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Thu, 13 Nov 2025 08:44:33 -0800 (PST) Date: Thu, 13 Nov 2025 08:44:33 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69160af1.050a0220.3565dc.002d.GAE@google.com> Subject: [syzbot] [mm?] WARNING in __page_table_check_ptes_set (3) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, pasha.tatashin@soleen.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 2F0A4C0016 X-Stat-Signature: qqtnza5dekhoo61umqrc9h3o9cwfwn69 X-Rspamd-Server: rspam02 X-Rspam-User: X-HE-Tag: 1763052274-476450 X-HE-Meta: U2FsdGVkX1/M/D0VzWlZ4DiWuj8ukajo2qG4DNw0ZY+xYKfqI4ygfQrvyVpPwH3W/84TLfcZb8dfwNqJix4Ym96kgpfmgKVFPuhXD/U3SB1JDLeiR0jH/qgegNzOdDp475JYMpyoirG3mnMU2vp2pMCak2IHIDu9kTJWc2lV4TUY8tyBpjmk//CLSi7BofqqXtAN7Cf7Sk50SRtcz8CnFmQ9daML8igroEaHs0pejfNvts95ttOnyum9FmnSNjEn1HdmAtmkZt60sFIQtcoidJR4SJ08hxl6/f4iBPrwp1mmQ3ReWW96LwhFL5yHJcfRndBjEYFits9TN9K+5b29B+jTvrFIJV2H9839J921dES1TldEqDmzSL4iW4MC8r5Fc2+Dwu2jBePvQsd2U+1Ogkwd2Jr2eh+OY/TF2rV3/6fHNQyApSHT2Gqd5/u/BcZuFxDvPL790cZaQ+iVWu/yIi2mAzAcPDZnCGQyhxeUH/lXR2FjSrK4merv+XD0X8cqXp4ExJ+S3r5rmaLUrFCX5wqFA9STW0FuIb7aCr67wXf0LYrWpXFiQDiPSNX9OqecpBiz6S2Y4g4oSFtTAEw+rjyBk8PmL0U9c4vPnOIStrIppD+kf2GV1SZ5USBMD85Yj1Z/PXiCp4qUUvmouNDfVNl/cBj/9guLMFg5DFq9QK6USsvV+V0FhFyB2OavoH3gHuV0hUeezhL3Oyx5gfvvCcpngbi1ybnSDoZf9PWDJyWwkpp0J1W8/Ecb38KC4AtC+0EKEDzPBMOrQ6MzCgWlc/qj1/JZExw+J+Zbp3Nv9sYxaeD1RW7b3N+jdkOuTjtAuCnXQaniTgX6KBDQe3BxrHkc1ii2GrlyOdH1b2mIn6tz+yRNUj8AbcyBx+WgtdWqFmpj2GoRrFxBUJCopcQZI19XP4lHxY7yLwE82eFD6Cw/6U31D+aJrWCb7xVg3BUqKSd/LNHGpsJIi74cHV5 nMBT7yE5 10NtugyAVGwux1fTEL4s5HJn94TzMMW6lSVGCY6LjNZ5seD1fo4i1OCR47fxUiRrKGx0u85bnB+FbFihmt5Qflw240nF0RabslsQd5rfEHI2cZOR1WKUOhOnv8rbbB+fWweHjcJYM5Nt5r+KOmqhM1EIqWfQ7F/pWg1n+Y4/G3x52i87L9bRNWMu4//suf3MiID3NUILE76ETPGmoT+8p5wB7Z8RAUjlJcgZfgXjZQ76ccU+fQsjvljq7011wCN9viBkdGtTCZZPVmXCLsJC+7t1DLroerny3Sd8zKsJ0aeQLVM0K3Sb9UKOgTCUUnMiAL/HuQ9bmNPgIymnqbYYrhvkguxJ63g4BEMqslICZQhj19QhKttxua86n1OyPmIpFQtJuEi02zpSyu4+sRX7RS9pN0vqMNlX8/xPC7l/N/lJ7CIM4IiOt7Q8Cs5Uoh9UFydVgdbzBkA657KGF+DxEnCNTmHwcj0cr+f+uPTbyjG465ihAFBDe03ma+KQla/ZYPBEO5GeVSmId6SMH8kEqjeAmdc8d9Qc9JUaW0BaYnV2RLR0ne802MleOwev/zeDw6jEIgGerCnE2tcb2lbicREcsTpeU+G4JMmkJlPk4k8k/wEWFUlO+/SyuvlUIYVav0lIxA7yCYFuNDQyT2seixNYMMtNZ7vZkYH000wZlzZdCmoulAo+TywrdNSzF0Hc4Ow1Z7dfKFTgbSbNns/tq8lDTPhbujtfXpMnrSFRe5Haa8mvKHRdg54HQX4ESjh4V2am1p2YE1Jwv9McDKEi4RGgFUX2ql6CAqz2798cQA2W/WfFeylVjDhoo7CfeEfR1OmMcE4yKD/+VPru5IKxq+F3GSb9cfZnvjNUFdwoB40LlmLzheJCy6wOWW0N1LjTDx1j4AwrN7ea35LXWMPeoUvw0dNYbPKTekydEsb7rjwGSyIesX9qFY5wnjbP2cOZsIgiljd1HxMx5cg7zotWSnMBLLcPj zuS4ih8G xOEF5eF9S6wKJOjfQaFHfoxQ5cerCGa91UaE6qTs+g/cQJz2XlNJD6KzjZr1qCH28ES9C9MDHyC2Xs3CsWu3dXtVGTpwUX8wx0uDKUle8XZMX3jjdtz4dR5VmIVdAy8wn/LCUELClvjC9kNJLNJeqiZx0wRCkjqnB2AOaOZrbRQz5XF/m2C4HpA8rdnNi/YxL8fC8g6icmURAJqZRrj9YOulC4efCsYm17PHrgnwV4PR6zLdd48kM7We93j84hTr8vTwPjlJb5jI5CNqII0TH95Dj4nAGkytoP2JZe3/zPxNndLGmJi11xOq2Vc7iKYlSEHWUuh+kXUAPzvq3nbjJoR1yvsExADFwnTmcbe9F/tVhGLzNosgUIE5ATgEitvaYg9ukJZUvbUVIWNz90hDxrActISeUp2hHy7jp8z7Zx0= 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: Hello, syzbot found the following issue on: HEAD commit: 439fc29dfd3b Merge tag 'drm-fixes-2025-11-09' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15484412580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e46b8a1c645465a9 dashboard link: https://syzkaller.appspot.com/bug?extid=18d274a59b87cf80e86d compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87634fccbb6c/disk-439fc29d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4d7897eed027/vmlinux-439fc29d.xz kernel image: https://storage.googleapis.com/syzbot-assets/388814b7d484/bzImage-439fc29d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+18d274a59b87cf80e86d@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 23212 at mm/page_table_check.c:191 page_table_check_pte_flags mm/page_table_check.c:191 [inline] WARNING: CPU: 0 PID: 23212 at mm/page_table_check.c:191 __page_table_check_ptes_set+0x13e/0x2f0 mm/page_table_check.c:204 Modules linked in: CPU: 0 UID: 0 PID: 23212 Comm: syz.0.4613 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:page_table_check_pte_flags mm/page_table_check.c:191 [inline] RIP: 0010:__page_table_check_ptes_set+0x13e/0x2f0 mm/page_table_check.c:204 Code: b8 00 00 00 00 00 00 00 70 49 39 c7 74 21 48 b8 00 00 00 00 00 00 00 6c 49 39 c7 75 1d e8 3a 29 8f ff eb 10 e8 33 29 8f ff 90 <0f> 0b 90 eb 10 e8 28 29 8f ff 90 0f 0b 90 eb 05 e8 1d 29 8f ff 31 RSP: 0000:ffffc9000fd27990 EFLAGS: 00010287 RAX: ffffffff8230ea9d RBX: 00000000397c2c67 RCX: 0000000000080000 RDX: ffffc9000c8da000 RSI: 00000000000042d3 RDI: 00000000000042d4 RBP: 0000000000000001 R08: ffffea0000e5f087 R09: 1ffffd40001cbe10 R10: dffffc0000000000 R11: fffff940001cbe11 R12: 0000000000000001 R13: 00000000397c2c67 R14: ffff8880525baff0 R15: ffff88801a05ab00 FS: 0000000000000000(0000) GS:ffff88812613b000(0063) knlGS:00000000f54bdb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000080ffe000 CR3: 0000000077a7e000 CR4: 00000000003526f0 Call Trace: page_table_check_ptes_set include/linux/page_table_check.h:76 [inline] set_ptes include/linux/pgtable.h:292 [inline] do_swap_page+0x5248/0x5b20 mm/memory.c:4970 handle_pte_fault mm/memory.c:6180 [inline] __handle_mm_fault+0xe55/0x5400 mm/memory.c:6318 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0023:0xf70ef1f0 Code: 50 6a 00 e8 c2 10 14 00 8b 5c 24 2c 8b 4c 24 28 83 c4 20 8b 55 40 89 03 03 11 85 f6 74 18 31 c0 8d b4 26 00 00 00 00 8d 76 00 <89> 02 83 c0 01 83 c2 04 39 c6 75 f4 83 c4 1c 89 f8 5b 5e 5f 5d c3 RSP: 002b:00000000f54bd540 EFLAGS: 00010202 RAX: 0000000000000800 RBX: 00000000800000c0 RCX: 0000000080000000 RDX: 0000000080ffdfff RSI: 0000000000000efe RDI: 0000000000000008 RBP: 0000000080000140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 50 push %rax 1: 6a 00 push $0x0 3: e8 c2 10 14 00 call 0x1410ca 8: 8b 5c 24 2c mov 0x2c(%rsp),%ebx c: 8b 4c 24 28 mov 0x28(%rsp),%ecx 10: 83 c4 20 add $0x20,%esp 13: 8b 55 40 mov 0x40(%rbp),%edx 16: 89 03 mov %eax,(%rbx) 18: 03 11 add (%rcx),%edx 1a: 85 f6 test %esi,%esi 1c: 74 18 je 0x36 1e: 31 c0 xor %eax,%eax 20: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 27: 8d 76 00 lea 0x0(%rsi),%esi * 2a: 89 02 mov %eax,(%rdx) <-- trapping instruction 2c: 83 c0 01 add $0x1,%eax 2f: 83 c2 04 add $0x4,%edx 32: 39 c6 cmp %eax,%esi 34: 75 f4 jne 0x2a 36: 83 c4 1c add $0x1c,%esp 39: 89 f8 mov %edi,%eax 3b: 5b pop %rbx 3c: 5e pop %rsi 3d: 5f pop %rdi 3e: 5d pop %rbp 3f: c3 ret --- 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 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