diff mbox series

[5.10,65/86] arm_pmu: Validate single/group leader events

Message ID	20220426081743.084793776@linuxfoundation.org
State	Superseded
Headers	show Return-Path: <stable-owner@kernel.org> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Al Grant <al.grant@arm.com>, Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Rob Herring <robh@kernel.org> Subject: [PATCH 5.10 65/86] arm_pmu: Validate single/group leader events Date: Tue, 26 Apr 2022 10:21:33 +0200 Message-Id: <20220426081743.084793776@linuxfoundation.org> In-Reply-To: <20220426081741.202366502@linuxfoundation.org> References: <20220426081741.202366502@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	None \| expand [5.10,02/86] mm: page_alloc: fix building error on -Werror=array-compare [5.10,03/86] tracing: Dump stacktrace trigger to the corresponding instance [5.10,04/86] perf tools: Fix segfault accessing sample_id xyarray [5.10,05/86] gfs2: assign rgrp glock before compute_bitstructs [5.10,06/86] net/sched: cls_u32: fix netns refcount changes in u32_change() [5.10,07/86] ALSA: usb-audio: Clear MIDI port active flag after draining [5.10,08/86] ALSA: hda/realtek: Add quirk for Clevo NP70PNP [5.10,09/86] dm: fix mempool NULL pointer race when completing IO [5.10,10/86] ASoC: atmel: Remove system clock tree configuration for at91sam9g20ek [5.10,11/86] ASoC: msm8916-wcd-digital: Check failure for devm_snd_soc_register_component [5.10,12/86] ASoC: codecs: wcd934x: do not switch off SIDO Buck when codec is in use [5.10,13/86] dmaengine: imx-sdma: Fix error checking in sdma_event_remap [5.10,14/86] dmaengine: mediatek:Fix PM usage reference leak of mtk_uart_apdma_alloc_chan_resources [5.10,15/86] spi: spi-mtk-nor: initialize spi controller after resume [5.10,16/86] esp: limit skb_page_frag_refill use to a single page [5.10,17/86] igc: Fix infinite loop in release_swfw_sync [5.10,18/86] igc: Fix BUG: scheduling while atomic [5.10,19/86] rxrpc: Restore removed timer deletion [5.10,20/86] net/smc: Fix sock leak when release after smc_shutdown() [5.10,21/86] net/packet: fix packet_sock xmit return value checking [5.10,22/86] ip6_gre: Avoid updating tunnel->tun_hlen in __gre6_xmit() [5.10,23/86] ip6_gre: Fix skb_under_panic in __gre6_xmit() [5.10,24/86] net/sched: cls_u32: fix possible leak in u32_init_knode() [5.10,25/86] l3mdev: l3mdev_master_upper_ifindex_by_index_rcu should be using netdev_master_upper... [5.10,26/86] ipv6: make ip6_rt_gc_expire an atomic_t [5.10,27/86] netlink: reset network and mac headers in netlink_dump() [5.10,28/86] net: stmmac: Use readl_poll_timeout_atomic() in atomic state [5.10,29/86] dmaengine: idxd: add RO check for wq max_batch_size write [5.10,30/86] dmaengine: idxd: add RO check for wq max_transfer_size write [5.10,31/86] selftests: mlxsw: vxlan_flooding: Prevent flooding of unwanted packets [5.10,32/86] arm64/mm: Remove [PUD\|PMD]_TABLE_BIT from [pud\|pmd]_bad() [5.10,33/86] arm64: mm: fix p?d_leaf() [5.10,34/86] ARM: vexpress/spc: Avoid negative array index when !SMP [5.10,35/86] reset: tegra-bpmp: Restore Handle errors in BPMP response [5.10,36/86] platform/x86: samsung-laptop: Fix an unsigned comparison which can never be negative [5.10,37/86] ALSA: usb-audio: Fix undefined behavior due to shift overflowing the constant [5.10,38/86] arm64: dts: imx: Fix imx8*-var-som touchscreen property sizes [5.10,39/86] vxlan: fix error return code in vxlan_fdb_append [5.10,40/86] cifs: Check the IOCB_DIRECT flag, not O_DIRECT [5.10,41/86] net: atlantic: Avoid out-of-bounds indexing [5.10,42/86] mt76: Fix undefined behavior due to shift overflowing the constant [5.10,43/86] brcmfmac: sdio: Fix undefined behavior due to shift overflowing the constant [5.10,44/86] dpaa_eth: Fix missing of_node_put in dpaa_get_ts_info() [5.10,45/86] drm/msm/mdp5: check the return of kzalloc() [5.10,46/86] net: macb: Restart tx only if queue pointer is lagging [5.10,47/86] scsi: qedi: Fix failed disconnect handling [5.10,48/86] stat: fix inconsistency between struct stat and struct compat_stat [5.10,49/86] nvme: add a quirk to disable namespace identifiers [5.10,50/86] nvme-pci: disable namespace identifiers for Qemu controllers [5.10,51/86] EDAC/synopsys: Read the error count from the correct register [5.10,52/86] mm, hugetlb: allow for "high" userspace addresses [5.10,53/86] oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup [5.10,54/86] mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove() [5.10,55/86] ata: pata_marvell: Check the bmdma_addr beforing reading [5.10,56/86] dma: at_xdmac: fix a missing check on list iterator [5.10,57/86] net: atlantic: invert deep par in pm functions, preventing null derefs [5.10,58/86] xtensa: patch_text: Fixup last cpu should be master [5.10,59/86] xtensa: fix a7 clobbering in coprocessor context load/store [5.10,60/86] openvswitch: fix OOB access in reserve_sfa_size() [5.10,61/86] gpio: Request interrupts after IRQ is initialized [5.10,62/86] ASoC: soc-dapm: fix two incorrect uses of list iterator [5.10,63/86] e1000e: Fix possible overflow in LTR decoding [5.10,64/86] ARC: entry: fix syscall_trace_exit argument [5.10,65/86] arm_pmu: Validate single/group leader events [5.10,66/86] sched/pelt: Fix attach_entity_load_avg() corner case [5.10,67/86] perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled [5.10,68/86] drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not initialised [5.10,69/86] drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare [5.10,70/86] KVM: PPC: Fix TCE handling for VFIO [5.10,71/86] drm/vc4: Use pm_runtime_resume_and_get to fix pm_runtime_get_sync() usage [5.10,72/86] powerpc/perf: Fix power9 event alternatives [5.10,73/86] perf report: Set PERF_SAMPLE_DATA_SRC bit for Arm SPE event [5.10,74/86] ext4: fix fallocate to use file_modified to update permissions consistently [5.10,75/86] ext4: fix symlink file size not match to file content [5.10,76/86] ext4: fix use-after-free in ext4_search_dir [5.10,77/86] ext4: limit length to bitmap_maxbytes - blocksize in punch_hole [5.10,78/86] ext4, doc: fix incorrect h_reserved size [5.10,79/86] ext4: fix overhead calculation to account for the reserved gdt blocks [5.10,80/86] ext4: force overhead calculation if the s_overhead_cluster makes no sense [5.10,81/86] can: isotp: stop timeout monitoring when no first frame was sent [5.10,82/86] jbd2: fix a potential race while discarding reserved buffers after an abort [5.10,83/86] spi: atmel-quadspi: Fix the buswidth adjustment between spi-mem and controller [5.10,84/86] staging: ion: Prevent incorrect reference counting behavour [5.10,85/86] block/compat_ioctl: fix range check in BLKGETSIZE [5.10,86/86] Revert "net: micrel: fix KS8851_MLL Kconfig"

Commit Message

Greg Kroah-Hartman April 26, 2022, 8:21 a.m. UTC

From: Rob Herring <robh@kernel.org>

commit e5c23779f93d45e39a52758ca593bd7e62e9b4be upstream.

In the case where there is only a cycle counter available (i.e.
PMCR_EL0.N is 0) and an event other than CPU cycles is opened, the open
should fail as the event can never possibly be scheduled. However, the
event validation when an event is opened is skipped when the group
leader is opened. Fix this by always validating the group leader events.

Reported-by: Al Grant <al.grant@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220408203330.4014015-1-robh@kernel.org
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/perf/arm_pmu.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff mbox series

Patch

--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -398,6 +398,9 @@  validate_group(struct perf_event *event)
 	if (!validate_event(event->pmu, &fake_pmu, leader))
 		return -EINVAL;
 
+	if (event == leader)
+		return 0;
+
 	for_each_sibling_event(sibling, leader) {
 		if (!validate_event(event->pmu, &fake_pmu, sibling))
 			return -EINVAL;
@@ -487,12 +490,7 @@  __hw_perf_event_init(struct perf_event *
 		local64_set(&hwc->period_left, hwc->sample_period);
 	}
 
-	if (event->group_leader != event) {
-		if (validate_group(event) != 0)
-			return -EINVAL;
-	}
-
-	return 0;
+	return validate_group(event);
 }
 
 static int armpmu_event_init(struct perf_event *event)