================================================================== BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes write to 0xffff888136685be0 of 8 bytes by task 19596 on cpu 1: writeback_sb_inodes+0x494/0xdd0 fs/fs-writeback.c:1854 wb_writeback+0x26b/0x650 fs/fs-writeback.c:2039 wb_do_writeback+0x101/0x600 fs/fs-writeback.c:2182 wb_workfn+0x88/0x260 fs/fs-writeback.c:2222 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888136685be0 of 8 bytes by task 19612 on cpu 0: __mark_inode_dirty+0xd5/0x620 fs/fs-writeback.c:2402 mark_inode_dirty include/linux/fs.h:2332 [inline] dquot_alloc_space include/linux/quotaops.h:317 [inline] dquot_alloc_block include/linux/quotaops.h:334 [inline] ext4_mb_new_blocks+0xce3/0xfd0 fs/ext4/mballoc.c:5599 ext4_ext_map_blocks+0xd55/0x1bb0 fs/ext4/extents.c:4281 ext4_map_blocks+0x72d/0x1040 fs/ext4/inode.c:643 ext4_alloc_file_blocks+0x281/0x730 fs/ext4/extents.c:4466 ext4_fallocate+0x349/0x440 fs/ext4/extents.c:4753 vfs_fallocate+0x355/0x3d0 fs/open.c:323 do_vfs_ioctl+0x12d9/0x1390 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x140 fs/ioctl.c:856 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 value changed: 0x0000000000020007 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 19612 Comm: syz-executor.5 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================