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Mon, 10 Aug 2026 17:13:29 -0700 (PDT) Date: Mon, 10 Aug 2026 17:13:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7a6929.b50370da.49fe0.005e.GAE@google.com> Subject: [syzbot] [mm?] WARNING in set_mm_walk From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, baohua@kernel.org, david@kernel.org, hannes@cmpxchg.org, kasong@tencent.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mhocko@kernel.org, qi.zheng@linux.dev, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com, weixugc@google.com, yuanchu@google.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 9073CC0005 X-Stat-Signature: z9br49gpk8yn1dmg8dwocbgmdaif8kpk X-Rspam-User: X-HE-Tag: 1786407210-147100 X-HE-Meta: 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 HIAJgClo 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 6QZUwE4g 2JJIM2L+/Fgz37iQ6PNRJeTrT4WnsukELR9siYGzNNY1fh+Qp0M4GxEWedSahc/6GpA+SCE5jhNXoNvvI0P8jgjhVRy4xjBMy3m2adCAzovbYaZur+r48hVKnbuM3+UvhqTGDWfGihmW/Y5jxoqlIaATJ2+8/6c6XmlrfXjOEGtqoXFXWENyIYM2bzjH79k1cJc99K88O3llhIRaexzVj1BQaYajj8RQxDuM2uuT5g5pUHiSyINLp7nC41sIYRfAhZ24Na3EkBP8Xq2Qsufrbfksv8qstFT7kL6aoQN6MZ9xrNKU3egTLRq1xvVkYH3X76t2vmfLhPicl62zVj1XWlTZMueEHEk0iAiecmUxtYh3wXj3T6Zm/KwrgddKu3r523kfRpDk1B7t6FgKsSO7pU08MvTvN0kwiGZzNVEFABZaj53x/+Bzaw2PaxsNU04AZHi+BNr3IsU= 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: 562bfb501c54 Merge tag 'integrity-v7.2-rc7' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a8cbb9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=12ee2725d5fde63a9c96 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-562bfb50.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9cbf6ef0490e/vmlinux-562bfb50.xz kernel image: https://storage.googleapis.com/syzbot-assets/7ee52864c79a/bzImage-562bfb50.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+12ee2725d5fde63a9c96@syzkaller.appspotmail.com ------------[ cut here ]------------ current_is_kswapd() WARNING: mm/vmscan.c:3800 at set_mm_walk+0x210/0x270 mm/vmscan.c:3800, CPU#1: kswapd0/110 Modules linked in: CPU: 1 UID: 0 PID: 110 Comm: kswapd0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:set_mm_walk+0x210/0x270 mm/vmscan.c:3800 Code: 13 00 00 4d 8d 7d 08 e9 f7 fe ff ff e8 79 f5 2a 00 e9 b7 fe ff ff e8 7f 6b ba ff 90 0f 0b 90 e9 d2 fe ff ff e8 71 6b ba ff 90 <0f> 0b 90 e9 74 ff ff ff 4c 89 ff e8 80 f5 2a 00 e9 4e fe ff ff 48 RSP: 0018:ffffc900027772b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888024934a80 RCX: ffffffff824ff8e8 RDX: ffff888024934a80 RSI: ffffffff824ff96f RDI: ffff888024934a80 RBP: 0000000000020000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000020000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90002777c38 R14: 0000000000000001 R15: ffffc90002777c40 FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31923ffc CR3: 0000000109695000 CR4: 0000000000352ef0 DR0: 0000000000000005 DR1: 0000000000000005 DR2: 0000000020040004 DR3: 0000000000000056 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: try_to_inc_max_seq+0xf0/0x1090 mm/vmscan.c:4023 try_to_shrink_lruvec+0x4bd/0x6b0 mm/vmscan.c:4977 lru_gen_shrink_lruvec mm/vmscan.c:5128 [inline] shrink_lruvec+0x31e/0x25b0 mm/vmscan.c:5888 mem_cgroup_shrink_node+0x227/0x6a0 mm/vmscan.c:6753 mem_cgroup_soft_reclaim mm/memcontrol-v1.c:312 [inline] memcg1_soft_limit_reclaim+0x2d5/0x830 mm/memcontrol-v1.c:362 balance_pgdat+0xa11/0x1f00 mm/vmscan.c:7177 kswapd+0x556/0xb50 mm/vmscan.c:7462 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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