From: Philip Li <philip.li@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kernel test robot <lkp@intel.com>,
David Hildenbrand <david@kernel.org>,
Linux Memory Management List <linux-mm@kvack.org>,
<mm-commits@vger.kernel.org>,
Suren Baghdasaryan <surenb@google.com>
Subject: Re: [akpm-mm:mm-new] BUILD REGRESSION 763ad0211c7b587344f03bc4d1299810aeb736f4
Date: Mon, 5 Oct 2026 15:40:49 +0800 [thread overview]
Message-ID: <asNUgRwsmaGWdsGf@rli9-mobl> (raw)
In-Reply-To: <20261003143826.be180aae972aa1e6a24956e7@linux-foundation.org>
On Sat, Oct 03, 2026 at 02:38:26PM -0700, Andrew Morton wrote:
> On Sun, 04 Oct 2026 04:27:12 +0800 kernel test robot <lkp@intel.com> wrote:
>
> > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> > branch HEAD: 763ad0211c7b587344f03bc4d1299810aeb736f4 mm/swap, PM: hibernate: atomically replace hibernation pin
> >
> > Unverified Error/Warning (likely false positive, kindly check if interested):
> >
> > https://lore.kernel.org/oe-kbuild/202609121707.Hya5cxAX-lkp@intel.com
> > https://lore.kernel.org/oe-kbuild/202609151628.hydefVEV-lkp@intel.com
> >
> > drivers/scsi/sg.c:294:1-17: ERROR: sg_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.
> > fs/proc/task_mmu.c:1427 show_smaps_rollup() warn: 'vma' is an error pointer or valid
>
> It would help if these reports told us which tool emitted the warning.
Sorry for confusion, I will enhance the report to show the tool clearly
and show better connection between the report url and issue.
So far, it is not that direct, which need open the report link for the tool
chain
- it is smatch for 202609121707.Hya5cxAX-lkp@intel.com report as you
mentioned below ""
- and it is cocci for another 202609151628.hydefVEV-lkp@intel.com report
regarding "drivers/scsi/sg.c:294:1-17: ERROR: sg_fops: .read() can deadlock .write()"
BTW: both reports are unverified yet, which could be false positive.
Thanks
> This one was smatch.
>
>
> "proc/task_mmu: read proc/pid/smaps_rollup under per-vma lock" has:
>
> vma_iter_init(&priv->iter, mm, 0);
> vma = proc_get_vma(m, &pos);
> if (unlikely(!vma))
> goto empty_set;
>
> if (!IS_ERR(vma))
> vma_start = vma->vm_start;
>
> while (vma) {
> if (IS_ERR(vma)) {
> ret = PTR_ERR(vma);
> goto out_unlock;
> }
>
> The code is funky-looking but I think it correctly handles all three
> cases: NULL, IS_ERR, valid vma*.
>
>
> > Error/Warning ids grouped by kconfigs:
> >
> > recent_errors
> > |-- alpha-randconfig-r2107-20261003
> > | `-- drivers-scsi-sg.c:ERROR:sg_fops:read()-can-deadlock-write()-change-nonseekable_open-stream_open-to-fix.
> > |-- alpha-randconfig-r2200-20261003
> > | `-- fs-proc-task_mmu.c-show_smaps_rollup()-warn:vma-is-an-error-pointer-or-valid
> > |-- i386-randconfig-2103-20261003
> > | `-- drivers-scsi-sg.c:ERROR:sg_fops:read()-can-deadlock-write()-change-nonseekable_open-stream_open-to-fix.
> > |-- nios2-randconfig-r2202-20261003
> > | `-- fs-proc-task_mmu.c-show_smaps_rollup()-warn:vma-is-an-error-pointer-or-valid
> > |-- powerpc-randconfig-r2201-20261003
> > | `-- fs-proc-task_mmu.c-show_smaps_rollup()-warn:vma-is-an-error-pointer-or-valid
> > |-- powerpc64-randconfig-r2101-20261003
> > | `-- drivers-scsi-sg.c:ERROR:sg_fops:read()-can-deadlock-write()-change-nonseekable_open-stream_open-to-fix.
> > |-- x86_64-randconfig-2100-20261003
> > | `-- drivers-scsi-sg.c:ERROR:sg_fops:read()-can-deadlock-write()-change-nonseekable_open-stream_open-to-fix.
> > `-- x86_64-randconfig-2200-20261003
> > `-- fs-proc-task_mmu.c-show_smaps_rollup()-warn:vma-is-an-error-pointer-or-valid
> >
> > elapsed time: 882m
> >
> > configs tested: 200
> > configs skipped: 13
> >
> > tested configs:
> > alpha allnoconfig gcc-16.1.0
> > alpha allyesconfig gcc-16.1.0
> > alpha defconfig gcc-16.1.0
> > alpha defconfig gcc-16.1.0
> > alpha randconfig-r2105-20261003 gcc-8.5.0 cocci
> > alpha randconfig-r2107-20261003 gcc-8.5.0 cocci
> > alpha randconfig-r2200-20261003 gcc-8.5.0 smatch
> > arc allmodconfig gcc-16.1.0
> > arc allnoconfig gcc-16.1.0
> > arc allyesconfig gcc-16.1.0
> > arc axs103_smp_defconfig gcc-16.1.0
> > arc defconfig gcc-16.1.0
> > arc randconfig-1000-20261003 gcc-13.4.0
> > arc randconfig-1001-20261003 gcc-11.5.0
> > arc randconfig-r2100-20261003 gcc-8.5.0 cocci
> > arm allnoconfig clang-17
> > arm at91_dt_defconfig clang-17
> > arm defconfig clang-24
> > arm randconfig-1000-20261003 clang-17
> > arm randconfig-1001-20261003 clang-24
> > arm randconfig-1002-20261003 gcc-11.5.0
> > arm randconfig-1003-20261003 gcc-8.5.0
> > arm wpcm450_defconfig gcc-16.1.0
> > arm64 allnoconfig gcc-16.1.0
> > arm64 defconfig gcc-16.1.0
> > arm64 randconfig-1000-20261003 gcc-10.5.0
> > arm64 randconfig-1001-20261003 clang-17
> > arm64 randconfig-1002-20261003 clang-17
> > arm64 randconfig-1003-20261003 gcc-8.5.0
> > arm64 randconfig-r2106-20261003 clang-24 cocci
> > csky allmodconfig gcc-16.1.0
> > csky allnoconfig gcc-16.1.0
> > csky defconfig gcc-16.1.0
> > csky randconfig-1000-20261003 gcc-9.5.0
> > csky randconfig-1001-20261003 gcc-11.5.0
> > hexagon allmodconfig clang-24
> > hexagon allnoconfig clang-24
> > hexagon defconfig clang-24
> > hexagon randconfig-1000-20261003 clang-17
> > hexagon randconfig-1001-20261003 clang-24
> > i386 allmodconfig gcc-14
> > i386 allnoconfig gcc-14
> > i386 buildonly-randconfig-1000-20261003 gcc-14
> > i386 buildonly-randconfig-1001-20261003 clang-22
> > i386 buildonly-randconfig-1002-20261003 clang-22
> > i386 buildonly-randconfig-1003-20261003 clang-22
> > i386 buildonly-randconfig-1004-20261003 clang-22
> > i386 buildonly-randconfig-1005-20261003 clang-22
> > i386 defconfig clang-22
> > i386 randconfig-1000-20261003 clang-22
> > i386 randconfig-1001-20261003 clang-22
> > i386 randconfig-1002-20261003 clang-22
> > i386 randconfig-1003-20261003 clang-22
> > i386 randconfig-1004-20261003 clang-22
> > i386 randconfig-1005-20261003 clang-22
> > i386 randconfig-1006-20261003 gcc-14
> > i386 randconfig-2100-20261003 gcc-14 cocci
> > i386 randconfig-2101-20261003 clang-22 cocci
> > i386 randconfig-2102-20261003 gcc-14 cocci
> > i386 randconfig-2103-20261003 clang-22 cocci
> > i386 randconfig-2200-20261003 gcc-14 smatch
> > i386 randconfig-2300-20261003 clang-22 sparse
> > i386 randconfig-2301-20261003 gcc-14 sparse
> > i386 randconfig-2302-20261003 gcc-14 sparse
> > loongarch allnoconfig clang-20
> > loongarch defconfig clang-24
> > loongarch randconfig-1000-20261003 gcc-14.3.0
> > loongarch randconfig-1001-20261003 gcc-16.1.0
> > loongarch randconfig-r2304-20261003 gcc-13.4.0 sparse
> > m68k allmodconfig gcc-16.1.0
> > m68k allnoconfig gcc-16.1.0
> > m68k allyesconfig gcc-16.1.0
> > m68k defconfig gcc-16.1.0
> > m68k stmark2_defconfig gcc-16.1.0
> > microblaze allnoconfig gcc-16.1.0
> > microblaze allyesconfig gcc-16.1.0
> > microblaze defconfig gcc-16.1.0
> > mips allnoconfig gcc-16.1.0
> > mips allyesconfig gcc-16.1.0
> > mips db1xxx_defconfig clang-24
> > mips randconfig-r2102-20261003 gcc-13.4.0 cocci
> > mips randconfig-r2305-20261003 gcc-8.5.0 sparse
> > mips rbtx49xx_defconfig gcc-16.1.0
> > nios2 allmodconfig gcc-11.5.0
> > nios2 allnoconfig gcc-11.5.0
> > nios2 defconfig gcc-11.5.0
> > nios2 randconfig-1000-20261003 gcc-9.5.0
> > nios2 randconfig-1001-20261003 gcc-11.5.0
> > nios2 randconfig-r2202-20261003 gcc-8.5.0 smatch
> > nios2 randconfig-r2307-20261003 gcc-11.5.0 sparse
> > openrisc allmodconfig gcc-16.1.0
> > openrisc allnoconfig gcc-16.1.0
> > openrisc defconfig gcc-16.1.0
> > parisc allmodconfig gcc-16.1.0
> > parisc allnoconfig gcc-16.1.0
> > parisc allyesconfig gcc-16.1.0
> > parisc defconfig gcc-16.1.0
> > parisc randconfig-1000-20261003 gcc-11.5.0
> > parisc randconfig-1001-20261003 gcc-8.5.0
> > parisc randconfig-r2103-20261003 gcc-8.5.0 cocci
> > parisc randconfig-r2306-20261003 gcc-9.5.0 sparse
> > parisc64 defconfig gcc-16.1.0
> > powerpc allnoconfig gcc-16.1.0
> > powerpc randconfig-1000-20261003 gcc-12.5.0
> > powerpc randconfig-1001-20261003 gcc-8.5.0
> > powerpc randconfig-r2201-20261003 clang-17 smatch
> > powerpc randconfig-r2309-20261003 clang-21 sparse
> > powerpc64 randconfig-1000-20261003 clang-24
> > powerpc64 randconfig-1001-20261003 clang-22
> > powerpc64 randconfig-r2101-20261003 gcc-13.4.0 cocci
> > riscv allnoconfig gcc-16.1.0
> > riscv defconfig clang-24
> > riscv randconfig-1000-20261003 clang-24
> > riscv randconfig-1001-20261003 clang-24
> > riscv randconfig-2000-20261003 clang-17
> > riscv randconfig-2001-20261003 gcc-9.5.0
> > riscv randconfig-r2308-20261003 gcc-15.2.0 sparse
> > s390 allmodconfig clang-24
> > s390 allnoconfig clang-24
> > s390 defconfig clang-18
> > s390 randconfig-1000-20261003 gcc-12.5.0
> > s390 randconfig-1001-20261003 clang-24
> > s390 randconfig-2000-20261003 clang-24
> > s390 randconfig-2001-20261003 gcc-13.4.0
> > s390 randconfig-r2104-20261003 clang-17 cocci
> > sh allmodconfig gcc-16.1.0
> > sh allnoconfig gcc-16.1.0
> > sh allyesconfig gcc-16.1.0
> > sh defconfig gcc-16.1.0
> > sh randconfig-1000-20261003 gcc-9.5.0
> > sh randconfig-1001-20261003 gcc-15.2.0
> > sh randconfig-2000-20261003 gcc-16.1.0
> > sh randconfig-2001-20261003 gcc-16.1.0
> > sh randconfig-r2302-20261003 gcc-12.5.0 sparse
> > sparc allnoconfig gcc-16.1.0
> > sparc defconfig gcc-16.1.0
> > sparc randconfig-1000-20261003 gcc-8.5.0
> > sparc randconfig-1001-20261003 gcc-8.5.0
> > sparc randconfig-2000-20261003 gcc-16.1.0
> > sparc randconfig-2001-20261003 gcc-16.1.0
> > sparc64 allmodconfig clang-20
> > sparc64 defconfig clang-24
> > sparc64 randconfig-1000-20261003 gcc-16.1.0
> > sparc64 randconfig-1001-20261003 clang-24
> > sparc64 randconfig-2000-20261003 gcc-8.5.0
> > sparc64 randconfig-2001-20261003 gcc-8.5.0
> > um allmodconfig clang-17
> > um allnoconfig clang-17
> > um allyesconfig gcc-14
> > um defconfig clang-24
> > um i386_defconfig gcc-14
> > um randconfig-1000-20261003 clang-17
> > um randconfig-1001-20261003 clang-22
> > um randconfig-2000-20261003 clang-24
> > um randconfig-2001-20261003 gcc-14
> > um x86_64_defconfig clang-24
> > x86_64 allnoconfig clang-22
> > x86_64 buildonly-randconfig-1000-20261003 clang-22
> > x86_64 buildonly-randconfig-1001-20261003 gcc-14
> > x86_64 buildonly-randconfig-1002-20261003 clang-22
> > x86_64 buildonly-randconfig-1003-20261003 gcc-14
> > x86_64 buildonly-randconfig-1004-20261003 clang-22
> > x86_64 buildonly-randconfig-1005-20261003 gcc-14
> > x86_64 defconfig gcc-14
> > x86_64 randconfig-1000-20261003 clang-22
> > x86_64 randconfig-1001-20261003 clang-22
> > x86_64 randconfig-1002-20261003 clang-22
> > x86_64 randconfig-1003-20261003 gcc-13
> > x86_64 randconfig-1004-20261003 clang-22
> > x86_64 randconfig-1005-20261003 clang-22
> > x86_64 randconfig-1006-20261003 gcc-14
> > x86_64 randconfig-1007-20261003 gcc-14
> > x86_64 randconfig-1008-20261003 gcc-14
> > x86_64 randconfig-1009-20261003 clang-22
> > x86_64 randconfig-1010-20261003 gcc-14
> > x86_64 randconfig-1011-20261003 clang-22
> > x86_64 randconfig-1012-20261003 clang-22
> > x86_64 randconfig-1013-20261003 gcc-12
> > x86_64 randconfig-1014-20261003 gcc-14
> > x86_64 randconfig-1015-20261003 gcc-14
> > x86_64 randconfig-1016-20261003 clang-22
> > x86_64 randconfig-1017-20261003 gcc-14
> > x86_64 randconfig-2100-20261003 clang-22 cocci
> > x86_64 randconfig-2101-20261003 clang-22 cocci
> > x86_64 randconfig-2102-20261003 gcc-14 cocci
> > x86_64 randconfig-2103-20261003 gcc-13 cocci
> > x86_64 randconfig-2200-20261003 gcc-14 smatch
> > x86_64 randconfig-2300-20261003 gcc-14 sparse
> > x86_64 randconfig-2301-20261003 gcc-14 sparse
> > x86_64 randconfig-2302-20261003 clang-22 sparse
> > x86_64 randconfig-r2300-20261003 clang-22 sparse
> > x86_64 randconfig-r2301-20261003 gcc-14 sparse
> > x86_64 rhel-9.4-rust clang-22
> > xtensa allnoconfig gcc-16.1.0
> > xtensa allyesconfig gcc-16.1.0
> > xtensa nommu_kc705_defconfig gcc-16.1.0
> > xtensa randconfig-1000-20261003 gcc-15.2.0
> > xtensa randconfig-1001-20261003 gcc-9.5.0
> > xtensa randconfig-2000-20261003 gcc-8.5.0
> > xtensa randconfig-2001-20261003 gcc-10.5.0
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki
>
prev parent reply other threads:[~2026-10-05 7:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-03 20:27 [akpm-mm:mm-new] BUILD REGRESSION 763ad0211c7b587344f03bc4d1299810aeb736f4 kernel test robot
2026-10-03 21:38 ` Andrew Morton
2026-10-05 7:40 ` Philip Li [this message]
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