loop1: detected capacity change from 0 to 1024 EXT4-fs (loop1): Invalid log block size: 196608 ================================================================== BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu write to 0xffff888237c28438 of 8 bytes by task 1915 on cpu 0: __invalidate_bh_lrus fs/buffer.c:1381 [inline] invalidate_bh_lrus_cpu+0xad/0xe0 fs/buffer.c:1426 lru_add_and_bh_lrus_drain mm/swap.c:789 [inline] lru_add_drain_per_cpu+0x4e/0x70 mm/swap.c:808 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x78f/0xa70 kernel/workqueue.c:2441 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 read to 0xffff888237c28438 of 8 bytes by task 17215 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 invalidate_disk+0x25/0xb0 block/genhd.c:685 __loop_clr_fd+0x176/0x3c0 drivers/block/loop.c:1164 loop_clr_fd drivers/block/loop.c:1257 [inline] lo_ioctl+0xd8c/0x1290 drivers/block/loop.c:1563 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614 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+0x63/0xcd value changed: 0xffff88810a9ca750 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17215 Comm: syz-executor.1 Not tainted 6.1.0-rc5-syzkaller-00307-gfe24a97cf254-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================