KCSAN: data-race in __add_to_page_cache_locked / truncate_inode_pages

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __add_to_page_cache_locked / truncate_inode_pages_range ext4	6				5	1898d	2067d	0/29	closed as invalid on 2020/06/18 14:24
upstream	KCSAN: data-race in __add_to_page_cache_locked / truncate_inode_pages_range (3) mm fs	6				9	1560d	1616d	0/29	auto-closed as invalid on 2021/06/07 17:05

================================================================== BUG: KCSAN: data-race in __add_to_page_cache_locked / truncate_inode_pages_range write to 0xffff88811eddcb40 of 8 bytes by task 15168 on cpu 0: __add_to_page_cache_locked+0x2cc/0x6e0 mm/filemap.c:867 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:918 page_cache_readahead_unbounded+0x234/0x440 mm/readahead.c:228 ondemand_readahead+0x4e4/0x6e0 mm/readahead.c:273 page_cache_async_readahead+0x1c6/0x1e0 mm/readahead.c:631 generic_file_buffered_read+0x322/0x1800 mm/filemap.c:2041 generic_file_read_iter+0x7d/0x3e0 mm/filemap.c:2307 ext4_file_read_iter+0x2d6/0x420 fs/ext4/file.c:74 call_read_iter include/linux/fs.h:1901 [inline] new_sync_read fs/read_write.c:415 [inline] __vfs_read+0x2d5/0x330 fs/read_write.c:428 vfs_read+0x131/0x2a0 fs/read_write.c:462 ksys_read+0xce/0x180 fs/read_write.c:588 __do_sys_read fs/read_write.c:598 [inline] __se_sys_read fs/read_write.c:596 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:596 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88811eddcb40 of 8 bytes by task 15178 on cpu 1: truncate_inode_pages_range+0x40/0xf10 mm/truncate.c:303 truncate_pagecache_range+0x80/0x90 mm/truncate.c:931 ext4_punch_hole+0x371/0xa20 fs/ext4/inode.c:4031 ext4_fallocate+0xe5/0x560 fs/ext4/extents.c:4659 vfs_fallocate+0x431/0x580 fs/open.c:309 madvise_remove mm/madvise.c:857 [inline] madvise_vma mm/madvise.c:940 [inline] do_madvise+0x83d/0x14e0 mm/madvise.c:1145 __do_sys_madvise mm/madvise.c:1171 [inline] __se_sys_madvise mm/madvise.c:1169 [inline] __x64_sys_madvise+0x3e/0x50 mm/madvise.c:1169 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15178 Comm: syz-executor.0 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================