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Mon, 30 Sep 2024 00:39:24 -0700 (PDT) Date: Mon, 30 Sep 2024 00:39:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66fa55ac.050a0220.aab67.002a.GAE@google.com> Subject: [syzbot] [mm?] KCSAN: data-race in exec_mmap / vms_clear_ptes From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, 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-Server: rspam07 X-Rspamd-Queue-Id: 6E3D71C0006 X-Stat-Signature: mugegyhdg9sngafuiaes9byyccrywtb8 X-Rspam-User: X-HE-Tag: 1727681965-176510 X-HE-Meta: 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 Ug3C2zmZ 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 4OJu6aii +SOvZvGcLhsToOIZL4Yew2DUBuOxwpAPuIZTECnlyeUKdNyJ87vXF/RPBW+Dj1z46zPkcQS1fRsRiJXTyKpL+guhyEj49qkcLocFoqB0KZyqq9CuEpxQX6tKZFTiIiKnk3jktAHCxjLAxbaMvbhjXFx+q+u1bYFiAgp1Z6pDW/vJaVfJRVF85bU2NzfddzF2fsZnb9YiX268Ph/WR0zTt6g38F53kVGb52hwwgyaiN1keZw1lAAMAq8AclBldxGJCuADDa9e7yKrt72vJ65z56VTDHTHHoEgO0TAdPy/VSRia6mZD2Irwq1J1JXljYFMZ1dsW93gg2ACCQjCClLLKEZmJyXYn2z3mTBiaGM7YvCEr3piUKNe9AOsc2YvEFgFNOzcql50h3uZkjAH6ZnYnWqtFMuKfx/R 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: e7ed34365879 Merge tag 'mailbox-v6.12' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15238ea9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8bfe37bd3f5983d6 dashboard link: https://syzkaller.appspot.com/bug?extid=d207c41e97001109b49d 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/c86c1297298e/disk-e7ed3436.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8313c0846b3b/vmlinux-e7ed3436.xz kernel image: https://storage.googleapis.com/syzbot-assets/8af10d85db09/bzImage-e7ed3436.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d207c41e97001109b49d@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in exec_mmap / vms_clear_ptes write to 0xffff888102fbaae8 of 8 bytes by task 3004 on cpu 1: update_hiwater_rss include/linux/mm.h:2655 [inline] vms_clear_ptes+0x1a7/0x300 mm/vma.c:1088 vms_complete_munmap_vmas+0x170/0x480 mm/vma.c:1140 do_vmi_align_munmap+0x349/0x390 mm/vma.c:1349 do_vmi_munmap+0x1eb/0x230 mm/vma.c:1397 __vm_munmap+0xfd/0x220 mm/mmap.c:1600 __do_sys_munmap mm/mmap.c:1617 [inline] __se_sys_munmap mm/mmap.c:1614 [inline] __x64_sys_munmap+0x36/0x40 mm/mmap.c:1614 x64_sys_call+0xd32/0x2d60 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 0xffff888102fbaae8 of 8 bytes by task 5494 on cpu 0: get_mm_hiwater_rss include/linux/mm.h:2642 [inline] setmax_mm_hiwater_rss include/linux/mm.h:2672 [inline] exec_mmap+0x2d0/0x440 fs/exec.c:1012 begin_new_exec+0xaf9/0x10b0 fs/exec.c:1280 load_elf_binary+0x63b/0x19e0 fs/binfmt_elf.c:996 search_binary_handler fs/exec.c:1752 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0x4e6/0xc30 fs/exec.c:1845 do_execveat_common+0x793/0x800 fs/exec.c:1952 do_execve fs/exec.c:2026 [inline] __do_sys_execve fs/exec.c:2102 [inline] __se_sys_execve fs/exec.c:2097 [inline] __x64_sys_execve+0x5a/0x70 fs/exec.c:2097 x64_sys_call+0x1277/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:60 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: 0x000000000000022b -> 0x000000000000024b Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 5494 Comm: dhcpcd Not tainted 6.11.0-syzkaller-12113-ge7ed34365879 #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