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Tue, 31 Mar 2026 13:37:10 +0000 Date: Tue, 31 Mar 2026 21:37:04 +0800 From: kernel test robot To: Dmitry Antipov CC: , , , , , Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Dmitry Antipov , Subject: Re: [RFC PATCH] modules: extend {kstrdup,kfree}_const() to handle per-module .rodata Message-ID: <202603312130.f9ed8d89-lkp@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20260327132247.861984-1-dmantipov@yandex.ru> X-ClientProxiedBy: TPYP295CA0019.TWNP295.PROD.OUTLOOK.COM (2603:1096:7d0:a::14) To PH0PR11MB5832.namprd11.prod.outlook.com (2603:10b6:510:141::7) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH0PR11MB5832:EE_|PH8PR11MB9722:EE_ X-MS-Office365-Filtering-Correlation-Id: 2fea70f2-3a81-4aa6-491d-08de8f2a9c42 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|22082099003|18002099003|56012099003; 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[ 17.210058][ C0] Oops: invalid opcode: 0000 [#1] [ 17.210470][ C0] CPU: 0 UID: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 7.0.0-rc5-00667-g0803ad97505a #1 PREEMPT(full) 4fef6f10f7892f9689059524fd4d050b8163a9be [ 17.211614][ C0] EIP: __phys_addr (arch/x86/mm/physaddr.c:66 (discriminator 3)) [ 17.211995][ C0] Code: e5 56 53 85 c0 78 09 0f 0b b8 ec a1 e6 81 eb 21 80 3d f8 e9 4d 82 00 89 c3 8d b0 00 00 00 80 74 15 e8 cf c5 19 00 84 c0 74 0c <0f> 0b b8 e0 a1 e6 81 e8 77 3e fb ff a1 30 14 d3 82 85 c0 74 2a 89 All code ======== 0: e5 56 in $0x56,%eax 2: 53 push %rbx 3: 85 c0 test %eax,%eax 5: 78 09 js 0x10 7: 0f 0b ud2 9: b8 ec a1 e6 81 mov $0x81e6a1ec,%eax e: eb 21 jmp 0x31 10: 80 3d f8 e9 4d 82 00 cmpb $0x0,-0x7db21608(%rip) # 0xffffffff824dea0f 17: 89 c3 mov %eax,%ebx 19: 8d b0 00 00 00 80 lea -0x80000000(%rax),%esi 1f: 74 15 je 0x36 21: e8 cf c5 19 00 call 0x19c5f5 26: 84 c0 test %al,%al 28: 74 0c je 0x36 2a:* 0f 0b ud2 <-- trapping instruction 2c: b8 e0 a1 e6 81 mov $0x81e6a1e0,%eax 31: e8 77 3e fb ff call 0xfffffffffffb3ead 36: a1 30 14 d3 82 85 c0 movabs 0x2a74c08582d31430,%eax 3d: 74 2a 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: b8 e0 a1 e6 81 mov $0x81e6a1e0,%eax 7: e8 77 3e fb ff call 0xfffffffffffb3e83 c: a1 30 14 d3 82 85 c0 movabs 0x2a74c08582d31430,%eax 13: 74 2a 15: 89 .byte 0x89 [ 17.214426][ C0] EAX: f7e9f401 EBX: f7e9f4ac ECX: fffff000 EDX: ff5fe000 [ 17.215476][ C0] ESI: 77e9f4ac EDI: 00000000 EBP: 80b0be68 ESP: 80b0be60 [ 17.216539][ C0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010202 [ 17.217741][ C0] CR0: 80050033 CR2: 7fbf9dd8 CR3: 032cd000 CR4: 000406b0 [ 17.218849][ C0] Call Trace: [ 17.219371][ C0] kfree (mm/slub.c:6474 (discriminator 1)) [ 17.220011][ C0] ? rcu_read_unlock (include/linux/rcupdate.h:884) [ 17.220786][ C0] kfree_const (mm/util.c:49) [ 17.221549][ C0] kernfs_free_rcu (fs/kernfs/dir.c:550) [ 17.222201][ C0] ? lock_is_held (arch/x86/events/intel/core.c:4034) [ 17.222920][ C0] rcu_do_batch+0x329/0x6a8 [ 17.223812][ C0] rcu_core (kernel/rcu/tree.c:2871) [ 17.224493][ C0] rcu_core_si (kernel/rcu/tree.c:2887) [ 17.225255][ C0] handle_softirqs (arch/x86/include/asm/atomic.h:23 include/linux/atomic/atomic-arch-fallback.h:457 include/linux/jump_label.h:262 include/trace/events/irq.h:142 kernel/softirq.c:623) [ 17.226002][ C0] run_ksoftirqd (kernel/softirq.c:479 kernel/softirq.c:1064 kernel/softirq.c:1055) [ 17.226737][ C0] smpboot_thread_fn (kernel/smpboot.c:160) [ 17.227510][ C0] ? sort_range (kernel/smpboot.c:103) [ 17.228198][ C0] kthread (kernel/kthread.c:438) [ 17.228839][ C0] ? sort_range (kernel/smpboot.c:103) [ 17.229601][ C0] ? kthread_affine_node (kernel/kthread.c:381) [ 17.230400][ C0] ret_from_fork (arch/x86/kernel/process.c:164) [ 17.231112][ C0] ? kthread_affine_node (kernel/kthread.c:381) [ 17.231971][ C0] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) [ 17.232755][ C0] entry_INT80_32 (arch/x86/entry/entry_32.S:942) [ 17.233621][ C0] Modules linked in: usbtest(+) serio_raw evdev parport_pc parport qemu_fw_cfg button [ 17.235190][ C0] ---[ end trace 0000000000000000 ]--- [ 17.236068][ C0] EIP: __phys_addr (arch/x86/mm/physaddr.c:66 (discriminator 3)) [ 17.236831][ C0] Code: e5 56 53 85 c0 78 09 0f 0b b8 ec a1 e6 81 eb 21 80 3d f8 e9 4d 82 00 89 c3 8d b0 00 00 00 80 74 15 e8 cf c5 19 00 84 c0 74 0c <0f> 0b b8 e0 a1 e6 81 e8 77 3e fb ff a1 30 14 d3 82 85 c0 74 2a 89 All code ======== 0: e5 56 in $0x56,%eax 2: 53 push %rbx 3: 85 c0 test %eax,%eax 5: 78 09 js 0x10 7: 0f 0b ud2 9: b8 ec a1 e6 81 mov $0x81e6a1ec,%eax e: eb 21 jmp 0x31 10: 80 3d f8 e9 4d 82 00 cmpb $0x0,-0x7db21608(%rip) # 0xffffffff824dea0f 17: 89 c3 mov %eax,%ebx 19: 8d b0 00 00 00 80 lea -0x80000000(%rax),%esi 1f: 74 15 je 0x36 21: e8 cf c5 19 00 call 0x19c5f5 26: 84 c0 test %al,%al 28: 74 0c je 0x36 2a:* 0f 0b ud2 <-- trapping instruction 2c: b8 e0 a1 e6 81 mov $0x81e6a1e0,%eax 31: e8 77 3e fb ff call 0xfffffffffffb3ead 36: a1 30 14 d3 82 85 c0 movabs 0x2a74c08582d31430,%eax 3d: 74 2a 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: b8 e0 a1 e6 81 mov $0x81e6a1e0,%eax 7: e8 77 3e fb ff call 0xfffffffffffb3e83 c: a1 30 14 d3 82 85 c0 movabs 0x2a74c08582d31430,%eax 13: 74 2a 15: 89 .byte 0x89 The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260331/202603312130.f9ed8d89-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki