hi, Chris Li,
we noticed "This patch does not have functional change" in commit message.
however, the issue seems keep happening randomly while we run up to 100 times.
at the same time, the parent keeps clean.
55aea7978bd8df28 3373e582e78e8aaaf8977b42bc8
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
:100 12% 12:100 dmesg.BUG:kernel_NULL_pointer_dereference,address
:100 3% 3:100 dmesg.BUG:unable_to_handle_page_fault_for_address
:100 16% 16:100 dmesg.EIP:free_pcppages_bulk
:100 15% 15:100 dmesg.Kernel_panic-not_syncing:Fatal_exception
:100 1% 1:100 dmesg.Kernel_panic-not_syncing:Fatal_exception_in_interrupt
:100 16% 16:100 dmesg.Oops:#[##]
:100 16% 16:100 dmesg.boot_failures
and since there is
[ 15.898250][ C0] EIP: free_pcppages_bulk+0x7d/0x200
and free_pcppages_bulk() is changed in this commit, we just report this to you.
FYI
Hello,
kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on:
commit: 3373e582e78e8aaaf8977b42bc8edd8487310033 ("[PATCH RFC 2/2] mm/page_alloc: free_pcppages_bulk clean up")
url: https://github.com/intel-lab-lkp/linux/commits/Chris-Li/mm-page_alloc-safeguard-free_pcppages_bulk/20230818-140815
patch link: https://lore.kernel.org/all/20230817-free_pcppages_bulk-v1-2-c14574a9f80c@xxxxxxxxxx/
patch subject: [PATCH RFC 2/2] mm/page_alloc: free_pcppages_bulk clean up
in testcase: boot
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)
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 <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202308241221.cc5ac84a-oliver.sang@xxxxxxxxx
[ 15.890907][ C0] BUG: kernel NULL pointer dereference, address: 00000005
[ 15.891555][ C0] #PF: supervisor read access in kernel mode
[ 15.892037][ C0] #PF: error_code(0x0000) - not-present page
[ 15.893161][ C0] *pdpt = 000000002c9e7001 *pde = 0000000000000000
[ 15.894410][ C0] Oops: 0000 [#1] SMP PTI
[ 15.895385][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G E 6.5.0-rc4-00242-g3373e582e78e #1
[ 15.896801][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 15.898250][ C0] EIP: free_pcppages_bulk+0x7d/0x200
[ 15.899281][ C0] Code: 8d 34 c6 89 75 e4 83 f8 0c 0f 84 ee 00 00 00 ba ab aa aa aa f7 e2 b8 01 00 00 00 89 d1 d1 e9 d3 e0 89 45 e0 8b 45 e4 8b 50 04 <8b> 72 04
8d 5a fc 83 ee 04 39 c2 0f 84 0a 01 00 00 89 4d e8 eb 28
[ 15.914130][ C0] EAX: e4c7520c EBX: e4c9f510 ECX: 55555555 EDX: 00000001
[ 15.915477][ C0] ESI: e4c7520c EDI: e4c75200 EBP: c1819d98 ESP: c1819d60
[ 15.916755][ C0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210006
[ 15.918067][ C0] CR0: 80050033 CR2: 00000005 CR3: 2ca6a000 CR4: 000406f0
[ 15.919278][ C0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 15.920468][ C0] DR6: fffe0ff0 DR7: 00000400
[ 15.921446][ C0] Call Trace:
[ 15.922298][ C0] <SOFTIRQ>
[ 15.923149][ C0] ? show_regs+0x55/0x80
[ 15.924069][ C0] ? __die+0x1d/0x80
[ 15.924934][ C0] ? page_fault_oops+0x65/0xc0
[ 15.925890][ C0] ? kernelmode_fixup_or_oops+0x73/0x100
[ 15.926986][ C0] ? __bad_area_nosemaphore+0xdc/0x1c0
[ 15.928086][ C0] ? bad_area_nosemaphore+0xf/0x40
[ 15.929061][ C0] ? do_user_addr_fault+0x1ac/0x3c0
[ 15.930036][ C0] ? exc_page_fault+0x51/0x140
[ 15.930957][ C0] ? pvclock_clocksource_read_nowd+0x140/0x140
[ 15.931997][ C0] ? handle_exception+0x133/0x133
[ 15.932938][ C0] ? pmd_clear_huge+0x7b/0x80
[ 15.934885][ C0] ? pvclock_clocksource_read_nowd+0x140/0x140
[ 15.935963][ C0] ? free_pcppages_bulk+0x7d/0x200
[ 15.936915][ C0] ? pvclock_clocksource_read_nowd+0x140/0x140
[ 15.937954][ C0] ? free_pcppages_bulk+0x7d/0x200
[ 15.938876][ C0] free_unref_page_commit+0x120/0x180
[ 15.939826][ C0] free_unref_page+0xe7/0x100
[ 15.940688][ C0] __free_pages+0x87/0xc0
[ 15.941519][ C0] __free_slab+0xa1/0x100
[ 15.942383][ C0] free_slab+0x27/0xc0
[ 15.943187][ C0] discard_slab+0x38/0x40
[ 15.944014][ C0] __unfreeze_partials+0x20c/0x240
[ 15.946439][ C0] put_cpu_partial+0x5b/0x80
[ 15.947347][ C0] __slab_free+0x287/0x380
[ 15.948207][ C0] ? __mod_memcg_lruvec_state+0x3e/0x80
[ 15.949138][ C0] kmem_cache_free+0x329/0x340
[ 15.950003][ C0] ? mt_free_rcu+0x10/0x40
[ 15.950805][ C0] ? free_task+0x4d/0x80
[ 15.951594][ C0] ? mt_free_rcu+0x10/0x40
[ 15.952390][ C0] mt_free_rcu+0x10/0x40
[ 15.953181][ C0] rcu_do_batch+0x158/0x440
[ 15.953998][ C0] rcu_core+0xce/0x1c0
[ 15.954751][ C0] rcu_core_si+0xd/0x40
[ 15.955512][ C0] __do_softirq+0xad/0x233
[ 15.956293][ C0] ? __lock_text_end+0x3/0x3
[ 15.957084][ C0] call_on_stack+0x45/0x80
[ 15.957871][ C0] </SOFTIRQ>
[ 15.958525][ C0] ? irq_exit_rcu+0x6a/0xc0
[ 15.959284][ C0] ? sysvec_apic_timer_interrupt+0x27/0x40
[ 15.960136][ C0] ? handle_exception+0x133/0x133
[ 15.960900][ C0] ? alarm_handle_timer+0xfb/0x100
[ 15.961669][ C0] ? sysvec_call_function_single+0x40/0x40
[ 15.962542][ C0] ? default_idle+0xb/0x40
[ 15.963234][ C0] ? sysvec_call_function_single+0x40/0x40
[ 15.964026][ C0] ? default_idle+0xb/0x40
[ 15.964703][ C0] ? arch_cpu_idle+0x8/0x40
[ 15.965379][ C0] ? default_idle_call+0x2a/0xc0
[ 15.967867][ C0] ? cpuidle_idle_call+0x122/0x180
[ 15.968680][ C0] ? do_idle+0x79/0xc0
[ 15.969357][ C0] ? cpu_startup_entry+0x25/0x40
[ 15.970106][ C0] ? rest_init+0x96/0xc0
[ 15.970770][ C0] ? arch_call_rest_init+0xd/0x80
[ 15.971505][ C0] ? start_kernel+0x347/0x480
[ 15.972209][ C0] ? early_idt_handler_common+0x44/0x44
[ 15.972969][ C0] ? i386_start_kernel+0x48/0x80
[ 15.973678][ C0] ? startup_32_smp+0x156/0x158
[ 15.974397][ C0] Modules linked in: intel_rapl_msr(E) intel_rapl_common(E) ata_generic(E) ppdev(E) crc32_pclmul(E) crc32c_intel(E) aesni_intel(E) ipmi_devintf(
E) ipmi_msghandler(E) crypto_simd(E) ata_piix(E) cryptd(E) rapl(E) i2c_piix4(E) psmouse(E) evdev(E) serio_raw(E) bochs(E) drm_vram_helper(E) drm_kms_helper(E) drm_tt
m_helper(E) ttm(E) libata(E) parport_pc(E) floppy(E) parport(E) qemu_fw_cfg(E) button(E) drm(E) configfs(E) fuse(E) autofs4(E)
[ 15.978905][ C0] CR2: 0000000000000005
[ 15.979621][ C0] ---[ end trace 0000000000000000 ]---
[ 15.980419][ C0] EIP: free_pcppages_bulk+0x7d/0x200
[ 15.981222][ C0] Code: 8d 34 c6 89 75 e4 83 f8 0c 0f 84 ee 00 00 00 ba ab aa aa aa f7 e2 b8 01 00 00 00 89 d1 d1 e9 d3 e0 89 45 e0 8b 45 e4 8b 50 04 <8b> 72 04
8d 5a fc 83 ee 04 39 c2 0f 84 0a 01 00 00 89 4d e8 eb 28
[ 15.983663][ C0] EAX: e4c7520c EBX: e4c9f510 ECX: 55555555 EDX: 00000001
[ 15.984705][ C0] ESI: e4c7520c EDI: e4c75200 EBP: c1819d98 ESP: c1819d60
[ 15.985738][ C0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210006
[ 15.986822][ C0] CR0: 80050033 CR2: 00000005 CR3: 2ca6a000 CR4: 000406f0
[ 15.987832][ C0] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 15.988839][ C0] DR6: fffe0ff0 DR7: 00000400
[ 15.989679][ C0] Kernel panic - not syncing: Fatal exception in interrupt
[ 15.996118][ C0] Kernel Offset: disabled
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230824/202308241221.cc5ac84a-oliver.sang@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
