================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / __pagevec_lru_add write to 0xffff888237d27998 of 1 bytes by task 9223 on cpu 1: pagevec_reinit include/linux/pagevec.h:57 [inline] __pagevec_lru_add+0x243/0x270 mm/swap.c:1076 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:613 lru_add_drain+0x21/0x60 mm/swap.c:717 free_pages_and_swap_cache+0x1d/0x200 mm/swap_state.c:317 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline] tlb_flush_mmu_free mm/mmu_gather.c:243 [inline] tlb_flush_mmu+0x597/0x5f0 mm/mmu_gather.c:250 zap_pte_range+0xe56/0x10e0 mm/memory.c:1441 zap_pmd_range mm/memory.c:1490 [inline] zap_pud_range mm/memory.c:1519 [inline] zap_p4d_range mm/memory.c:1540 [inline] unmap_page_range+0x2dc/0x3d0 mm/memory.c:1561 unmap_single_vma+0x157/0x210 mm/memory.c:1606 unmap_vmas+0xd0/0x180 mm/memory.c:1638 exit_mmap+0x261/0x4b0 mm/mmap.c:3178 __mmput+0x27/0x1b0 kernel/fork.c:1114 mmput+0x3d/0x50 kernel/fork.c:1135 exit_mm+0xdb/0x170 kernel/exit.c:507 do_exit+0x569/0x16a0 kernel/exit.c:793 do_group_exit+0xa5/0x160 kernel/exit.c:935 get_signal+0x8cf/0x15d0 kernel/signal.c:2862 arch_do_signal_or_restart+0x8c/0x2e0 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x113/0x190 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237d27998 of 1 bytes by task 9231 on cpu 0: pagevec_count include/linux/pagevec.h:62 [inline] __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:835 lru_add_drain_all+0xc/0x10 mm/swap.c:857 invalidate_bdev block/bdev.c:87 [inline] __invalidate_device+0x98/0xc0 block/bdev.c:1008 disk_force_media_change+0x112/0x170 block/disk-events.c:310 loop_configure+0x76e/0xf50 drivers/block/loop.c:1018 lo_ioctl+0x633/0x1280 blkdev_ioctl+0x20e/0x440 block/ioctl.c:588 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9231 Comm: syz-executor.0 Not tainted 5.17.0-rc2-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== ext2: Unknown parameter 'obj_type'