EXT4-fs (loop1): unmounting filesystem. ================================================================== BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru write to 0xffff888237c28438 of 8 bytes by task 1838 on cpu 0: __invalidate_bh_lrus fs/buffer.c:1381 [inline] invalidate_bh_lru+0xad/0x110 fs/buffer.c:1393 smp_call_function_many_cond+0x4ee/0x650 kernel/smp.c:978 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412 invalidate_bdev+0x51/0x80 block/bdev.c:85 ext4_put_super+0x510/0x810 fs/ext4/super.c:1273 generic_shutdown_super+0xd5/0x240 fs/super.c:492 kill_block_super+0x4a/0x90 fs/super.c:1428 deactivate_locked_super+0x6a/0xb0 fs/super.c:332 deactivate_super+0x85/0x90 fs/super.c:363 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1186 __cleanup_mnt+0x15/0x20 fs/namespace.c:1193 task_work_run+0xde/0x110 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x130 kernel/entry/common.c:171 exit_to_user_mode_prepare kernel/entry/common.c:203 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:296 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888237c28438 of 8 bytes by task 1827 on cpu 1: has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1403 smp_call_function_many_cond+0x2e3/0x650 kernel/smp.c:935 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412 invalidate_bdev+0x51/0x80 block/bdev.c:85 ext4_put_super+0x510/0x810 fs/ext4/super.c:1273 generic_shutdown_super+0xd5/0x240 fs/super.c:492 kill_block_super+0x4a/0x90 fs/super.c:1428 deactivate_locked_super+0x6a/0xb0 fs/super.c:332 deactivate_super+0x85/0x90 fs/super.c:363 cleanup_mnt+0x267/0x2d0 fs/namespace.c:1186 __cleanup_mnt+0x15/0x20 fs/namespace.c:1193 task_work_run+0xde/0x110 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x130 kernel/entry/common.c:171 exit_to_user_mode_prepare kernel/entry/common.c:203 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:296 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0xffff888105fc72d8 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1827 Comm: syz-executor.1 Not tainted 6.1.0-rc5-syzkaller-00008-ge01d50cbd6ee-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ================================================================== EXT4-fs (loop1): unmounting filesystem. EXT4-fs (loop1): unmounting filesystem.