BTRFS: device fsid fff69206-0000-0000-b81e-1b00920efd9a devid 0 transid 0 /dev/loop1 ================================================================== BUG: KCSAN: data-race in __lru_cache_add / lru_add_drain_all write to 0xffff88812bf27620 of 1 bytes by task 12255 on cpu 1: pagevec_add include/linux/pagevec.h:81 [inline] __lru_cache_add+0xbf/0x1d0 mm/swap.c:405 lru_cache_add mm/swap.c:442 [inline] lru_cache_add_active_or_unevictable+0xb6/0x1f0 mm/swap.c:472 wp_page_copy+0x820/0x1120 mm/memory.c:2369 do_wp_page+0x192/0x11f0 mm/memory.c:2628 handle_pte_fault mm/memory.c:3865 [inline] __handle_mm_fault+0x1ab1/0x2c70 mm/memory.c:3973 handle_mm_fault+0x21b/0x530 mm/memory.c:4010 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202 read to 0xffff88812bf27620 of 1 bytes by task 12242 on cpu 0: lru_add_drain_all+0xf5/0x350 mm/swap.c:728 invalidate_bdev+0x6e/0x90 fs/block_dev.c:97 btrfs_get_bdev_and_sb+0xbb/0x1a0 fs/btrfs/volumes.c:488 btrfs_open_one_device fs/btrfs/volumes.c:797 [inline] open_fs_devices+0x3d2/0x640 fs/btrfs/volumes.c:1336 btrfs_open_devices+0xc5/0xd0 fs/btrfs/volumes.c:1381 btrfs_mount_root+0x4b8/0xb00 fs/btrfs/super.c:1533 legacy_get_tree+0x7e/0xf0 fs/fs_context.c:647 vfs_get_tree+0x56/0x1a0 fs/super.c:1545 fc_mount+0x20/0x80 fs/namespace.c:962 vfs_kern_mount.part.0+0xe6/0xf0 fs/namespace.c:992 vfs_kern_mount+0x49/0x70 fs/namespace.c:979 btrfs_mount+0x250/0xf37 fs/btrfs/super.c:1621 legacy_get_tree+0x7e/0xf0 fs/fs_context.c:647 vfs_get_tree+0x56/0x1a0 fs/super.c:1545 do_new_mount fs/namespace.c:2823 [inline] do_mount+0x1049/0x1560 fs/namespace.c:3143 ksys_mount+0xe8/0x160 fs/namespace.c:3352 __do_sys_mount fs/namespace.c:3366 [inline] __se_sys_mount fs/namespace.c:3363 [inline] __x64_sys_mount+0x70/0x90 fs/namespace.c:3363 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12242 Comm: syz-executor.1 Not tainted 5.4.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================