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Hello, kernel test robot noticed "WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault" on: commit: 364ac25d46eea504eb90229d2a1f92e18c1a1eae ("tracing: Guard __DECLARE_TRACE() use of __DO_TRACE_CALL() with SRCU-fast") https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2025.08.13a in testcase: boot config: i386-randconfig-004-20250819 compiler: clang-20 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (please refer to attached dmesg/kmsg for entire log/backtrace) +----------------------------------------------------+------------+------------+ | | c0e2a3f449 | 364ac25d46 | +----------------------------------------------------+------------+------------+ | WARNING:at_arch/x86/mm/fault.c:#do_user_addr_fault | 0 | 12 | | EIP:do_user_addr_fault | 0 | 12 | | BUG:kernel_NULL_pointer_dereference,address | 0 | 12 | | Oops | 0 | 12 | | EIP:do_int80_syscall_32 | 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/202508211038.c93e8603-lkp@intel.com [ 5.974959][ T117] ------------[ cut here ]------------ [ 5.975530][ T117] WARNING: CPU: 1 PID: 117 at arch/x86/mm/fault.c:1276 do_user_addr_fault (ld-temp.o:?) [ 5.976496][ T117] Modules linked in: [ 5.976924][ T117] CPU: 1 UID: 0 PID: 117 Comm: sh Not tainted 6.17.0-rc1-00010-g364ac25d46ee #1 NONE 7aaffa6b74f3c55be0a24cdbe6593fcd4ccf301d [ 5.978263][ T117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 5.979306][ T117] EIP: do_user_addr_fault (ld-temp.o:?) [ 5.979859][ T117] Code: 15 fe ff ff 89 f9 ff 75 f0 e8 96 04 00 00 83 c4 04 e9 03 fe ff ff 89 f9 89 da ff 75 f0 e8 72 01 00 00 83 c4 04 e9 ef fd ff ff <0f> 0b 89 f9 89 da ff 75 f0 e8 fc 03 00 00 83 c4 04 e9 d9 fd ff ff All code ======== 0: 15 fe ff ff 89 adc $0x89fffffe,%eax 5: f9 stc 6: ff 75 f0 push -0x10(%rbp) 9: e8 96 04 00 00 call 0x4a4 e: 83 c4 04 add $0x4,%esp 11: e9 03 fe ff ff jmp 0xfffffffffffffe19 16: 89 f9 mov %edi,%ecx 18: 89 da mov %ebx,%edx 1a: ff 75 f0 push -0x10(%rbp) 1d: e8 72 01 00 00 call 0x194 22: 83 c4 04 add $0x4,%esp 25: e9 ef fd ff ff jmp 0xfffffffffffffe19 2a:* 0f 0b ud2 <-- trapping instruction 2c: 89 f9 mov %edi,%ecx 2e: 89 da mov %ebx,%edx 30: ff 75 f0 push -0x10(%rbp) 33: e8 fc 03 00 00 call 0x434 38: 83 c4 04 add $0x4,%esp 3b: e9 d9 fd ff ff jmp 0xfffffffffffffe19 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 89 f9 mov %edi,%ecx 4: 89 da mov %ebx,%edx 6: ff 75 f0 push -0x10(%rbp) 9: e8 fc 03 00 00 call 0x40a e: 83 c4 04 add $0x4,%esp 11: e9 d9 fd ff ff jmp 0xfffffffffffffdef [ 5.981783][ T117] EAX: 80000000 EBX: 00000000 ECX: 00000000 EDX: 4875de00 [ 5.982461][ T117] ESI: 46bf1f14 EDI: 46bf1f14 EBP: 46bf1ef0 ESP: 46bf1ec4 [ 5.983152][ T117] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010046 [ 5.983885][ T117] CR0: 80050033 CR2: 00000004 CR3: 06fc8000 CR4: 00040690 [ 5.984575][ T117] Call Trace: [ 5.984911][ T117] ? exc_page_fault (ld-temp.o:?) [ 5.985376][ T117] ? pvclock_clocksource_read_nowd (ld-temp.o:?) [ 5.985971][ T117] ? handle_exception (arch/x86/entry/entry_32.S:1048) [ 5.986454][ T117] ? do_int80_syscall_32 (ld-temp.o:?) [ 5.986948][ T117] ? entry_INT80_32 (arch/x86/entry/entry_32.S:945) [ 5.987410][ T117] ? insn_get_code_seg_params (ld-temp.o:?) [ 5.987948][ T117] ? pvclock_clocksource_read_nowd (ld-temp.o:?) [ 5.988547][ T117] ? do_int80_syscall_32 (ld-temp.o:?) [ 5.989050][ T117] ? pvclock_clocksource_read_nowd (ld-temp.o:?) [ 5.989645][ T117] ? do_int80_syscall_32 (ld-temp.o:?) [ 5.990146][ T117] ? entry_INT80_32 (arch/x86/entry/entry_32.S:945) [ 5.990611][ T117] ? irqentry_exit (ld-temp.o:?) [ 5.991053][ T117] ? exc_page_fault (ld-temp.o:?) [ 5.991512][ T117] ? entry_INT80_32 (arch/x86/entry/entry_32.S:945) [ 5.991915][ T117] irq event stamp: 5810 [ 5.992173][ T117] hardirqs last enabled at (5809): do_wait (ld-temp.o:?) [ 5.992686][ T117] hardirqs last disabled at (5810): do_int80_syscall_32 (ld-temp.o:?) [ 5.993245][ T117] softirqs last enabled at (5692): local_bh_enable (ld-temp.o:?) [ 5.993776][ T117] softirqs last disabled at (5690): local_bh_disable (ld-temp.o:?) [ 5.994304][ T117] ---[ end trace 0000000000000000 ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250821/202508211038.c93e8603-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki