================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty write to 0xffff88810dbc7c98 of 8 bytes by task 17335 on cpu 1: __mark_inode_dirty+0x209/0x6b0 fs/fs-writeback.c:2290 mark_inode_dirty include/linux/fs.h:2181 [inline] dquot_alloc_space include/linux/quotaops.h:317 [inline] dquot_alloc_block include/linux/quotaops.h:334 [inline] ext4_mb_new_blocks+0xc7b/0x1140 fs/ext4/mballoc.c:4937 ext4_ext_map_blocks+0x15a0/0x1fc0 fs/ext4/extents.c:4238 ext4_map_blocks+0x700/0xfc0 fs/ext4/inode.c:637 ext4_iomap_alloc fs/ext4/inode.c:3427 [inline] ext4_iomap_begin+0x513/0x6a0 fs/ext4/inode.c:3477 iomap_apply+0x8d/0x4a0 fs/iomap/apply.c:46 __iomap_dio_rw+0x448/0x9b0 fs/iomap/direct-io.c:517 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:605 ext4_dio_write_iter fs/ext4/file.c:552 [inline] ext4_file_write_iter+0xe06/0x1090 fs/ext4/file.c:662 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4b0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x42a/0x780 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+0x5db/0xca0 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 read to 0xffff88810dbc7c98 of 8 bytes by task 17347 on cpu 0: __mark_inode_dirty+0xb4/0x6b0 fs/fs-writeback.c:2274 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+0x92b/0x9a0 mm/filemap.c:2552 generic_file_read_iter+0x80/0x3d0 mm/filemap.c:2633 ext4_file_read_iter+0x2d0/0x420 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+0x5db/0xca0 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: 17347 Comm: syz-executor.4 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================