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Thu, 03 Apr 2025 00:05:20 -0700 (PDT) Date: Thu, 03 Apr 2025 00:05:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67ee3330.050a0220.9040b.014e.GAE@google.com> Subject: [syzbot] [mm?] KCSAN: data-race in getrusage / try_to_unmap_one (2) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam01 X-Stat-Signature: mqz3fg117onqxbmuef469tje7o1fnwzq X-Rspam-User: X-Rspamd-Queue-Id: 2DFDC4000E X-HE-Tag: 1743663920-114913 X-HE-Meta: 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 y2tE801M 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 kfPBEgNu xc5cQMnmdKujoRId9UDpOvUZVntAJ8/oN8zKqKM6aVfkVx4SKosil+77ziBwIwD+5VtIfebpQdDPl0T4gYE2m7bHLujGDGKo3MkV1QfKA/fgSK9df2cr6Zs6MgZTAonkM50XYNV87GBCtwmKM4549EDSI/2ixJThUPdhpsUd+KC774NvbRT5u33WBIQE2v1Qh6/uQCgDdUtlchtwmtmE75H2JVd+9TZM/7s8BelcuNrDEFW4V0LD9u9hWjxQFH7THLmR/648xELY1SJTCl/Ji1JyLzSJLnX3NsMf/sQ8bC4mIb1tQgbSMvrOr7DVbqS54rqOFe8v0CemoqUQJsJM/QN3jgtl8K7d70mGsJXugFvrRZxu13nQDsiKakGDnU87dM7ZXdaXOEBdSni3s3QkE7Y/LnjwOyR9 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: 92b71befc349 Merge tag 'objtool-urgent-2025-04-01' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=106d5274580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a8120cade23cf14e dashboard link: https://syzkaller.appspot.com/bug?extid=988c9343ca9f2c49b9c4 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/2e7df7bc2f52/disk-92b71bef.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/be59123d5efb/vmlinux-92b71bef.xz kernel image: https://storage.googleapis.com/syzbot-assets/7c9eff86053e/bzImage-92b71bef.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+988c9343ca9f2c49b9c4@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in getrusage / try_to_unmap_one write to 0xffff888104235900 of 8 bytes by task 3866 on cpu 0: update_hiwater_rss include/linux/mm.h:2754 [inline] try_to_unmap_one+0xebb/0x1f60 mm/rmap.c:2061 __rmap_walk_file+0x1c1/0x2c0 mm/rmap.c:2897 try_to_unmap+0x1b7/0x1e0 mm/rmap.c:-1 shrink_folio_list+0x11f6/0x2670 mm/vmscan.c:1373 reclaim_folio_list+0x83/0x2f0 mm/vmscan.c:2217 reclaim_pages+0x218/0x280 mm/vmscan.c:2254 madvise_cold_or_pageout_pte_range+0xd4f/0xdb0 mm/madvise.c:558 walk_pmd_range mm/pagewalk.c:130 [inline] walk_pud_range mm/pagewalk.c:226 [inline] walk_p4d_range mm/pagewalk.c:264 [inline] walk_pgd_range+0x7e5/0x1120 mm/pagewalk.c:305 __walk_page_range+0xed/0x350 mm/pagewalk.c:412 walk_page_range_mm+0x369/0x4c0 mm/pagewalk.c:505 walk_page_range+0x56/0x70 mm/pagewalk.c:584 madvise_pageout_page_range mm/madvise.c:617 [inline] madvise_pageout mm/madvise.c:644 [inline] madvise_vma_behavior mm/madvise.c:1269 [inline] madvise_walk_vmas mm/madvise.c:1530 [inline] madvise_do_behavior+0x1aeb/0x2530 mm/madvise.c:1695 do_madvise mm/madvise.c:1782 [inline] __do_sys_madvise mm/madvise.c:1790 [inline] __se_sys_madvise mm/madvise.c:1788 [inline] __x64_sys_madvise+0xcb/0x100 mm/madvise.c:1788 x64_sys_call+0x23b8/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:29 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888104235900 of 8 bytes by task 3858 on cpu 1: get_mm_hiwater_rss include/linux/mm.h:2741 [inline] setmax_mm_hiwater_rss include/linux/mm.h:2771 [inline] getrusage+0xa17/0xb70 kernel/sys.c:1876 io_sq_thread+0x5e0/0x1140 io_uring/sqpoll.c:310 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00000000000016f1 -> 0x0000000000001951 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3858 Comm: iou-sqp-3852 Not tainted 6.14.0-syzkaller-12508-g92b71befc349 #0 PREEMPT(voluntary) 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