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bh=odh1FEY3gfv9Oaa4XSlvByT1MReTjq4xb466aItSTqw=; b=yyj0MRIucP9/GsTuQl6DbUEaR/mPM3mugrU/sE5pKYrxGfUZk++5IjCNXo5dxsYYVo OQyixL9C2+cAgyYV0QwAibtjde02en75D4UGsgnZsSAddEB7CtHzHntqGrjYrt2A4zja BJvlQj8tpPhl8tpqzFrTgjclHMcnlhT95gq7fBjKHzgcBVcfpF/sdk0klWp2zFz7GoRW gc29HVYszcONb599jYv//jk1Rm1kA1lOFVrX9uVwTEo9VM9ztWUXiQrw/oQf+6PB/6Wh 9TUVZJTMM24uE1bCBpSRetkxBtR8qZu/6L4FAcWCvOzH+erHRkYXdYbQtYmRClZQb0ft XUiA== X-Forwarded-Encrypted: i=1; AKwUvBxv2n+6V35p/E9gGfppllDKrHGcNOWHhHdg84O1PRVneyITjC/8aCEkK2TdupQtwVoYJ3icv+n8Kw==@kvack.org X-Gm-Message-State: AFq9FYKFYBe4roi2A3oHFThSqBiQhcn2aa4YKz95hfaCbSoJmsgmXsef qUrCzoBUNS3QrUEJhzPn6ckcuExoPO57AUphl3GUuRQCw9HsJG1kfumj4VDJDPl1a3cy4b9F8GL 0dRU+wWSAh26USMb0YbiNXuTQlB72czeiXm6pbsqGNn0H/DdJECrn2I/IKKQ= X-Archived-By: MIME-Version: 1.0 X-Received: by 2002:a05:6808:f12:b0:4b3:7b31:8df0 with SMTP id 5614622812f47-56382c83592mr462249b6e.10.1793142622081; Tue, 27 Oct 2026 16:10:22 -0700 (PDT) Date: Tue, 27 Oct 2026 16:10:22 -0700 In-Reply-To: <20261027113813.1332096-1-trintaeoitogc@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ae12f5e.985912ea.1e5798.00c8.GAE@google.com> Subject: [syzbot ci] Re: mm: clear pmd in pmdp_invalidate() From: syzbot ci To: akpm@linux-foundation.org, david@kernel.org, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mhocko@suse.com, rppt@kernel.org, surenb@google.com, trintaeoitogc@gmail.com, vbabka@kernel.org Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 075C940005 X-Stat-Signature: b56xwf853w7xu7q97ow7zcxwj8fg7nxq X-Rspamd-Server: rspam04 X-Spam-Status: No, score=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_PASS,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Rspam-User: X-HE-Tag: 1793142622-456154 X-HE-Meta: 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 JxPTL7x2 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 61x2BK9x UxSIgMVCPdo5CuqcdQcoUw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 syzbot ci has tested the following series [v1] mm: clear pmd in pmdp_invalidate() https://lore.kernel.org/all/20261027113813.1332096-1-trintaeoitogc@gmail.com * [PATCH] mm: clear pmd in pmdp_invalidate() and found the following issue: kernel BUG in page_table_check_clear Full report is available here: https://ci.syzbot.org/series/ea6c690b-0dbf-4e3e-8367-2b5092d2878d *** kernel BUG in page_table_check_clear tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: 01146870c415f6ff70a469fb7ceb962a3f2c8c52 arch: amd64 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/b4be77d2-e026-48a2-b906-ba8967ba2d37/config syz repro: https://ci.syzbot.org/findings/8fa94c36-acda-4fe5-a760-1dea60977f77/syz_repro ------------[ cut here ]------------ kernel BUG at mm/page_table_check.c:83! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 5817 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:page_table_check_clear+0x4ec/0x500 mm/page_table_check.c:83 Code: 89 e7 e8 f7 1a f4 ff e9 bd fb ff ff e8 4d 37 83 ff 90 0f 0b e8 45 37 83 ff 90 0f 0b e8 3d 37 83 ff 90 0f 0b e8 35 37 83 ff 90 <0f> 0b e8 2d 37 83 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 RSP: 0018:ffffc900035eed50 EFLAGS: 00010293 RAX: ffffffff8244dd9b RBX: 0000000000000200 RCX: ffff88810d88bc00 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffff888104dea000 R08: ffff888104dea04b R09: 1ffff110209bd409 R10: dffffc0000000000 R11: ffffed10209bd40a R12: 00000000ffffffff R13: 0000000000000001 R14: ffff888104dea048 R15: 0000000000116200 FS: 00007f8b11ee36c0(0000) GS:ffff88818c4c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000140 CR3: 0000000112c36000 CR4: 00000000000006f0 Call Trace: page_table_check_pmd_clear include/linux/page_table_check.h:64 [inline] pmdp_invalidate+0x2fc/0x310 mm/pgtable-generic.c:206 __split_huge_pmd_locked mm/huge_memory.c:3323 [inline] split_huge_pmd_locked+0x100a/0x2e50 mm/huge_memory.c:3476 __split_huge_pmd+0x202/0x2e0 mm/huge_memory.c:3490 zap_pmd_range mm/memory.c:2136 [inline] zap_pud_range mm/memory.c:2179 [inline] zap_p4d_range mm/memory.c:2200 [inline] __zap_vma_range+0xb85/0x4f80 mm/memory.c:2240 zap_vma_range_batched+0x3e0/0x5b0 mm/memory.c:2351 madvise_dontneed_single_vma mm/madvise.c:868 [inline] madvise_dontneed_free mm/madvise.c:959 [inline] madvise_vma_behavior+0x252b/0x41d0 mm/madvise.c:1370 madvise_walk_vmas+0x924/0xb00 mm/madvise.c:1687 madvise_do_behavior+0x385/0x540 mm/madvise.c:1916 do_madvise+0x327/0x3a0 mm/madvise.c:2014 __do_sys_madvise mm/madvise.c:2023 [inline] __se_sys_madvise mm/madvise.c:2021 [inline] __x64_sys_madvise+0xa6/0xc0 mm/madvise.c:2021 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8b10f9f559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8b11ee3028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007f8b11225fa0 RCX: 00007f8b10f9f559 RDX: 0000000000000004 RSI: 0000000000003000 RDI: 000020000015e000 RBP: 00007f8b11036b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8b11226038 R14: 00007f8b11225fa0 R15: 00007fff02a6aba8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:page_table_check_clear+0x4ec/0x500 mm/page_table_check.c:83 Code: 89 e7 e8 f7 1a f4 ff e9 bd fb ff ff e8 4d 37 83 ff 90 0f 0b e8 45 37 83 ff 90 0f 0b e8 3d 37 83 ff 90 0f 0b e8 35 37 83 ff 90 <0f> 0b e8 2d 37 83 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 RSP: 0018:ffffc900035eed50 EFLAGS: 00010293 RAX: ffffffff8244dd9b RBX: 0000000000000200 RCX: ffff88810d88bc00 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: ffff888104dea000 R08: ffff888104dea04b R09: 1ffff110209bd409 R10: dffffc0000000000 R11: ffffed10209bd40a R12: 00000000ffffffff R13: 0000000000000001 R14: ffff888104dea048 R15: 0000000000116200 FS: 00007f8b11ee36c0(0000) GS:ffff88818c4c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000140 CR3: 0000000112c36000 CR4: 00000000000006f0 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported.