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[PATCH OLK-5.10 0/4] CVE-2023-52447
by Pu Lehui 19 Mar '24

19 Mar '24

Hou Tao (3): bpf: Add map and need_defer parameters to .map_fd_put_ptr() bpf: Set need_defer as false when clearing fd array during map free bpf: Defer the free of inner map when necessary Pu Lehui (1): bpf: Fix kabi breakage in struct bpf_map and struct bpf_map_ops include/linux/bpf.h | 18 +++++++++++++++--- kernel/bpf/arraymap.c | 33 ++++++++++++++++++++------------- kernel/bpf/hashtab.c | 6 +++--- kernel/bpf/map_in_map.c | 13 +++++++++---- kernel/bpf/map_in_map.h | 2 +- kernel/bpf/syscall.c | 23 +++++++++++++++++++++-- 6 files changed, 69 insertions(+), 26 deletions(-) -- 2.34.1

2 5

[PATCH OLK-6.6] powerpc/lib: Validate size for vector operations
by Zhu Wang 19 Mar '24

19 Mar '24

From: Naveen N Rao <naveen(a)kernel.org> mainline inclusion from mainline-v6.8-rc1 commit 8f9abaa6d7de0a70fc68acaedce290c1f96e2e59 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I96G83 CVE: CVE-2023-52606 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Some of the fp/vmx code in sstep.c assume a certain maximum size for the instructions being emulated. The size of those operations however is determined separately in analyse_instr(). Add a check to validate the assumption on the maximum size of the operations, so as to prevent any unintended kernel stack corruption. Signed-off-by: Naveen N Rao <naveen(a)kernel.org> Reviewed-by: Gustavo A. R. Silva <gustavoars(a)kernel.org> Build-tested-by: Gustavo A. R. Silva <gustavoars(a)kernel.org> Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au> Link: https://msgid.link/20231123071705.397625-1-naveen@kernel.org Signed-off-by: Zhu Wang <wangzhu9(a)huawei.com> --- arch/powerpc/lib/sstep.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index d81568f783e5..6c8531928274 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -473,6 +473,8 @@ static int do_fp_load(struct instruction_op *op, unsigned long ea, } u; nb = GETSIZE(op->type); + if (nb > sizeof(u)) + return -EINVAL; if (!address_ok(regs, ea, nb)) return -EFAULT; rn = op->reg; @@ -523,6 +525,8 @@ static int do_fp_store(struct instruction_op *op, unsigned long ea, } u; nb = GETSIZE(op->type); + if (nb > sizeof(u)) + return -EINVAL; if (!address_ok(regs, ea, nb)) return -EFAULT; rn = op->reg; @@ -567,6 +571,9 @@ static nokprobe_inline int do_vec_load(int rn, unsigned long ea, u8 b[sizeof(__vector128)]; } u = {}; + if (size > sizeof(u)) + return -EINVAL; + if (!address_ok(regs, ea & ~0xfUL, 16)) return -EFAULT; /* align to multiple of size */ @@ -594,6 +601,9 @@ static nokprobe_inline int do_vec_store(int rn, unsigned long ea, u8 b[sizeof(__vector128)]; } u; + if (size > sizeof(u)) + return -EINVAL; + if (!address_ok(regs, ea & ~0xfUL, 16)) return -EFAULT; /* align to multiple of size */ -- 2.34.1

2 1

[PATCH OLK-6.6 0/1] CVE-2023-52593
by Chen Ridong 19 Mar '24

19 Mar '24

*** BLURB HERE *** Dmitry Antipov (1): wifi: wfx: fix possible NULL pointer dereference in wfx_set_mfp_ap() drivers/net/wireless/silabs/wfx/sta.c | 42 ++++++++++++++++----------- 1 file changed, 25 insertions(+), 17 deletions(-) -- 2.34.1

2 2

[PATCH OLK-5.10] binder: fix race between mmput() and do_exit()
by Zheng Yejian 19 Mar '24

19 Mar '24

From: Carlos Llamas <cmllamas(a)google.com> stable inclusion from stable-v5.10.209 commit 7e7a0d86542b0ea903006d3f42f33c4f7ead6918 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I99JWJ CVE: CVE-2023-52609 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 9a9ab0d963621d9d12199df9817e66982582d5a5 upstream. Task A calls binder_update_page_range() to allocate and insert pages on a remote address space from Task B. For this, Task A pins the remote mm via mmget_not_zero() first. This can race with Task B do_exit() and the final mmput() refcount decrement will come from Task A. Task A | Task B ------------------+------------------ mmget_not_zero() | | do_exit() | exit_mm() | mmput() mmput() | exit_mmap() | remove_vma() | fput() | In this case, the work of ____fput() from Task B is queued up in Task A as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup work gets executed. However, Task A instead sleep, waiting for a reply from Task B that never comes (it's dead). This means the binder_deferred_release() is blocked until an unrelated binder event forces Task A to go back to userspace. All the associated death notifications will also be delayed until then. In order to fix this use mmput_async() that will schedule the work in the corresponding mm->async_put_work WQ instead of Task A. Fixes: 457b9a6f09f0 ("Staging: android: add binder driver") Reviewed-by: Alice Ryhl <aliceryhl(a)google.com> Signed-off-by: Carlos Llamas <cmllamas(a)google.com> Link: https://lore.kernel.org/r/20231201172212.1813387-4-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Lin Yujun <linyujun809(a)huawei.com> Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> --- drivers/android/binder_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 61406bfa454b..7bd086ab74c5 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -271,7 +271,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, } if (mm) { mmap_write_unlock(mm); - mmput(mm); + mmput_async(mm); } return 0; @@ -304,7 +304,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, err_no_vma: if (mm) { mmap_write_unlock(mm); - mmput(mm); + mmput_async(mm); } return vma ? -ENOMEM : -ESRCH; } -- 2.25.1

2 1

[PATCH OLK-6.6] s390/vfio-ap: always filter entire AP matrix
by Xiang Yang 19 Mar '24

19 Mar '24

From: Tony Krowiak <akrowiak(a)linux.ibm.com> mainline inclusion from mainline-v6.6.15 commit c69d821197611678533fb3eb784fc823b921349a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I97NH7 CVE: CVE-2024-26620 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11 upstream. The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID will be filtered from the mdev's matrix when updating the guest's AP configuration. Inspecting only the APID of the new adapter or APQI of the new domain will result in passing AP queues through to a guest that are not bound to the vfio_ap device driver under certain circumstances. Consider the following: guest's AP configuration (all also assigned to the mdev's matrix): 14.0004 14.0005 14.0006 16.0004 16.0005 16.0006 unassign domain 4 unbind queue 16.0005 assign domain 4 When domain 4 is re-assigned, since only domain 4 will be inspected, the APQNs that will be examined will be: 14.0004 16.0004 Since both of those APQNs reference queue devices that are bound to the vfio_ap device driver, nothing will get filtered from the mdev's matrix when updating the guest's AP configuration. Consequently, queue 16.0005 will get passed through despite not being bound to the driver. This violates the linux device model requirement that a guest shall only be given access to devices bound to the device driver facilitating their pass-through. To resolve this problem, every adapter and domain assigned to the mdev will be inspected when filtering the mdev's matrix. Signed-off-by: Tony Krowiak <akrowiak(a)linux.ibm.com> Acked-by: Halil Pasic <pasic(a)linux.ibm.com> Fixes: 48cae940c31d ("s390/vfio-ap: refresh guest's APCB by filtering AP resources assigned to mdev") Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/r/20240115185441.31526-2-akrowiak@linux.ibm.com Signed-off-by: Alexander Gordeev <agordeev(a)linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Xiang Yang <xiangyang3(a)huawei.com> --- drivers/s390/crypto/vfio_ap_ops.c | 57 +++++++++---------------------- 1 file changed, 17 insertions(+), 40 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 4db538a55192..9382b32e5bd1 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -670,8 +670,7 @@ static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev) * Return: a boolean value indicating whether the KVM guest's APCB was changed * by the filtering or not. */ -static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm, - struct ap_matrix_mdev *matrix_mdev) +static bool vfio_ap_mdev_filter_matrix(struct ap_matrix_mdev *matrix_mdev) { unsigned long apid, apqi, apqn; DECLARE_BITMAP(prev_shadow_apm, AP_DEVICES); @@ -692,8 +691,8 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm, bitmap_and(matrix_mdev->shadow_apcb.aqm, matrix_mdev->matrix.aqm, (unsigned long *)matrix_dev->info.aqm, AP_DOMAINS); - for_each_set_bit_inv(apid, apm, AP_DEVICES) { - for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) { + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, AP_DOMAINS) { /* * If the APQN is not bound to the vfio_ap device * driver, then we can't assign it to the guest's @@ -958,7 +957,6 @@ static ssize_t assign_adapter_store(struct device *dev, { int ret; unsigned long apid; - DECLARE_BITMAP(apm_delta, AP_DEVICES); struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev); mutex_lock(&ap_perms_mutex); @@ -987,11 +985,8 @@ static ssize_t assign_adapter_store(struct device *dev, } vfio_ap_mdev_link_adapter(matrix_mdev, apid); - memset(apm_delta, 0, sizeof(apm_delta)); - set_bit_inv(apid, apm_delta); - if (vfio_ap_mdev_filter_matrix(apm_delta, - matrix_mdev->matrix.aqm, matrix_mdev)) + if (vfio_ap_mdev_filter_matrix(matrix_mdev)) vfio_ap_mdev_update_guest_apcb(matrix_mdev); ret = count; @@ -1167,7 +1162,6 @@ static ssize_t assign_domain_store(struct device *dev, { int ret; unsigned long apqi; - DECLARE_BITMAP(aqm_delta, AP_DOMAINS); struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev); mutex_lock(&ap_perms_mutex); @@ -1196,11 +1190,8 @@ static ssize_t assign_domain_store(struct device *dev, } vfio_ap_mdev_link_domain(matrix_mdev, apqi); - memset(aqm_delta, 0, sizeof(aqm_delta)); - set_bit_inv(apqi, aqm_delta); - if (vfio_ap_mdev_filter_matrix(matrix_mdev->matrix.apm, aqm_delta, - matrix_mdev)) + if (vfio_ap_mdev_filter_matrix(matrix_mdev)) vfio_ap_mdev_update_guest_apcb(matrix_mdev); ret = count; @@ -2091,9 +2082,7 @@ int vfio_ap_mdev_probe_queue(struct ap_device *apdev) if (matrix_mdev) { vfio_ap_mdev_link_queue(matrix_mdev, q); - if (vfio_ap_mdev_filter_matrix(matrix_mdev->matrix.apm, - matrix_mdev->matrix.aqm, - matrix_mdev)) + if (vfio_ap_mdev_filter_matrix(matrix_mdev)) vfio_ap_mdev_update_guest_apcb(matrix_mdev); } dev_set_drvdata(&apdev->device, q); @@ -2443,34 +2432,22 @@ void vfio_ap_on_cfg_changed(struct ap_config_info *cur_cfg_info, static void vfio_ap_mdev_hot_plug_cfg(struct ap_matrix_mdev *matrix_mdev) { - bool do_hotplug = false; - int filter_domains = 0; - int filter_adapters = 0; - DECLARE_BITMAP(apm, AP_DEVICES); - DECLARE_BITMAP(aqm, AP_DOMAINS); + bool filter_domains, filter_adapters, filter_cdoms, do_hotplug = false; mutex_lock(&matrix_mdev->kvm->lock); mutex_lock(&matrix_dev->mdevs_lock); - filter_adapters = bitmap_and(apm, matrix_mdev->matrix.apm, - matrix_mdev->apm_add, AP_DEVICES); - filter_domains = bitmap_and(aqm, matrix_mdev->matrix.aqm, - matrix_mdev->aqm_add, AP_DOMAINS); - - if (filter_adapters && filter_domains) - do_hotplug |= vfio_ap_mdev_filter_matrix(apm, aqm, matrix_mdev); - else if (filter_adapters) - do_hotplug |= - vfio_ap_mdev_filter_matrix(apm, - matrix_mdev->shadow_apcb.aqm, - matrix_mdev); - else - do_hotplug |= - vfio_ap_mdev_filter_matrix(matrix_mdev->shadow_apcb.apm, - aqm, matrix_mdev); + filter_adapters = bitmap_intersects(matrix_mdev->matrix.apm, + matrix_mdev->apm_add, AP_DEVICES); + filter_domains = bitmap_intersects(matrix_mdev->matrix.aqm, + matrix_mdev->aqm_add, AP_DOMAINS); + filter_cdoms = bitmap_intersects(matrix_mdev->matrix.adm, + matrix_mdev->adm_add, AP_DOMAINS); + + if (filter_adapters || filter_domains) + do_hotplug = vfio_ap_mdev_filter_matrix(matrix_mdev); - if (bitmap_intersects(matrix_mdev->matrix.adm, matrix_mdev->adm_add, - AP_DOMAINS)) + if (filter_cdoms) do_hotplug |= vfio_ap_mdev_filter_cdoms(matrix_mdev); if (do_hotplug) -- 2.34.1

2 1

[PATCH openEuler-1.0-LTS 0/3] CVE-2021-47114
by Yifan Qiao 19 Mar '24

19 Mar '24

Junxiao Bi (3): ocfs2: fix data corruption by fallocate ocfs2: fix zero out valid data ocfs2: issue zeroout to EOF blocks fs/ocfs2/file.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 70 insertions(+), 4 deletions(-) -- 2.39.2

2 4

[PATCH openEuler-1.0-LTS] binder: fix race between mmput() and do_exit()
by Zheng Yejian 19 Mar '24

19 Mar '24

From: Carlos Llamas <cmllamas(a)google.com> stable inclusion from stable-v4.19.306 commit 95b1d336b0642198b56836b89908d07b9a0c9608 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I99JWJ CVE: CVE-2023-52609 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit 9a9ab0d963621d9d12199df9817e66982582d5a5 upstream. Task A calls binder_update_page_range() to allocate and insert pages on a remote address space from Task B. For this, Task A pins the remote mm via mmget_not_zero() first. This can race with Task B do_exit() and the final mmput() refcount decrement will come from Task A. Task A | Task B ------------------+------------------ mmget_not_zero() | | do_exit() | exit_mm() | mmput() mmput() | exit_mmap() | remove_vma() | fput() | In this case, the work of ____fput() from Task B is queued up in Task A as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup work gets executed. However, Task A instead sleep, waiting for a reply from Task B that never comes (it's dead). This means the binder_deferred_release() is blocked until an unrelated binder event forces Task A to go back to userspace. All the associated death notifications will also be delayed until then. In order to fix this use mmput_async() that will schedule the work in the corresponding mm->async_put_work WQ instead of Task A. Fixes: 457b9a6f09f0 ("Staging: android: add binder driver") Reviewed-by: Alice Ryhl <aliceryhl(a)google.com> Signed-off-by: Carlos Llamas <cmllamas(a)google.com> Link: https://lore.kernel.org/r/20231201172212.1813387-4-cmllamas@google.com [cmllamas: fix trivial conflict with missing d8ed45c5dcd4.] Signed-off-by: Carlos Llamas <cmllamas(a)google.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> --- drivers/android/binder_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index d866a70cba7b..6f073d7fd7c6 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -281,7 +281,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, } if (mm) { up_read(&mm->mmap_sem); - mmput(mm); + mmput_async(mm); } return 0; @@ -314,7 +314,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, err_no_vma: if (mm) { up_read(&mm->mmap_sem); - mmput(mm); + mmput_async(mm); } return vma ? -ENOMEM : -ESRCH; } -- 2.25.1

2 1

[PATCH OLK-5.10 0/1] CVE-2023-52593 wifi
by Chen Ridong 19 Mar '24

19 Mar '24

*** BLURB HERE *** Chen Ridong (1): wifi: wfx: fix possible NULL pointer dereference in wfx_set_mfp_ap() drivers/staging/wfx/sta.c | 42 ++++++++++++++++++++++----------------- 1 file changed, 24 insertions(+), 18 deletions(-) -- 2.34.1

2 2

[PATCH V4 OLK-6.6] iommu/iova: avoid softlockup in fq_flush_timeout
by Zhang Zekun 19 Mar '24

19 Mar '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8ZE0I CVE: NA -------------------------------- There is a softlockup undering cpu pressure test. ... pc : _raw_spin_unlock_irqrestore+0x14/0x78 lr : fq_flush_timeout+0x94/0x118 ... Call trace: _raw_spin_unlock_irqrestore+0x14/0x78 call_timer_fn+0x3c/0x1d0 expire_timers+0xcc/0x190 run_timer_softirq+0xfc/0x268 __do_softirq+0x128/0x3dc ____do_softirq+0x18/0x30 call_on_irq_stack+0x24/0x30 do_softirq_own_stack+0x24/0x38 irq_exit_rcu+0xc0/0xe8 el1_interrupt+0x48/0xc0 el1h_64_irq_handler+0x18/0x28 el1h_64_irq+0x78/0x80 __schedule+0xf28/0x12a0 schedule+0x3c/0x108 schedule_timeout+0xa0/0x1d0 pktgen_thread_worker+0x1180/0x15d0 kthread+0x120/0x130 ret_from_fork+0x10/0x20 This is because the timer callback fq_flush_timeout may run more than 10ms, and timer may be processed continuously in the softirq so trigger softlockup. We can use work to deal with fq_ring_free for each cpu which may take long time, that to avoid triggering softlockup. Signed-off-by: Li Bin <huawei.libin(a)huawei.com> Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- v4: - fix code check warnings. drivers/iommu/dma-iommu.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 037fcf826407..06ccdda6173b 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -85,6 +85,8 @@ struct iommu_dma_cookie { /* Options for dma-iommu use */ struct iommu_dma_options options; struct mutex mutex; + + struct work_struct free_iova_work; }; static DEFINE_STATIC_KEY_FALSE(iommu_deferred_attach_enabled); @@ -184,17 +186,11 @@ static void fq_flush_iotlb(struct iommu_dma_cookie *cookie) static void fq_flush_timeout(struct timer_list *t) { struct iommu_dma_cookie *cookie = from_timer(cookie, t, fq_timer); - int cpu; atomic_set(&cookie->fq_timer_on, 0); fq_flush_iotlb(cookie); - if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) { - fq_ring_free(cookie, cookie->single_fq); - } else { - for_each_possible_cpu(cpu) - fq_ring_free(cookie, per_cpu_ptr(cookie->percpu_fq, cpu)); - } + schedule_work(&cookie->free_iova_work); } static void queue_iova(struct iommu_dma_cookie *cookie, @@ -279,6 +275,7 @@ static void iommu_dma_free_fq(struct iommu_dma_cookie *cookie) return; del_timer_sync(&cookie->fq_timer); + flush_work(&cookie->free_iova_work); if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) iommu_dma_free_fq_single(cookie->single_fq); else @@ -330,6 +327,21 @@ static int iommu_dma_init_fq_percpu(struct iommu_dma_cookie *cookie) return 0; } +static void free_iova_work_func(struct work_struct *work) +{ + struct iommu_dma_cookie *cookie; + int cpu; + + cookie = container_of(work, struct iommu_dma_cookie, free_iova_work); + if (cookie->options.qt == IOMMU_DMA_OPTS_SINGLE_QUEUE) { + fq_ring_free(cookie, cookie->single_fq); + } else { + for_each_possible_cpu(cpu) + fq_ring_free(cookie, per_cpu_ptr(cookie->percpu_fq, cpu)); + } + +} + /* sysfs updates are serialised by the mutex of the group owning @domain */ int iommu_dma_init_fq(struct iommu_domain *domain) { @@ -352,6 +364,7 @@ int iommu_dma_init_fq(struct iommu_domain *domain) return -ENOMEM; } + INIT_WORK(&cookie->free_iova_work, free_iova_work_func); timer_setup(&cookie->fq_timer, fq_flush_timeout, 0); atomic_set(&cookie->fq_timer_on, 0); /* -- 2.17.1

2 1

[PATCH OLK-6.6] iommu/arm-smmu-v3: Disable ECMDQ before reset
by Wang Wensheng 19 Mar '24

19 Mar '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I97CSY -------------------------------- In kdump kernel, the ECMDQ is enabled before and cannot be reset before it is disabled. This leads to "CMD_SYNC timeout" problem. Disable the ECMDQ before reset the ECMDQ to fix. Signed-off-by: Wang Wensheng <wangwensheng4(a)huawei.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 3d3e0c935023..4b006590ae05 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3869,6 +3869,20 @@ static int arm_smmu_ecmdq_reset(struct arm_smmu_device *smmu) q->llq.prod = 0; q->llq.cons = 0; } + + reg = readl(q->prod_reg); + if (reg & ECMDQ_PROD_EN) { + /* disable ecmdq */ + writel(reg & ~ECMDQ_PROD_EN, q->prod_reg); + ret = readl_relaxed_poll_timeout(q->cons_reg, reg, + !(reg & ECMDQ_CONS_ENACK), 1, ARM_SMMU_POLL_TIMEOUT_US); + if (ret) { + dev_warn(smmu->dev, "ecmdq[%d] disable failed\n", i); + smmu->ecmdq_enabled = 0; + return ret; + } + } + writeq_relaxed(q->q_base, ecmdq->base + ARM_SMMU_ECMDQ_BASE); writel_relaxed(q->llq.prod, ecmdq->base + ARM_SMMU_ECMDQ_PROD); writel_relaxed(q->llq.cons, ecmdq->base + ARM_SMMU_ECMDQ_CONS); -- 2.17.1

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