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Tue, 25 Mar 2025 16:15:24 -0700 (PDT) Date: Tue, 25 Mar 2025 16:15:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67e3390c.050a0220.1ec46.0001.GAE@google.com> Subject: [syzbot] [mm?] KCSAN: data-race in try_to_migrate_one / vms_clear_ptes (2) From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, jannh@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: B50182000B X-Rspamd-Server: rspam05 X-Rspam-User: X-Stat-Signature: jhpysqzyhbmy747gch188b1qgr5b6u8g X-HE-Tag: 1742944525-750272 X-HE-Meta: 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 QxNQIE/v 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 zwKfDCUA kamQQZ38vTLQTp4XZGrOcKBE5DZD1Eg5OWDND6Utew9yW/+JTMm/TRtHf7ocXw04C1hT4jzUriu77Ap3dIblWy+X2HT6Wgr/PrYmHHaqt29HgBFyMYWLqU3N+Zj4r8uAT7AeUsc9jgjdcQDnprQPyx7kI8e7HapZjTn9/8TlzZARzmRLBpWpwjcSisZ8GOLPDvKvCyU338xZNPPFf1HqPNAdJaaAYCqLHsBnPEGslzmBPJLUYpwlkq1YsCEosnLVBzrAPD6TueT8/IURWBSkL3pKEmkuzOzoz8dxnscpJ2D00w3ertCIJMvG7Mxb+9zUf3ppLdSGQDs4DPI00Nduax93k5RYvuqjE0Pc8qm4U+oX3bZMreIP4uGb9ygRNtJtqkHTHe43UWfwxhi66iXqsq7n8BKaaG10 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: 3ba7dfb8da62 Merge tag 'rcu-next-v6.15' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14254198580000 kernel config: https://syzkaller.appspot.com/x/.config?x=79f1cf4142160c34 dashboard link: https://syzkaller.appspot.com/bug?extid=93107467480b9f9ed726 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/dd40b872cca9/disk-3ba7dfb8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/86a3a241fb7d/vmlinux-3ba7dfb8.xz kernel image: https://storage.googleapis.com/syzbot-assets/1ce46917915c/bzImage-3ba7dfb8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+93107467480b9f9ed726@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in try_to_migrate_one / vms_clear_ptes write to 0xffff88810005d8f8 of 8 bytes by task 8860 on cpu 1: update_hiwater_rss include/linux/mm.h:2675 [inline] vms_clear_ptes+0x1a2/0x300 mm/vma.c:1136 vms_complete_munmap_vmas+0x17b/0x480 mm/vma.c:1186 do_vmi_align_munmap+0x344/0x390 mm/vma.c:1445 do_vmi_munmap+0x1eb/0x230 mm/vma.c:1493 __vm_munmap+0x19a/0x280 mm/vma.c:2956 __do_sys_munmap mm/mmap.c:1084 [inline] __se_sys_munmap mm/mmap.c:1081 [inline] __x64_sys_munmap+0x36/0x40 mm/mmap.c:1081 x64_sys_call+0xe1b/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:12 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810005d8f8 of 8 bytes by task 8858 on cpu 0: update_hiwater_rss include/linux/mm.h:2674 [inline] try_to_migrate_one+0x775/0x12e0 mm/rmap.c:2183 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2646 try_to_migrate+0x11f/0x150 migrate_folio_unmap mm/migrate.c:1318 [inline] migrate_pages_batch+0x786/0x1930 mm/migrate.c:1864 migrate_pages_sync mm/migrate.c:1987 [inline] migrate_pages+0xf02/0x1840 mm/migrate.c:2096 do_mbind mm/mempolicy.c:1425 [inline] kernel_mbind mm/mempolicy.c:1568 [inline] __do_sys_mbind mm/mempolicy.c:1642 [inline] __se_sys_mbind+0xfd1/0x11c0 mm/mempolicy.c:1638 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1638 x64_sys_call+0x13be/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:238 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000001f8f -> 0x000000000000262f Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 8858 Comm: syz.2.1483 Tainted: G W 6.14.0-syzkaller-00685-g3ba7dfb8da62 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== --- 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