KCSAN: data-race in activate_page / lru_add_drain

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in activate_page / lru_add_drain_all (3) mm				3	1286d	1323d	0/26	auto-closed as invalid on 2020/11/15 06:43
upstream	KCSAN: data-race in activate_page / lru_add_drain_all mm				2	1553d	1560d	0/26	auto-closed as invalid on 2020/03/28 06:49

XFS (loop1): SB validate failed with error -117. ================================================================== BUG: KCSAN: data-race in activate_page / lru_add_drain_all write to 0xffff88812c0298e0 of 1 bytes by task 12404 on cpu 0: pagevec_add include/linux/pagevec.h:81 [inline] activate_page+0x241/0x370 mm/swap.c:314 mark_page_accessed+0x29f/0x4f0 mm/swap.c:393 generic_file_buffered_read mm/filemap.c:2114 [inline] generic_file_read_iter+0x950/0x1490 mm/filemap.c:2302 blkdev_read_iter+0xae/0xe0 fs/block_dev.c:2039 call_read_iter include/linux/fs.h:1895 [inline] new_sync_read+0x306/0x450 fs/read_write.c:414 __vfs_read+0x9e/0xb0 fs/read_write.c:427 vfs_read fs/read_write.c:461 [inline] vfs_read+0x13e/0x2b0 fs/read_write.c:446 ksys_read+0xc5/0x1a0 fs/read_write.c:587 __do_sys_read fs/read_write.c:597 [inline] __se_sys_read fs/read_write.c:595 [inline] __x64_sys_read+0x49/0x60 fs/read_write.c:595 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812c0298e0 of 1 bytes by task 12372 on cpu 1: need_activate_page_drain mm/swap.c:304 [inline] lru_add_drain_all+0x372/0x3a0 mm/swap.c:751 invalidate_bdev+0x65/0x90 fs/block_dev.c:97 __loop_clr_fd+0x24e/0x710 drivers/block/loop.c:1140 loop_clr_fd drivers/block/loop.c:1237 [inline] lo_ioctl+0x24a/0xc80 drivers/block/loop.c:1606 __blkdev_driver_ioctl block/ioctl.c:321 [inline] blkdev_ioctl+0x1a1/0x420 block/ioctl.c:717 block_ioctl+0x91/0xb0 fs/block_dev.c:1983 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl+0x101/0x150 fs/ioctl.c:763 __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl fs/ioctl.c:770 [inline] __x64_sys_ioctl+0x47/0x60 fs/ioctl.c:770 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12372 Comm: syz-executor.1 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================