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Mon, 24 Nov 2025 02:25:25 -0800 (PST) MIME-Version: 1.0 References: <69229bf5.a70a0220.2ea503.006d.GAE@google.com> <744134e8-387e-4429-b878-87161a45113f@lucifer.local> In-Reply-To: <744134e8-387e-4429-b878-87161a45113f@lucifer.local> From: Aleksandr Nogikh Date: Mon, 24 Nov 2025 11:25:14 +0100 X-Gm-Features: AWmQ_bmwaRt-mF5ltu5IuMzYeAZdEdJO9bG_QkA3weUaPun_Mt3iu8vxulHWaBQ Message-ID: Subject: Re: [syzbot] [mm?] WARNING in vma_modify (2) To: Lorenzo Stoakes Cc: syzbot , linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 8AE9C40009 X-Stat-Signature: ctj5xodzcdmxsfueqt5ki8jd67xjr615 X-Rspam-User: X-HE-Tag: 1763979926-611202 X-HE-Meta: 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 YY3FKVDL 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 SH4yJaOa 4lg6Ubr/Smokp1JUf0Mg3QL+X04Vzpmb2dnANHhR2X4Rh3QwIq/gXq5DEkhcynV00l9K+eTsq9CsaiUHqh/28Qt2VWTSIf5JY0XiO+EbQJ5/UMyCi8HlwTEyH6/wwrkh X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Lorenzo, Thanks for taking a closer look! On Mon, Nov 24, 2025 at 10:53=E2=80=AFAM 'Lorenzo Stoakes' via syzkaller-bu= gs wrote: > > On Sat, Nov 22, 2025 at 09:30:29PM -0800, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > Hi, thanks for the report! > > > > > HEAD commit: fe4d0dea039f Add linux-next specific files for 20251119 > > Hm this is quite far behind! > > This is a known issue that has already been fixed in linux-next. Could you please point to the patch series that introduced the original iss= ue? I'd love to debug why https://ci.syzbot.org/ missed it. > > It'll all be rebased so no syz command is going to be too useful here I t= hink! Yes, we can only close it as invalid so that the report doesn't stay open: #syz invalid --=20 Aleksandr > > Cheers, Lorenzo > > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=3D1011b212580= 000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=3D151bfd5098f= 42253 > > dashboard link: https://syzkaller.appspot.com/bug?extid=3D3e03c90442966= 0114599 > > compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7= 976-1~exp1~20250708183702.136), Debian LLD 20.1.8 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D12ed96585= 80000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D11b0f884580= 000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/8ba50fe0f8f3/d= isk-fe4d0dea.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/b6fd6a81a075/vmli= nux-fe4d0dea.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/78cb38ef15c3= /bzImage-fe4d0dea.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the co= mmit: > > Reported-by: syzbot+3e03c904429660114599@syzkaller.appspotmail.com > > > > 7f6714fc0000-7f6715b1dfff: ffff8880734eea00 > > 7f6715b1e000-7f6715b8dfff: 0000000000000000 > > 7f6715b8e000-7f6715b91fff: ffff8880734ee8c0 > > 7f6715b92000-7f6715b93fff: ffff8880734ee780 > > 7f6715b94000-7f6715b95fff: ffff8880734ee640 > > 7f6715b96000-7ffdfe1f0fff: 0000000000000000 > > 7ffdfe1f1000-7ffdfe211fff: ffff8880734ee500 > > 7ffdfe212000-ffffffffffffffff: 0000000000000000 > > ------------[ cut here ]------------ > > WARNING: mm/vma.c:818 at vma_merge_existing_range mm/vma.c:818 [inline]= , CPU#1: syz.0.17/6004 > > WARNING: mm/vma.c:818 at vma_modify+0x1614/0x1a70 mm/vma.c:1611, CPU#1:= syz.0.17/6004 > > Modules linked in: > > CPU: 1 UID: 0 PID: 6004 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT= (full) > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS= Google 10/25/2025 > > RIP: 0010:vma_merge_existing_range mm/vma.c:818 [inline] > > RIP: 0010:vma_modify+0x1614/0x1a70 mm/vma.c:1611 > > Code: 0b 90 e9 c4 ec ff ff e8 ea e5 a8 ff 90 0f 0b 90 e9 04 ec ff ff e8= dc e5 a8 ff 4c 89 f7 48 c7 c6 60 e6 96 8b e8 5d 85 f2 ff 90 <0f> 0b 90 e9 = 6a ec ff ff e8 bf e5 a8 ff e9 59 ed ff ff e8 b5 e5 a8 > > RSP: 0018:ffffc90002ee7ae8 EFLAGS: 00010282 > > RAX: ffffffff8b5d946d RBX: 0000200000ffe000 RCX: ffff8880326c3d00 > > RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff > > RBP: ffffc90002ee7c20 R08: ffffc90002ee7667 R09: 1ffff920005dcecc > > R10: dffffc0000000000 R11: fffff520005dcecd R12: 0000200000ffe000 > > R13: dffffc0000000000 R14: ffffc90002ee7c00 R15: 1ffff920005dcf84 > > FS: 0000555555b5c500(0000) GS:ffff888125b72000(0000) knlGS:00000000000= 00000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007f1609b292d0 CR3: 0000000073528000 CR4: 00000000003526f0 > > Call Trace: > > > > vma_modify_flags+0x1e8/0x230 mm/vma.c:1652 > > mlock_fixup+0x24b/0x3b0 mm/mlock.c:481 > > apply_vma_lock_flags+0x285/0x390 mm/mlock.c:554 > > __do_sys_munlock mm/mlock.c:691 [inline] > > __se_sys_munlock+0x150/0x270 mm/mlock.c:680 > > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > > do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > RIP: 0033:0x7f6714d8f749 > > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89= f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 = ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007ffdfe210298 EFLAGS: 00000246 ORIG_RAX: 0000000000000096 > > RAX: ffffffffffffffda RBX: 00007f6714fe5fa0 RCX: 00007f6714d8f749 > > RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000200000ffd000 > > RBP: 00007f6714e13f91 R08: 0000000000000000 R09: 0000000000000000 > > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > > R13: 00007f6714fe5fa0 R14: 00007f6714fe5fa0 R15: 0000000000000002 > > > > > > > > --- > > This report is generated by a bot. It may contain errors. > > See https://goo.gl/tpsmEJ for more information about syzbot. > > syzbot engineers can be reached at syzkaller@googlegroups.com. > > > > syzbot will keep track of this issue. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > > > If the report is already addressed, let syzbot know by replying with: > > #syz fix: exact-commit-title > > > > If you want syzbot to run the reproducer, reply with: > > #syz test: git://repo/address.git branch-or-commit-hash > > If you attach or paste a git patch, syzbot will apply it before testing= . > > > > If you want to overwrite report's subsystems, reply with: > > #syz set subsystems: new-subsystem > > (See the list of subsystem names on the web dashboard) > > > > If the report is a duplicate of another one, reply with: > > #syz dup: exact-subject-of-another-report > > > > If you want to undo deduplication, reply with: > > #syz undup >