Re: [rcu:rcu/next] BUILD SUCCESS WITH WARNING f81f6edb74f27c5c8917d20a2bc128aca39aae11

From: Paul E. McKenney
Date: Wed Jan 13 2021 - 23:31:37 EST

Next message: Hugh Dickins: "Re: madvise(MADV_REMOVE) deadlocks on shmem THP"
Previous message: kernel test robot: "hppa64-linux-ld: kernel/trace/ftrace.o(.text+0x6c58): cannot reach strlcpy"
In reply to: Rong Chen: "Re: [rcu:rcu/next] BUILD SUCCESS WITH WARNING f81f6edb74f27c5c8917d20a2bc128aca39aae11"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Thu, Jan 14, 2021 at 09:38:47AM +0800, Rong Chen wrote:
>
>
> On 1/13/21 11:14 PM, Paul E. McKenney wrote:
> > On Wed, Jan 13, 2021 at 08:24:24PM +0800, kernel test robot wrote:
> > > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
> > > branch HEAD: f81f6edb74f27c5c8917d20a2bc128aca39aae11 rcu: Remove spurious instrumentation_end() in rcu_nmi_enter()
> > >
> > > Warning ids grouped by kconfigs:
> > >
> > > gcc_recent_errors
> > > |-- h8300-randconfig-c003-20210112
> > > | `-- kernel-rcu-rcutorture.c:WARNING-kmalloc-is-used-to-allocate-this-memory-at-line
> > > |-- i386-randconfig-c001-20210112
> > > | `-- kernel-rcu-rcutorture.c:WARNING-kmalloc-is-used-to-allocate-this-memory-at-line
> > > `-- powerpc-randconfig-c004-20210112
> > > `-- kernel-rcu-rcutorture.c:WARNING-kmalloc-is-used-to-allocate-this-memory-at-line
> > OK, I will bite... At which line?
> >
> > Thanx, Paul
>
> Hi Paul,
>
> It's a coccinelle warning, it seems Julia Lawall didn't forward it to you,
> it maybe not a real problem.
>
> https://lists.01.org/hyperkitty/list/kbuild@xxxxxxxxxxxx/message/ZN45D2QHCG5W4KMOGVBLUCUOKH32LFHE/

Indeed. The kmalloc() at line 1887 is freed via kfree() at line 1893,
then 1894 does a vmalloc() that is vfree()ed at line 1900. It looks like
the script paired 1887 with 1900, losing lines 1893 and 1894. ;-)

Thanx, Paul

> Best Regards,
> Rong Chen
>
> >
> > > elapsed time: 722m
> > >
> > > configs tested: 164
> > > configs skipped: 2
> > >
> > > gcc tested configs:
> > > arm defconfig
> > > arm64 allyesconfig
> > > arm64 defconfig
> > > arm allyesconfig
> > > arm allmodconfig
> > > arm shannon_defconfig
> > > powerpc maple_defconfig
> > > arm zx_defconfig
> > > mips e55_defconfig
> > > arm spear13xx_defconfig
> > > arm colibri_pxa300_defconfig
> > > sh se7206_defconfig
> > > arc nsimosci_hs_smp_defconfig
> > > powerpc lite5200b_defconfig
> > > sh sh7785lcr_32bit_defconfig
> > > mips lemote2f_defconfig
> > > sh rts7751r2d1_defconfig
> > > m68k m5272c3_defconfig
> > > sh migor_defconfig
> > > powerpc icon_defconfig
> > > sh alldefconfig
> > > mips cu1000-neo_defconfig
> > > arm cns3420vb_defconfig
> > > mips decstation_r4k_defconfig
> > > arm corgi_defconfig
> > > arm eseries_pxa_defconfig
> > > ia64 tiger_defconfig
> > > powerpc pasemi_defconfig
> > > mips bigsur_defconfig
> > > mips rbtx49xx_defconfig
> > > c6x alldefconfig
> > > mips decstation_defconfig
> > > sh sh7770_generic_defconfig
> > > arm hisi_defconfig
> > > c6x evmc6472_defconfig
> > > microblaze defconfig
> > > xtensa cadence_csp_defconfig
> > > powerpc mvme5100_defconfig
> > > m68k amcore_defconfig
> > > mips bcm47xx_defconfig
> > > mips workpad_defconfig
> > > h8300 edosk2674_defconfig
> > > powerpc mpc8313_rdb_defconfig
> > > mips xway_defconfig
> > > arc tb10x_defconfig
> > > sh se7721_defconfig
> > > arm axm55xx_defconfig
> > > m68k q40_defconfig
> > > arm mini2440_defconfig
> > > powerpc tqm8560_defconfig
> > > sh ecovec24_defconfig
> > > c6x evmc6457_defconfig
> > > arm mvebu_v7_defconfig
> > > mips pistachio_defconfig
> > > m68k multi_defconfig
> > > s390 zfcpdump_defconfig
> > > xtensa smp_lx200_defconfig
> > > h8300 h8300h-sim_defconfig
> > > arm multi_v4t_defconfig
> > > arm davinci_all_defconfig
> > > sh r7780mp_defconfig
> > > arm keystone_defconfig
> > > ia64 zx1_defconfig
> > > mips maltaaprp_defconfig
> > > sh se7724_defconfig
> > > sh urquell_defconfig
> > > sparc alldefconfig
> > > arm multi_v5_defconfig
> > > powerpc pmac32_defconfig
> > > powerpc ksi8560_defconfig
> > > powerpc amigaone_defconfig
> > > arc haps_hs_smp_defconfig
> > > csky defconfig
> > > um kunit_defconfig
> > > powerpc mpc832x_rdb_defconfig
> > > powerpc mgcoge_defconfig
> > > ia64 generic_defconfig
> > > powerpc bamboo_defconfig
> > > arm pxa255-idp_defconfig
> > > sh se7705_defconfig
> > > parisc defconfig
> > > m68k m5407c3_defconfig
> > > m68k atari_defconfig
> > > powerpc mpc832x_mds_defconfig
> > > powerpc fsp2_defconfig
> > > m68k m5275evb_defconfig
> > > powerpc ppc44x_defconfig
> > > arm qcom_defconfig
> > > sh ecovec24-romimage_defconfig
> > > arm tango4_defconfig
> > > mips ath25_defconfig
> > > sh sh2007_defconfig
> > > arm socfpga_defconfig
> > > m68k m5249evb_defconfig
> > > mips decstation_64_defconfig
> > > ia64 allmodconfig
> > > ia64 defconfig
> > > ia64 allyesconfig
> > > m68k allmodconfig
> > > m68k defconfig
> > > m68k allyesconfig
> > > nios2 defconfig
> > > arc allyesconfig
> > > nds32 allnoconfig
> > > c6x allyesconfig
> > > nds32 defconfig
> > > nios2 allyesconfig
> > > alpha defconfig
> > > alpha allyesconfig
> > > xtensa allyesconfig
> > > h8300 allyesconfig
> > > arc defconfig
> > > sh allmodconfig
> > > s390 allyesconfig
> > > parisc allyesconfig
> > > s390 defconfig
> > > i386 allyesconfig
> > > sparc allyesconfig
> > > sparc defconfig
> > > i386 tinyconfig
> > > i386 defconfig
> > > mips allyesconfig
> > > mips allmodconfig
> > > powerpc allyesconfig
> > > powerpc allmodconfig
> > > powerpc allnoconfig
> > > x86_64 randconfig-a006-20210113
> > > x86_64 randconfig-a004-20210113
> > > x86_64 randconfig-a001-20210113
> > > x86_64 randconfig-a005-20210113
> > > x86_64 randconfig-a003-20210113
> > > x86_64 randconfig-a002-20210113
> > > i386 randconfig-a002-20210113
> > > i386 randconfig-a005-20210113
> > > i386 randconfig-a006-20210113
> > > i386 randconfig-a003-20210113
> > > i386 randconfig-a001-20210113
> > > i386 randconfig-a004-20210113
> > > i386 randconfig-a012-20210113
> > > i386 randconfig-a011-20210113
> > > i386 randconfig-a016-20210113
> > > i386 randconfig-a013-20210113
> > > i386 randconfig-a015-20210113
> > > i386 randconfig-a014-20210113
> > > riscv nommu_k210_defconfig
> > > riscv allyesconfig
> > > riscv nommu_virt_defconfig
> > > riscv allnoconfig
> > > riscv defconfig
> > > riscv rv32_defconfig
> > > riscv allmodconfig
> > > x86_64 rhel
> > > x86_64 allyesconfig
> > > x86_64 rhel-7.6-kselftests
> > > x86_64 defconfig
> > > x86_64 rhel-8.3
> > > x86_64 rhel-8.3-kbuiltin
> > > x86_64 kexec
> > >
> > > clang tested configs:
> > > x86_64 randconfig-a015-20210113
> > > x86_64 randconfig-a012-20210113
> > > x86_64 randconfig-a013-20210113
> > > x86_64 randconfig-a016-20210113
> > > x86_64 randconfig-a014-20210113
> > > x86_64 randconfig-a011-20210113
> > >
> > > ---
> > > 0-DAY CI Kernel Test Service, Intel Corporation
> > > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
>

Next message: Hugh Dickins: "Re: madvise(MADV_REMOVE) deadlocks on shmem THP"
Previous message: kernel test robot: "hppa64-linux-ld: kernel/trace/ftrace.o(.text+0x6c58): cannot reach strlcpy"
In reply to: Rong Chen: "Re: [rcu:rcu/next] BUILD SUCCESS WITH WARNING f81f6edb74f27c5c8917d20a2bc128aca39aae11"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]