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BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata

write to 0xffff88810db5ab74 of 4 bytes by task 15772 on cpu 0:
 jbd2_journal_dirty_metadata+0x2df/0x670 syzkaller/managers/upstream-kcsan-gce/kernel/fs/jbd2/transaction.c:1516
 __ext4_handle_dirty_metadata+0xc1/0x5a0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/ext4_jbd2.c:331
 ext4_do_update_inode syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5144 [inline]
 ext4_mark_iloc_dirty+0x12f2/0x16f0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5725
 __ext4_mark_inode_dirty+0x4d6/0x5e0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5919
 ext4_dirty_inode+0xa6/0xc0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5955
 __mark_inode_dirty+0x72/0x6b0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/fs-writeback.c:2262
 generic_update_time syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1763 [inline]
 update_time syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1776 [inline]
 touch_atime+0x1b1/0x2d0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1847
 file_accessed syzkaller/managers/upstream-kcsan-gce/kernel/./include/linux/fs.h:2218 [inline]
 generic_file_buffered_read+0x945/0x9c0 syzkaller/managers/upstream-kcsan-gce/kernel/mm/filemap.c:2556
 generic_file_read_iter+0x82/0x3e0 syzkaller/managers/upstream-kcsan-gce/kernel/mm/filemap.c:2637
 ext4_file_read_iter+0x2e0/0x430 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/file.c:74
 call_read_iter syzkaller/managers/upstream-kcsan-gce/kernel/./include/linux/fs.h:1895 [inline]
 generic_file_splice_read+0x22a/0x310 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:311
 do_splice_to syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:788 [inline]
 splice_direct_to_actor+0x2aa/0x650 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:867
 do_splice_direct+0xf5/0x170 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:976
 do_sendfile+0x5e0/0xcf0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1257
 __do_sys_sendfile64 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0xf2/0x130 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1304
 do_syscall_64+0x39/0x80 syzkaller/managers/upstream-kcsan-gce/kernel/arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88810db5ab74 of 4 bytes by task 15787 on cpu 1:
 jbd2_journal_dirty_metadata+0x15e/0x670 syzkaller/managers/upstream-kcsan-gce/kernel/fs/jbd2/transaction.c:1484
 __ext4_handle_dirty_metadata+0xc1/0x5a0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/ext4_jbd2.c:331
 ext4_do_update_inode syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5144 [inline]
 ext4_mark_iloc_dirty+0x12f2/0x16f0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5725
 __ext4_mark_inode_dirty+0x4d6/0x5e0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5919
 ext4_dirty_inode+0xa6/0xc0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/inode.c:5955
 __mark_inode_dirty+0x72/0x6b0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/fs-writeback.c:2262
 generic_update_time syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1763 [inline]
 update_time syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1776 [inline]
 touch_atime+0x1b1/0x2d0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/inode.c:1847
 file_accessed syzkaller/managers/upstream-kcsan-gce/kernel/./include/linux/fs.h:2218 [inline]
 generic_file_buffered_read+0x945/0x9c0 syzkaller/managers/upstream-kcsan-gce/kernel/mm/filemap.c:2556
 generic_file_read_iter+0x82/0x3e0 syzkaller/managers/upstream-kcsan-gce/kernel/mm/filemap.c:2637
 ext4_file_read_iter+0x2e0/0x430 syzkaller/managers/upstream-kcsan-gce/kernel/fs/ext4/file.c:74
 call_read_iter syzkaller/managers/upstream-kcsan-gce/kernel/./include/linux/fs.h:1895 [inline]
 generic_file_splice_read+0x22a/0x310 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:311
 do_splice_to syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:788 [inline]
 splice_direct_to_actor+0x2aa/0x650 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:867
 do_splice_direct+0xf5/0x170 syzkaller/managers/upstream-kcsan-gce/kernel/fs/splice.c:976
 do_sendfile+0x5e0/0xcf0 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1257
 __do_sys_sendfile64 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0xf2/0x130 syzkaller/managers/upstream-kcsan-gce/kernel/fs/read_write.c:1304
 do_syscall_64+0x39/0x80 syzkaller/managers/upstream-kcsan-gce/kernel/arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15787 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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