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"WARNING:at_mm/sparse.c:#sparse_init" on: commit: a20f815a6f361e18a0a2a9480b5a5340c5860c7f ("[PATCH v2 07/11] x86: drop SWIOTLB and PHYS_ADDR_T_64BIT for PAE") url: https://github.com/intel-lab-lkp/linux/commits/Arnd-Bergmann/x86-Kconfig-Geode-CPU-has-cmpxchg8b/20241210-225443 base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git f576cfc3d433316990802cd521ddea645eb3971b patch link: https://lore.kernel.org/all/20241210144945.2325330-8-arnd@kernel.org/ patch subject: [PATCH v2 07/11] x86: drop SWIOTLB and PHYS_ADDR_T_64BIT for PAE in testcase: boot config: i386-randconfig-001-20241213 compiler: gcc-12 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (please refer to attached dmesg/kmsg for entire log/backtrace) +------------------------------------------------+------------+------------+ | | 620a8e2d2b | a20f815a6f | +------------------------------------------------+------------+------------+ | WARNING:at_mm/sparse.c:#sparse_init | 0 | 12 | | EIP:sparse_init | 0 | 12 | | BUG:kernel_NULL_pointer_dereference,address | 0 | 12 | | Oops | 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/202412201005.77fb063-lkp@intel.com [ 0.068283][ T0] ------------[ cut here ]------------ [ 0.068644][ T0] WARNING: CPU: 0 PID: 0 at mm/sparse.c:149 sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.069169][ T0] Modules linked in: [ 0.069424][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.13.0-rc2-00153-ga20f815a6f36 #1 55e1ad47972e976fedebf027f6853ef569639c5a [ 0.070285][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 0.070972][ T0] EIP: sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.071277][ T0] Code: 85 d2 74 d1 8b 0d 44 5f 72 b2 85 c9 7e 1c 89 54 24 08 31 c0 31 d2 89 44 24 0c 89 54 24 04 c7 04 24 d8 e5 04 b2 e8 55 ea a2 fe <0f> 0b eb a7 90 8b 0d 80 16 e7 b2 31 d2 8d b4 26 00 00 00 00 90 83 All code ======== 0: 85 d2 test %edx,%edx 2: 74 d1 je 0xffffffffffffffd5 4: 8b 0d 44 5f 72 b2 mov -0x4d8da0bc(%rip),%ecx # 0xffffffffb2725f4e a: 85 c9 test %ecx,%ecx c: 7e 1c jle 0x2a e: 89 54 24 08 mov %edx,0x8(%rsp) 12: 31 c0 xor %eax,%eax 14: 31 d2 xor %edx,%edx 16: 89 44 24 0c mov %eax,0xc(%rsp) 1a: 89 54 24 04 mov %edx,0x4(%rsp) 1e: c7 04 24 d8 e5 04 b2 movl $0xb204e5d8,(%rsp) 25: e8 55 ea a2 fe call 0xfffffffffea2ea7f 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb a7 jmp 0xffffffffffffffd5 2e: 90 nop 2f: 8b 0d 80 16 e7 b2 mov -0x4d18e980(%rip),%ecx # 0xffffffffb2e716b5 35: 31 d2 xor %edx,%edx 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 3e: 90 nop 3f: 83 .byte 0x83 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb a7 jmp 0xffffffffffffffab 4: 90 nop 5: 8b 0d 80 16 e7 b2 mov -0x4d18e980(%rip),%ecx # 0xffffffffb2e7168b b: 31 d2 xor %edx,%edx d: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 14: 90 nop 15: 83 .byte 0x83 [ 0.072580][ T0] EAX: 00000000 EBX: b218feb4 ECX: 00000000 EDX: 0000009f [ 0.073047][ T0] ESI: b218febc EDI: 00000000 EBP: b218fecc ESP: b218feb4 [ 0.073513][ T0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: febc EFLAGS: 00210046 [ 0.074016][ T0] CR0: 80050033 CR2: 00000000 CR3: 02773000 CR4: 00000090 [ 0.074492][ T0] Call Trace: [ 0.074709][ T0] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 0.074989][ T0] ? sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.075283][ T0] ? __warn (kernel/panic.c:748) [ 0.075550][ T0] ? sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.075845][ T0] ? sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.076140][ T0] ? report_bug (lib/bug.c:180 lib/bug.c:219) [ 0.076437][ T0] ? sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.076731][ T0] ? early_fixup_exception (arch/x86/mm/extable.c:415) [ 0.077081][ T0] ? early_idt_handler_common (arch/x86/kernel/head_32.S:352) [ 0.077450][ T0] ? register_lock_class (kernel/locking/lockdep.c:195 kernel/locking/lockdep.c:1322) [ 0.077799][ T0] ? sparse_init (mm/sparse.c:149 mm/sparse.c:227 mm/sparse.c:268 mm/sparse.c:565) [ 0.078113][ T0] ? native_flush_tlb_global (arch/x86/include/asm/irqflags.h:154 arch/x86/mm/tlb.c:1225) [ 0.078480][ T0] paging_init (arch/x86/mm/init_32.c:685) [ 0.078759][ T0] native_pagetable_init (arch/x86/mm/init_32.c:481) [ 0.079101][ T0] ? _printk (kernel/printk/printk.c:2461) [ 0.079367][ T0] ? dma_contiguous_reserve (kernel/dma/contiguous.c:250) [ 0.079722][ T0] setup_arch (arch/x86/kernel/setup.c:1130) [ 0.080011][ T0] start_kernel (init/main.c:924 (discriminator 3)) [ 0.080301][ T0] ? load_ucode_bsp (arch/x86/kernel/cpu/microcode/core.c:135) [ 0.080622][ T0] i386_start_kernel (??:?) [ 0.080936][ T0] startup_32_smp (arch/x86/kernel/head_32.S:292) [ 0.081247][ T0] irq event stamp: 0 [ 0.081500][ T0] hardirqs last enabled at (0): 0x0 [ 0.081922][ T0] hardirqs last disabled at (0): 0x0 [ 0.082349][ T0] softirqs last enabled at (0): 0x0 [ 0.082771][ T0] softirqs last disabled at (0): 0x0 [ 0.083193][ T0] ---[ end trace 0000000000000000 ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241220/202412201005.77fb063-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki