syzbot

==================================================================
BUG: KCSAN: data-race in ext4_mark_iloc_dirty / ext4_mark_iloc_dirty

write to 0xffff8881220d8628 of 4 bytes by task 11295 on cpu 0:
 ext4_update_inode_fsync_trans fs/ext4/ext4_jbd2.h:445 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5162 [inline]
 ext4_mark_iloc_dirty+0x75d/0x860 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x452/0x610 fs/ext4/inode.c:5920
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5949
 __mark_inode_dirty+0x70/0x5f0 fs/fs-writeback.c:2367
 generic_update_time fs/inode.c:1856 [inline]
 inode_update_time+0x1b3/0x1d0 fs/inode.c:1869
 file_update_time+0x1f3/0x230 fs/inode.c:2086
 file_modified+0x62/0x80 fs/inode.c:2109
 ext4_write_checks fs/ext4/file.c:249 [inline]
 ext4_buffered_write_iter+0x1d8/0x330 fs/ext4/file.c:265
 ext4_file_write_iter+0x2e3/0x1210
 do_iter_readv_writev+0x27b/0x300
 do_iter_write+0x16f/0x5c0 fs/read_write.c:852
 vfs_iter_write+0x4c/0x70 fs/read_write.c:893
 iter_file_splice_write+0x44a/0x7c0 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x660 fs/splice.c:891
 do_splice_direct+0xfb/0x180 fs/splice.c:979
 do_sendfile+0x3ad/0x900 fs/read_write.c:1246
 __do_sys_sendfile64 fs/read_write.c:1305 [inline]
 __se_sys_sendfile64 fs/read_write.c:1297 [inline]
 __x64_sys_sendfile64+0xb9/0x150 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff8881220d8628 of 4 bytes by task 11290 on cpu 1:
 ext4_update_inode_fsync_trans fs/ext4/ext4_jbd2.h:445 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5162 [inline]
 ext4_mark_iloc_dirty+0x75d/0x860 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x452/0x610 fs/ext4/inode.c:5920
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5949
 __mark_inode_dirty+0x70/0x5f0 fs/fs-writeback.c:2367
 generic_update_time fs/inode.c:1856 [inline]
 inode_update_time fs/inode.c:1869 [inline]
 touch_atime+0x1c4/0x2e0 fs/inode.c:1941
 file_accessed include/linux/fs.h:2378 [inline]
 filemap_read+0x137e/0x1400 mm/filemap.c:2747
 generic_file_read_iter+0x72/0x320 mm/filemap.c:2825
 ext4_file_read_iter+0x1e9/0x2a0
 call_read_iter include/linux/fs.h:2044 [inline]
 generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870
 do_splice_direct+0xfb/0x180 fs/splice.c:979
 do_sendfile+0x3ad/0x900 fs/read_write.c:1246
 __do_sys_sendfile64 fs/read_write.c:1305 [inline]
 __se_sys_sendfile64 fs/read_write.c:1297 [inline]
 __x64_sys_sendfile64+0xb9/0x150 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000009d7 -> 0x000009d9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11290 Comm: syz-executor.0 Not tainted 5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================