KCSAN: data-race in ext4_mark_iloc_dirty / ext4

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in ext4_mark_iloc_dirty / ext4_setattr ext4				1	1913d	1913d	0/28	closed as invalid on 2019/11/19 13:24
upstream	KCSAN: data-race in ext4_mark_iloc_dirty / ext4_setattr (3) ext4				1	1365d	1365d	0/28	auto-closed as invalid on 2021/06/08 14:53

================================================================== BUG: KCSAN: data-race in ext4_mark_iloc_dirty / ext4_setattr write to 0xffff8880bb4e96d0 of 8 bytes by task 12333 on cpu 0: ext4_setattr+0xb2b/0x1320 fs/ext4/inode.c:5355 notify_change+0x82b/0xad0 fs/attr.c:336 do_truncate+0xf9/0x180 fs/open.c:64 handle_truncate fs/namei.c:2887 [inline] do_open fs/namei.c:3233 [inline] path_openat+0x1e51/0x23d0 fs/namei.c:3346 do_filp_open+0x11e/0x1b0 fs/namei.c:3373 do_sys_openat2+0x52e/0x680 fs/open.c:1148 do_sys_open+0xa2/0x110 fs/open.c:1164 ksys_open include/linux/syscalls.h:1386 [inline] __do_sys_creat fs/open.c:1232 [inline] __se_sys_creat fs/open.c:1230 [inline] __x64_sys_creat+0x42/0x60 fs/open.c:1230 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880bb4e96d0 of 8 bytes by task 12331 on cpu 1: ext4_isize fs/ext4/ext4.h:2999 [inline] ext4_do_update_inode fs/ext4/inode.c:4999 [inline] ext4_mark_iloc_dirty+0x8c1/0x1580 fs/ext4/inode.c:5603 ext4_mark_inode_dirty+0xe6/0x420 fs/ext4/inode.c:5796 ext4_dirty_inode+0xad/0xd0 fs/ext4/inode.c:5827 __mark_inode_dirty+0x5b7/0x940 fs/fs-writeback.c:2258 generic_update_time+0x184/0x270 fs/inode.c:1682 update_time+0x7d/0x90 fs/inode.c:1695 touch_atime+0x13f/0x150 fs/inode.c:1766 file_accessed include/linux/fs.h:2226 [inline] ext4_dio_read_iter fs/ext4/file.c:81 [inline] ext4_file_read_iter fs/ext4/file.c:129 [inline] ext4_file_read_iter+0x206/0x360 fs/ext4/file.c:114 call_read_iter include/linux/fs.h:1901 [inline] generic_file_splice_read+0x2df/0x470 fs/splice.c:313 do_splice_to+0xc7/0x100 fs/splice.c:892 splice_direct_to_actor+0x1b9/0x540 fs/splice.c:971 do_splice_direct+0x152/0x1d0 fs/splice.c:1080 do_sendfile+0x380/0x800 fs/read_write.c:1521 __do_sys_sendfile64 fs/read_write.c:1582 [inline] __se_sys_sendfile64 fs/read_write.c:1568 [inline] __x64_sys_sendfile64+0x121/0x140 fs/read_write.c:1568 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12331 Comm: syz-executor.5 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================