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AJvYcCWxirT2EnTf0CQq411+kEg+fts/dXdc151pDbcR7bIvW6BBph0xV/nihjuo2lHZGsh4KGVz8pOTgSjHpA8=@vger.kernel.org X-Gm-Message-State: AOJu0YwtkESS7+1uxHgiXWAkGjBROIUBo175JkeCe5MA7uZ3D+N09PUS dxPnD9RuA347m2MCvXddxFljhkSVBvSy6+GqWl7dsRABEX3yxfxNAgTloWUT35BzUD/76p9MRyq usR0ptcodC9p1eHxTG+4r1nKOM3P9JaYd7ls3EQewYHRnfcuVB0o5ntY= X-Google-Smtp-Source: AGHT+IHpBu45aYzb7as3tfx7l1VYXY+P7ResQkYWihv9GOv2sSsqHfHwX01WeUaKDe714uJyGxHvjZz0JmuIF55jET/ac8ecNLGn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:29c4:b0:803:5e55:ecb2 with SMTP id ca18e2360f4ac-82aa4475e7bmr416211839f.0.1725782462212; Sun, 08 Sep 2024 01:01:02 -0700 (PDT) Date: Sun, 08 Sep 2024 01:01:02 -0700 In-Reply-To: <20240908074757.8436-1-aha310510@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009eb8fe0621970a98@google.com> Subject: Re: [syzbot] [mm?] KCSAN: data-race in generic_fillattr / shmem_mknod (2) From: syzbot To: aha310510@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KCSAN: data-race in pcpu_alloc_noprof / pcpu_free_area ================================================================== BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_free_area read-write to 0xffffffff883f872c of 4 bytes by task 3378 on cpu 0: pcpu_update_empty_pages mm/percpu.c:602 [inline] pcpu_block_update_hint_free mm/percpu.c:1044 [inline] pcpu_free_area+0x4dc/0x570 mm/percpu.c:1302 free_percpu+0x1c6/0xb30 mm/percpu.c:2277 xt_percpu_counter_free+0x63/0x80 net/netfilter/x_tables.c:1951 cleanup_entry+0x195/0x1c0 net/ipv6/netfilter/ip6_tables.c:671 __do_replace+0x470/0x580 net/ipv6/netfilter/ip6_tables.c:1099 do_replace net/ipv6/netfilter/ip6_tables.c:1158 [inline] do_ip6t_set_ctl+0x820/0x8c0 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:998 tcp_setsockopt+0x93/0xb0 net/ipv4/tcp.c:3768 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3735 do_sock_setsockopt net/socket.c:2324 [inline] __sys_setsockopt+0x1d8/0x250 net/socket.c:2347 __do_sys_setsockopt net/socket.c:2356 [inline] __se_sys_setsockopt net/socket.c:2353 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2353 x64_sys_call+0x278d/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x54/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e read to 0xffffffff883f872c of 4 bytes by task 3374 on cpu 1: pcpu_alloc_noprof+0x9a5/0x10c0 mm/percpu.c:1894 xt_percpu_counter_alloc+0x79/0x110 net/netfilter/x_tables.c:1931 find_check_entry net/ipv4/netfilter/ip_tables.c:526 [inline] translate_table+0x921/0xf70 net/ipv4/netfilter/ip_tables.c:716 do_replace net/ipv4/netfilter/ip_tables.c:1137 [inline] do_ipt_set_ctl+0x7bd/0x8b0 net/ipv4/netfilter/ip_tables.c:1635 nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xea/0x100 net/ipv4/ip_sockglue.c:1424 tcp_setsockopt+0x93/0xb0 net/ipv4/tcp.c:3768 sock_common_setsockopt+0x64/0x80 net/core/sock.c:3735 do_sock_setsockopt net/socket.c:2324 [inline] __sys_setsockopt+0x1d8/0x250 net/socket.c:2347 __do_sys_setsockopt net/socket.c:2356 [inline] __se_sys_setsockopt net/socket.c:2353 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2353 x64_sys_call+0x278d/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:55 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x54/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e value changed: 0x00000005 -> 0x00000006 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3374 Comm: syz-executor.3 Not tainted 6.11.0-rc6-syzkaller-00326-gd1f2d51b711a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ================================================================== Tested on: commit: d1f2d51b Merge tag 'clk-fixes-for-linus' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10691ffb980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e81d40b0108ea8fe dashboard link: https://syzkaller.appspot.com/bug?extid=702361cf7e3d95758761 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=117d8877980000