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@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== 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@xxxxxxxxxxxxxxxx. 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
