KCSAN: data-race in __delete_from_page_cache / invalidate_inode_pages2

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __delete_from_page_cache / invalidate_inode_pages2_range iomap				9	1524d	1563d	0/26	auto-closed as invalid on 2020/05/01 15:10

================================================================== BUG: KCSAN: data-race in __delete_from_page_cache / invalidate_inode_pages2_range write to 0xffff8881262a5740 of 8 bytes by task 26416 on cpu 0: page_cache_delete mm/filemap.c:154 [inline] __delete_from_page_cache+0x293/0x390 mm/filemap.c:239 invalidate_complete_page2+0x126/0x2a0 mm/truncate.c:651 invalidate_inode_pages2_range+0x465/0x780 mm/truncate.c:744 iomap_dio_rw+0x503/0x980 fs/iomap/direct-io.c:488 ext4_dio_write_iter fs/ext4/file.c:545 [inline] ext4_file_write_iter+0xd71/0x1000 fs/ext4/file.c:655 call_write_iter include/linux/fs.h:1882 [inline] do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713 do_iter_write+0x112/0x4b0 fs/read_write.c:1018 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881262a5740 of 8 bytes by task 26417 on cpu 1: invalidate_inode_pages2_range+0x40/0x780 mm/truncate.c:695 iomap_dio_rw+0x503/0x980 fs/iomap/direct-io.c:488 ext4_dio_write_iter fs/ext4/file.c:545 [inline] ext4_file_write_iter+0xd71/0x1000 fs/ext4/file.c:655 call_write_iter include/linux/fs.h:1882 [inline] do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713 do_iter_write+0x112/0x4b0 fs/read_write.c:1018 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059 iter_file_splice_write+0x41a/0x770 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1016 splice_direct_to_actor+0x365/0x660 fs/splice.c:971 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 26417 Comm: syz-executor.3 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================