EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. ================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / writeback_single_inode write to 0xffff88810a3fc648 of 8 bytes by task 20342 on cpu 0: writeback_single_inode+0x10e/0x4a0 fs/fs-writeback.c:1721 sync_inode_metadata+0x56/0x80 fs/fs-writeback.c:2780 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline] ext4_sync_file+0x319/0x6e0 fs/ext4/fsync.c:161 vfs_fsync_range+0x10b/0x120 fs/sync.c:188 generic_write_sync include/linux/fs.h:2469 [inline] ext4_buffered_write_iter+0x397/0x3e0 fs/ext4/file.c:296 ext4_file_write_iter+0xd7/0x10e0 do_iter_write+0x4ae/0x770 fs/read_write.c:860 vfs_iter_write+0x50/0x70 fs/read_write.c:901 iter_file_splice_write+0x456/0x7d0 fs/splice.c:779 do_splice_from fs/splice.c:857 [inline] direct_splice_actor+0x84/0xa0 fs/splice.c:1023 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:978 do_splice_direct+0x104/0x180 fs/splice.c:1066 do_sendfile+0x3b8/0x950 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88810a3fc648 of 8 bytes by task 20322 on cpu 1: __mark_inode_dirty+0x58/0x7d0 fs/fs-writeback.c:2406 mark_inode_dirty include/linux/fs.h:2144 [inline] dquot_alloc_space include/linux/quotaops.h:320 [inline] dquot_alloc_block include/linux/quotaops.h:337 [inline] ext4_mb_new_blocks+0x1002/0x2100 fs/ext4/mballoc.c:5752 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xb41/0x1460 fs/ext4/indirect.c:635 ext4_map_blocks+0x6d9/0x1050 fs/ext4/inode.c:625 ext4_iomap_alloc fs/ext4/inode.c:3293 [inline] ext4_iomap_begin+0x4a9/0x5d0 fs/ext4/inode.c:3343 iomap_iter+0x401/0x820 fs/iomap/iter.c:91 __iomap_dio_rw+0x75d/0x1100 fs/iomap/direct-io.c:597 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:688 ext4_dio_write_iter fs/ext4/file.c:597 [inline] ext4_file_write_iter+0x9e6/0x10e0 fs/ext4/file.c:708 do_iter_write+0x4ae/0x770 fs/read_write.c:860 vfs_iter_write+0x50/0x70 fs/read_write.c:901 iter_file_splice_write+0x456/0x7d0 fs/splice.c:779 do_splice_from fs/splice.c:857 [inline] direct_splice_actor+0x84/0xa0 fs/splice.c:1023 splice_direct_to_actor+0x2ee/0x5f0 fs/splice.c:978 do_splice_direct+0x104/0x180 fs/splice.c:1066 do_sendfile+0x3b8/0x950 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000000000000005 -> 0x0000000000000080 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20322 Comm: syz-executor.3 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ==================================================================