================================================================== BUG: KCSAN: data-race in kmmpd / mount_bdev write to 0xffff8881392b1050 of 8 bytes by task 16833 on cpu 1: mount_bdev+0x240/0x290 fs/super.c:1374 ext4_mount+0x2d/0x40 fs/ext4/super.c:6634 legacy_get_tree+0x70/0xc0 fs/fs_context.c:592 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x11d4/0x1ce0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3433 __x64_sys_mount+0x63/0x70 fs/namespace.c:3433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881392b1050 of 8 bytes by task 16842 on cpu 0: sb_rdonly include/linux/fs.h:2220 [inline] kmmpd+0x2ef/0x5f0 fs/ext4/mmp.c:187 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 value changed: 0x0000000010010000 -> 0x0000000070010000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 16842 Comm: kmmpd-loop3 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================