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linux/drivers/gpu/drm/imagination
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Brajesh Gupta 5dfd429591
drm/imagination: Fix segfault when updating ftrace mask 
Fix invalid data access by passing right data for debugfs entry.

[  171.549793] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[  171.559248] Mem abort info:
[  171.562173]   ESR = 0x0000000096000044
[  171.566227]   EC = 0x25: DABT (current EL), IL = 32 bits
[  171.573108]   SET = 0, FnV = 0
[  171.576448]   EA = 0, S1PTW = 0
[  171.579745]   FSC = 0x04: level 0 translation fault
[  171.584760] Data abort info:
[  171.588012]   ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000
[  171.593734]   CM = 0, WnR = 1, TnD = 0, TagAccess = 0
[  171.598962]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  171.604471] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000083837000
[  171.611358] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
[  171.618500] Internal error: Oops: 0000000096000044 [#1]  SMP
[  171.624222] Modules linked in: powervr drm_shmem_helper drm_gpuvm...
[  171.656580] CPU: 0 UID: 0 PID: 549 Comm: bash Not tainted 7.0.0-rc2-g730b257ba723-dirty #13 PREEMPT
[  171.665773] Hardware name: BeagleBoard.org BeaglePlay (DT)
[  171.671296] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  171.678306] pc : pvr_fw_trace_mask_set+0x78/0x154 [powervr]
[  171.683959] lr : pvr_fw_trace_mask_set+0x4c/0x154 [powervr]
[  171.689593] sp : ffff8000835ebb90
[  171.692929] x29: ffff8000835ebc00 x28: ffff000005c60f80 x27: 0000000000000000
[  171.700130] x26: 0000000000000000 x25: ffff00000504af28 x24: 0000000000000000
[  171.707324] x23: ffff00000504af50 x22: 0000000000000203 x21: 0000000000000000
[  171.714518] x20: ffff000005c44a80 x19: ffff000005c457b8 x18: 0000000000000000
[  171.721715] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaae8887580
[  171.728908] x14: 0000000000000000 x13: 0000000000000000 x12: ffff8000835ebc30
[  171.736095] x11: ffff00000504af2a x10: ffff00008504af29 x9 : 0fffffffffffffff
[  171.743286] x8 : ffff8000835ebbf8 x7 : 0000000000000000 x6 : 000000000000002a
[  171.750479] x5 : ffff00000504af2e x4 : 0000000000000000 x3 : 0000000000000010
[  171.757674] x2 : 0000000000000203 x1 : 0000000000000000 x0 : ffff8000835ebba0
[  171.764871] Call trace:
[  171.767342]  pvr_fw_trace_mask_set+0x78/0x154 [powervr] (P)
[  171.772984]  simple_attr_write_xsigned.isra.0+0xe0/0x19c
[  171.778341]  simple_attr_write+0x18/0x24
[  171.782296]  debugfs_attr_write+0x50/0x98
[  171.786341]  full_proxy_write+0x6c/0xa8
[  171.790208]  vfs_write+0xd4/0x350
[  171.793561]  ksys_write+0x70/0x108
[  171.796995]  __arm64_sys_write+0x1c/0x28
[  171.800952]  invoke_syscall+0x48/0x10c
[  171.804740]  el0_svc_common.constprop.0+0x40/0xe0
[  171.809487]  do_el0_svc+0x1c/0x28
[  171.812834]  el0_svc+0x34/0x108
[  171.816013]  el0t_64_sync_handler+0xa0/0xe4
[  171.820237]  el0t_64_sync+0x198/0x19c
[  171.823939] Code: 32000262 b90ac293 1a931056 9134e293 (b9000036)
[  171.830073] ---[ end trace 0000000000000000 ]---

Fixes: a331631496 ("drm/imagination: Simplify module parameters")
Signed-off-by: Brajesh Gupta <brajesh.gupta@imgtec.com>
Reviewed-by: Alessio Belle <alessio.belle@imgtec.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260427-ftrace_fix-v3-1-e081530759a8@imgtec.com
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
2026-04-27 14:22:52 +01:00
..
Kconfig drm/imagination: KUnit test for pvr_gpuid_decode_string() 2026-01-19 11:20:22 +00:00
Makefile drm/imagination: Implement handling of context reset notification 2026-03-24 08:22:21 +00:00
pvr_ccb.c drm/imagination: Implement handling of context reset notification 2026-03-24 08:22:21 +00:00
pvr_ccb.h
pvr_cccb.c
pvr_cccb.h
pvr_context.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_context.h
pvr_debugfs.c drm/imagination: Simplify module parameters 2026-01-19 11:20:21 +00:00
pvr_debugfs.h
pvr_device_info.c
pvr_device_info.h
pvr_device.c drm/imagination: Synchronize interrupts before suspending the GPU 2026-03-17 14:27:42 +00:00
pvr_device.h drm/imagination: Use dev_pm_domain_attach_list() 2026-02-06 10:18:30 +00:00
pvr_drv.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_drv.h drm: remove driver date from struct drm_driver and all drivers 2024-12-05 12:35:42 +02:00
pvr_dump.c drm/imagination: Implement handling of context reset notification 2026-03-24 08:22:21 +00:00
pvr_dump.h drm/imagination: Implement handling of context reset notification 2026-03-24 08:22:21 +00:00
pvr_free_list.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_free_list.h
pvr_fw_info.h
pvr_fw_meta.c drm: include drm_print.h where needed 2025-10-31 10:34:52 +02:00
pvr_fw_meta.h
pvr_fw_mips.c drm/imagination: Move ELF fw utils to common file 2025-04-15 12:21:52 +01:00
pvr_fw_mips.h
pvr_fw_riscv.c drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_fw_startstop.c drm/imagination: Skip 2nd thread DM association for non META Firmware 2026-03-23 15:02:05 +00:00
pvr_fw_startstop.h
pvr_fw_trace.c drm/imagination: Fix segfault when updating ftrace mask 2026-04-27 14:22:52 +01:00
pvr_fw_trace.h drm/imagination: Simplify module parameters 2026-01-19 11:20:21 +00:00
pvr_fw_util.c drm/imagination: Move ELF fw utils to common file 2025-04-15 12:21:52 +01:00
pvr_fw.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_fw.h drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_gem.c drm/gem-shmem: Track folio accessed/dirty status in vmap 2026-03-11 09:33:43 +01:00
pvr_gem.h drm/imagination: Use cached memory with dma_coherent 2025-04-15 12:21:52 +01:00
pvr_hwrt.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_hwrt.h
pvr_job.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_job.h
pvr_mmu.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_mmu.h
pvr_power.c Linux 7.0-rc6 2026-03-31 07:51:02 +10:00
pvr_power.h drm/imagination: Discard pm_runtime_put() return value 2026-01-08 15:19:15 +01:00
pvr_queue.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_queue.h drm/sched: Store the drm client_id in drm_sched_fence 2025-05-28 16:15:58 +02:00
pvr_rogue_cr_defs_client.h
pvr_rogue_cr_defs.h drm/imagination: Update register defs for newer GPUs 2025-04-15 12:21:50 +01:00
pvr_rogue_defs.h
pvr_rogue_fwif_check.h
pvr_rogue_fwif_client_check.h
pvr_rogue_fwif_client.h
pvr_rogue_fwif_common.h
pvr_rogue_fwif_dev_info.h
pvr_rogue_fwif_resetframework.h
pvr_rogue_fwif_sf.h
pvr_rogue_fwif_shared_check.h
pvr_rogue_fwif_shared.h drm/imagination: Switch reset_reason fields from enum to u32 2026-03-24 08:19:59 +00:00
pvr_rogue_fwif_stream.h
pvr_rogue_fwif.h drm/imagination: Switch reset_reason fields from enum to u32 2026-03-24 08:19:59 +00:00
pvr_rogue_heap_config.h
pvr_rogue_meta.h
pvr_rogue_mips_check.h
pvr_rogue_mips.h
pvr_rogue_mmu_defs.h
pvr_rogue_riscv.h drm/imagination: Add RISC-V firmware processor support 2025-04-15 12:21:52 +01:00
pvr_stream_defs.c
pvr_stream_defs.h
pvr_stream.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_stream.h
pvr_sync.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_sync.h
pvr_test.c drm/imagination: KUnit test for pvr_gpuid_decode_string() 2026-01-19 11:20:22 +00:00
pvr_vm_mips.c drm/imagination: loop counters moved to loop scope 2025-04-07 10:09:40 +01:00
pvr_vm_mips.h
pvr_vm.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pvr_vm.h drm/imagination: Hold drm_gem_gpuva lock for unmap 2025-03-03 12:09:00 +00:00