================================================================== BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu write to 0xffff888237d28438 of 8 bytes by task 21474 on cpu 1: __invalidate_bh_lrus fs/buffer.c:1392 [inline] invalidate_bh_lrus_cpu+0xad/0xe0 fs/buffer.c:1437 lru_add_and_bh_lrus_drain mm/swap.c:722 [inline] lru_add_drain_per_cpu+0x4e/0x70 mm/swap.c:741 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888237d28438 of 8 bytes by task 6696 on cpu 0: has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1414 smp_call_function_many_cond+0x2a9/0x6d0 kernel/smp.c:917 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1423 invalidate_bdev+0x51/0x80 block/bdev.c:86 invalidate_disk+0x25/0xb0 block/genhd.c:676 __loop_clr_fd+0x3f5/0x640 drivers/block/loop.c:1147 loop_clr_fd drivers/block/loop.c:1230 [inline] lo_ioctl+0xa12/0x11b0 drivers/block/loop.c:1556 blkdev_ioctl+0x20e/0x440 block/ioctl.c:588 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000000 -> 0xffff88810636b000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 6696 Comm: syz-executor.3 Not tainted 5.18.0-rc2-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================