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baohua@kernel.org, david@kernel.org, dev.jain@arm.com, lance.yang@linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, richard.weiyang@gmail.com, vernon2gm@gmail.com, yanglincheng@kylinos.cn, ziy@nvidia.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 8B4BB1C0010 X-Stat-Signature: 96shkmbbj8pp9qi3nu5ai3ths56wnjhb X-Rspam-User: X-HE-Tag: 1767003673-497567 X-HE-Meta: U2FsdGVkX1/d4yCqznC6ftVSsP7yy42x6lG9jbMx/ZBOOCNUovw5Lyxym0WvpJJKuEGHdHODleDoOfut8tNJi4rvzx1MJ467kWXfNufWZBtdMvievIcnrXMxOj93v2xNod9W4iIHefqj6CDXsS3VyS716lQ10h2XJWt3e1JRT8WM5gd/Y2l/LCmHrmO/SaKDVJzc31VB0WnmZFO43NgmXATMY8WKs1PKO1mreFgkeYK3FHaz2rElO47yjOorqDniyp1jLfSJMGDqXThYN3qnZHTbPdi1LT31pOxwvsC3ukSh1E1uFNZAG9t2PCtSmmepSL5jrBmh+3ExXjJTUYChmHKhd7D1/4nDxFZcdJz4SolrbGhRtrVTt1XAUxhrMbhwihkg5xlBQ1w2uc0kI7dNzABnAh66maJY1BO9EHel+S9xq60TCCOVTS3I2u0rgdZf8vJt/FfFKUKrSz3BECyzcXN2rZrPLnK44qk4x69GCsecx/AACai5FAo15jjqUhNUGX8DvOOxuz535HBwRJGKFRBe05iZbVz3fSqLEI1mipJ9dj5quwdYhlkH4G2noQO6a8F9+uIdyhuW9BhHJDrnjd5mEOOGgDp5gbfjZpOEZ29e0F5UOeD9BKxB7ZqH0WTedsuqWkgVdPygjT5DI7GBVSbZ/AOnYkTqiZhN1o5t7XPuFVThcj07llKKUjMJhq2WNXgPawlPAGdZ8frEKQVksv3ISWGJ7aI1JHlgNdOyromdiUcFvtjjpX7r2Xv9BoGvEnIUbSst1VYDwT7FEqDl3VapX4xUJbqTtFs0eGA5OScAywjgDXgGHJTnULaYLpuIUgIjw7dTKf+PIrxSoAmZozwhorziPh2r8ehirpS0RY4lZ9e+gglY2EcB2pjC8ov6katLzJTGU9ZowFQVdJwz6+x0runfnMhICFt+khfHdj9fyyCDgdyMwxxtD77s+dSv+PrtXn7HIcEcySnasoF QajFu6ag 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 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: syzbot ci has tested the following series [v2] Improve khugepaged scan logic https://lore.kernel.org/all/20251229055151.54887-1-yanglincheng@kylinos.cn * [PATCH v2 1/4] mm: khugepaged: add trace_mm_khugepaged_scan event * [PATCH v2 2/4] mm: khugepaged: just skip when the memory has been collapsed * [PATCH v2 3/4] mm: khugepaged: set VM_NOHUGEPAGE flag when MADV_COLD/MADV_FREE * [PATCH v2 4/4] mm: khugepaged: set to next mm direct when mm has MMF_DISABLE_THP_COMPLETELY and found the following issue: WARNING in madvise_dontneed_free Full report is available here: https://ci.syzbot.org/series/f936dff1-2423-4f46-a59a-ea041c1d741a *** WARNING in madvise_dontneed_free tree: mm-new URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/akpm/mm.git base: 33b485bade996a9d0154cf0888b7a5c23723121e arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/81f62216-5094-4281-a942-238b7448a3be/config C repro: https://ci.syzbot.org/findings/e308c3a0-c806-45c4-bc1c-24536a3c3ca3/c_repro syz repro: https://ci.syzbot.org/findings/e308c3a0-c806-45c4-bc1c-24536a3c3ca3/syz_repro ------------[ cut here ]------------ WARNING: mm/madvise.c:795 at get_walk_lock mm/madvise.c:795 [inline], CPU#0: syz.0.17/5977 WARNING: mm/madvise.c:795 at madvise_free_single_vma mm/madvise.c:830 [inline], CPU#0: syz.0.17/5977 WARNING: mm/madvise.c:795 at madvise_dontneed_free+0xb52/0xe10 mm/madvise.c:960, CPU#0: syz.0.17/5977 Modules linked in: CPU: 0 UID: 0 PID: 5977 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:get_walk_lock mm/madvise.c:795 [inline] RIP: 0010:madvise_free_single_vma mm/madvise.c:830 [inline] RIP: 0010:madvise_dontneed_free+0xb52/0xe10 mm/madvise.c:960 Code: c7 c6 b0 6e 25 8e e8 7d 4c a3 ff 48 83 fb 01 74 0c 83 fb 03 75 0e e8 ed 46 a3 ff eb 12 e8 e6 46 a3 ff eb 09 e8 df 46 a3 ff 90 <0f> 0b 90 31 db 89 9c 24 08 01 00 00 48 8b 74 24 68 48 8b 54 24 70 RSP: 0018:ffffc90004a17400 EFLAGS: 00010293 RAX: ffffffff821e7411 RBX: 0000000000000002 RCX: ffff888169b7d7c0 RDX: 0000000000000000 RSI: ffffffff8e256eb0 RDI: 0000000000000002 RBP: ffffc90004a175b0 R08: ffff888169b7d7c0 R09: 0000000000000002 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000100 R15: 1ffff92000942e88 FS: 0000555555761500(0000) GS:ffff88818e62f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe49d72b600 CR3: 00000001b85b6000 CR4: 00000000000006f0 Call Trace: madvise_vma_behavior+0xd57/0x3680 mm/madvise.c:1385 madvise_walk_vmas+0x575/0xaf0 mm/madvise.c:1730 madvise_do_behavior+0x38e/0x550 mm/madvise.c:1944 do_madvise+0x1bc/0x270 mm/madvise.c:2037 __do_sys_madvise mm/madvise.c:2046 [inline] __se_sys_madvise mm/madvise.c:2044 [inline] __x64_sys_madvise+0xa7/0xc0 mm/madvise.c:2044 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe49d78f7c9 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:00007fff39cea178 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fe49d9e5fa0 RCX: 00007fe49d78f7c9 RDX: 0000000000000008 RSI: 0000000000600002 RDI: 0000200000000000 RBP: 00007fe49d7f297f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe49d9e5fa0 R14: 00007fe49d9e5fa0 R15: 0000000000000003 *** 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.