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=?us-ascii?Q?aA=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 6f777704-10bb-4208-3286-08dd263d9dc4 X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Dec 2024 06:13:43.9226 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: vW3Z8H0kVeUMhE/3pA/NbzskyJOOqB+ko0Hva3vsYJ9VegemuI6LC3UB5xKiMWWk4iIV4US92ovSC951tXSfrA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR11MB6668 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "BUG:unable_to_handle_page_fault_for_address" on: commit: 54bd8ce1737414436322ddcda7634ad0a6f499a1 ("srcu: Make SRCU readers use ->srcu_ctrs for counter selection") https://github.com/paulmckrcu/linux dev.2024.12.23a in testcase: rcutorture version: with following parameters: runtime: 300s test: default torture_type: srcu config: i386-randconfig-014-20241227 compiler: gcc-11 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +---------------------------------------------+------------+------------+ | | 75e0a2b0b3 | 54bd8ce173 | +---------------------------------------------+------------+------------+ | boot_successes | 12 | 0 | | boot_failures | 0 | 12 | | BUG:unable_to_handle_page_fault_for_address | 0 | 12 | | Oops | 0 | 12 | | EIP:__srcu_read_lock | 0 | 12 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 12 | +---------------------------------------------+------------+------------+ 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/202412271357.91770b27-lkp@intel.com [ 155.064720][ T856] BUG: unable to handle page fault for address: 243f1000 [ 155.065336][ T856] #PF: supervisor write access in kernel mode [ 155.066547][ T856] #PF: error_code(0x0002) - not-present page [ 155.067393][ T856] *pde = 00000000 [ 155.068187][ T856] Oops: Oops: 0002 [#1] PREEMPT SMP [ 155.069080][ T856] CPU: 1 UID: 0 PID: 856 Comm: rcu_torture_rea Not tainted 6.13.0-rc1-00069-g54bd8ce17374 #1 [ 155.071249][ T856] EIP: __srcu_read_lock (kernel/rcu/srcutree.c:749) [ 155.072290][ T856] Code: d7 b1 00 85 f6 74 0c e8 48 5f 00 00 83 3b 00 74 02 0f 0b 58 5b 5e 5d c3 8b 00 f0 83 44 24 fc 00 83 c0 07 83 e0 fc c3 8b 50 04 <64> ff 02 f0 83 44 24 fc 00 2b 50 08 89 d0 c1 f8 03 c3 55 89 e5 56 All code ======== 0: d7 xlat %ds:(%rbx) 1: b1 00 mov $0x0,%cl 3: 85 f6 test %esi,%esi 5: 74 0c je 0x13 7: e8 48 5f 00 00 call 0x5f54 c: 83 3b 00 cmpl $0x0,(%rbx) f: 74 02 je 0x13 11: 0f 0b ud2 13: 58 pop %rax 14: 5b pop %rbx 15: 5e pop %rsi 16: 5d pop %rbp 17: c3 ret 18: 8b 00 mov (%rax),%eax 1a: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 20: 83 c0 07 add $0x7,%eax 23: 83 e0 fc and $0xfffffffc,%eax 26: c3 ret 27: 8b 50 04 mov 0x4(%rax),%edx 2a:* 64 ff 02 incl %fs:(%rdx) <-- trapping instruction 2d: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 33: 2b 50 08 sub 0x8(%rax),%edx 36: 89 d0 mov %edx,%eax 38: c1 f8 03 sar $0x3,%eax 3b: c3 ret 3c: 55 push %rbp 3d: 89 e5 mov %esp,%ebp 3f: 56 push %rsi Code starting with the faulting instruction =========================================== 0: 64 ff 02 incl %fs:(%rdx) 3: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 9: 2b 50 08 sub 0x8(%rax),%edx c: 89 d0 mov %edx,%eax e: c1 f8 03 sar $0x3,%eax 11: c3 ret 12: 55 push %rbp 13: 89 e5 mov %esp,%ebp 15: 56 push %rsi [ 155.076009][ T856] EAX: eec8a380 EBX: eec8a380 ECX: e707e540 EDX: 00000000 [ 155.077234][ T856] ESI: 00000000 EDI: 00000020 EBP: edf09c9c ESP: edf09c90 [ 155.078468][ T856] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 155.079782][ T856] CR0: 80050033 CR2: 243f1000 CR3: 067be000 CR4: 00040690 [ 155.080734][ T856] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 155.081570][ T856] DR6: fffe0ff0 DR7: 00000400 [ 155.082104][ T856] Call Trace: [ 155.082536][ T856] ? show_regs (arch/x86/kernel/dumpstack.c:479 arch/x86/kernel/dumpstack.c:465) [ 155.083000][ T856] ? __die_body (arch/x86/kernel/dumpstack.c:421) [ 155.083618][ T856] ? __die (arch/x86/kernel/dumpstack.c:435) [ 155.084048][ T856] ? page_fault_oops (arch/x86/mm/fault.c:712) [ 155.084673][ T856] ? kernelmode_fixup_or_oops+0x46/0x4e [ 155.085443][ T856] ? __bad_area_nosemaphore+0x2b/0x1c9 [ 155.086263][ T856] ? bad_area_nosemaphore (arch/x86/mm/fault.c:835) [ 155.086840][ T856] ? do_user_addr_fault (arch/x86/mm/fault.c:1280 (discriminator 1)) [ 155.087467][ T856] ? trace_irq_disable (include/trace/events/preemptirq.h:36 (discriminator 57)) [ 155.087967][ T856] ? exc_page_fault (arch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:87 arch/x86/include/asm/irqflags.h:147 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) [ 155.088600][ T856] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 155.089309][ T856] ? handle_exception (arch/x86/entry/entry_32.S:1055) [ 155.089950][ T856] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 155.090754][ T856] ? __srcu_read_lock (kernel/rcu/srcutree.c:749) [ 155.091358][ T856] ? rcu_torture_writer_state_getname (kernel/rcu/rcutorture.c:287) rcutorture [ 155.092202][ T856] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1494) [ 155.092910][ T856] ? __srcu_read_lock (kernel/rcu/srcutree.c:749) [ 155.093526][ T856] ? srcu_read_lock (include/linux/srcu.h:165 include/linux/srcu.h:257) rcutorture [ 155.094198][ T856] srcu_torture_read_lock (kernel/rcu/rcutorture.c:693) rcutorture [ 155.103773][ T856] rcutorture_one_extend+0x14c/0x38f rcutorture [ 155.104728][ T856] rcu_torture_one_read (kernel/rcu/rcutorture.c:2163 (discriminator 3)) rcutorture [ 155.105530][ T856] ? validate_chain (kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3872) [ 155.106112][ T856] ? sched_clock_noinstr (arch/x86/kernel/tsc.c:269) [ 155.106743][ T856] rcu_torture_reader (kernel/rcu/rcutorture.c:2286) rcutorture [ 155.107520][ T856] ? rcu_torture_one_read (kernel/rcu/rcutorture.c:2248) rcutorture [ 155.108331][ T856] kthread (kernel/kthread.c:391) [ 155.108818][ T856] ? rcu_torture_read_exit_child (kernel/rcu/rcutorture.c:2269) rcutorture [ 155.109677][ T856] ? list_del_init (include/linux/posix-timers.h:225) [ 155.110238][ T856] ret_from_fork (arch/x86/kernel/process.c:153) [ 155.110778][ T856] ? list_del_init (include/linux/posix-timers.h:225) [ 155.111328][ T856] ret_from_fork_asm (arch/x86/entry/entry_32.S:737) [ 155.111766][ T856] entry_INT80_32 (arch/x86/entry/entry_32.S:945) [ 155.115711][ T856] Modules linked in: rcutorture(+) torture [ 155.117176][ T856] CR2: 00000000243f1000 [ 155.118089][ T856] ---[ end trace 0000000000000000 ]--- [ 155.119343][ T856] EIP: __srcu_read_lock (kernel/rcu/srcutree.c:749) [ 155.120400][ T856] Code: d7 b1 00 85 f6 74 0c e8 48 5f 00 00 83 3b 00 74 02 0f 0b 58 5b 5e 5d c3 8b 00 f0 83 44 24 fc 00 83 c0 07 83 e0 fc c3 8b 50 04 <64> ff 02 f0 83 44 24 fc 00 2b 50 08 89 d0 c1 f8 03 c3 55 89 e5 56 All code ======== 0: d7 xlat %ds:(%rbx) 1: b1 00 mov $0x0,%cl 3: 85 f6 test %esi,%esi 5: 74 0c je 0x13 7: e8 48 5f 00 00 call 0x5f54 c: 83 3b 00 cmpl $0x0,(%rbx) f: 74 02 je 0x13 11: 0f 0b ud2 13: 58 pop %rax 14: 5b pop %rbx 15: 5e pop %rsi 16: 5d pop %rbp 17: c3 ret 18: 8b 00 mov (%rax),%eax 1a: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 20: 83 c0 07 add $0x7,%eax 23: 83 e0 fc and $0xfffffffc,%eax 26: c3 ret 27: 8b 50 04 mov 0x4(%rax),%edx 2a:* 64 ff 02 incl %fs:(%rdx) <-- trapping instruction 2d: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 33: 2b 50 08 sub 0x8(%rax),%edx 36: 89 d0 mov %edx,%eax 38: c1 f8 03 sar $0x3,%eax 3b: c3 ret 3c: 55 push %rbp 3d: 89 e5 mov %esp,%ebp 3f: 56 push %rsi Code starting with the faulting instruction =========================================== 0: 64 ff 02 incl %fs:(%rdx) 3: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp) 9: 2b 50 08 sub 0x8(%rax),%edx c: 89 d0 mov %edx,%eax e: c1 f8 03 sar $0x3,%eax 11: c3 ret 12: 55 push %rbp 13: 89 e5 mov %esp,%ebp 15: 56 push %rsi The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241227/202412271357.91770b27-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki