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McKenney" , Catalin Marinas , Ben Copeland Subject: Re: next-20250729: PREEMPT_RT: rock Pi 4b Internal error Oops kmem_cache_alloc_bulk_noprof - kernel locking rtmutex.c at __rt_mutex_slowlock_locked Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: u11gx8a7pbpdjdm4t4gd1gic34itbgsq X-Rspamd-Queue-Id: 5F175180005 X-Rspamd-Server: rspam10 X-Rspam-User: X-HE-Tag: 1754652277-830885 X-HE-Meta: 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 p6HZrYwO VtBL1abmyKALsrm9q4cVbKURaTR73tTCcMYrqpvqoNofdX17Sr+Ou8UkCncBwOl6yH+c9rhf7JpWwy2XtpiVoMhLl07DdEyKYFMgsssLDW1vHqyiPaln4XPmKP9c1tsDaANQJYNFSv5OMXe1qLOpP60iGSqNGU6QER1NfxKCMtjwru6S/XOeo9hZfahl79M2ilx4EOom8uCcIy4oxu1MCnPX+9U8T/v6z6L37nt2hKcQG56dc6s2EAV8KxFQsDABSBchApZV0dKK1gn+AQQrDaBDbgBKpRdrtwCPIlS7LdNtYAsAKnDohAv9/zPTxeBmSVDn05FfhWgZfGc07YPDVxcZkfU9mJzVmNPyi5AMmUM8CdCkACUisCf4VR4N4jcM/SU3i X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Naresh, On Sat, Aug 02, 2025 at 03:45:51PM +0530, Naresh Kamboju wrote: > ## Test log > [ 527.570253] Unable to handle kernel paging request at virtual > address 003f0020f94020a1 > [ 527.570274] Mem abort info: > [ 527.570277] ESR = 0x0000000096000004 > [ 527.570282] EC = 0x25: DABT (current EL), IL = 32 bits > [ 527.570288] SET = 0, FnV = 0 > [ 527.570292] EA = 0, S1PTW = 0 > [ 527.570297] FSC = 0x04: level 0 translation fault > [ 527.570302] Data abort info: > [ 527.570305] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 > [ 527.570310] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 > [ 527.570316] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [ 527.570322] [003f0020f94020a1] address between user and kernel address ranges > [ 527.570330] Internal error: Oops: 0000000096000004 [#1] SMP > [ 527.570336] Modules linked in: brcmfmac rockchip_dfi brcmutil > cfg80211 snd_soc_hdmi_codec dw_hdmi_i2s_audio dw_hdmi_cec > snd_soc_simple_card snd_soc_audio_graph_card hci_uart > snd_soc_rockchip_i2s snd_soc_es8316 snd_soc_spdif_tx > snd_soc_simple_card_utils btqca rtc_rk808 rockchipdrm btbcm > snd_soc_core dw_hdmi_qp bluetooth snd_compress reset_gpio analogix_dp > snd_pcm_dmaengine panfrost hantro_vpu dw_mipi_dsi rfkill rockchip_rga > drm_shmem_helper drm_dp_aux_bus snd_pcm gpu_sched dw_hdmi pwrseq_core > videobuf2_dma_sg v4l2_vp9 snd_timer drm_display_helper v4l2_h264 > v4l2_jpeg phy_rockchip_pcie snd v4l2_mem2mem cec videobuf2_dma_contig > soundcore videobuf2_memops drm_client_lib videobuf2_v4l2 > drm_dma_helper videobuf2_common rockchip_saradc drm_kms_helper > industrialio_triggered_buffer kfifo_buf rockchip_thermal > pcie_rockchip_host coresight_cpu_debug fuse drm backlight > [ 527.570493] CPU: 3 UID: 0 PID: 34254 Comm: mkdir Not tainted > 6.16.0-next-20250801 #1 PREEMPT_RT > [ 527.570502] Hardware name: Radxa ROCK Pi 4B (DT) > [ 527.570506] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) > [ 527.570512] pc : kmem_cache_alloc_bulk_noprof (mm/slub.c:5343 > (discriminator 1) mm/slub.c:5403 (discriminator 1)) > [ 527.570527] lr : kmem_cache_alloc_bulk_noprof > (include/linux/atomic/atomic-arch-fallback.h:457 > include/linux/atomic/atomic-instrumented.h:33 > include/linux/kfence.h:127 mm/slub.c:5307 mm/slub.c:5403) > [ 527.570533] sp : ffff80008e24b8f0 > [ 527.570536] x29: ffff80008e24b930 x28: 00ff000000584610 x27: ffff800082b30538 > [ 527.570545] x26: ffff8000816b64dc x25: 0000000000000cc0 x24: 0000000000000000 > [ 527.570554] x23: 0000000000000004 x22: ffff0000f7579d20 x21: 0000000000000001 > [ 527.570563] x20: 0000000000000001 x19: ffff000000405b00 x18: ffff80008e24bcd0 > [ 527.570572] x17: 0000000000000000 x16: ffff800081e18420 x15: 0000ffffa2670fff > [ 527.570582] x14: 0000000000000000 x13: 1fffe000017942e1 x12: 0000ffffa2470fff > [ 527.570591] x11: ffff00000bca1708 x10: 0000000000000001 x9 : ffff8000816e41a4 > [ 527.570600] x8 : ffff80008e24b850 x7 : fefefefefefefefe x6 : ffff800082b30000 > [ 527.570608] x5 : d63f0020f9402021 x4 : ffff0000f7579d58 x3 : 0000000000000000 > [ 527.570617] x2 : 0000000000000000 x1 : 0000000000000100 x0 : 0000000000000080 > [ 527.570627] Call trace: > [ 527.570631] kmem_cache_alloc_bulk_noprof (mm/slub.c:5343 > (discriminator 1) mm/slub.c:5403 (discriminator 1)) (P) > [ 527.570639] mas_alloc_nodes (lib/maple_tree.c:1278) > [ 527.570651] mas_node_count_gfp (lib/maple_tree.c:1339) > [ 527.570661] mas_preallocate (lib/maple_tree.c:5538 (discriminator 1)) > [ 527.570667] __split_vma (mm/vma.c:528 (discriminator 1)) > [ 527.570677] vma_modify (mm/vma.c:1633) > [ 527.570685] vma_modify_flags (mm/vma.c:1650) > [ 527.570694] mprotect_fixup (mm/mprotect.c:819) > [ 527.570704] do_mprotect_pkey (mm/mprotect.c:993) > [ 527.570713] __arm64_sys_mprotect (mm/mprotect.c:1011) > [ 527.570722] invoke_syscall (arch/arm64/include/asm/current.h:19 > arch/arm64/kernel/syscall.c:54) > [ 527.570731] el0_svc_common.constprop.0 > (include/linux/thread_info.h:135 (discriminator 2) > arch/arm64/kernel/syscall.c:140 (discriminator 2)) > [ 527.570737] do_el0_svc (arch/arm64/kernel/syscall.c:152) > [ 527.570744] el0_svc (arch/arm64/include/asm/irqflags.h:82 > (discriminator 1) arch/arm64/include/asm/irqflags.h:123 (discriminator > 1) arch/arm64/include/asm/irqflags.h:136 (discriminator 1) > arch/arm64/kernel/entry-common.c:169 (discriminator 1) > arch/arm64/kernel/entry-common.c:182 (discriminator 1) > arch/arm64/kernel/entry-common.c:880 (discriminator 1)) > [ 527.570752] el0t_64_sync_handler (arch/arm64/kernel/entry-common.c:899) > [ 527.570760] el0t_64_sync (arch/arm64/kernel/entry.S:596) > [ 527.570772] Code: 1400000c f94002c5 b4000aa5 b9402a60 (f86068a0) > All code > ======== > 0: 1400000c b 0x30 > 4: f94002c5 ldr x5, [x22] > 8: b4000aa5 cbz x5, 0x15c > c: b9402a60 ldr w0, [x19, #40] > 10:* f86068a0 ldr x0, [x5, x0] <-- trapping instruction > > Code starting with the faulting instruction > =========================================== > 0: f86068a0 ldr x0, [x5, x0] > [ 527.570778] ---[ end trace 0000000000000000 ]--- > [ 527.570800] ------------[ cut here ]------------ If you're able to repro this, please could you see if the patch below helps at all? https://lore.kernel.org/r/20250806145611.3962-1-dev.jain@arm.com Cheers, Will