================================================================== BUG: KCSAN: data-race in ext4_mark_iloc_dirty / find_inode_bit.isra.0 write to 0xffff88811fd42414 of 4 bytes by task 7080 on cpu 1: ext4_do_update_inode fs/ext4/inode.c:4938 [inline] ext4_mark_iloc_dirty+0x74a/0x1580 fs/ext4/inode.c:5547 ext4_mark_inode_dirty+0xe9/0x420 fs/ext4/inode.c:5740 ext4_ext_tree_init+0x92/0xb0 fs/ext4/extents.c:872 __ext4_new_inode+0x2d94/0x2f10 fs/ext4/ialloc.c:1164 ext4_symlink+0x31c/0x9b0 fs/ext4/namei.c:3275 vfs_symlink fs/namei.c:4131 [inline] vfs_symlink+0x218/0x310 fs/namei.c:4117 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4158 __do_sys_symlink fs/namei.c:4177 [inline] __se_sys_symlink fs/namei.c:4175 [inline] __x64_sys_symlink+0x3f/0x50 fs/namei.c:4175 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88811fd42414 of 4 bytes by task 7081 on cpu 0: recently_deleted fs/ext4/ialloc.c:693 [inline] find_inode_bit.isra.0+0x1d8/0x300 fs/ext4/ialloc.c:717 __ext4_new_inode+0xd45/0x2f10 fs/ext4/ialloc.c:909 ext4_symlink+0x31c/0x9b0 fs/ext4/namei.c:3275 vfs_symlink fs/namei.c:4131 [inline] vfs_symlink+0x218/0x310 fs/namei.c:4117 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4158 __do_sys_symlink fs/namei.c:4177 [inline] __se_sys_symlink fs/namei.c:4175 [inline] __x64_sys_symlink+0x3f/0x50 fs/namei.c:4175 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7081 Comm: syz-executor.4 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================