================================================================== BUG: KCSAN: data-race in __filemap_add_folio / nr_blockdev_pages write to 0xffff88810042e6f8 of 8 bytes by task 1403 on cpu 1: __filemap_add_folio+0x256/0x4d0 mm/filemap.c:946 filemap_add_folio+0x6b/0x150 mm/filemap.c:999 __filemap_get_folio+0x4c4/0x690 mm/filemap.c:1962 pagecache_get_page+0x26/0xe0 mm/folio-compat.c:125 find_or_create_page include/linux/pagemap.h:489 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x189/0x530 fs/buffer.c:1334 __getblk include/linux/buffer_head.h:382 [inline] jbd2_journal_get_descriptor_buffer+0xa6/0x1d0 fs/jbd2/journal.c:1014 journal_submit_commit_record+0x80/0x4b0 fs/jbd2/commit.c:131 jbd2_journal_commit_transaction+0x1fe9/0x3460 fs/jbd2/commit.c:925 kjournald2+0x263/0x480 fs/jbd2/journal.c:213 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 read to 0xffff88810042e6f8 of 8 bytes by task 5 on cpu 0: nr_blockdev_pages+0x7f/0xd0 block/bdev.c:522 si_meminfo+0x3a/0x60 mm/page_alloc.c:5778 update_defense_level+0x46/0x560 net/netfilter/ipvs/ip_vs_ctl.c:102 defense_work_handler+0x1b/0x80 net/netfilter/ipvs/ip_vs_ctl.c:236 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298 worker_thread+0x616/0xa70 kernel/workqueue.c:2445 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 value changed: 0x00000000000020b7 -> 0x00000000000020b8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_long defense_work_handler ==================================================================