EXT4-fs (loop4): mount failed ================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / lru_cache_add write to 0xffff888237c42528 of 1 bytes by task 32039 on cpu 0: pagevec_add include/linux/pagevec.h:74 [inline] pagevec_add_and_need_flush mm/swap.c:244 [inline] lru_cache_add+0x75/0x150 mm/swap.c:474 shmem_getpage_gfp+0xc95/0x13d0 mm/shmem.c:1956 shmem_getpage mm/shmem.c:155 [inline] shmem_fallocate+0x544/0x840 mm/shmem.c:2751 vfs_fallocate+0x463/0x660 fs/open.c:311 file_ioctl fs/ioctl.c:497 [inline] do_vfs_ioctl+0x1322/0x1410 fs/ioctl.c:1048 __do_sys_ioctl fs/ioctl.c:1067 [inline] __se_sys_ioctl+0x83/0x140 fs/ioctl.c:1055 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055 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 0xffff888237c42528 of 1 bytes by task 32098 on cpu 1: pagevec_count include/linux/pagevec.h:61 [inline] __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:828 lru_add_drain_all+0xc/0x10 mm/swap.c:850 invalidate_bdev+0x50/0x70 fs/block_dev.c:96 __loop_clr_fd+0x566/0x8f0 drivers/block/loop.c:1402 loop_clr_fd drivers/block/loop.c:1496 [inline] lo_ioctl+0xa48/0x1340 drivers/block/loop.c:1852 blkdev_ioctl+0x1d0/0x3c0 block/ioctl.c:585 block_ioctl+0x6d/0x80 fs/block_dev.c:1604 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:1055 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:1055 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 value changed: 0x05 -> 0x0a Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 32098 Comm: syz-executor.4 Tainted: G W 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== loop4: detected capacity change from 0 to 4096 EXT4-fs error (device loop4): ext4_quota_enable:6438: comm syz-executor.4: Bad quota inode # 3 EXT4-fs warning (device loop4): ext4_enable_quotas:6478: Failed to enable quota tracking (type=0, err=-116). Please run e2fsck to fix. EXT4-fs (loop4): mount failed