================================================================== BUG: KCSAN: data-race in ext4_itable_unused_count / ext4_itable_unused_set write to 0xffff8881025e505c of 2 bytes by task 26354 on cpu 0: ext4_itable_unused_set+0x1b/0x80 fs/ext4/super.c:403 __ext4_new_inode+0x1b2c/0x2f70 fs/ext4/ialloc.c:1203 ext4_symlink+0x2c3/0x700 fs/ext4/namei.c:3465 vfs_symlink+0x23a/0x300 fs/namei.c:4172 do_symlinkat+0xeb/0x280 fs/namei.c:4202 __do_sys_symlink fs/namei.c:4223 [inline] __se_sys_symlink fs/namei.c:4221 [inline] __x64_sys_symlink+0x32/0x40 fs/namei.c:4221 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881025e505c of 2 bytes by task 26352 on cpu 1: ext4_itable_unused_count+0x18/0x80 fs/ext4/super.c:347 __ext4_get_inode_loc+0x608/0x920 fs/ext4/inode.c:4404 ext4_get_inode_loc fs/ext4/inode.c:4456 [inline] ext4_reserve_inode_write+0xb8/0x1f0 fs/ext4/inode.c:5743 ext4_xattr_set_handle+0x36f/0x1110 fs/ext4/xattr.c:2336 ext4_initxattrs+0x66/0xb0 fs/ext4/xattr_security.c:44 security_inode_init_security+0x1a9/0x260 security/security.c:1098 ext4_init_security+0x30/0x40 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x29a1/0x2f70 fs/ext4/ialloc.c:1321 ext4_symlink+0x2c3/0x700 fs/ext4/namei.c:3465 vfs_symlink+0x23a/0x300 fs/namei.c:4172 do_symlinkat+0xeb/0x280 fs/namei.c:4202 __do_sys_symlink fs/namei.c:4223 [inline] __se_sys_symlink fs/namei.c:4221 [inline] __x64_sys_symlink+0x32/0x40 fs/namei.c:4221 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x020e -> 0x020d Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 26352 Comm: syz-executor.5 Not tainted 5.13.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================