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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Hello, kernel test robot noticed "UBSAN:array-index-out-of-bounds_in_drivers/gpu/drm/i915/i915_drv.h" on: commit: 3d845c2240623759952e06027546304b127ec1c5 ("[PATCH v1] drm/i915/dg2: enable G8 with a workaround") url: https://github.com/intel-lab-lkp/linux/commits/Raag-Jadav/drm-i915-dg2-enable-G8-with-a-workaround/20241007-202716 base: git://anongit.freedesktop.org/drm-intel for-linux-next patch link: https://lore.kernel.org/all/20241007122424.642796-1-raag.jadav@intel.com/ patch subject: [PATCH v1] drm/i915/dg2: enable G8 with a workaround in testcase: suspend-stress version: with following parameters: mode: freeze iterations: 10 config: x86_64-rhel-8.3-func compiler: gcc-12 test machine: 4 threads (Broadwell) with 8G 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 | Closes: https://lore.kernel.org/oe-lkp/202410141449.699cfd23-oliver.sang@intel.com kern :warn : [ 28.439916] ------------[ cut here ]------------ kern :err : [ 28.440035] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/i915_drv.h:466:28 kern :err : [ 28.440211] index 58 is out of range for type 'u32 [2]' kern :warn : [ 28.440322] CPU: 1 UID: 0 PID: 202 Comm: systemd-udevd Not tainted 6.12.0-rc1-00198-g3d845c224062 #1 kern :warn : [ 28.440489] Hardware name: /NUC5i3RYB, BIOS RYBDWi35.86A.0363.2017.0316.1028 03/16/2017 kern :warn : [ 28.440636] Call Trace: kern :warn : [ 28.440703] kern :warn : [ 28.440764] dump_stack_lvl (lib/dump_stack.c:123 (discriminator 1)) kern :warn : [ 28.440862] __ubsan_handle_out_of_bounds (lib/ubsan.c:232 lib/ubsan.c:429) kern :warn : [ 28.440977] gt_init_workarounds (drivers/gpu/drm/i915/i915_drv.h:466 drivers/gpu/drm/i915/gt/intel_workarounds.c:1689) i915 kern :warn : [ 28.441968] ? __pfx_gt_init_workarounds (drivers/gpu/drm/i915/gt/intel_workarounds.c:1665) i915 kern :warn : [ 28.442781] ? fwtable_write32 (drivers/gpu/drm/i915/intel_uncore.c:2012 (discriminator 11)) i915 kern :warn : [ 28.443526] intel_gt_init_workarounds (drivers/gpu/drm/i915/gt/intel_workarounds.c:1725) i915 kern :warn : [ 28.444297] intel_gt_init (drivers/gpu/drm/i915/gt/intel_gt.c:715) i915 kern :warn : [ 28.445032] i915_gem_init (drivers/gpu/drm/i915/i915_gem.c:1191) i915 kern :warn : [ 28.445793] i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:799) i915 kern :warn : [ 28.446517] ? __pfx_i915_driver_probe (drivers/gpu/drm/i915/i915_driver.c:751) i915 kern :warn : [ 28.447243] ? drm_privacy_screen_get (drivers/gpu/drm/drm_privacy_screen.c:168) drm kern :warn : [ 28.447499] ? intel_display_driver_probe_defer (drivers/gpu/drm/i915/display/intel_display_driver.c:81) i915 kern :warn : [ 28.448300] ? i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:996) i915 kern :warn : [ 28.449003] ? __pfx_i915_pci_probe (drivers/gpu/drm/i915/i915_pci.c:957) i915 kern :warn : [ 28.449712] local_pci_probe (drivers/pci/pci-driver.c:324) kern :warn : [ 28.449811] pci_call_probe (drivers/pci/pci-driver.c:392) kern :warn : [ 28.449905] ? _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) kern :warn : [ 28.449998] ? __pfx_pci_call_probe (drivers/pci/pci-driver.c:352) kern :warn : [ 28.450095] ? kernfs_add_one (fs/kernfs/dir.c:819) kern :warn : [ 28.450190] ? pci_assign_irq (drivers/pci/irq.c:149) kern :warn : [ 28.450282] ? pci_match_device (drivers/pci/pci-driver.c:159 (discriminator 1)) kern :warn : [ 28.450379] ? 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:557 (discriminator 1)) kern :warn : [ 28.450465] pci_device_probe (drivers/pci/pci-driver.c:452) kern :warn : [ 28.450557] ? pci_dma_configure (drivers/pci/pci-driver.c:1656) kern :warn : [ 28.450653] really_probe (drivers/base/dd.c:579 drivers/base/dd.c:658) kern :warn : [ 28.450741] __driver_probe_device (drivers/base/dd.c:738 drivers/base/dd.c:798) kern :warn : [ 28.450841] driver_probe_device (drivers/base/dd.c:830) kern :warn : [ 28.450937] __driver_attach (drivers/base/dd.c:1217) kern :warn : [ 28.451028] ? __pfx___driver_attach (drivers/base/dd.c:1157) kern :warn : [ 28.451124] bus_for_each_dev (drivers/base/bus.c:369) kern :warn : [ 28.451217] ? __pfx_bus_for_each_dev (drivers/base/bus.c:358) kern :warn : [ 28.451318] ? klist_add_tail (include/linux/list.h:150 include/linux/list.h:183 lib/klist.c:104 lib/klist.c:137) kern :warn : [ 28.451410] bus_add_driver (drivers/base/bus.c:675) kern :warn : [ 28.451500] driver_register (drivers/base/driver.c:246) kern :warn : [ 28.451594] i915_init (drivers/gpu/drm/i915/i915_driver.c:1395) i915 kern :warn : [ 28.452466] ? __pfx_i915_init (drivers/gpu/drm/i915/i915_config.c:13) i915 kern :warn : [ 28.453207] do_one_initcall (init/main.c:1269) kern :warn : [ 28.453304] ? __pfx_do_one_initcall (init/main.c:1260) kern :warn : [ 28.453408] ? kasan_unpoison (mm/kasan/shadow.c:157 mm/kasan/shadow.c:151 mm/kasan/shadow.c:182) kern :warn : [ 28.453499] ? kasan_unpoison (mm/kasan/shadow.c:156 mm/kasan/shadow.c:182) kern :warn : [ 28.453592] do_init_module (kernel/module/main.c:2543) kern :warn : [ 28.453687] init_module_from_file (kernel/module/main.c:3198) kern :warn : [ 28.453787] ? __pfx_init_module_from_file (kernel/module/main.c:3174) kern :warn : [ 28.453895] ? __pfx_userfaultfd_unmap_complete (fs/userfaultfd.c:810) kern :warn : [ 28.454012] ? __pfx__raw_spin_lock (kernel/locking/spinlock.c:153) kern :warn : [ 28.454112] idempotent_init_module (kernel/module/main.c:3210) kern :warn : [ 28.454214] ? __pfx_idempotent_init_module (kernel/module/main.c:3202) kern :warn : [ 28.454321] ? __pfx___seccomp_filter (kernel/seccomp.c:1218) kern :warn : [ 28.454424] ? fdget (include/linux/atomic/atomic-arch-fallback.h:479 include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1141 fs/file.c:1155) kern :warn : [ 28.454504] ? security_capable (security/security.c:1142) kern :warn : [ 28.454599] __x64_sys_finit_module (include/linux/file.h:68 kernel/module/main.c:3238 kernel/module/main.c:3220 kernel/module/main.c:3220) kern :warn : [ 28.454698] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) kern :warn : [ 28.454790] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) kern :warn : [ 28.454900] RIP: 0033:0x7efbffb92229 kern :warn : [ 28.454984] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 3f 4c 2b 00 f7 d8 64 89 01 48 All code ======== 0: 00 f3 add %dh,%bl 2: c3 retq 3: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 40 00 nopl 0x0(%rax) 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 8b 0d 3f 4c 2b 00 mov 0x2b4c3f(%rip),%rcx # 0x2b4c79 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 retq 9: 48 8b 0d 3f 4c 2b 00 mov 0x2b4c3f(%rip),%rcx # 0x2b4c4f 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W kern :warn : [ 28.455283] RSP: 002b:00007ffe0d7f9428 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 kern :warn : [ 28.455429] RAX: ffffffffffffffda RBX: 000055b5a7168b10 RCX: 00007efbffb92229 kern :warn : [ 28.455562] RDX: 0000000000000000 RSI: 00007efc004ab265 RDI: 0000000000000014 kern :warn : [ 28.455695] RBP: 00007efc004ab265 R08: 0000000000000000 R09: 00007ffe0d7f99a0 kern :warn : [ 28.455826] R10: 0000000000000014 R11: 0000000000000246 R12: 0000000000000000 kern :warn : [ 28.455959] R13: 000055b5a7170fe0 R14: 0000000000020000 R15: 000055b575213cbc kern :warn : [ 28.456095] kern :warn : [ 28.456422] ---[ end trace ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241014/202410141449.699cfd23-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki