================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff88811e45f404 of 4 bytes by task 1722 on cpu 1: jbd2_journal_dirty_metadata+0x2df/0x670 fs/jbd2/transaction.c:1516 __ext4_handle_dirty_metadata+0xc1/0x5a0 fs/ext4/ext4_jbd2.c:331 ext4_do_update_inode fs/ext4/inode.c:5144 [inline] ext4_mark_iloc_dirty+0x12f2/0x16f0 fs/ext4/inode.c:5725 __ext4_mark_inode_dirty+0x4d6/0x5e0 fs/ext4/inode.c:5919 ext4_dirty_inode+0xa6/0xc0 fs/ext4/inode.c:5955 __mark_inode_dirty+0x72/0x6b0 fs/fs-writeback.c:2262 mark_inode_dirty_sync include/linux/fs.h:2186 [inline] dquot_claim_block include/linux/quotaops.h:364 [inline] ext4_da_update_reserve_space+0x160/0x2e0 fs/ext4/inode.c:380 ext4_ext_map_blocks+0x173b/0x1fd0 fs/ext4/extents.c:4291 ext4_map_blocks+0x726/0xff0 fs/ext4/inode.c:637 mpage_map_one_extent+0x10d/0x3a0 fs/ext4/inode.c:2396 mpage_map_and_submit_extent fs/ext4/inode.c:2449 [inline] ext4_writepages+0xa51/0x1e70 fs/ext4/inode.c:2801 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:422 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:761 ext4_sync_file+0x105/0x6e0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2737 [inline] ext4_buffered_write_iter+0x38f/0x3e0 fs/ext4/file.c:278 ext4_file_write_iter+0x47a/0x1060 fs/ext4/file.c:503 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x41a/0x770 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:933 splice_direct_to_actor+0x345/0x650 fs/splice.c:888 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x5e0/0xcf0 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1312 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88811e45f404 of 4 bytes by task 1732 on cpu 0: jbd2_journal_dirty_metadata+0x15e/0x670 fs/jbd2/transaction.c:1484 __ext4_handle_dirty_metadata+0xc1/0x5a0 fs/ext4/ext4_jbd2.c:331 ext4_do_update_inode fs/ext4/inode.c:5144 [inline] ext4_mark_iloc_dirty+0x12f2/0x16f0 fs/ext4/inode.c:5725 __ext4_mark_inode_dirty+0x4d6/0x5e0 fs/ext4/inode.c:5919 ext4_dirty_inode+0xa6/0xc0 fs/ext4/inode.c:5955 __mark_inode_dirty+0x72/0x6b0 fs/fs-writeback.c:2262 generic_update_time fs/inode.c:1763 [inline] update_time fs/inode.c:1776 [inline] touch_atime+0x1b1/0x2d0 fs/inode.c:1847 file_accessed include/linux/fs.h:2218 [inline] generic_file_buffered_read+0x945/0x9c0 mm/filemap.c:2552 generic_file_read_iter+0x82/0x3e0 mm/filemap.c:2633 ext4_file_read_iter+0x2e0/0x430 fs/ext4/file.c:74 call_read_iter include/linux/fs.h:1895 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:788 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:867 do_splice_direct+0xf5/0x170 fs/splice.c:976 do_sendfile+0x5e0/0xcf0 fs/read_write.c:1257 __do_sys_sendfile64 fs/read_write.c:1318 [inline] __se_sys_sendfile64 fs/read_write.c:1304 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1304 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1732 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================