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Remove 'mm' argument from unuse_temporary_mm() again") https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git x86/alternatives in testcase: boot config: x86_64-randconfig-161-20250413 compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +--------------------------------------------------+------------+------------+ | | d376972c98 | 4873f494bb | +--------------------------------------------------+------------+------------+ | WARNING:at_arch/x86/mm/tlb.c:#switch_mm_irqs_off | 0 | 12 | | RIP:switch_mm_irqs_off | 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/202504171640.c81d6f67-lkp@intel.com [ 1.746877][ T9] ------------[ cut here ]------------ [ 1.747460][ T9] WARNING: CPU: 0 PID: 9 at arch/x86/mm/tlb.c:913 switch_mm_irqs_off (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/mm/tlb.c:913) [ 1.748353][ T9] Modules linked in: [ 1.748774][ T9] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.15.0-rc1-00055-g4873f494bbe4 #1 PREEMPT(undef) e8aa378fdd0841698e07350fa58f890f8e93d36c [ 1.749754][ T9] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 1.749754][ T9] Workqueue: events once_deferred [ 1.749754][ T9] RIP: 0010:switch_mm_irqs_off (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/mm/tlb.c:913) [ 1.749754][ T9] Code: 44 8b 6c 24 14 be 08 00 00 00 4c 89 e8 48 c1 e8 06 49 8d bc c4 00 07 00 00 e8 66 1d 6e 00 4d 0f a3 ac 24 00 07 00 00 72 04 90 <0f> 0b 90 48 81 fb 40 af 65 86 74 2f 44 8b 6c 24 14 4c 8d b3 00 07 All code ======== 0: 44 8b 6c 24 14 mov 0x14(%rsp),%r13d 5: be 08 00 00 00 mov $0x8,%esi a: 4c 89 e8 mov %r13,%rax d: 48 c1 e8 06 shr $0x6,%rax 11: 49 8d bc c4 00 07 00 lea 0x700(%r12,%rax,8),%rdi 18: 00 19: e8 66 1d 6e 00 call 0x6e1d84 1e: 4d 0f a3 ac 24 00 07 bt %r13,0x700(%r12) 25: 00 00 27: 72 04 jb 0x2d 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 48 81 fb 40 af 65 86 cmp $0xffffffff8665af40,%rbx 34: 74 2f je 0x65 36: 44 8b 6c 24 14 mov 0x14(%rsp),%r13d 3b: 4c rex.WR 3c: 8d .byte 0x8d 3d: b3 00 mov $0x0,%bl 3f: 07 (bad) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 48 81 fb 40 af 65 86 cmp $0xffffffff8665af40,%rbx a: 74 2f je 0x3b c: 44 8b 6c 24 14 mov 0x14(%rsp),%r13d 11: 4c rex.WR 12: 8d .byte 0x8d 13: b3 00 mov $0x0,%bl 15: 07 (bad) [ 1.749754][ T9] RSP: 0000:ffff888103e779f8 EFLAGS: 00010046 [ 1.749754][ T9] RAX: 0000000000000001 RBX: ffffffff8665af40 RCX: 0000000000000000 [ 1.749754][ T9] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 1.749754][ T9] RBP: 1ffff110207cef42 R08: 0000000000000000 R09: 0000000000000000 [ 1.749754][ T9] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100058040 [ 1.749754][ T9] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888103e68490 [ 1.749754][ T9] FS: 0000000000000000(0000) GS:0000000000000000(0000) knlGS:0000000000000000 [ 1.749754][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.749754][ T9] CR2: ffff88843ffff000 CR3: 000000010005c000 CR4: 00000000000406f0 [ 1.749754][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1.749754][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1.749754][ T9] Call Trace: [ 1.749754][ T9] [ 1.749754][ T9] ? cr4_update_pce (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/mm/tlb.c:778) [ 1.749754][ T9] unuse_temporary_mm (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/include/asm/debugreg.h:115 (discriminator 31) kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/mm/tlb.c:1034 (discriminator 31)) [ 1.749754][ T9] ? serial8250_isa_init_ports (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/include/asm/jump_label.h:46 kbuild/obj/consumer/x86_64-randconfig-161-20250413/drivers/tty/serial/8250/8250_platform.c:104) [ 1.749754][ T9] __text_poke (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2221) [ 1.749754][ T9] ? add_nop (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2119) [ 1.749754][ T9] ? optimize_nops (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2132) [ 1.749754][ T9] ? serial8250_isa_init_ports (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/include/asm/jump_label.h:46 kbuild/obj/consumer/x86_64-randconfig-161-20250413/drivers/tty/serial/8250/8250_platform.c:104) [ 1.749754][ T9] smp_text_poke_batch_finish (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2563 (discriminator 3)) [ 1.749754][ T9] ? mutex_trylock (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/locking/mutex.c:901) [ 1.749754][ T9] ? mutex_lock_io_nested (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/locking/mutex.c:745) [ 1.749754][ T9] ? smp_text_poke_sync_each_cpu (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2527) [ 1.749754][ T9] arch_jump_label_transform_apply (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/jump_label.c:147) [ 1.749754][ T9] static_key_disable_cpuslocked (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/jump_label.c:32 kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/jump_label.c:241) [ 1.749754][ T9] once_deferred (kbuild/obj/consumer/x86_64-randconfig-161-20250413/lib/once.c:21 (discriminator 5)) [ 1.749754][ T9] process_one_work (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3243) [ 1.749754][ T9] ? process_one_work (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3245) [ 1.749754][ T9] ? show_cpu_pools_hogs (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3140) [ 1.749754][ T9] ? assign_work (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:1200) [ 1.749754][ T9] worker_thread (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3313 kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3400) [ 1.749754][ T9] ? rescuer_thread (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/workqueue.c:3346) [ 1.749754][ T9] kthread (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/kthread.c:464) [ 1.749754][ T9] ? local_clock_noinstr (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/sched/clock.c:270 kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/sched/clock.c:306) [ 1.749754][ T9] ? kthread_is_per_cpu (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/kthread.c:413) [ 1.749754][ T9] ? ret_from_fork (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/process.c:152) [ 1.749754][ T9] ? lockdep_hardirqs_on_prepare (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/locking/lockdep.c:472 kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/locking/lockdep.c:4412) [ 1.749754][ T9] ? kthread_is_per_cpu (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/kthread.c:413) [ 1.749754][ T9] ret_from_fork (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/process.c:159) [ 1.749754][ T9] ? kthread_is_per_cpu (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/kthread.c:413) [ 1.749754][ T9] ret_from_fork_asm (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/entry/entry_64.S:258) [ 1.749754][ T9] [ 1.749754][ T9] irq event stamp: 68 [ 1.749754][ T9] hardirqs last enabled at (67): _raw_spin_unlock_irq (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/include/asm/paravirt.h:686 kbuild/obj/consumer/x86_64-randconfig-161-20250413/include/linux/spinlock_api_smp.h:159 kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/locking/spinlock.c:202) [ 1.749754][ T9] hardirqs last disabled at (68): __text_poke (kbuild/obj/consumer/x86_64-randconfig-161-20250413/arch/x86/kernel/alternative.c:2179 (discriminator 1)) [ 1.749754][ T9] softirqs last enabled at (0): copy_process (kbuild/obj/consumer/x86_64-randconfig-161-20250413/kernel/fork.c:2375) [ 1.749754][ T9] softirqs last disabled at (0): 0x0 [ 1.749754][ T9] ---[ end trace 0000000000000000 ]--- [ 1.754021][ T1] Performance Events: unsupported CPU family 6 model 42 no PMU driver, software events only. The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250417/202504171640.c81d6f67-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki