KCSAN: data-race in dec_zone_page_state / release

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in dec_zone_page_state / release_pages (2) mm				8	1405d	1513d	0/26	closed as invalid on 2020/06/18 14:24
upstream	KCSAN: data-race in dec_zone_page_state / release_pages (3) mm				43	1242d	1230d	0/26	auto-closed as invalid on 2020/12/30 00:28

protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 ================================================================== BUG: KCSAN: data-race in dec_zone_page_state / release_pages write to 0xffffea000475ed40 of 8 bytes by task 12686 on cpu 0: __clear_bit include/asm-generic/bitops-instrumented.h:76 [inline] __ClearPageLRU include/linux/page-flags.h:320 [inline] release_pages+0x427/0x980 mm/swap.c:828 __pagevec_release+0x53/0x90 mm/swap.c:862 pagevec_release include/linux/pagevec.h:88 [inline] invalidate_mapping_pages+0x741/0x900 mm/truncate.c:620 __generic_file_write_iter+0x365/0x380 mm/filemap.c:3424 generic_file_write_iter+0x28c/0x390 mm/filemap.c:3466 call_write_iter include/linux/fs.h:1895 [inline] do_iter_readv_writev+0x487/0x5b0 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x13b/0x3c0 fs/read_write.c:951 vfs_iter_write+0x5c/0x80 fs/read_write.c:983 iter_file_splice_write+0x4c0/0x7f0 fs/splice.c:746 do_splice_from fs/splice.c:848 [inline] direct_splice_actor+0xa0/0xc0 fs/splice.c:1020 splice_direct_to_actor+0x215/0x510 fs/splice.c:975 do_splice_direct+0x161/0x1e0 fs/splice.c:1063 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1525 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1511 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea000475ed40 of 8 bytes by interrupt on cpu 1: page_zone include/linux/mm.h:1244 [inline] dec_zone_page_state+0x22/0xe0 mm/vmstat.c:533 test_clear_page_writeback+0x332/0x790 mm/page-writeback.c:2757 end_page_writeback+0x9e/0x190 mm/filemap.c:1339 end_buffer_async_write+0x2dc/0x3a0 fs/buffer.c:349 end_bio_bh_io_sync+0x87/0xb0 fs/buffer.c:2978 bio_endio+0x3a8/0x4f0 block/bio.c:1818 req_bio_endio block/blk-core.c:242 [inline] blk_update_request+0x427/0x7b0 block/blk-core.c:1462 blk_mq_end_request+0x3f/0x2b0 block/blk-mq.c:568 lo_complete_rq+0x136/0x1a0 drivers/block/loop.c:485 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================