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Wed, 02 Oct 2024 00:26:24 -0700 (PDT) Date: Wed, 02 Oct 2024 00:26:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66fcf5a0.050a0220.f28ec.04fa.GAE@google.com> Subject: [syzbot] [mm?] KCSAN: data-race in __delete_from_swap_cache / __try_to_reclaim_swap 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-Rspam-User: X-Rspamd-Queue-Id: B87E0180006 X-Rspamd-Server: rspam01 X-Stat-Signature: eyn7djhh137nb1134jdrj1i8qs83umhe X-HE-Tag: 1727853985-557818 X-HE-Meta: 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 nhTRA4r6 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 JUYqKwqf 6InnNUlO+/RpUkN8u31OZyIq3J5TdKLTgav1AxMor8IpDCwjCS/cpGX8zlPWAXRetnvEG5FgBhfAezQ4R4jMOBZhs9QIRnFVpHJnVS/Zz1Fn/LV4B2/8oz5MtJeJEi5DaJYzOQ1K5usct75LTGz9mrYjUoVroc7oog7th1nEvKtjJnWxRDfYk/ZtG6QxVySk0njC6Crz8GIK6iF5J2tMhqXUFEuDSCfHIusDLM4oNl1GjFlm03Ksux3ZdL6TafjRqN73GurzdQ582mFzvF9gF6atVGWYeLIuTpgn5Bg61FtGT6vG3oaNSYnpsJIJUcb1HRq+nzWoRa2RwfkZvEKWD+FSoT4YugsQGpqf29XxaVW20kbHSmQVC5DV1PnsT4XFUVNF3jP5EHiJOE0lASNfKpATEbTzM/nf 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: e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10fb8307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=13af6e9c27c7bbbf dashboard link: https://syzkaller.appspot.com/bug?extid=fa43f1b63e3aa6f66329 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/e728901b4154/disk-e32cde8d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e662806fa232/vmlinux-e32cde8d.xz kernel image: https://storage.googleapis.com/syzbot-assets/ed885d1a3f98/bzImage-e32cde8d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fa43f1b63e3aa6f66329@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in __delete_from_swap_cache / __try_to_reclaim_swap write to 0xffffea0004c90328 of 8 bytes by task 5186 on cpu 0: __delete_from_swap_cache+0x1f0/0x290 mm/swap_state.c:163 delete_from_swap_cache+0x72/0xe0 mm/swap_state.c:243 folio_free_swap+0x1d8/0x1f0 mm/swapfile.c:1850 free_swap_cache mm/swap_state.c:293 [inline] free_pages_and_swap_cache+0x1fc/0x410 mm/swap_state.c:325 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x2cf/0x440 mm/mmu_gather.c:373 zap_pte_range mm/memory.c:1700 [inline] zap_pmd_range mm/memory.c:1739 [inline] zap_pud_range mm/memory.c:1768 [inline] zap_p4d_range mm/memory.c:1789 [inline] unmap_page_range+0x1f3c/0x22d0 mm/memory.c:1810 unmap_single_vma+0x142/0x1d0 mm/memory.c:1856 unmap_vmas+0x18d/0x2b0 mm/memory.c:1900 exit_mmap+0x18a/0x690 mm/mmap.c:1864 __mmput+0x28/0x1b0 kernel/fork.c:1347 mmput+0x4c/0x60 kernel/fork.c:1369 exit_mm+0xe4/0x190 kernel/exit.c:571 do_exit+0x55e/0x17f0 kernel/exit.c:926 do_group_exit+0x102/0x150 kernel/exit.c:1088 get_signal+0xf2a/0x1070 kernel/signal.c:2917 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffea0004c90328 of 8 bytes by task 5189 on cpu 1: __try_to_reclaim_swap+0x9d/0x510 mm/swapfile.c:198 free_swap_and_cache_nr+0x45d/0x8a0 mm/swapfile.c:1915 zap_pte_range mm/memory.c:1656 [inline] zap_pmd_range mm/memory.c:1739 [inline] zap_pud_range mm/memory.c:1768 [inline] zap_p4d_range mm/memory.c:1789 [inline] unmap_page_range+0xcf8/0x22d0 mm/memory.c:1810 unmap_single_vma+0x142/0x1d0 mm/memory.c:1856 unmap_vmas+0x18d/0x2b0 mm/memory.c:1900 exit_mmap+0x18a/0x690 mm/mmap.c:1864 __mmput+0x28/0x1b0 kernel/fork.c:1347 mmput+0x4c/0x60 kernel/fork.c:1369 exit_mm+0xe4/0x190 kernel/exit.c:571 do_exit+0x55e/0x17f0 kernel/exit.c:926 __do_sys_exit kernel/exit.c:1055 [inline] __se_sys_exit kernel/exit.c:1053 [inline] __x64_sys_exit+0x1f/0x20 kernel/exit.c:1053 x64_sys_call+0x2d46/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:61 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: 0x0000000000000242 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 5189 Comm: syz.1.320 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== --- 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