8 version;
u8 primary_use;
+
+ u8 quirks;
};
void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
> On 19.12.25 20:31, Sasha Levin wrote:
> This is a note to let you know that I've just added the patch titled
>
> cpufreq: dt-platdev: Add JH7110S SOC to the allowlist
>
> to the 6.18-stable tree which can be found at:
> http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-
> queue.git;a=summary
>
> The filename of the patch is:
> cpufreq-dt-platdev-add-jh7110s-soc-to-the-allowlist.patch
> and it can be found in the queue-6.18 subdirectory.
>
> If you, or anyone else, feels it should not be added to the stable tree, please let
> <stable(a)vger.kernel.org> know about it.
As series [1] is accepted, this patch will be not needed and will be reverted in the mainline.
[1] https://lore.kernel.org/all/20251212211934.135602-1-e@freeshell.de/
So we should not add it to the stable tree. Thanks.
Best regards,
Hal
>
>
>
> commit f922a9b37397e7db449e3fa61c33c542ad783f87
> Author: Hal Feng <hal.feng(a)starfivetech.com>
> Date: Thu Oct 16 16:00:48 2025 +0800
>
> cpufreq: dt-platdev: Add JH7110S SOC to the allowlist
>
> [ Upstream commit 6e7970cab51d01b8f7c56f120486c571c22e1b80 ]
>
> Add the compatible strings for supporting the generic
> cpufreq driver on the StarFive JH7110S SoC.
>
> Signed-off-by: Hal Feng <hal.feng(a)starfivetech.com>
> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt(a)canonical.com>
> Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org>
> Signed-off-by: Sasha Levin <sashal(a)kernel.org>
>
> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-
> dt-platdev.c
> index cd1816a12bb99..dc11b62399ad5 100644
> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
> @@ -87,6 +87,7 @@ static const struct of_device_id allowlist[] __initconst = {
> { .compatible = "st-ericsson,u9540", },
>
> { .compatible = "starfive,jh7110", },
> + { .compatible = "starfive,jh7110s", },
>
> { .compatible = "ti,omap2", },
> { .compatible = "ti,omap4", },
The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x b14fad555302a2104948feaff70503b64c80ac01
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122931-palm-unfixed-3968@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b14fad555302a2104948feaff70503b64c80ac01 Mon Sep 17 00:00:00 2001
From: Prithvi Tambewagh <activprithvi(a)gmail.com>
Date: Thu, 25 Dec 2025 12:58:29 +0530
Subject: [PATCH] io_uring: fix filename leak in __io_openat_prep()
__io_openat_prep() allocates a struct filename using getname(). However,
for the condition of the file being installed in the fixed file table as
well as having O_CLOEXEC flag set, the function returns early. At that
point, the request doesn't have REQ_F_NEED_CLEANUP flag set. Due to this,
the memory for the newly allocated struct filename is not cleaned up,
causing a memory leak.
Fix this by setting the REQ_F_NEED_CLEANUP for the request just after the
successful getname() call, so that when the request is torn down, the
filename will be cleaned up, along with other resources needing cleanup.
Reported-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=00e61c43eb5e4740438f
Tested-by: syzbot+00e61c43eb5e4740438f(a)syzkaller.appspotmail.com
Cc: stable(a)vger.kernel.org
Signed-off-by: Prithvi Tambewagh <activprithvi(a)gmail.com>
Fixes: b9445598d8c6 ("io_uring: openat directly into fixed fd table")
Signed-off-by: Jens Axboe <axboe(a)kernel.dk>
diff --git a/io_uring/openclose.c b/io_uring/openclose.c
index bfeb91b31bba..15dde9bd6ff6 100644
--- a/io_uring/openclose.c
+++ b/io_uring/openclose.c
@@ -73,13 +73,13 @@ static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe
open->filename = NULL;
return ret;
}
+ req->flags |= REQ_F_NEED_CLEANUP;
open->file_slot = READ_ONCE(sqe->file_index);
if (open->file_slot && (open->how.flags & O_CLOEXEC))
return -EINVAL;
open->nofile = rlimit(RLIMIT_NOFILE);
- req->flags |= REQ_F_NEED_CLEANUP;
if (io_openat_force_async(open))
req->flags |= REQ_F_FORCE_ASYNC;
return 0;
The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x e15cb2200b934e507273510ba6bc747d5cde24a3
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122915-sensually-wasting-f5f8@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From e15cb2200b934e507273510ba6bc747d5cde24a3 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe(a)kernel.dk>
Date: Tue, 9 Dec 2025 13:25:23 -0700
Subject: [PATCH] io_uring: fix min_wait wakeups for SQPOLL
Using min_wait, two timeouts are given:
1) The min_wait timeout, within which up to 'wait_nr' events are
waited for.
2) The overall long timeout, which is entered if no events are generated
in the min_wait window.
If the min_wait has expired, any event being posted must wake the task.
For SQPOLL, that isn't the case, as it won't trigger the io_has_work()
condition, as it will have already processed the task_work that happened
when an event was posted. This causes any event to trigger post the
min_wait to not always cause the waiting application to wakeup, and
instead it will wait until the overall timeout has expired. This can be
shown in a test case that has a 1 second min_wait, with a 5 second
overall wait, even if an event triggers after 1.5 seconds:
axboe@m2max-kvm /d/iouring-mre (master)> zig-out/bin/iouring
info: MIN_TIMEOUT supported: true, features: 0x3ffff
info: Testing: min_wait=1000ms, timeout=5s, wait_nr=4
info: 1 cqes in 5000.2ms
where the expected result should be:
axboe@m2max-kvm /d/iouring-mre (master)> zig-out/bin/iouring
info: MIN_TIMEOUT supported: true, features: 0x3ffff
info: Testing: min_wait=1000ms, timeout=5s, wait_nr=4
info: 1 cqes in 1500.3ms
When the min_wait timeout triggers, reset the number of completions
needed to wake the task. This should ensure that any future events will
wake the task, regardless of how many events it originally wanted to
wait for.
Reported-by: Tip ten Brink <tip(a)tenbrinkmeijs.com>
Cc: stable(a)vger.kernel.org
Fixes: 1100c4a2656d ("io_uring: add support for batch wait timeout")
Link: https://github.com/axboe/liburing/issues/1477
Signed-off-by: Jens Axboe <axboe(a)kernel.dk>
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 5d130c578435..6cb24cdf8e68 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2536,6 +2536,9 @@ static enum hrtimer_restart io_cqring_min_timer_wakeup(struct hrtimer *timer)
goto out_wake;
}
+ /* any generated CQE posted past this time should wake us up */
+ iowq->cq_tail = iowq->cq_min_tail;
+
hrtimer_update_function(&iowq->t, io_cqring_timer_wakeup);
hrtimer_set_expires(timer, iowq->timeout);
return HRTIMER_RESTART;
The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 84230ad2d2afbf0c44c32967e525c0ad92e26b4e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025122905-unused-cash-520e@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 84230ad2d2afbf0c44c32967e525c0ad92e26b4e Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe(a)kernel.dk>
Date: Mon, 1 Dec 2025 13:25:22 -0700
Subject: [PATCH] io_uring/poll: correctly handle io_poll_add() return value on
update
When the core of io_uring was updated to handle completions
consistently and with fixed return codes, the POLL_REMOVE opcode
with updates got slightly broken. If a POLL_ADD is pending and
then POLL_REMOVE is used to update the events of that request, if that
update causes the POLL_ADD to now trigger, then that completion is lost
and a CQE is never posted.
Additionally, ensure that if an update does cause an existing POLL_ADD
to complete, that the completion value isn't always overwritten with
-ECANCELED. For that case, whatever io_poll_add() set the value to
should just be retained.
Cc: stable(a)vger.kernel.org
Fixes: 97b388d70b53 ("io_uring: handle completions in the core")
Reported-by: syzbot+641eec6b7af1f62f2b99(a)syzkaller.appspotmail.com
Tested-by: syzbot+641eec6b7af1f62f2b99(a)syzkaller.appspotmail.com
Signed-off-by: Jens Axboe <axboe(a)kernel.dk>
diff --git a/io_uring/poll.c b/io_uring/poll.c
index 8aa4e3a31e73..3f1d716dcfab 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -937,12 +937,17 @@ int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags)
ret2 = io_poll_add(preq, issue_flags & ~IO_URING_F_UNLOCKED);
/* successfully updated, don't complete poll request */
- if (!ret2 || ret2 == -EIOCBQUEUED)
+ if (ret2 == IOU_ISSUE_SKIP_COMPLETE)
goto out;
+ /* request completed as part of the update, complete it */
+ else if (ret2 == IOU_COMPLETE)
+ goto complete;
}
- req_set_fail(preq);
io_req_set_res(preq, -ECANCELED, 0);
+complete:
+ if (preq->cqe.res < 0)
+ req_set_fail(preq);
preq->io_task_work.func = io_req_task_complete;
io_req_task_work_add(preq);
out: