Hello, syzbot found the following issue on: HEAD commit: 4854cf9c61d0 Merge tag 'mips-fixes_6.8_1' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=149d01efe80000 kernel config: https://syzkaller.appspot.com/x/.config?x=e1bd33f45956bbc2 dashboard link: https://syzkaller.appspot.com/bug?extid=ab2213db98841b6ead07 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/e44f160651d1/disk-4854cf9c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f6a2062d07e6/vmlinux-4854cf9c.xz kernel image: https://storage.googleapis.com/syzbot-assets/3d179908ef3c/bzImage-4854cf9c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ab2213db98841b6ead07@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KCSAN: data-race in __sys_connect / smc_switch_to_fallback write to 0xffff88812a230bc8 of 8 bytes by task 1831 on cpu 1: smc_switch_to_fallback+0x453/0x740 net/smc/af_smc.c:924 smc_sendmsg+0xd6/0x330 net/smc/af_smc.c:2772 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff88812a230bc8 of 8 bytes by task 1833 on cpu 0: sock_from_file net/socket.c:514 [inline] __sys_connect_file net/socket.c:2037 [inline] __sys_connect+0x11d/0x1b0 net/socket.c:2065 __do_sys_connect net/socket.c:2075 [inline] __se_sys_connect net/socket.c:2072 [inline] __x64_sys_connect+0x41/0x50 net/socket.c:2072 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x59/0x120 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0xffff8881293bc000 -> 0xffff8881293bf400 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1833 Comm: syz-executor.0 Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ================================================================== --- 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@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
