syzbot

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BUG: KCSAN: data-race in jbd2_journal_file_inode / jbd2_journal_finish_inode_data_buffers

write to 0xffff8881367547f8 of 8 bytes by task 11983 on cpu 1:
 jbd2_journal_file_inode+0x17a/0x330
 jbd2_journal_inode_ranged_write+0x30/0x40 fs/jbd2/transaction.c:2705
 ext4_jbd2_inode_add_write fs/ext4/ext4_jbd2.h:424 [inline]
 ext4_map_blocks+0xe77/0xfa0 fs/ext4/inode.c:740
 ext4_iomap_alloc fs/ext4/inode.c:3354 [inline]
 ext4_iomap_begin+0x4b0/0x630 fs/ext4/inode.c:3404
 iomap_iter+0x395/0x4a0 fs/iomap/iter.c:74
 __iomap_dio_rw+0xbc4/0x10b0 fs/iomap/direct-io.c:589
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:680
 ext4_dio_write_iter fs/ext4/file.c:564 [inline]
 ext4_file_write_iter+0xab3/0x11f0 fs/ext4/file.c:675
 call_write_iter include/linux/fs.h:2074 [inline]
 do_iter_readv_writev+0x2de/0x380 fs/read_write.c:725
 do_iter_write+0x192/0x5c0 fs/read_write.c:851
 vfs_iter_write+0x4c/0x70 fs/read_write.c:892
 iter_file_splice_write+0x43a/0x790 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+0x345/0x650 fs/splice.c:891
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881367547f8 of 8 bytes by task 1403 on cpu 0:
 jbd2_journal_finish_inode_data_buffers+0x3d/0x60 fs/jbd2/commit.c:276
 ext4_journal_finish_inode_data_buffers+0x41/0x60 fs/ext4/super.c:559
 journal_finish_inode_data_buffers fs/jbd2/commit.c:299 [inline]
 jbd2_journal_commit_transaction+0x16a8/0x3460 fs/jbd2/commit.c:786
 kjournald2+0x263/0x480 fs/jbd2/journal.c:213
 kthread+0x1bf/0x1e0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30

value changed: 0x00000000000d9fff -> 0x00000000000dafff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1403 Comm: jbd2/sda1-8 Not tainted 5.17.0-rc2-syzkaller-00060-g88808fbbead4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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