April 2025 - Linux-stable-mirror

Request for backporting c4af66a95aa3 ("cgroup/rstat: Fix forceidle time in cpu.stat")

by Tejun Heo

Hello, c4af66a95aa3 ("cgroup/rstat: Fix forceidle time in cpu.stat") fixes b824766504e4 ("cgroup/rstat: add force idle show helper") and should be backported to v6.11+ but I forgot to add the tag and the patch is currently queued in cgroup/for-6.15. Once the cgroup pull request is merged, can you please include the commit in -stable backports? Thanks. -- tejun

4 months, 2 weeks

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[PATCH] PCI: Add ACS quirk for Loongson PCIe

by Huacai Chen

Loongson PCIe Root Ports don't advertise an ACS capability, but they do not allow peer-to-peer transactions between Root Ports. Add an ACS quirk so each Root Port can be in a separate IOMMU group. Cc: stable(a)vger.kernel.org Signed-off-by: Xianglai Li <lixianglai(a)loongson.cn> Signed-off-by: Huacai Chen <chenhuacai(a)loongson.cn> --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 8d610c17e0f2..d52ec85f3382 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4995,6 +4995,18 @@ static int pci_quirk_brcm_acs(struct pci_dev *dev, u16 acs_flags) PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF); } +static int pci_quirk_loongson_acs(struct pci_dev *dev, u16 acs_flags) +{ + /* + * Loongson PCIe Root Ports don't advertise an ACS capability, but + * they do not allow peer-to-peer transactions between Root Ports. + * Allow each Root Port to be in a separate IOMMU group by masking + * SV/RR/CR/UF bits. + */ + return pci_acs_ctrl_enabled(acs_flags, + PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF); +} + /* * Wangxun 40G/25G/10G/1G NICs have no ACS capability, but on * multi-function devices, the hardware isolates the functions by @@ -5128,6 +5140,9 @@ static const struct pci_dev_acs_enabled { { PCI_VENDOR_ID_BROADCOM, 0x1762, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0x1763, pci_quirk_mf_endpoint_acs }, { PCI_VENDOR_ID_BROADCOM, 0xD714, pci_quirk_brcm_acs }, + /* Loongson PCIe Root Ports */ + { PCI_VENDOR_ID_LOONGSON, 0x3C09, pci_quirk_loongson_acs }, + { PCI_VENDOR_ID_LOONGSON, 0x3C19, pci_quirk_loongson_acs }, /* Amazon Annapurna Labs */ { PCI_VENDOR_ID_AMAZON_ANNAPURNA_LABS, 0x0031, pci_quirk_al_acs }, /* Zhaoxin multi-function devices */ -- 2.47.1

4 months, 2 weeks

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[GIT PULL] virtio: features, fixes, cleanups

by Michael S. Tsirkin

The following changes since commit d082ecbc71e9e0bf49883ee4afd435a77a5101b6: Linux 6.14-rc4 (2025-02-23 12:32:57 -0800) are available in the Git repository at: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus for you to fetch changes up to 9d8960672d63db4b3b04542f5622748b345c637a: vhost-scsi: Reduce response iov mem use (2025-02-25 07:10:46 -0500) ---------------------------------------------------------------- virtio: features, fixes, cleanups A small number of improvements all over the place: shutdown has been reworked to reset devices. virtio fs is now allowed in vduse. vhost-scsi memory use has been reduced. cleanups, fixes all over the place. A couple more fixes are being tested and will be merged after rc1. Signed-off-by: Michael S. Tsirkin <mst(a)redhat.com> ---------------------------------------------------------------- Eugenio Pérez (1): vduse: add virtio_fs to allowed dev id John Stultz (1): sound/virtio: Fix cancel_sync warnings on uninitialized work_structs Konstantin Shkolnyy (1): vdpa/mlx5: Fix mlx5_vdpa_get_config() endianness on big-endian machines Michael S. Tsirkin (1): virtio: break and reset virtio devices on device_shutdown() Mike Christie (9): vhost-scsi: Fix handling of multiple calls to vhost_scsi_set_endpoint vhost-scsi: Reduce mem use by moving upages to per queue vhost-scsi: Allocate T10 PI structs only when enabled vhost-scsi: Add better resource allocation failure handling vhost-scsi: Return queue full for page alloc failures during copy vhost-scsi: Dynamically allocate scatterlists vhost-scsi: Stop duplicating se_cmd fields vhost-scsi: Allocate iov_iter used for unaligned copies when needed vhost-scsi: Reduce response iov mem use Si-Wei Liu (1): vdpa/mlx5: Fix oversized null mkey longer than 32bit Yufeng Wang (3): tools/virtio: Add DMA_MAPPING_ERROR and sg_dma_len api define for virtio test tools: virtio/linux/compiler.h: Add data_race() define. tools: virtio/linux/module.h add MODULE_DESCRIPTION() define. drivers/vdpa/mlx5/core/mr.c | 7 +- drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 + drivers/vdpa/vdpa_user/vduse_dev.c | 1 + drivers/vhost/Kconfig | 1 + drivers/vhost/scsi.c | 549 +++++++++++++++++++++++-------------- drivers/virtio/virtio.c | 29 ++ sound/virtio/virtio_pcm.c | 21 +- tools/virtio/linux/compiler.h | 25 ++ tools/virtio/linux/dma-mapping.h | 13 + tools/virtio/linux/module.h | 7 + 10 files changed, 439 insertions(+), 217 deletions(-)

4 months, 2 weeks

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[PATCH 6.1.y 0/7] Backported patches to fix selftest tpdir2

by Kang Wenlin

From: Wenlin Kang <wenlin.kang(a)windriver.com> The selftest tpdir2 terminated with a 'Segmentation fault' during loading. root@localhost:~# cd linux-kenel/tools/testing/selftests/arm64/abi && make root@localhost:~/linux-kernel/tools/testing/selftests/arm64/abi# ./tpidr2 Segmentation fault The cause of this is the __arch_clear_user() failure. load_elf_binary() [fs/binfmt_elf.c] -> if (likely(elf_bss != elf_brk) && unlikely(padzero(elf_bes))) -> padzero() -> clear_user() [arch/arm64/include/asm/uaccess.h] -> __arch_clear_user() [arch/arm64/lib/clear_user.S] For more details, please see: https://lore.kernel.org/lkml/1d0342f3-0474-482b-b6db-81ca7820a462@t-8ch.de/… This issue has been fixed in the mainline. Here I have backported the relevant commits for the linux-6.1.y branch and attached them. With these patches, tpdir2 works as: root@localhost:~/linux-kernel/tools/testing/selftests/arm64/abi# ./tpidr2 TAP version 13 1..5 ok 0 skipped, TPIDR2 not supported ok 1 skipped, TPIDR2 not supported ok 2 skipped, TPIDR2 not supported ok 3 skipped, TPIDR2 not supported ok 4 skipped, TPIDR2 not supported The first patch is just for alignment to apply the follow patches. This issue is resolved by the second patch. However, to ensure functional completeness, all related patches were backported according to the following link. https://lore.kernel.org/all/20230929031716.it.155-kees@kernel.org/#t Bo Liu (1): binfmt_elf: replace IS_ERR() with IS_ERR_VALUE() Eric W. Biederman (1): binfmt_elf: Support segments with 0 filesz and misaligned starts Kees Cook (5): binfmt_elf: elf_bss no longer used by load_elf_binary() binfmt_elf: Use elf_load() for interpreter binfmt_elf: Use elf_load() for library binfmt_elf: Only report padzero() errors when PROT_WRITE mm: Remove unused vm_brk() fs/binfmt_elf.c | 221 ++++++++++++++++----------------------------- include/linux/mm.h | 3 +- mm/mmap.c | 6 -- mm/nommu.c | 5 - 4 files changed, 79 insertions(+), 156 deletions(-) -- 2.39.2

4 months, 2 weeks

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[PATCH] media: gspca: Add error handling for stv06xx_read_sensor()

by Wentao Liang

In hdcs_init(), the return value of stv06xx_read_sensor() needs to be checked. A proper implementation can be found in vv6410_dump(). Add a check in loop condition and propergate error code to fix this issue. Fixes: 4c98834addfe ("V4L/DVB (10048): gspca - stv06xx: New subdriver.") Cc: stable(a)vger.kernel.org # v2.6+ Signed-off-by: Wentao Liang <vulab(a)iscas.ac.cn> --- drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c b/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c index 5a47dcbf1c8e..303b055fefea 100644 --- a/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c +++ b/drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c @@ -520,12 +520,13 @@ static int hdcs_init(struct sd *sd) static int hdcs_dump(struct sd *sd) { u16 reg, val; + int err = 0; pr_info("Dumping sensor registers:\n"); - for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) { - stv06xx_read_sensor(sd, reg, &val); + for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH && !err; reg++) { + err = stv06xx_read_sensor(sd, reg, &val); pr_info("reg 0x%02x = 0x%02x\n", reg, val); } - return 0; + return (err < 0) ? err : 0; } -- 2.42.0.windows.2

4 months, 2 weeks

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[for-linus][PATCH 4/4] tracing: Verify event formats that have "%*p.."

by Steven Rostedt

From: Steven Rostedt <rostedt(a)goodmis.org> The trace event verifier checks the formats of trace events to make sure that they do not point at memory that is not in the trace event itself or in data that will never be freed. If an event references data that was allocated when the event triggered and that same data is freed before the event is read, then the kernel can crash by reading freed memory. The verifier runs at boot up (or module load) and scans the print formats of the events and checks their arguments to make sure that dereferenced pointers are safe. If the format uses "%*p.." the verifier will ignore it, and that could be dangerous. Cover this case as well. Also add to the sample code a use case of "%*pbl". Link: https://lore.kernel.org/all/bcba4d76-2c3f-4d11-baf0-02905db953dd@oracle.com/ Cc: stable(a)vger.kernel.org Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Fixes: 5013f454a352c ("tracing: Add check of trace event print fmts for dereferencing pointers") Link: https://lore.kernel.org/20250327195311.2d89ec66@gandalf.local.home Reported-by: Libo Chen <libo.chen(a)oracle.com> Reviewed-by: Libo Chen <libo.chen(a)oracle.com> Tested-by: Libo Chen <libo.chen(a)oracle.com> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- kernel/trace/trace_events.c | 7 +++++++ samples/trace_events/trace-events-sample.h | 8 ++++++-- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 8638b7f7ff85..069e92856bda 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -470,6 +470,7 @@ static void test_event_printk(struct trace_event_call *call) case '%': continue; case 'p': + do_pointer: /* Find dereferencing fields */ switch (fmt[i + 1]) { case 'B': case 'R': case 'r': @@ -498,6 +499,12 @@ static void test_event_printk(struct trace_event_call *call) continue; if (fmt[i + j] == '*') { star = true; + /* Handle %*pbl case */ + if (!j && fmt[i + 1] == 'p') { + arg++; + i++; + goto do_pointer; + } continue; } if ((fmt[i + j] == 's')) { diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h index 999f78d380ae..1a05fc153353 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -319,7 +319,8 @@ TRACE_EVENT(foo_bar, __assign_cpumask(cpum, cpumask_bits(mask)); ), - TP_printk("foo %s %d %s %s %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar, + TP_printk("foo %s %d %s %s %s %s %s %s (%s) (%s) %s [%d] %*pbl", + __entry->foo, __entry->bar, /* * Notice here the use of some helper functions. This includes: @@ -370,7 +371,10 @@ TRACE_EVENT(foo_bar, __get_str(str), __get_str(lstr), __get_bitmask(cpus), __get_cpumask(cpum), - __get_str(vstr)) + __get_str(vstr), + __get_dynamic_array_len(cpus), + __get_dynamic_array_len(cpus), + __get_dynamic_array(cpus)) ); /* -- 2.47.2

4 months, 2 weeks

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[for-linus][PATCH 3/4] ftrace: Add cond_resched() to ftrace_graph_set_hash()

by Steven Rostedt

From: zhoumin <teczm(a)foxmail.com> When the kernel contains a large number of functions that can be traced, the loop in ftrace_graph_set_hash() may take a lot of time to execute. This may trigger the softlockup watchdog. Add cond_resched() within the loop to allow the kernel to remain responsive even when processing a large number of functions. This matches the cond_resched() that is used in other locations of the code that iterates over all functions that can be traced. Cc: stable(a)vger.kernel.org Fixes: b9b0c831bed26 ("ftrace: Convert graph filter to use hash tables") Link: https://lore.kernel.org/tencent_3E06CE338692017B5809534B9C5C03DA7705@qq.com Signed-off-by: zhoumin <teczm(a)foxmail.com> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- kernel/trace/ftrace.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 92015de6203d..1a48aedb5255 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -6855,6 +6855,7 @@ ftrace_graph_set_hash(struct ftrace_hash *hash, char *buffer) } } } + cond_resched(); } while_for_each_ftrace_rec(); return fail ? -EINVAL : 0; -- 2.47.2

4 months, 2 weeks

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[PATCH v2] usb: dwc3: gadget: check that event count does not exceed event buffer length

by Frode Isaksen

From: Frode Isaksen <frode(a)meta.com> The event count is read from register DWC3_GEVNTCOUNT. There is a check for the count being zero, but not for exceeding the event buffer length. Check that event count does not exceed event buffer length, avoiding an out-of-bounds access when memcpy'ing the event. Crash log: Unable to handle kernel paging request at virtual address ffffffc0129be000 pc : __memcpy+0x114/0x180 lr : dwc3_check_event_buf+0xec/0x348 x3 : 0000000000000030 x2 : 000000000000dfc4 x1 : ffffffc0129be000 x0 : ffffff87aad60080 Call trace: __memcpy+0x114/0x180 dwc3_interrupt+0x24/0x34 Signed-off-by: Frode Isaksen <frode(a)meta.com> Fixes: ebbb2d59398f ("usb: dwc3: gadget: use evt->cache for processing events") Cc: stable(a)vger.kernel.org --- v1->v2: added error log drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 89a4dc8ebf94..923737776d82 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -4564,6 +4564,12 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) if (!count) return IRQ_NONE; + if (count > evt->length) { + dev_err(dwc->dev, "invalid count(%u) > evt->length(%u)\n", + count, evt->length); + return IRQ_NONE; + } + evt->count = count; evt->flags |= DWC3_EVENT_PENDING; -- 2.49.0

4 months, 2 weeks

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[PATCH 3/4] drm/i915/gem: Allow EXEC_CAPTURE on recoverable contexts on DG1

by Ville Syrjala

From: Ville Syrjälä <ville.syrjala(a)linux.intel.com> The intel-media-driver is currently broken on DG1 because it uses EXEC_CAPTURE with recovarable contexts. Relax the check to allow that. I've also submitted a fix for the intel-media-driver: https://github.com/intel/media-driver/pull/1920 Cc: stable(a)vger.kernel.org Cc: Matthew Auld <matthew.auld(a)intel.com> Cc: Thomas Hellström <thomas.hellstrom(a)linux.intel.com> Fixes: 71b1669ea9bd ("drm/i915/uapi: tweak error capture on recoverable contexts") Signed-off-by: Ville Syrjälä <ville.syrjala(a)linux.intel.com> --- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index ca7e9216934a..ea9d5063ce78 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -2013,7 +2013,7 @@ static int eb_capture_stage(struct i915_execbuffer *eb) continue; if (i915_gem_context_is_recoverable(eb->gem_context) && - (IS_DGFX(eb->i915) || GRAPHICS_VER_FULL(eb->i915) > IP_VER(12, 0))) + GRAPHICS_VER_FULL(eb->i915) > IP_VER(12, 10)) return -EINVAL; for_each_batch_create_order(eb, j) { -- 2.45.3

4 months, 2 weeks

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[PATCH v5 4/4] ring-buffer: Use flush_kernel_vmap_range() over flush_dcache_folio()

by Steven Rostedt

From: Steven Rostedt <rostedt(a)goodmis.org> Some architectures do not have data cache coherency between user and kernel space. For these architectures, the cache needs to be flushed on both the kernel and user addresses so that user space can see the updates the kernel has made. Instead of using flush_dcache_folio() and playing with virt_to_folio() within the call to that function, use flush_kernel_vmap_range() which takes the virtual address and does the work for those architectures that need it. This also fixes a bug where the flush of the reader page only flushed one page. If the sub-buffer order is 1 or more, where the sub-buffer size would be greater than a page, it would miss the rest of the sub-buffer content, as the "reader page" is not just a page, but the size of a sub-buffer. Link: https://lore.kernel.org/all/CAG48ez3w0my4Rwttbc5tEbNsme6tc0mrSN95thjXUFaJ3a… Cc: stable(a)vger.kernel.org Fixes: 117c39200d9d7 ("ring-buffer: Introducing ring-buffer mapping functions"); Suggested-by: Jann Horn <jannh(a)google.com> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- kernel/trace/ring_buffer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index d8d7b28e2c2f..c0f877d39a24 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -6016,7 +6016,7 @@ static void rb_update_meta_page(struct ring_buffer_per_cpu *cpu_buffer) meta->read = cpu_buffer->read; /* Some archs do not have data cache coherency between kernel and user-space */ - flush_dcache_folio(virt_to_folio(cpu_buffer->meta_page)); + flush_kernel_vmap_range(cpu_buffer->meta_page, PAGE_SIZE); } static void @@ -7319,7 +7319,8 @@ int ring_buffer_map_get_reader(struct trace_buffer *buffer, int cpu) out: /* Some archs do not have data cache coherency between kernel and user-space */ - flush_dcache_folio(virt_to_folio(cpu_buffer->reader_page->page)); + flush_kernel_vmap_range(cpu_buffer->reader_page->page, + buffer->subbuf_size + BUF_PAGE_HDR_SIZE); rb_update_meta_page(cpu_buffer); -- 2.47.2

4 months, 2 weeks

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Linux-stable-mirror April 2025