From: Quentin Schulz <quentin.schulz(a)cherry.de>
The Device Tree specification specifies[1] that
"""
Each node in the devicetree is named according to the following
convention:
node-name@unit-address
[...]
The unit-address must match the first address specified in the reg
property of the node.
"""
The first address in the reg property is fdaXa000 and not fdaX9000. This
is likely a copy-paste error as the IOMMU for core0 has two entries in
the reg property, the first one being fdab9000 and the second fdaba000.
Let's fix this oversight to match what the spec is expecting.
[1] https://github.com/devicetree-org/devicetree-specification/releases/downloa… 2.2.1 Node Names
Fixes: a31dfc060a74 ("arm64: dts: rockchip: Add nodes for NPU and its MMU to rk3588-base")
Cc: stable(a)vger.kernel.org
Signed-off-by: Quentin Schulz <quentin.schulz(a)cherry.de>
---
arch/arm64/boot/dts/rockchip/rk3588-base.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
index 2a79217930206..7ab12d1054a73 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588-base.dtsi
@@ -1200,7 +1200,7 @@ rknn_core_1: npu@fdac0000 {
status = "disabled";
};
- rknn_mmu_1: iommu@fdac9000 {
+ rknn_mmu_1: iommu@fdaca000 {
compatible = "rockchip,rk3588-iommu", "rockchip,rk3568-iommu";
reg = <0x0 0xfdaca000 0x0 0x100>;
interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH 0>;
@@ -1230,7 +1230,7 @@ rknn_core_2: npu@fdad0000 {
status = "disabled";
};
- rknn_mmu_2: iommu@fdad9000 {
+ rknn_mmu_2: iommu@fdada000 {
compatible = "rockchip,rk3588-iommu", "rockchip,rk3568-iommu";
reg = <0x0 0xfdada000 0x0 0x100>;
interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH 0>;
---
base-commit: a619746d25c8adafe294777cc98c47a09759b3ed
change-id: 20251215-npu-dt-node-address-7bfeab42dae9
Best regards,
--
Quentin Schulz <quentin.schulz(a)cherry.de>
As reported[1], in the current state of master (that is, *without*
that[2] patch, yet unmerged), it is possible to trigger
Oops/out-of-bounds errors/unbalanced runtime PM by simply compiling
DRM_ACCEL_ROCKET built-in (=y) instead of as a module (=m).
This fixes points 1 and 2 reported here[1] by fixing the unwinding in
two functions to properly undo everything done in the same function
prior to the error.
Note that this doesn't mean the Rocket device is usable if one core is
missing. In fact, it seems it doesn't as I'm hit with many
rocket fdac0000.npu: NPU job timed out
followed by one
rocket fdad0000.npu: NPU job timed out
(and that, five times) whenever core0 (fdab0000.npu) fails to probe and
I'm running the example from
https://docs.mesa3d.org/teflon.html#do-some-inference-with-mobilenetv1
so something else probably needs some additional love.
[1] https://lore.kernel.org/linux-rockchip/0b20d760-ad4f-41c0-b733-39db10d6cc41…
[2] https://lore.kernel.org/linux-rockchip/20251205064739.20270-1-rmxpzlb@gmail…
Signed-off-by: Quentin Schulz <quentin.schulz(a)cherry.de>
---
Quentin Schulz (2):
accel/rocket: fix unwinding in error path in rocket_core_init
accel/rocket: fix unwinding in error path in rocket_probe
drivers/accel/rocket/rocket_core.c | 7 +++++--
drivers/accel/rocket/rocket_drv.c | 15 ++++++++++++++-
2 files changed, 19 insertions(+), 3 deletions(-)
---
base-commit: a619746d25c8adafe294777cc98c47a09759b3ed
change-id: 20251212-rocket-error-path-f9784c46a503
Best regards,
--
Quentin Schulz <quentin.schulz(a)cherry.de>
kstack_offset was previously maintained per-cpu, but this caused a
couple of issues. So let's instead make it per-task.
Issue 1: add_random_kstack_offset() and choose_random_kstack_offset()
expected and required to be called with interrupts and preemption
disabled so that it could manipulate per-cpu state. But arm64, loongarch
and risc-v are calling them with interrupts and preemption enabled. I
don't _think_ this causes any functional issues, but it's certainly
unexpected and could lead to manipulating the wrong cpu's state, which
could cause a minor performance degradation due to bouncing the cache
lines. By maintaining the state per-task those functions can safely be
called in preemptible context.
Issue 2: add_random_kstack_offset() is called before executing the
syscall and expands the stack using a previously chosen rnadom offset.
choose_random_kstack_offset() is called after executing the syscall and
chooses and stores a new random offset for the next syscall. With
per-cpu storage for this offset, an attacker could force cpu migration
during the execution of the syscall and prevent the offset from being
updated for the original cpu such that it is predictable for the next
syscall on that cpu. By maintaining the state per-task, this problem
goes away because the per-task random offset is updated after the
syscall regardless of which cpu it is executing on.
Fixes: 39218ff4c625 ("stack: Optionally randomize kernel stack offset each syscall")
Closes: https://lore.kernel.org/all/dd8c37bc-795f-4c7a-9086-69e584d8ab24@arm.com/
Cc: stable(a)vger.kernel.org
Signed-off-by: Ryan Roberts <ryan.roberts(a)arm.com>
---
include/linux/randomize_kstack.h | 26 +++++++++++++++-----------
include/linux/sched.h | 4 ++++
init/main.c | 1 -
kernel/fork.c | 2 ++
4 files changed, 21 insertions(+), 12 deletions(-)
diff --git a/include/linux/randomize_kstack.h b/include/linux/randomize_kstack.h
index 1d982dbdd0d0..5d3916ca747c 100644
--- a/include/linux/randomize_kstack.h
+++ b/include/linux/randomize_kstack.h
@@ -9,7 +9,6 @@
DECLARE_STATIC_KEY_MAYBE(CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT,
randomize_kstack_offset);
-DECLARE_PER_CPU(u32, kstack_offset);
/*
* Do not use this anywhere else in the kernel. This is used here because
@@ -50,15 +49,14 @@ DECLARE_PER_CPU(u32, kstack_offset);
* add_random_kstack_offset - Increase stack utilization by previously
* chosen random offset
*
- * This should be used in the syscall entry path when interrupts and
- * preempt are disabled, and after user registers have been stored to
- * the stack. For testing the resulting entropy, please see:
- * tools/testing/selftests/lkdtm/stack-entropy.sh
+ * This should be used in the syscall entry path after user registers have been
+ * stored to the stack. Preemption may be enabled. For testing the resulting
+ * entropy, please see: tools/testing/selftests/lkdtm/stack-entropy.sh
*/
#define add_random_kstack_offset() do { \
if (static_branch_maybe(CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT, \
&randomize_kstack_offset)) { \
- u32 offset = raw_cpu_read(kstack_offset); \
+ u32 offset = current->kstack_offset; \
u8 *ptr = __kstack_alloca(KSTACK_OFFSET_MAX(offset)); \
/* Keep allocation even after "ptr" loses scope. */ \
asm volatile("" :: "r"(ptr) : "memory"); \
@@ -69,9 +67,9 @@ DECLARE_PER_CPU(u32, kstack_offset);
* choose_random_kstack_offset - Choose the random offset for the next
* add_random_kstack_offset()
*
- * This should only be used during syscall exit when interrupts and
- * preempt are disabled. This position in the syscall flow is done to
- * frustrate attacks from userspace attempting to learn the next offset:
+ * This should only be used during syscall exit. Preemption may be enabled. This
+ * position in the syscall flow is done to frustrate attacks from userspace
+ * attempting to learn the next offset:
* - Maximize the timing uncertainty visible from userspace: if the
* offset is chosen at syscall entry, userspace has much more control
* over the timing between choosing offsets. "How long will we be in
@@ -85,14 +83,20 @@ DECLARE_PER_CPU(u32, kstack_offset);
#define choose_random_kstack_offset(rand) do { \
if (static_branch_maybe(CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT, \
&randomize_kstack_offset)) { \
- u32 offset = raw_cpu_read(kstack_offset); \
+ u32 offset = current->kstack_offset; \
offset = ror32(offset, 5) ^ (rand); \
- raw_cpu_write(kstack_offset, offset); \
+ current->kstack_offset = offset; \
} \
} while (0)
+
+static inline void random_kstack_task_init(struct task_struct *tsk)
+{
+ tsk->kstack_offset = 0;
+}
#else /* CONFIG_RANDOMIZE_KSTACK_OFFSET */
#define add_random_kstack_offset() do { } while (0)
#define choose_random_kstack_offset(rand) do { } while (0)
+#define random_kstack_task_init(tsk) do { } while (0)
#endif /* CONFIG_RANDOMIZE_KSTACK_OFFSET */
#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d395f2810fac..9e0080ed1484 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1591,6 +1591,10 @@ struct task_struct {
unsigned long prev_lowest_stack;
#endif
+#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET
+ u32 kstack_offset;
+#endif
+
#ifdef CONFIG_X86_MCE
void __user *mce_vaddr;
__u64 mce_kflags;
diff --git a/init/main.c b/init/main.c
index b84818ad9685..27fcbbde933e 100644
--- a/init/main.c
+++ b/init/main.c
@@ -830,7 +830,6 @@ static inline void initcall_debug_enable(void)
#ifdef CONFIG_RANDOMIZE_KSTACK_OFFSET
DEFINE_STATIC_KEY_MAYBE_RO(CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT,
randomize_kstack_offset);
-DEFINE_PER_CPU(u32, kstack_offset);
static int __init early_randomize_kstack_offset(char *buf)
{
diff --git a/kernel/fork.c b/kernel/fork.c
index b1f3915d5f8e..b061e1edbc43 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -95,6 +95,7 @@
#include <linux/thread_info.h>
#include <linux/kstack_erase.h>
#include <linux/kasan.h>
+#include <linux/randomize_kstack.h>
#include <linux/scs.h>
#include <linux/io_uring.h>
#include <linux/bpf.h>
@@ -2231,6 +2232,7 @@ __latent_entropy struct task_struct *copy_process(
if (retval)
goto bad_fork_cleanup_io;
+ random_kstack_task_init(p);
stackleak_task_init(p);
if (pid != &init_struct_pid) {
--
2.43.0
¿Cuánto cuesta una mala contratación?
body {
margin: 0;
padding: 0;
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
color: #333;
background-color: #ffffff;
}
table {
border-spacing: 0;
width: 100%;
max-width: 600px;
margin: auto;
}
td {
padding: 12px 20px;
}
a {
color: #1a73e8;
text-decoration: none;
}
.footer {
font-size: 12px;
color: #888888;
text-align: center;
}
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In the alloc_ep_skb_list() failure path, the c4iw_put_ep() is
incorrectly used instead of the kfree(). Since the child_ep's
reference count hasn't been properly established at this point,
the c4iw_put_ep() won't actually free the memory, resulting in
permanent memory leak.
Fix by releasing child_ep correctly in the fail path.
Fixes: 4a740838bf44 ("RDMA/iw_cxgb4: Low resource fixes for connection manager")
Cc: stable(a)vger.kernel.org
Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn>
---
drivers/infiniband/hw/cxgb4/cm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index b3b45c49077d..a09eeb48775f 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -2665,7 +2665,7 @@ static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb)
}
goto out;
fail:
- c4iw_put_ep(&child_ep->com);
+ kfree(child_ep);
reject:
reject_cr(dev, hwtid, skb);
out:
--
2.34.1
The struct ip_tunnel_info has a flexible array member named
options that is protected by a counted_by(options_len)
attribute.
The compiler will use this information to enforce runtime bounds
checking deployed by FORTIFY_SOURCE string helpers.
As laid out in the GCC documentation, the counter must be
initialized before the first reference to the flexible array
member.
After scanning through the files that use struct ip_tunnel_info
and also refer to options or options_len, it appears the normal
case is to use the ip_tunnel_info_opts_set() helper.
Said helper would initialize options_len properly before copying
data into options, however in the GRE ERSPAN code a partial
update is done, preventing the use of the helper function.
Before this change the handling of ERSPAN traffic in GRE tunnels
would cause a kernel panic when the kernel is compiled with
GCC 15+ and having FORTIFY_SOURCE configured:
memcpy: detected buffer overflow: 4 byte write of buffer size 0
Call Trace:
<IRQ>
__fortify_panic+0xd/0xf
erspan_rcv.cold+0x68/0x83
? ip_route_input_slow+0x816/0x9d0
gre_rcv+0x1b2/0x1c0
gre_rcv+0x8e/0x100
? raw_v4_input+0x2a0/0x2b0
ip_protocol_deliver_rcu+0x1ea/0x210
ip_local_deliver_finish+0x86/0x110
ip_local_deliver+0x65/0x110
? ip_rcv_finish_core+0xd6/0x360
ip_rcv+0x186/0x1a0
Cc: stable(a)vger.kernel.org
Link: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-co…
Reported-at: https://launchpad.net/bugs/2129580
Fixes: bb5e62f2d547 ("net: Add options as a flexible array to struct ip_tunnel_info")
Signed-off-by: Frode Nordahl <fnordahl(a)ubuntu.com>
---
v2:
- target correct netdev tree and properly cc stable in commit message.
- replace repeated long in-line comments and link with a single line.
- document search for any similar offenses in the code base in commit
message.
v1: https://lore.kernel.org/all/20251212073202.13153-1-fnordahl@ubuntu.com/
net/ipv4/ip_gre.c | 6 ++++--
net/ipv6/ip6_gre.c | 6 ++++--
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 761a53c6a89a..8178c44a3cdd 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -330,6 +330,10 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
if (!tun_dst)
return PACKET_REJECT;
+ /* MUST set options_len before referencing options */
+ info = &tun_dst->u.tun_info;
+ info->options_len = sizeof(*md);
+
/* skb can be uncloned in __iptunnel_pull_header, so
* old pkt_md is no longer valid and we need to reset
* it
@@ -344,10 +348,8 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
memcpy(md2, pkt_md, ver == 1 ? ERSPAN_V1_MDSIZE :
ERSPAN_V2_MDSIZE);
- info = &tun_dst->u.tun_info;
__set_bit(IP_TUNNEL_ERSPAN_OPT_BIT,
info->key.tun_flags);
- info->options_len = sizeof(*md);
}
skb_reset_mac_header(skb);
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index c82a75510c0e..4603554d4c7f 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -535,6 +535,10 @@ static int ip6erspan_rcv(struct sk_buff *skb,
if (!tun_dst)
return PACKET_REJECT;
+ /* MUST set options_len before referencing options */
+ info = &tun_dst->u.tun_info;
+ info->options_len = sizeof(*md);
+
/* skb can be uncloned in __iptunnel_pull_header, so
* old pkt_md is no longer valid and we need to reset
* it
@@ -543,7 +547,6 @@ static int ip6erspan_rcv(struct sk_buff *skb,
skb_network_header_len(skb);
pkt_md = (struct erspan_metadata *)(gh + gre_hdr_len +
sizeof(*ershdr));
- info = &tun_dst->u.tun_info;
md = ip_tunnel_info_opts(info);
md->version = ver;
md2 = &md->u.md2;
@@ -551,7 +554,6 @@ static int ip6erspan_rcv(struct sk_buff *skb,
ERSPAN_V2_MDSIZE);
__set_bit(IP_TUNNEL_ERSPAN_OPT_BIT,
info->key.tun_flags);
- info->options_len = sizeof(*md);
ip6_tnl_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);
--
2.51.0
virtio_fs_add_queues_sysfs() creates per-queue sysfs kobjects via
kobject_create_and_add(). The current code checks the wrong variable
after the allocation:
- kobject_create_and_add() may return NULL on failure.
- The code incorrectly checks fs->mqs_kobj (the parent kobject), which is
expected to be non-NULL at this point.
- If kobject_create_and_add() fails, fsvq->kobj is NULL but the code can
still call sysfs_create_group(fsvq->kobj, ...), leading to a NULL pointer
dereference and kernel panic (DoS).
Fix by validating fsvq->kobj immediately after kobject_create_and_add()
and aborting on failure, so sysfs_create_group() is never called with a
NULL kobject.
Reported-by: Qianchang Zhao <pioooooooooip(a)gmail.com>
Reported-by: Zhitong Liu <liuzhitong1993(a)gmail.com>
Cc: stable(a)vger.kernel.org
Signed-off-by: Qianchang Zhao <pioooooooooip(a)gmail.com>
---
fs/fuse/virtio_fs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 6bc7c97b0..b2f6486fe 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -373,7 +373,7 @@ static int virtio_fs_add_queues_sysfs(struct virtio_fs *fs)
sprintf(buff, "%d", i);
fsvq->kobj = kobject_create_and_add(buff, fs->mqs_kobj);
- if (!fs->mqs_kobj) {
+ if (!fsvq->kobj) {
ret = -ENOMEM;
goto out_del;
}
--
2.34.1
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