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Fri, 21 Apr 2023 07:32:54 -0700 (PDT) Date: Fri, 21 Apr 2023 07:32:54 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000058b63f05f9d98811@google.com> Subject: [syzbot] [cgroups?] [mm?] KCSAN: data-race in drain_all_stock / drain_obj_stock (4) From: syzbot To: akpm@linux-foundation.org, bpf@vger.kernel.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, shakeelb@google.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 32270A001F X-Stat-Signature: ahcassquy87bn9rzpwzb9f4km37rzscj X-HE-Tag: 1682087574-3617 X-HE-Meta: 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 WnxFLuun xHe6xuy4E+qLzmebr2ucBqIh8je9Cfbuvm9fVHI1cwL4ynnRbmudR72cSHyT9AXbY74mrsHUmPNM5DGP9waIjH0Y2edxKAsSSBi5Dlb3eajtUCq+dqQ6cjqaUFx1ysc45W8cVbYDTvULFFYqpUNXzgkp4LPoCAvbZnwr40TSwg57KdUIpPDJMlDJRbcJNpUTe5VoAIIMx221gDCUpjhCkn0MOYEc4yGwNncEX9JysWanvBRB21d+Hgz2N/z6Km3NHRUMzWa8RQDbcjdNAf0D65KoKTHgTWw/R39J6JdMoY/sM23WP9IGMX3mO6iwemxt1j3R80Kh1VYTJLVqfnKR11Yl4+91EROP0AiQga9wHemzgLnIjLko+aEq/X0U0ol8FKienID6QhGPNrMiQAJhQ59OdjCTGsscBxBQSc1yEOA2wbI0XNZ4Q/fyuJzwzuaLQXHYJlydFbWEVgmZyjL4fMqtisjZtptNDFhwRIqSrz5aqP+LhIN9/nF3hvTuYwKmQrBSEkx5C+r04YLhxF2qo8otTu8ngb/u5cQWASY9vA9mKGlg1ODvRclBny7qErDh+qB+PU4uTKPV3TEMCnpTGumtkWwx+PnmSDLJ+SWShQl3sA1K3WUjntEWibs2vALU7dTzn5uskMKdRFrEaX3ClTNu/f91df+gmcIhWPQ6vQxZERvsXeERSPlKgeOKMcVWH06AgjvtgqPowIAbsN0WtGr0oFrkIaYdDGQhT+72ZAKsH/XzN/CKSRB83ymFFPzYAEXYC2xqNOY4gTxOac/9JxfAbpKlBJXr5tVT5xPxg49l9NqbKuGD+oilEGlPITk1nbsPN0l7/QHdegXNFgx8deUsm8Nk7fK+TTxwkx156OTLcj1J0wXDIbr3S3Kn3KF2bu6YAN2tHa0hCaffQFSDeROIGUvEcAVoA+/qO9RLLNuXLhyljlL/z+zelVkoJ4GrSOi6xy2Ch4J/a40ObjbdDx/FhxpQS wjZnr7O5 Epch+roabwUyZL2psjqzDJ7+fH9rBJayccD/1Smz7ydPCuGKhpH1/SeHc3w4azB7OqRyiFtgpLIWMy07guu6fMwOJCsUOpildb+klm25rBP57xYrYk4eJj+C++fgQbcCBntV1YsHTb3G28dZWN9EDOWppwkKxo3SAWR86Uv0EBkOE8EmHSJnTeijylOETnhxDHIzRj6ywc1ViBh61MOr/s4UYLtJN/7Ph8xdLvYkCntvDhyNO1UY5eSIw0bk2y4bQA7nfhnfIyzF09Ibx4uis1p0942XZAanxbWnUTcXC3j+ePsbDWxN6g== 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: Hello, syzbot found the following issue on: HEAD commit: 534293368afa Merge tag 'kbuild-fixes-v6.3' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a0c26ec80000 kernel config: https://syzkaller.appspot.com/x/.config?x=85fa20c996a2e46d dashboard link: https://syzkaller.appspot.com/bug?extid=774c29891415ab0fd29d compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ec0e584af797/disk-53429336.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/423a67f52f94/vmlinux-53429336.xz kernel image: https://storage.googleapis.com/syzbot-assets/8409b9716faa/bzImage-53429336.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+774c29891415ab0fd29d@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in drain_all_stock / drain_obj_stock write to 0xffff888237c2a2f8 of 8 bytes by task 19625 on cpu 0: drain_obj_stock+0x408/0x4e0 mm/memcontrol.c:3306 refill_obj_stock+0x9c/0x1e0 mm/memcontrol.c:3340 obj_cgroup_uncharge+0xe/0x10 mm/memcontrol.c:3408 memcg_slab_free_hook mm/slab.h:587 [inline] __cache_free mm/slab.c:3373 [inline] __do_kmem_cache_free mm/slab.c:3577 [inline] kmem_cache_free+0x105/0x280 mm/slab.c:3602 __d_free fs/dcache.c:298 [inline] dentry_free fs/dcache.c:375 [inline] __dentry_kill+0x422/0x4a0 fs/dcache.c:621 dentry_kill+0x8d/0x1e0 dput+0x118/0x1f0 fs/dcache.c:913 __fput+0x3bf/0x570 fs/file_table.c:329 ____fput+0x15/0x20 fs/file_table.c:349 task_work_run+0x123/0x160 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xcf/0xe0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x6a/0xa0 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888237c2a2f8 of 8 bytes by task 19632 on cpu 1: obj_stock_flush_required mm/memcontrol.c:3319 [inline] drain_all_stock+0x174/0x2a0 mm/memcontrol.c:2361 try_charge_memcg+0x6d0/0xd10 mm/memcontrol.c:2703 try_charge mm/memcontrol.c:2837 [inline] mem_cgroup_charge_skmem+0x51/0x140 mm/memcontrol.c:7290 sock_reserve_memory+0xb1/0x390 net/core/sock.c:1025 sk_setsockopt+0x800/0x1e70 net/core/sock.c:1525 udp_lib_setsockopt+0x99/0x6c0 net/ipv4/udp.c:2692 udp_setsockopt+0x73/0xa0 net/ipv4/udp.c:2817 sock_common_setsockopt+0x61/0x70 net/core/sock.c:3668 __sys_setsockopt+0x1c3/0x230 net/socket.c:2271 __do_sys_setsockopt net/socket.c:2282 [inline] __se_sys_setsockopt net/socket.c:2279 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2279 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0xffff8881382d52c0 -> 0xffff888138893740 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 19632 Comm: syz-executor.0 Not tainted 6.3.0-rc2-syzkaller-00387-g534293368afa #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 ================================================================== --- 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.