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[PATCH v6.1 0/2] x86/mm/pat: fix VM_PAT handling

by Ajay Kaher

[PATCH v6.1 1/2]: required to backport [PATCH v6.1 2/2]. [PATCH v6.1 2/2]: backport to fix VM_PAT handling when fork() fails in copy_page_range(). arch/x86/mm/pat/memtype.c | 50 +++++++++++++++++++++++---------------- include/linux/pgtable.h | 31 ++++++++++++++++++------ kernel/fork.c | 4 ++++ mm/memory.c | 10 ++++---- mm/mremap.c | 2 +- 5 files changed, 62 insertions(+), 35 deletions(-) -- 2.40.4

2 weeks

[PATCH] usb: cdns3: fix a null pointer dereference in cdns3_gadget_ep_queue()

by Haoxiang Li

If cdns3_gadget_ep_alloc_request() fails, a null pointer dereference occurs. Add a check to prevent it. Found by code review and compiled on ubuntu 20.04. Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <lihaoxiang(a)isrc.iscas.ac.cn> --- drivers/usb/cdns3/cdns3-gadget.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 168707213ed9..cc2421a34588 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -2659,6 +2659,8 @@ static int cdns3_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, struct cdns3_request *priv_req; zlp_request = cdns3_gadget_ep_alloc_request(ep, GFP_ATOMIC); + if (!zlp_request) + return -ENOMEM; zlp_request->buf = priv_dev->zlp_buf; zlp_request->length = 0; -- 2.25.1

2 weeks

[PATCH] usb: cdns2: fix a null pointer dereference in cdns2_gadget_ep_queue()

by Haoxiang Li

If cdns2_gadget_ep_alloc_request() fails, a null pointer dereference occurs. Add a check to prevent it. Fixes: 3eb1f1efe204 ("usb: cdns2: Add main part of Cadence USBHS driver") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <lihaoxiang(a)isrc.iscas.ac.cn> --- drivers/usb/gadget/udc/cdns2/cdns2-gadget.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c index 9b53daf76583..c5b9dae743d8 100644 --- a/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c +++ b/drivers/usb/gadget/udc/cdns2/cdns2-gadget.c @@ -1725,6 +1725,8 @@ static int cdns2_gadget_ep_queue(struct usb_ep *ep, struct usb_request *request, struct cdns2_request *preq; zlp_request = cdns2_gadget_ep_alloc_request(ep, GFP_ATOMIC); + if (!zlp_request) + return -ENOMEM; zlp_request->buf = pdev->zlp_buf; zlp_request->length = 0; -- 2.25.1

2 weeks

[PATCH] drm/msm/dpu: Add missing NULL pointer check for pingpong interface

by Nikolay Kuratov

It is checked almost always in dpu_encoder_phys_wb_setup_ctl(), but in a single place the check is missing. Also use convenient locals instead of phys_enc->* where available. Cc: stable(a)vger.kernel.org Fixes: d7d0e73f7de33 ("drm/msm/dpu: introduce the dpu_encoder_phys_* for writeback") Signed-off-by: Nikolay Kuratov <kniv(a)yandex-team.ru> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c index 46f348972a97..6d28f2281c76 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c @@ -247,14 +247,12 @@ static void dpu_encoder_phys_wb_setup_ctl(struct dpu_encoder_phys *phys_enc) if (hw_cdm) intf_cfg.cdm = hw_cdm->idx; - if (phys_enc->hw_pp->merge_3d && phys_enc->hw_pp->merge_3d->ops.setup_3d_mode) - phys_enc->hw_pp->merge_3d->ops.setup_3d_mode(phys_enc->hw_pp->merge_3d, - mode_3d); + if (hw_pp && hw_pp->merge_3d && hw_pp->merge_3d->ops.setup_3d_mode) + hw_pp->merge_3d->ops.setup_3d_mode(hw_pp->merge_3d, mode_3d); /* setup which pp blk will connect to this wb */ - if (hw_pp && phys_enc->hw_wb->ops.bind_pingpong_blk) - phys_enc->hw_wb->ops.bind_pingpong_blk(phys_enc->hw_wb, - phys_enc->hw_pp->idx); + if (hw_pp && hw_wb->ops.bind_pingpong_blk) + hw_wb->ops.bind_pingpong_blk(hw_wb, hw_pp->idx); phys_enc->hw_ctl->ops.setup_intf_cfg(phys_enc->hw_ctl, &intf_cfg); } else if (phys_enc->hw_ctl && phys_enc->hw_ctl->ops.setup_intf_cfg) { -- 2.34.1

2 weeks

[PATCH V2 0/2] LoongArch: KVM: fix "unreliable stack" issue

by Xianglai Li

When starting multi-core loongarch virtualization on loongarch physical machine, loading livepatch on the physical machine will cause an error similar to the following: [ 411.686289] livepatch: klp_try_switch_task: CPU 31/KVM:3116 has an unreliable stack The specific test steps are as follows: 1.Start a multi-core virtual machine on a physical machine 2.Enter the following command on the physical machine to turn on the debug switch: echo "file kernel/livepatch/transition.c +p" > /sys/kernel/debug/\ dynamic_debug/control 3.Load livepatch: modprobe livepatch-sample Through the above steps, similar prints can be viewed in dmesg. The reason for this issue is that the code of the kvm_exc_entry function was copied in the function kvm_loongarch_env_init. When the cpu needs to execute kvm_exc_entry, it will switch to the copied address for execution. The new address of the kvm_exc_entry function cannot be recognized in ORC, which eventually leads to the arch_stack_walk_reliable function returning an error and printing an exception message. To solve the above problems, we directly compile the switch.S file into the kernel instead of the module. In this way, the function kvm_exc_entry will no longer need to be copied. changlog: V2<-V1: 1.Rollback the modification of function parameter types such as kvm_save_fpu. In the asm-prototypes.h header file, only the parameter types it depends on are included Cc: Huacai Chen <chenhuacai(a)kernel.org> Cc: WANG Xuerui <kernel(a)xen0n.name> Cc: Tianrui Zhao <zhaotianrui(a)loongson.cn> Cc: Bibo Mao <maobibo(a)loongson.cn> Cc: Charlie Jenkins <charlie(a)rivosinc.com> Cc: Xianglai Li <lixianglai(a)loongson.cn> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: stable(a)vger.kernel.org Xianglai Li (2): LoongArch: KVM: Compile the switch.S file directly into the kernel LoongArch: KVM: fix "unreliable stack" issue arch/loongarch/Kbuild | 2 +- arch/loongarch/include/asm/asm-prototypes.h | 21 +++++++++++++ arch/loongarch/include/asm/kvm_host.h | 3 -- arch/loongarch/kvm/Makefile | 2 +- arch/loongarch/kvm/main.c | 35 ++------------------- arch/loongarch/kvm/switch.S | 24 +++++++++++--- 6 files changed, 45 insertions(+), 42 deletions(-) base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 -- 2.39.1

2 weeks

[PATCH] drm/vmwgfx: Fix an error return check in vmw_compat_shader_add()

by Haoxiang Li

In vmw_compat_shader_add(), the return value check of vmw_shader_alloc() is not proper. Modify the check for the return pointer 'res'. Found by code review and compiled on ubuntu 20.04. Fixes: 18e4a4669c50 ("drm/vmwgfx: Fix compat shader namespace") Cc: stable(a)vger.kernel.org Signed-off-by: Haoxiang Li <lihaoxiang(a)isrc.iscas.ac.cn> --- drivers/gpu/drm/vmwgfx/vmwgfx_shader.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c b/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c index 69dfe69ce0f8..7ed938710342 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_shader.c @@ -923,8 +923,10 @@ int vmw_compat_shader_add(struct vmw_private *dev_priv, ttm_bo_unreserve(&buf->tbo); res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type); - if (unlikely(ret != 0)) + if (IS_ERR(res)) { + ret = PTR_ERR(res); goto no_reserve; + } ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_shader, vmw_shader_key(user_key, shader_type), -- 2.25.1

2 weeks

[PATCH] media: iris: Add missing platform data entries for SM8750

by Dikshita Agarwal

Two platform-data fields for SM8750 were missed: - get_vpu_buffer_size = iris_vpu33_buf_size Without this, the driver fails to allocate the required internal buffers, leading to basic decode/encode failures during session bring-up. - max_core_mbps = ((7680 * 4320) / 256) * 60 Without this capability exposed, capability checks are incomplete and v4l2-compliance for encoder fails. Fixes: a5925a2ce077 ("media: iris: add VPU33 specific encoding buffer calculation") Fixes: a6882431a138 ("media: iris: Add support for ENUM_FRAMESIZES/FRAMEINTERVALS for encoder") Cc: stable(a)vger.kernel.org Signed-off-by: Dikshita Agarwal <dikshita.agarwal(a)oss.qualcomm.com> --- drivers/media/platform/qcom/iris/iris_platform_gen2.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen2.c b/drivers/media/platform/qcom/iris/iris_platform_gen2.c index c1989240c248601c34b84f508f1b72d72f81260a..00d1d55463179429f2ae7554546dcbe4fb1431cc 100644 --- a/drivers/media/platform/qcom/iris/iris_platform_gen2.c +++ b/drivers/media/platform/qcom/iris/iris_platform_gen2.c @@ -915,6 +915,7 @@ const struct iris_platform_data sm8750_data = { .get_instance = iris_hfi_gen2_get_instance, .init_hfi_command_ops = iris_hfi_gen2_command_ops_init, .init_hfi_response_ops = iris_hfi_gen2_response_ops_init, + .get_vpu_buffer_size = iris_vpu33_buf_size, .vpu_ops = &iris_vpu35_ops, .set_preset_registers = iris_set_sm8550_preset_registers, .icc_tbl = sm8550_icc_table, @@ -945,6 +946,7 @@ const struct iris_platform_data sm8750_data = { .num_vpp_pipe = 4, .max_session_count = 16, .max_core_mbpf = NUM_MBS_8K * 2, + .max_core_mbps = ((7680 * 4320) / 256) * 60, .dec_input_config_params_default = sm8550_vdec_input_config_params_default, .dec_input_config_params_default_size = --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20251217-iris-sm8750-fix-2d42a133058d Best regards, -- Dikshita Agarwal <dikshita.agarwal(a)oss.qualcomm.com>

2 weeks

[PATCH v5.10-v6.1] drm/vmwgfx: Fix a null-ptr access in the cursor snooper

by Shivani Agarwal

From: Zack Rusin <zack.rusin(a)broadcom.com> [ Upstream commit 5ac2c0279053a2c5265d46903432fb26ae2d0da2 ] Check that the resource which is converted to a surface exists before trying to use the cursor snooper on it. vmw_cmd_res_check allows explicit invalid (SVGA3D_INVALID_ID) identifiers because some svga commands accept SVGA3D_INVALID_ID to mean "no surface", unfortunately functions that accept the actual surfaces as objects might (and in case of the cursor snooper, do not) be able to handle null objects. Make sure that we validate not only the identifier (via the vmw_cmd_res_check) but also check that the actual resource exists before trying to do something with it. Fixes unchecked null-ptr reference in the snooping code. Signed-off-by: Zack Rusin <zack.rusin(a)broadcom.com> Fixes: c0951b797e7d ("drm/vmwgfx: Refactor resource management") Reported-by: Kuzey Arda Bulut <kuzeyardabulut(a)gmail.com> Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list(a)broadcom.com> Cc: dri-devel(a)lists.freedesktop.org Reviewed-by: Ian Forbes <ian.forbes(a)broadcom.com> Link: https://lore.kernel.org/r/20250917153655.1968583-1-zack.rusin@broadcom.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> [Shivani: Modified to apply on v5.10.y-v6.1.y] Signed-off-by: Shivani Agarwal <shivani.agarwal(a)broadcom.com> --- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index 0d12d6af6..5d3827b5d 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -1507,6 +1507,7 @@ static int vmw_cmd_dma(struct vmw_private *dev_priv, SVGA3dCmdHeader *header) { struct vmw_buffer_object *vmw_bo = NULL; + struct vmw_resource *res; struct vmw_surface *srf = NULL; VMW_DECLARE_CMD_VAR(*cmd, SVGA3dCmdSurfaceDMA); int ret; @@ -1542,18 +1543,24 @@ static int vmw_cmd_dma(struct vmw_private *dev_priv, dirty = (cmd->body.transfer == SVGA3D_WRITE_HOST_VRAM) ? VMW_RES_DIRTY_SET : 0; - ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, - dirty, user_surface_converter, - &cmd->body.host.sid, NULL); + ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, dirty, + user_surface_converter, &cmd->body.host.sid, + NULL); if (unlikely(ret != 0)) { if (unlikely(ret != -ERESTARTSYS)) VMW_DEBUG_USER("could not find surface for DMA.\n"); return ret; } - srf = vmw_res_to_srf(sw_context->res_cache[vmw_res_surface].res); + res = sw_context->res_cache[vmw_res_surface].res; + if (!res) { + VMW_DEBUG_USER("Invalid DMA surface.\n"); + return -EINVAL; + } - vmw_kms_cursor_snoop(srf, sw_context->fp->tfile, &vmw_bo->base, header); + srf = vmw_res_to_srf(res); + vmw_kms_cursor_snoop(srf, sw_context->fp->tfile, &vmw_bo->base, + header); return 0; } -- 2.40.4

2 weeks

[PATCH 1/1] phy: tegra: xusb: Explicitly configure HS_DISCON_LEVEL to 0x7

by Wayne Chang

The USB2 Bias Pad Control register manages analog parameters for signal detection. Previously, the HS_DISCON_LEVEL relied on hardware reset values, which may lead to the detection failure. Explicitly configure HS_DISCON_LEVEL to 0x7. This ensures the disconnect threshold is sufficient to guarantee reliable detection. Fixes: bbf711682cd5 ("phy: tegra: xusb: Add Tegra186 support") Cc: stable(a)vger.kernel.org Signed-off-by: Wayne Chang <waynec(a)nvidia.com> --- drivers/phy/tegra/xusb-tegra186.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c index e818f6c3980e..bec9616c4a2e 100644 --- a/drivers/phy/tegra/xusb-tegra186.c +++ b/drivers/phy/tegra/xusb-tegra186.c @@ -84,6 +84,7 @@ #define XUSB_PADCTL_USB2_BIAS_PAD_CTL0 0x284 #define BIAS_PAD_PD BIT(11) #define HS_SQUELCH_LEVEL(x) (((x) & 0x7) << 0) +#define HS_DISCON_LEVEL(x) (((x) & 0x7) << 3) #define XUSB_PADCTL_USB2_BIAS_PAD_CTL1 0x288 #define USB2_TRK_START_TIMER(x) (((x) & 0x7f) << 12) @@ -623,6 +624,8 @@ static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl) value &= ~BIAS_PAD_PD; value &= ~HS_SQUELCH_LEVEL(~0); value |= HS_SQUELCH_LEVEL(priv->calib.hs_squelch); + value &= ~HS_DISCON_LEVEL(~0); + value |= HS_DISCON_LEVEL(0x7); padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL0); udelay(1); -- 2.25.1

2 weeks

[PATCH] ocfs2: Add check for total number of chains in chain list

by Prithvi Tambewagh

The functions ocfs2_reserve_suballoc_bits(), ocfs2_block_group_alloc(), ocfs2_block_group_alloc_contig() and ocfs2_find_smallest_chain() trust the on-disk values related to the allocation chain. However, KASAN bug was triggered in these functions, and the kernel panicked when accessing redzoned memory. This occurred due to the corrupted value of `cl_count` field of `struct ocfs2_chain_list`. Upon analysis, the value of `cl_count` was observed to be overwhemingly large, due to which the code accessed redzoned memory. The fix introduces an if statement which validates value of `cl_count` (both lower and upper bounds). Lower bound check ensures the value of `cl_count` is not zero and upper bound check ensures that the value of `cl_count` is in the range such that it has a value less than the total size of struct ocfs2_chain_list and maximum number of chains that can be present, so as to fill one block. Reported-by: syzbot+af14efe17dfa46173239(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=af14efe17dfa46173239 Tested-by: syzbot+af14efe17dfa46173239(a)syzkaller.appspotmail.com Cc: stable(a)vger.kernel.org Signed-off-by: Prithvi Tambewagh <activprithvi(a)gmail.com> --- fs/ocfs2/suballoc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index f7b483f0de2a..7ea63e9cc4f8 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -671,6 +671,21 @@ static int ocfs2_block_group_alloc(struct ocfs2_super *osb, BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode)); cl = &fe->id2.i_chain; + unsigned int block_size = osb->sb->s_blocksize; + unsigned int max_cl_count = + (block_size - offsetof(struct ocfs2_chain_list, cl_recs)) / + sizeof(struct ocfs2_chain_rec); + + if (!le16_to_cpu(cl->cl_count) || + le16_to_cpu(cl->cl_count) > max_cl_count) { + ocfs2_error(osb->sb, + "Invalid chain list: cl_count %u " + "exceeds max %u", + le16_to_cpu(cl->cl_count), max_cl_count); + status = -EIO; + goto bail; + } + status = ocfs2_reserve_clusters_with_limit(osb, le16_to_cpu(cl->cl_cpg), max_block, flags, &ac); base-commit: 36c254515dc6592c44db77b84908358979dd6b50 -- 2.34.1

2 weeks

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