* Re: [LTP] [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL [not found] <20250812143402.8619-2-christian.koenig@amd.com> @ 2025-08-20 7:27 ` kernel test robot 2025-08-21 13:00 ` Christian König via ltp 0 siblings, 1 reply; 3+ messages in thread From: kernel test robot @ 2025-08-20 7:27 UTC (permalink / raw) To: Christian König Cc: simona.vetter, lkp, tvrtko.ursulin, phasta, dri-devel, linaro-mm-sig, oliver.sang, oe-lkp, dakr, airlied, sumit.semwal, ltp, linux-media Hello, kernel test robot noticed "WARNING:at_drivers/dma-buf/dma-fence.c:#dma_fence_signal" on: commit: 409db68e04bdf052bc03f620e70339764b598ade ("[PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL") url: https://github.com/intel-lab-lkp/linux/commits/Christian-K-nig/dma-buf-add-warning-when-dma_fence-is-signaled-from-IOCTL/20250812-223543 base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 53e760d8949895390e256e723e7ee46618310361 patch link: https://lore.kernel.org/all/20250812143402.8619-2-christian.koenig@amd.com/ patch subject: [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL in testcase: ltp version: ltp-x86_64-9f512c1d8-1_20250809 with following parameters: test: syscalls-ipc-msgstress config: x86_64-rhel-9.4-ltp compiler: gcc-12 test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 16G memory (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <oliver.sang@intel.com> | Closes: https://lore.kernel.org/oe-lkp/202508200843.8b006132-lkp@intel.com [ 51.636268][ T218] ------------[ cut here ]------------ [ 51.636273][ T218] WARNING: CPU: 3 PID: 218 at drivers/dma-buf/dma-fence.c:420 dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) [ 51.636292][ T218] Modules linked in: coretemp sd_mod snd_hda_codec_realtek_lib snd_hda_codec_generic sg ipmi_devintf kvm_intel snd_hda_intel ipmi_msghandler platform_profile i915(+) kvm snd_hda_codec intel_gtt dell_wmi snd_hda_core drm_buddy binfmt_misc dell_smbios snd_intel_dspcfg ttm dell_wmi_descriptor snd_intel_sdw_acpi snd_hwdep mei_wdt sparse_keymap irqbypass drm_display_helper ahci ghash_clmulni_intel snd_pcm libahci rfkill cec mei_me rapl intel_cstate dcdbas snd_timer drm_client_lib libata intel_uncore mei snd drm_kms_helper i2c_i801 i2c_smbus pcspkr lpc_ich soundcore video wmi fuse drm loop dm_mod [ 51.636385][ T218] CPU: 3 UID: 0 PID: 218 Comm: (udev-worker) Not tainted 6.17.0-rc1-00006-g409db68e04bd #1 PREEMPT(voluntary) [ 51.636395][ T218] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A05 12/05/2013 [ 51.636399][ T218] RIP: 0010:dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) [ 51.636415][ T218] Code: 00 fc ff df 80 3c 02 00 75 36 48 8b 3b 4c 89 e6 e8 10 33 27 01 89 e8 5b 5d 41 5c c3 cc cc cc cc e8 b0 2e 77 fe 48 85 c0 75 bc <0f> 0b eb b8 0f 0b bd ea ff ff ff 5b 89 e8 5d 41 5c c3 cc cc cc cc All code ======== 0: 00 fc add %bh,%ah 2: ff (bad) 3: df 80 3c 02 00 75 filds 0x7500023c(%rax) 9: 36 48 8b 3b ss mov (%rbx),%rdi d: 4c 89 e6 mov %r12,%rsi 10: e8 10 33 27 01 call 0x1273325 15: 89 e8 mov %ebp,%eax 17: 5b pop %rbx 18: 5d pop %rbp 19: 41 5c pop %r12 1b: c3 ret 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: e8 b0 2e 77 fe call 0xfffffffffe772ed5 25: 48 85 c0 test %rax,%rax 28: 75 bc jne 0xffffffffffffffe6 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb b8 jmp 0xffffffffffffffe6 2e: 0f 0b ud2 30: bd ea ff ff ff mov $0xffffffea,%ebp 35: 5b pop %rbx 36: 89 e8 mov %ebp,%eax 38: 5d pop %rbp 39: 41 5c pop %r12 3b: c3 ret 3c: cc int3 3d: cc int3 3e: cc int3 3f: cc int3 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb b8 jmp 0xffffffffffffffbc 4: 0f 0b ud2 6: bd ea ff ff ff mov $0xffffffea,%ebp b: 5b pop %rbx c: 89 e8 mov %ebp,%eax e: 5d pop %rbp f: 41 5c pop %r12 11: c3 ret 12: cc int3 13: cc int3 14: cc int3 15: cc int3 [ 51.636420][ T218] RSP: 0018:ffffc90000a9ed30 EFLAGS: 00010046 [ 51.636428][ T218] RAX: 0000000000000000 RBX: ffff88811750fc00 RCX: 0000000000000018 [ 51.636437][ T218] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810691512c [ 51.636440][ T218] RBP: 0000000be56b1408 R08: 0000000000000001 R09: fffff52000153d9a [ 51.636445][ T218] R10: 0000000000000003 R11: ffff888108145000 R12: 0000000000000246 [ 51.636452][ T218] R13: ffffffffc1c9b060 R14: ffff88810406ba0c R15: 1ffff92000153dc2 [ 51.636455][ T218] FS: 00007efd90c038c0(0000) GS:ffff8883e4077000(0000) knlGS:0000000000000000 [ 51.636459][ T218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.636462][ T218] CR2: 00007f5bd8238c20 CR3: 000000040ed8a005 CR4: 00000000001726f0 [ 51.636466][ T218] Call Trace: [ 51.636469][ T218] <TASK> [ 51.636477][ T218] fence_work (include/linux/dma-fence.h:272 drivers/gpu/drm/i915/i915_sw_fence_work.c:23) i915 [ 51.637304][ T218] fence_notify (drivers/gpu/drm/i915/i915_sw_fence_work.c:39) i915 [ 51.637827][ T218] __i915_sw_fence_complete (drivers/gpu/drm/i915/i915_sw_fence.c:201) i915 [ 51.638300][ T218] i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1601) i915 [ 51.638763][ T218] ? __pfx_i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1434) i915 [ 51.639218][ T218] ? i915_gem_object_make_unshrinkable (include/linux/list.h:215 include/linux/list.h:287 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:500) i915 [ 51.639648][ T218] ? i915_vma_make_unshrinkable (drivers/gpu/drm/i915/i915_vma.c:2292) i915 [ 51.640091][ T218] ? intel_ring_pin (drivers/gpu/drm/i915/gt/intel_ring.c:73) i915 [ 51.640505][ T218] intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1290 drivers/gpu/drm/i915/gt/intel_ring_submission.c:1421) i915 [ 51.640918][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 [ 51.641232][ T65] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [ 51.641321][ T218] ? intel_engine_init_whitelist (drivers/gpu/drm/i915/gt/intel_workarounds.c:2104) i915 [ 51.641735][ T218] ? __intel_wakeref_init (arch/x86/include/asm/atomic.h:28 include/linux/atomic/atomic-arch-fallback.h:503 include/linux/atomic/atomic-instrumented.h:68 drivers/gpu/drm/i915/intel_wakeref.c:109) i915 [ 51.642126][ T218] intel_engines_init (drivers/gpu/drm/i915/gt/intel_engine_cs.c:1514) i915 [ 51.642521][ T218] ? i915_gem_object_make_unshrinkable (arch/x86/include/asm/atomic.h:93 include/linux/atomic/atomic-arch-fallback.h:667 include/linux/atomic/atomic-arch-fallback.h:1119 include/linux/atomic/atomic-instrumented.h:524 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:498) i915 [ 51.642929][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 [ 51.643331][ T218] intel_gt_init (drivers/gpu/drm/i915/gt/intel_gt.c:719) i915 [ 51.643728][ T218] i915_gem_init (drivers/gpu/drm/i915/i915_gem.c:1191) i915 [ 51.644140][ T218] i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:831) i915 [ 51.644524][ T218] ? __pfx_i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:780) i915 [ 51.644903][ T218] ? drm_privacy_screen_get (drivers/gpu/drm/drm_privacy_screen.c:169) drm [ 51.645047][ T218] ? intel_display_driver_probe_defer (drivers/gpu/drm/i915/display/intel_display_driver.c:84) i915 [ 51.645483][ T218] ? i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:995) i915 [ 51.645876][ T218] ? __pfx_i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:956) i915 [ 51.646267][ T218] local_pci_probe (drivers/pci/pci-driver.c:324) [ 51.646283][ T218] pci_call_probe (drivers/pci/pci-driver.c:392) [ 51.646295][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 51.646308][ T218] ? __pfx_pci_call_probe (drivers/pci/pci-driver.c:352) [ 51.646321][ T218] ? kernfs_add_one (fs/kernfs/dir.c:834) [ 51.646337][ T218] ? pci_assign_irq (drivers/pci/irq.c:149) [ 51.646350][ T218] ? pci_match_device (drivers/pci/pci-driver.c:159 (discriminator 1)) [ 51.646362][ T218] ? kernfs_put (arch/x86/include/asm/atomic.h:67 (discriminator 1) include/linux/atomic/atomic-arch-fallback.h:2278 (discriminator 1) include/linux/atomic/atomic-instrumented.h:1384 (discriminator 1) fs/kernfs/dir.c:569 (discriminator 1)) [ 51.646368][ T218] pci_device_probe (drivers/pci/pci-driver.c:452) [ 51.646377][ T218] really_probe (drivers/base/dd.c:581 drivers/base/dd.c:659) [ 51.646391][ T218] __driver_probe_device (drivers/base/dd.c:801) [ 51.646404][ T218] driver_probe_device (drivers/base/dd.c:831) [ 51.646416][ T218] __driver_attach (drivers/base/dd.c:1218) [ 51.646424][ T218] ? __pfx___driver_attach (drivers/base/dd.c:1158) [ 51.646428][ T218] bus_for_each_dev (drivers/base/bus.c:369) [ 51.646441][ T218] ? __pfx_bus_for_each_dev (drivers/base/bus.c:358) [ 51.646444][ T218] ? __kmalloc_cache_noprof (arch/x86/include/asm/jump_label.h:46 include/linux/memcontrol.h:1714 mm/slub.c:2210 mm/slub.c:4190 mm/slub.c:4229 mm/slub.c:4391) [ 51.646456][ T218] ? klist_add_tail (include/linux/list.h:150 include/linux/list.h:183 lib/klist.c:104 lib/klist.c:137) [ 51.646468][ T218] bus_add_driver (drivers/base/bus.c:678) [ 51.646482][ T218] driver_register (drivers/base/driver.c:249) [ 51.646490][ T218] i915_init (drivers/gpu/drm/i915/i915_driver.c:1428) i915 [ 51.646891][ T218] ? __pfx_i915_init (drivers/gpu/drm/i915/i915_config.c:13) i915 [ 51.647101][ T67] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 51.647277][ T218] do_one_initcall (init/main.c:1269) [ 51.647292][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) [ 51.647304][ T218] ? __pfx_do_one_initcall (init/main.c:1260) [ 51.647315][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) [ 51.647327][ T218] ? __kasan_slab_alloc (mm/kasan/common.c:329 mm/kasan/common.c:356) [ 51.647340][ T218] ? __kmalloc_cache_noprof (mm/slub.c:4180 mm/slub.c:4229 mm/slub.c:4391) [ 51.647352][ T218] ? kasan_save_track (arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) [ 51.647365][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) [ 51.647377][ T218] do_init_module (kernel/module/main.c:3039) [ 51.647388][ T218] ? __pfx_do_init_module (kernel/module/main.c:3011) [ 51.647402][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) [ 51.647414][ T218] ? klp_module_coming (kernel/livepatch/core.c:1317) [ 51.647426][ T218] ? load_module (kernel/module/main.c:2468 kernel/module/main.c:2463 kernel/module/main.c:3504) [ 51.647441][ T218] load_module (kernel/module/main.c:3509) [ 51.647449][ T218] ? ima_post_read_file (security/integrity/ima/ima_main.c:896 security/integrity/ima/ima_main.c:878) [ 51.647466][ T218] ? __pfx_load_module (kernel/module/main.c:3353) [ 51.647478][ T218] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) [ 51.647489][ T218] ? init_module_from_file (kernel/module/main.c:3701) [ 51.647499][ T218] init_module_from_file (kernel/module/main.c:3701) [ 51.647514][ T218] ? __pfx_init_module_from_file (kernel/module/main.c:3677) [ 51.647525][ T218] ? mm_get_unmapped_area (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 mm/mmap.c:805 mm/mmap.c:871) [ 51.647540][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) [ 51.647547][ T218] ? __pfx__raw_spin_lock (kernel/locking/spinlock.c:153) [ 51.647560][ T218] idempotent_init_module (kernel/module/main.c:3713) [ 51.647573][ T218] ? __pfx_idempotent_init_module (kernel/module/main.c:3705) [ 51.647582][ T218] ? __pfx___seccomp_filter (kernel/seccomp.c:1244) [ 51.647590][ T218] ? fdget (include/linux/atomic/atomic-arch-fallback.h:479 include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1167 fs/file.c:1181) [ 51.647607][ T218] ? security_capable (security/security.c:1142) [ 51.647615][ T218] __x64_sys_finit_module (include/linux/file.h:62 include/linux/file.h:83 kernel/module/main.c:3736 kernel/module/main.c:3723 kernel/module/main.c:3723) [ 51.647627][ T218] ? syscall_trace_enter (kernel/entry/syscall-common.c:44) [ 51.647640][ T218] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) [ 51.647657][ T218] ? fput (arch/x86/include/asm/atomic64_64.h:79 include/linux/atomic/atomic-arch-fallback.h:2913 include/linux/atomic/atomic-arch-fallback.h:3364 include/linux/atomic/atomic-long.h:698 include/linux/atomic/atomic-instrumented.h:3767 include/linux/file_ref.h:157 fs/file_table.c:544) [ 51.647668][ T218] ? ksys_mmap_pgoff (mm/mmap.c:609) [ 51.647682][ T218] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) [ 51.647694][ T218] ? from_kgid_munged (kernel/user_namespace.c:535) [ 51.647708][ T218] ? _copy_to_user (arch/x86/include/asm/uaccess_64.h:126 arch/x86/include/asm/uaccess_64.h:147 include/linux/uaccess.h:197 lib/usercopy.c:26) [ 51.647722][ T218] ? cp_new_stat (fs/stat.c:471) [ 51.647732][ T218] ? __pfx_cp_new_stat (fs/stat.c:471) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250820/202508200843.8b006132-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki -- Mailing list info: https://lists.linux.it/listinfo/ltp ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [LTP] [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL 2025-08-20 7:27 ` [LTP] [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL kernel test robot @ 2025-08-21 13:00 ` Christian König via ltp 2025-09-01 11:14 ` Tvrtko Ursulin 0 siblings, 1 reply; 3+ messages in thread From: Christian König via ltp @ 2025-08-21 13:00 UTC (permalink / raw) To: simona.vetter Cc: lkp, tvrtko.ursulin, phasta, dri-devel, linaro-mm-sig, oe-lkp, dakr, airlied, sumit.semwal, ltp, linux-media Hi Sima, I need your opinion on this here. Adding the warning to not signal a fence from IOCTL context yielded it's first victim. Skimming through the code what i915 does here is to signal a dma_fence from an error handling path. E.g. the dma_fence was allocated, initialized, the vma code finds that something is wrong and signals the fence and frees it's reference. The function which does that has the following comment: /** * dma_fence_work_commit_imm: Commit the fence, and if possible execute locally. * @f: the fenced worker * * Instead of always scheduling a worker to execute the callback (see * dma_fence_work_commit()), we try to execute the callback immediately in * the local context. It is required that the fence be committed before it * is published, and that no other threads try to tamper with the number * of asynchronous waits on the fence (or else the callback will be * executed in the wrong context, i.e. not the callers). */ This works technically, but I would say that this is absolutely not the best practice. We have some oportunity to unify dma_fence_work logic between i915 and amdgpu here, but I'm pretty sure I don't want to allow such stuff in amdgpu even if it saves a few of CPU cycles in an error cleanup path. What's your opinion on that? Thanks, Christian. On 20.08.25 09:27, kernel test robot wrote: > > > Hello, > > kernel test robot noticed "WARNING:at_drivers/dma-buf/dma-fence.c:#dma_fence_signal" on: > > commit: 409db68e04bdf052bc03f620e70339764b598ade ("[PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL") > url: https://github.com/intel-lab-lkp/linux/commits/Christian-K-nig/dma-buf-add-warning-when-dma_fence-is-signaled-from-IOCTL/20250812-223543 > base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 53e760d8949895390e256e723e7ee46618310361 > patch link: https://lore.kernel.org/all/20250812143402.8619-2-christian.koenig@amd.com/ > patch subject: [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL > > in testcase: ltp > version: ltp-x86_64-9f512c1d8-1_20250809 > with following parameters: > > test: syscalls-ipc-msgstress > > > > config: x86_64-rhel-9.4-ltp > compiler: gcc-12 > test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 16G memory > > (please refer to attached dmesg/kmsg for entire log/backtrace) > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <oliver.sang@intel.com> > | Closes: https://lore.kernel.org/oe-lkp/202508200843.8b006132-lkp@intel.com > > > [ 51.636268][ T218] ------------[ cut here ]------------ > [ 51.636273][ T218] WARNING: CPU: 3 PID: 218 at drivers/dma-buf/dma-fence.c:420 dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) > [ 51.636292][ T218] Modules linked in: coretemp sd_mod snd_hda_codec_realtek_lib snd_hda_codec_generic sg ipmi_devintf kvm_intel snd_hda_intel ipmi_msghandler platform_profile i915(+) kvm snd_hda_codec intel_gtt dell_wmi snd_hda_core drm_buddy binfmt_misc dell_smbios snd_intel_dspcfg ttm dell_wmi_descriptor snd_intel_sdw_acpi snd_hwdep mei_wdt sparse_keymap irqbypass drm_display_helper ahci ghash_clmulni_intel snd_pcm libahci rfkill cec mei_me rapl intel_cstate dcdbas snd_timer drm_client_lib libata intel_uncore mei snd drm_kms_helper i2c_i801 i2c_smbus pcspkr lpc_ich soundcore video wmi fuse drm loop dm_mod > [ 51.636385][ T218] CPU: 3 UID: 0 PID: 218 Comm: (udev-worker) Not tainted 6.17.0-rc1-00006-g409db68e04bd #1 PREEMPT(voluntary) > [ 51.636395][ T218] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A05 12/05/2013 > [ 51.636399][ T218] RIP: 0010:dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) > [ 51.636415][ T218] Code: 00 fc ff df 80 3c 02 00 75 36 48 8b 3b 4c 89 e6 e8 10 33 27 01 89 e8 5b 5d 41 5c c3 cc cc cc cc e8 b0 2e 77 fe 48 85 c0 75 bc <0f> 0b eb b8 0f 0b bd ea ff ff ff 5b 89 e8 5d 41 5c c3 cc cc cc cc > All code > ======== > 0: 00 fc add %bh,%ah > 2: ff (bad) > 3: df 80 3c 02 00 75 filds 0x7500023c(%rax) > 9: 36 48 8b 3b ss mov (%rbx),%rdi > d: 4c 89 e6 mov %r12,%rsi > 10: e8 10 33 27 01 call 0x1273325 > 15: 89 e8 mov %ebp,%eax > 17: 5b pop %rbx > 18: 5d pop %rbp > 19: 41 5c pop %r12 > 1b: c3 ret > 1c: cc int3 > 1d: cc int3 > 1e: cc int3 > 1f: cc int3 > 20: e8 b0 2e 77 fe call 0xfffffffffe772ed5 > 25: 48 85 c0 test %rax,%rax > 28: 75 bc jne 0xffffffffffffffe6 > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: eb b8 jmp 0xffffffffffffffe6 > 2e: 0f 0b ud2 > 30: bd ea ff ff ff mov $0xffffffea,%ebp > 35: 5b pop %rbx > 36: 89 e8 mov %ebp,%eax > 38: 5d pop %rbp > 39: 41 5c pop %r12 > 3b: c3 ret > 3c: cc int3 > 3d: cc int3 > 3e: cc int3 > 3f: cc int3 > > Code starting with the faulting instruction > =========================================== > 0: 0f 0b ud2 > 2: eb b8 jmp 0xffffffffffffffbc > 4: 0f 0b ud2 > 6: bd ea ff ff ff mov $0xffffffea,%ebp > b: 5b pop %rbx > c: 89 e8 mov %ebp,%eax > e: 5d pop %rbp > f: 41 5c pop %r12 > 11: c3 ret > 12: cc int3 > 13: cc int3 > 14: cc int3 > 15: cc int3 > [ 51.636420][ T218] RSP: 0018:ffffc90000a9ed30 EFLAGS: 00010046 > [ 51.636428][ T218] RAX: 0000000000000000 RBX: ffff88811750fc00 RCX: 0000000000000018 > [ 51.636437][ T218] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810691512c > [ 51.636440][ T218] RBP: 0000000be56b1408 R08: 0000000000000001 R09: fffff52000153d9a > [ 51.636445][ T218] R10: 0000000000000003 R11: ffff888108145000 R12: 0000000000000246 > [ 51.636452][ T218] R13: ffffffffc1c9b060 R14: ffff88810406ba0c R15: 1ffff92000153dc2 > [ 51.636455][ T218] FS: 00007efd90c038c0(0000) GS:ffff8883e4077000(0000) knlGS:0000000000000000 > [ 51.636459][ T218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 51.636462][ T218] CR2: 00007f5bd8238c20 CR3: 000000040ed8a005 CR4: 00000000001726f0 > [ 51.636466][ T218] Call Trace: > [ 51.636469][ T218] <TASK> > [ 51.636477][ T218] fence_work (include/linux/dma-fence.h:272 drivers/gpu/drm/i915/i915_sw_fence_work.c:23) i915 > [ 51.637304][ T218] fence_notify (drivers/gpu/drm/i915/i915_sw_fence_work.c:39) i915 > [ 51.637827][ T218] __i915_sw_fence_complete (drivers/gpu/drm/i915/i915_sw_fence.c:201) i915 > [ 51.638300][ T218] i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1601) i915 > [ 51.638763][ T218] ? __pfx_i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1434) i915 > [ 51.639218][ T218] ? i915_gem_object_make_unshrinkable (include/linux/list.h:215 include/linux/list.h:287 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:500) i915 > [ 51.639648][ T218] ? i915_vma_make_unshrinkable (drivers/gpu/drm/i915/i915_vma.c:2292) i915 > [ 51.640091][ T218] ? intel_ring_pin (drivers/gpu/drm/i915/gt/intel_ring.c:73) i915 > [ 51.640505][ T218] intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1290 drivers/gpu/drm/i915/gt/intel_ring_submission.c:1421) i915 > [ 51.640918][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 > [ 51.641232][ T65] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 > [ 51.641321][ T218] ? intel_engine_init_whitelist (drivers/gpu/drm/i915/gt/intel_workarounds.c:2104) i915 > [ 51.641735][ T218] ? __intel_wakeref_init (arch/x86/include/asm/atomic.h:28 include/linux/atomic/atomic-arch-fallback.h:503 include/linux/atomic/atomic-instrumented.h:68 drivers/gpu/drm/i915/intel_wakeref.c:109) i915 > [ 51.642126][ T218] intel_engines_init (drivers/gpu/drm/i915/gt/intel_engine_cs.c:1514) i915 > [ 51.642521][ T218] ? i915_gem_object_make_unshrinkable (arch/x86/include/asm/atomic.h:93 include/linux/atomic/atomic-arch-fallback.h:667 include/linux/atomic/atomic-arch-fallback.h:1119 include/linux/atomic/atomic-instrumented.h:524 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:498) i915 > [ 51.642929][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 > [ 51.643331][ T218] intel_gt_init (drivers/gpu/drm/i915/gt/intel_gt.c:719) i915 > [ 51.643728][ T218] i915_gem_init (drivers/gpu/drm/i915/i915_gem.c:1191) i915 > [ 51.644140][ T218] i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:831) i915 > [ 51.644524][ T218] ? __pfx_i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:780) i915 > [ 51.644903][ T218] ? drm_privacy_screen_get (drivers/gpu/drm/drm_privacy_screen.c:169) drm > [ 51.645047][ T218] ? intel_display_driver_probe_defer (drivers/gpu/drm/i915/display/intel_display_driver.c:84) i915 > [ 51.645483][ T218] ? i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:995) i915 > [ 51.645876][ T218] ? __pfx_i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:956) i915 > [ 51.646267][ T218] local_pci_probe (drivers/pci/pci-driver.c:324) > [ 51.646283][ T218] pci_call_probe (drivers/pci/pci-driver.c:392) > [ 51.646295][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) > [ 51.646308][ T218] ? __pfx_pci_call_probe (drivers/pci/pci-driver.c:352) > [ 51.646321][ T218] ? kernfs_add_one (fs/kernfs/dir.c:834) > [ 51.646337][ T218] ? pci_assign_irq (drivers/pci/irq.c:149) > [ 51.646350][ T218] ? pci_match_device (drivers/pci/pci-driver.c:159 (discriminator 1)) > [ 51.646362][ T218] ? kernfs_put (arch/x86/include/asm/atomic.h:67 (discriminator 1) include/linux/atomic/atomic-arch-fallback.h:2278 (discriminator 1) include/linux/atomic/atomic-instrumented.h:1384 (discriminator 1) fs/kernfs/dir.c:569 (discriminator 1)) > [ 51.646368][ T218] pci_device_probe (drivers/pci/pci-driver.c:452) > [ 51.646377][ T218] really_probe (drivers/base/dd.c:581 drivers/base/dd.c:659) > [ 51.646391][ T218] __driver_probe_device (drivers/base/dd.c:801) > [ 51.646404][ T218] driver_probe_device (drivers/base/dd.c:831) > [ 51.646416][ T218] __driver_attach (drivers/base/dd.c:1218) > [ 51.646424][ T218] ? __pfx___driver_attach (drivers/base/dd.c:1158) > [ 51.646428][ T218] bus_for_each_dev (drivers/base/bus.c:369) > [ 51.646441][ T218] ? __pfx_bus_for_each_dev (drivers/base/bus.c:358) > [ 51.646444][ T218] ? __kmalloc_cache_noprof (arch/x86/include/asm/jump_label.h:46 include/linux/memcontrol.h:1714 mm/slub.c:2210 mm/slub.c:4190 mm/slub.c:4229 mm/slub.c:4391) > [ 51.646456][ T218] ? klist_add_tail (include/linux/list.h:150 include/linux/list.h:183 lib/klist.c:104 lib/klist.c:137) > [ 51.646468][ T218] bus_add_driver (drivers/base/bus.c:678) > [ 51.646482][ T218] driver_register (drivers/base/driver.c:249) > [ 51.646490][ T218] i915_init (drivers/gpu/drm/i915/i915_driver.c:1428) i915 > [ 51.646891][ T218] ? __pfx_i915_init (drivers/gpu/drm/i915/i915_config.c:13) i915 > [ 51.647101][ T67] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA > [ 51.647277][ T218] do_one_initcall (init/main.c:1269) > [ 51.647292][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) > [ 51.647304][ T218] ? __pfx_do_one_initcall (init/main.c:1260) > [ 51.647315][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) > [ 51.647327][ T218] ? __kasan_slab_alloc (mm/kasan/common.c:329 mm/kasan/common.c:356) > [ 51.647340][ T218] ? __kmalloc_cache_noprof (mm/slub.c:4180 mm/slub.c:4229 mm/slub.c:4391) > [ 51.647352][ T218] ? kasan_save_track (arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) > [ 51.647365][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) > [ 51.647377][ T218] do_init_module (kernel/module/main.c:3039) > [ 51.647388][ T218] ? __pfx_do_init_module (kernel/module/main.c:3011) > [ 51.647402][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) > [ 51.647414][ T218] ? klp_module_coming (kernel/livepatch/core.c:1317) > [ 51.647426][ T218] ? load_module (kernel/module/main.c:2468 kernel/module/main.c:2463 kernel/module/main.c:3504) > [ 51.647441][ T218] load_module (kernel/module/main.c:3509) > [ 51.647449][ T218] ? ima_post_read_file (security/integrity/ima/ima_main.c:896 security/integrity/ima/ima_main.c:878) > [ 51.647466][ T218] ? __pfx_load_module (kernel/module/main.c:3353) > [ 51.647478][ T218] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) > [ 51.647489][ T218] ? init_module_from_file (kernel/module/main.c:3701) > [ 51.647499][ T218] init_module_from_file (kernel/module/main.c:3701) > [ 51.647514][ T218] ? __pfx_init_module_from_file (kernel/module/main.c:3677) > [ 51.647525][ T218] ? mm_get_unmapped_area (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 mm/mmap.c:805 mm/mmap.c:871) > [ 51.647540][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) > [ 51.647547][ T218] ? __pfx__raw_spin_lock (kernel/locking/spinlock.c:153) > [ 51.647560][ T218] idempotent_init_module (kernel/module/main.c:3713) > [ 51.647573][ T218] ? __pfx_idempotent_init_module (kernel/module/main.c:3705) > [ 51.647582][ T218] ? __pfx___seccomp_filter (kernel/seccomp.c:1244) > [ 51.647590][ T218] ? fdget (include/linux/atomic/atomic-arch-fallback.h:479 include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1167 fs/file.c:1181) > [ 51.647607][ T218] ? security_capable (security/security.c:1142) > [ 51.647615][ T218] __x64_sys_finit_module (include/linux/file.h:62 include/linux/file.h:83 kernel/module/main.c:3736 kernel/module/main.c:3723 kernel/module/main.c:3723) > [ 51.647627][ T218] ? syscall_trace_enter (kernel/entry/syscall-common.c:44) > [ 51.647640][ T218] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) > [ 51.647657][ T218] ? fput (arch/x86/include/asm/atomic64_64.h:79 include/linux/atomic/atomic-arch-fallback.h:2913 include/linux/atomic/atomic-arch-fallback.h:3364 include/linux/atomic/atomic-long.h:698 include/linux/atomic/atomic-instrumented.h:3767 include/linux/file_ref.h:157 fs/file_table.c:544) > [ 51.647668][ T218] ? ksys_mmap_pgoff (mm/mmap.c:609) > [ 51.647682][ T218] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) > [ 51.647694][ T218] ? from_kgid_munged (kernel/user_namespace.c:535) > [ 51.647708][ T218] ? _copy_to_user (arch/x86/include/asm/uaccess_64.h:126 arch/x86/include/asm/uaccess_64.h:147 include/linux/uaccess.h:197 lib/usercopy.c:26) > [ 51.647722][ T218] ? cp_new_stat (fs/stat.c:471) > [ 51.647732][ T218] ? __pfx_cp_new_stat (fs/stat.c:471) > > > The kernel config and materials to reproduce are available at: > https://download.01.org/0day-ci/archive/20250820/202508200843.8b006132-lkp@intel.com > > > -- Mailing list info: https://lists.linux.it/listinfo/ltp ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [LTP] [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL 2025-08-21 13:00 ` Christian König via ltp @ 2025-09-01 11:14 ` Tvrtko Ursulin 0 siblings, 0 replies; 3+ messages in thread From: Tvrtko Ursulin @ 2025-09-01 11:14 UTC (permalink / raw) To: Christian König, simona.vetter Cc: lkp, tvrtko.ursulin, phasta, dri-devel, linaro-mm-sig, oe-lkp, dakr, airlied, sumit.semwal, ltp, linux-media On 21/08/2025 14:00, Christian König wrote: > Hi Sima, > > I need your opinion on this here. Adding the warning to not signal a fence from IOCTL context yielded it's first victim. > > Skimming through the code what i915 does here is to signal a dma_fence from an error handling path. E.g. the dma_fence was allocated, initialized, the vma code finds that something is wrong and signals the fence and frees it's reference. > > The function which does that has the following comment: > > /** > * dma_fence_work_commit_imm: Commit the fence, and if possible execute locally. > * @f: the fenced worker > * > * Instead of always scheduling a worker to execute the callback (see > * dma_fence_work_commit()), we try to execute the callback immediately in > * the local context. It is required that the fence be committed before it > * is published, and that no other threads try to tamper with the number > * of asynchronous waits on the fence (or else the callback will be > * executed in the wrong context, i.e. not the callers). > */ > > This works technically, but I would say that this is absolutely not the best practice. > > We have some oportunity to unify dma_fence_work logic between i915 and amdgpu here, but I'm pretty sure I don't want to allow such stuff in amdgpu even if it saves a few of CPU cycles in an error cleanup path. Jumping in a bit. I had a quick look to remind myself of this area. Unfortunately it is not an error cleanup path but the goto labels are a bit misleadingly named. The immediate path triggers quite a lot in practice so to remove this would need some testing to ensure no regressions. Regards, Tvrtko > > What's your opinion on that? > > Thanks, > Christian. > > On 20.08.25 09:27, kernel test robot wrote: >> >> >> Hello, >> >> kernel test robot noticed "WARNING:at_drivers/dma-buf/dma-fence.c:#dma_fence_signal" on: >> >> commit: 409db68e04bdf052bc03f620e70339764b598ade ("[PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL") >> url: https://github.com/intel-lab-lkp/linux/commits/Christian-K-nig/dma-buf-add-warning-when-dma_fence-is-signaled-from-IOCTL/20250812-223543 >> base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 53e760d8949895390e256e723e7ee46618310361 >> patch link: https://lore.kernel.org/all/20250812143402.8619-2-christian.koenig@amd.com/ >> patch subject: [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL >> >> in testcase: ltp >> version: ltp-x86_64-9f512c1d8-1_20250809 >> with following parameters: >> >> test: syscalls-ipc-msgstress >> >> >> >> config: x86_64-rhel-9.4-ltp >> compiler: gcc-12 >> test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (Haswell) with 16G memory >> >> (please refer to attached dmesg/kmsg for entire log/backtrace) >> >> >> If you fix the issue in a separate patch/commit (i.e. not just a new version of >> the same patch/commit), kindly add following tags >> | Reported-by: kernel test robot <oliver.sang@intel.com> >> | Closes: https://lore.kernel.org/oe-lkp/202508200843.8b006132-lkp@intel.com >> >> >> [ 51.636268][ T218] ------------[ cut here ]------------ >> [ 51.636273][ T218] WARNING: CPU: 3 PID: 218 at drivers/dma-buf/dma-fence.c:420 dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) >> [ 51.636292][ T218] Modules linked in: coretemp sd_mod snd_hda_codec_realtek_lib snd_hda_codec_generic sg ipmi_devintf kvm_intel snd_hda_intel ipmi_msghandler platform_profile i915(+) kvm snd_hda_codec intel_gtt dell_wmi snd_hda_core drm_buddy binfmt_misc dell_smbios snd_intel_dspcfg ttm dell_wmi_descriptor snd_intel_sdw_acpi snd_hwdep mei_wdt sparse_keymap irqbypass drm_display_helper ahci ghash_clmulni_intel snd_pcm libahci rfkill cec mei_me rapl intel_cstate dcdbas snd_timer drm_client_lib libata intel_uncore mei snd drm_kms_helper i2c_i801 i2c_smbus pcspkr lpc_ich soundcore video wmi fuse drm loop dm_mod >> [ 51.636385][ T218] CPU: 3 UID: 0 PID: 218 Comm: (udev-worker) Not tainted 6.17.0-rc1-00006-g409db68e04bd #1 PREEMPT(voluntary) >> [ 51.636395][ T218] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A05 12/05/2013 >> [ 51.636399][ T218] RIP: 0010:dma_fence_signal (drivers/dma-buf/dma-fence.c:420 drivers/dma-buf/dma-fence.c:502) >> [ 51.636415][ T218] Code: 00 fc ff df 80 3c 02 00 75 36 48 8b 3b 4c 89 e6 e8 10 33 27 01 89 e8 5b 5d 41 5c c3 cc cc cc cc e8 b0 2e 77 fe 48 85 c0 75 bc <0f> 0b eb b8 0f 0b bd ea ff ff ff 5b 89 e8 5d 41 5c c3 cc cc cc cc >> All code >> ======== >> 0: 00 fc add %bh,%ah >> 2: ff (bad) >> 3: df 80 3c 02 00 75 filds 0x7500023c(%rax) >> 9: 36 48 8b 3b ss mov (%rbx),%rdi >> d: 4c 89 e6 mov %r12,%rsi >> 10: e8 10 33 27 01 call 0x1273325 >> 15: 89 e8 mov %ebp,%eax >> 17: 5b pop %rbx >> 18: 5d pop %rbp >> 19: 41 5c pop %r12 >> 1b: c3 ret >> 1c: cc int3 >> 1d: cc int3 >> 1e: cc int3 >> 1f: cc int3 >> 20: e8 b0 2e 77 fe call 0xfffffffffe772ed5 >> 25: 48 85 c0 test %rax,%rax >> 28: 75 bc jne 0xffffffffffffffe6 >> 2a:* 0f 0b ud2 <-- trapping instruction >> 2c: eb b8 jmp 0xffffffffffffffe6 >> 2e: 0f 0b ud2 >> 30: bd ea ff ff ff mov $0xffffffea,%ebp >> 35: 5b pop %rbx >> 36: 89 e8 mov %ebp,%eax >> 38: 5d pop %rbp >> 39: 41 5c pop %r12 >> 3b: c3 ret >> 3c: cc int3 >> 3d: cc int3 >> 3e: cc int3 >> 3f: cc int3 >> >> Code starting with the faulting instruction >> =========================================== >> 0: 0f 0b ud2 >> 2: eb b8 jmp 0xffffffffffffffbc >> 4: 0f 0b ud2 >> 6: bd ea ff ff ff mov $0xffffffea,%ebp >> b: 5b pop %rbx >> c: 89 e8 mov %ebp,%eax >> e: 5d pop %rbp >> f: 41 5c pop %r12 >> 11: c3 ret >> 12: cc int3 >> 13: cc int3 >> 14: cc int3 >> 15: cc int3 >> [ 51.636420][ T218] RSP: 0018:ffffc90000a9ed30 EFLAGS: 00010046 >> [ 51.636428][ T218] RAX: 0000000000000000 RBX: ffff88811750fc00 RCX: 0000000000000018 >> [ 51.636437][ T218] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810691512c >> [ 51.636440][ T218] RBP: 0000000be56b1408 R08: 0000000000000001 R09: fffff52000153d9a >> [ 51.636445][ T218] R10: 0000000000000003 R11: ffff888108145000 R12: 0000000000000246 >> [ 51.636452][ T218] R13: ffffffffc1c9b060 R14: ffff88810406ba0c R15: 1ffff92000153dc2 >> [ 51.636455][ T218] FS: 00007efd90c038c0(0000) GS:ffff8883e4077000(0000) knlGS:0000000000000000 >> [ 51.636459][ T218] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 51.636462][ T218] CR2: 00007f5bd8238c20 CR3: 000000040ed8a005 CR4: 00000000001726f0 >> [ 51.636466][ T218] Call Trace: >> [ 51.636469][ T218] <TASK> >> [ 51.636477][ T218] fence_work (include/linux/dma-fence.h:272 drivers/gpu/drm/i915/i915_sw_fence_work.c:23) i915 >> [ 51.637304][ T218] fence_notify (drivers/gpu/drm/i915/i915_sw_fence_work.c:39) i915 >> [ 51.637827][ T218] __i915_sw_fence_complete (drivers/gpu/drm/i915/i915_sw_fence.c:201) i915 >> [ 51.638300][ T218] i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1601) i915 >> [ 51.638763][ T218] ? __pfx_i915_vma_pin_ww (drivers/gpu/drm/i915/i915_vma.c:1434) i915 >> [ 51.639218][ T218] ? i915_gem_object_make_unshrinkable (include/linux/list.h:215 include/linux/list.h:287 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:500) i915 >> [ 51.639648][ T218] ? i915_vma_make_unshrinkable (drivers/gpu/drm/i915/i915_vma.c:2292) i915 >> [ 51.640091][ T218] ? intel_ring_pin (drivers/gpu/drm/i915/gt/intel_ring.c:73) i915 >> [ 51.640505][ T218] intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1290 drivers/gpu/drm/i915/gt/intel_ring_submission.c:1421) i915 >> [ 51.640918][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 >> [ 51.641232][ T65] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 >> [ 51.641321][ T218] ? intel_engine_init_whitelist (drivers/gpu/drm/i915/gt/intel_workarounds.c:2104) i915 >> [ 51.641735][ T218] ? __intel_wakeref_init (arch/x86/include/asm/atomic.h:28 include/linux/atomic/atomic-arch-fallback.h:503 include/linux/atomic/atomic-instrumented.h:68 drivers/gpu/drm/i915/intel_wakeref.c:109) i915 >> [ 51.642126][ T218] intel_engines_init (drivers/gpu/drm/i915/gt/intel_engine_cs.c:1514) i915 >> [ 51.642521][ T218] ? i915_gem_object_make_unshrinkable (arch/x86/include/asm/atomic.h:93 include/linux/atomic/atomic-arch-fallback.h:667 include/linux/atomic/atomic-arch-fallback.h:1119 include/linux/atomic/atomic-instrumented.h:524 drivers/gpu/drm/i915/gem/i915_gem_shrinker.c:498) i915 >> [ 51.642929][ T218] ? __pfx_intel_ring_submission_setup (drivers/gpu/drm/i915/gt/intel_ring_submission.c:1349) i915 >> [ 51.643331][ T218] intel_gt_init (drivers/gpu/drm/i915/gt/intel_gt.c:719) i915 >> [ 51.643728][ T218] i915_gem_init (drivers/gpu/drm/i915/i915_gem.c:1191) i915 >> [ 51.644140][ T218] i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:831) i915 >> [ 51.644524][ T218] ? __pfx_i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:780) i915 >> [ 51.644903][ T218] ? drm_privacy_screen_get (drivers/gpu/drm/drm_privacy_screen.c:169) drm >> [ 51.645047][ T218] ? intel_display_driver_probe_defer (drivers/gpu/drm/i915/display/intel_display_driver.c:84) i915 >> [ 51.645483][ T218] ? i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:995) i915 >> [ 51.645876][ T218] ? __pfx_i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:956) i915 >> [ 51.646267][ T218] local_pci_probe (drivers/pci/pci-driver.c:324) >> [ 51.646283][ T218] pci_call_probe (drivers/pci/pci-driver.c:392) >> [ 51.646295][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) >> [ 51.646308][ T218] ? __pfx_pci_call_probe (drivers/pci/pci-driver.c:352) >> [ 51.646321][ T218] ? kernfs_add_one (fs/kernfs/dir.c:834) >> [ 51.646337][ T218] ? pci_assign_irq (drivers/pci/irq.c:149) >> [ 51.646350][ T218] ? pci_match_device (drivers/pci/pci-driver.c:159 (discriminator 1)) >> [ 51.646362][ T218] ? kernfs_put (arch/x86/include/asm/atomic.h:67 (discriminator 1) include/linux/atomic/atomic-arch-fallback.h:2278 (discriminator 1) include/linux/atomic/atomic-instrumented.h:1384 (discriminator 1) fs/kernfs/dir.c:569 (discriminator 1)) >> [ 51.646368][ T218] pci_device_probe (drivers/pci/pci-driver.c:452) >> [ 51.646377][ T218] really_probe (drivers/base/dd.c:581 drivers/base/dd.c:659) >> [ 51.646391][ T218] __driver_probe_device (drivers/base/dd.c:801) >> [ 51.646404][ T218] driver_probe_device (drivers/base/dd.c:831) >> [ 51.646416][ T218] __driver_attach (drivers/base/dd.c:1218) >> [ 51.646424][ T218] ? __pfx___driver_attach (drivers/base/dd.c:1158) >> [ 51.646428][ T218] bus_for_each_dev (drivers/base/bus.c:369) >> [ 51.646441][ T218] ? __pfx_bus_for_each_dev (drivers/base/bus.c:358) >> [ 51.646444][ T218] ? __kmalloc_cache_noprof (arch/x86/include/asm/jump_label.h:46 include/linux/memcontrol.h:1714 mm/slub.c:2210 mm/slub.c:4190 mm/slub.c:4229 mm/slub.c:4391) >> [ 51.646456][ T218] ? klist_add_tail (include/linux/list.h:150 include/linux/list.h:183 lib/klist.c:104 lib/klist.c:137) >> [ 51.646468][ T218] bus_add_driver (drivers/base/bus.c:678) >> [ 51.646482][ T218] driver_register (drivers/base/driver.c:249) >> [ 51.646490][ T218] i915_init (drivers/gpu/drm/i915/i915_driver.c:1428) i915 >> [ 51.646891][ T218] ? __pfx_i915_init (drivers/gpu/drm/i915/i915_config.c:13) i915 >> [ 51.647101][ T67] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA >> [ 51.647277][ T218] do_one_initcall (init/main.c:1269) >> [ 51.647292][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) >> [ 51.647304][ T218] ? __pfx_do_one_initcall (init/main.c:1260) >> [ 51.647315][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) >> [ 51.647327][ T218] ? __kasan_slab_alloc (mm/kasan/common.c:329 mm/kasan/common.c:356) >> [ 51.647340][ T218] ? __kmalloc_cache_noprof (mm/slub.c:4180 mm/slub.c:4229 mm/slub.c:4391) >> [ 51.647352][ T218] ? kasan_save_track (arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) >> [ 51.647365][ T218] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) >> [ 51.647377][ T218] do_init_module (kernel/module/main.c:3039) >> [ 51.647388][ T218] ? __pfx_do_init_module (kernel/module/main.c:3011) >> [ 51.647402][ T218] ? kfree (mm/slub.c:4680 mm/slub.c:4879) >> [ 51.647414][ T218] ? klp_module_coming (kernel/livepatch/core.c:1317) >> [ 51.647426][ T218] ? load_module (kernel/module/main.c:2468 kernel/module/main.c:2463 kernel/module/main.c:3504) >> [ 51.647441][ T218] load_module (kernel/module/main.c:3509) >> [ 51.647449][ T218] ? ima_post_read_file (security/integrity/ima/ima_main.c:896 security/integrity/ima/ima_main.c:878) >> [ 51.647466][ T218] ? __pfx_load_module (kernel/module/main.c:3353) >> [ 51.647478][ T218] ? __pfx_kernel_read_file (fs/kernel_read_file.c:38) >> [ 51.647489][ T218] ? init_module_from_file (kernel/module/main.c:3701) >> [ 51.647499][ T218] init_module_from_file (kernel/module/main.c:3701) >> [ 51.647514][ T218] ? __pfx_init_module_from_file (kernel/module/main.c:3677) >> [ 51.647525][ T218] ? mm_get_unmapped_area (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 mm/mmap.c:805 mm/mmap.c:871) >> [ 51.647540][ T218] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) >> [ 51.647547][ T218] ? __pfx__raw_spin_lock (kernel/locking/spinlock.c:153) >> [ 51.647560][ T218] idempotent_init_module (kernel/module/main.c:3713) >> [ 51.647573][ T218] ? __pfx_idempotent_init_module (kernel/module/main.c:3705) >> [ 51.647582][ T218] ? __pfx___seccomp_filter (kernel/seccomp.c:1244) >> [ 51.647590][ T218] ? fdget (include/linux/atomic/atomic-arch-fallback.h:479 include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1167 fs/file.c:1181) >> [ 51.647607][ T218] ? security_capable (security/security.c:1142) >> [ 51.647615][ T218] __x64_sys_finit_module (include/linux/file.h:62 include/linux/file.h:83 kernel/module/main.c:3736 kernel/module/main.c:3723 kernel/module/main.c:3723) >> [ 51.647627][ T218] ? syscall_trace_enter (kernel/entry/syscall-common.c:44) >> [ 51.647640][ T218] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) >> [ 51.647657][ T218] ? fput (arch/x86/include/asm/atomic64_64.h:79 include/linux/atomic/atomic-arch-fallback.h:2913 include/linux/atomic/atomic-arch-fallback.h:3364 include/linux/atomic/atomic-long.h:698 include/linux/atomic/atomic-instrumented.h:3767 include/linux/file_ref.h:157 fs/file_table.c:544) >> [ 51.647668][ T218] ? ksys_mmap_pgoff (mm/mmap.c:609) >> [ 51.647682][ T218] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) >> [ 51.647694][ T218] ? from_kgid_munged (kernel/user_namespace.c:535) >> [ 51.647708][ T218] ? _copy_to_user (arch/x86/include/asm/uaccess_64.h:126 arch/x86/include/asm/uaccess_64.h:147 include/linux/uaccess.h:197 lib/usercopy.c:26) >> [ 51.647722][ T218] ? cp_new_stat (fs/stat.c:471) >> [ 51.647732][ T218] ? __pfx_cp_new_stat (fs/stat.c:471) >> >> >> The kernel config and materials to reproduce are available at: >> https://download.01.org/0day-ci/archive/20250820/202508200843.8b006132-lkp@intel.com >> >> >> > -- Mailing list info: https://lists.linux.it/listinfo/ltp ^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <20250812143402.8619-2-christian.koenig@amd.com>
2025-08-20 7:27 ` [LTP] [PATCH 2/2] dma-buf: add warning when dma_fence is signaled from IOCTL kernel test robot
2025-08-21 13:00 ` Christian König via ltp
2025-09-01 11:14 ` Tvrtko Ursulin
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