================================================================== BUG: KCSAN: data-race in ext4_free_inode / find_next_zero_bit write to 0xffff88812310d028 of 8 bytes by task 7275 on cpu 0: __test_and_clear_bit include/asm-generic/bitops-instrumented.h:213 [inline] __test_and_clear_bit_le include/asm-generic/bitops/le.h:95 [inline] ext4_free_inode+0x5f1/0xaa0 fs/ext4/ialloc.c:313 ext4_evict_inode+0x9a9/0xdb0 fs/ext4/inode.c:333 evict+0x244/0x410 fs/inode.c:574 iput_final fs/inode.c:1563 [inline] iput+0x371/0x4e0 fs/inode.c:1589 do_unlinkat+0x378/0x530 fs/namei.c:4061 __do_sys_unlink fs/namei.c:4102 [inline] __se_sys_unlink fs/namei.c:4100 [inline] __x64_sys_unlink+0x3b/0x50 fs/namei.c:4100 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812310d028 of 8 bytes by task 9703 on cpu 1: _find_next_bit lib/find_bit.c:39 [inline] find_next_zero_bit+0x4e/0xe0 lib/find_bit.c:79 find_next_zero_bit_le include/asm-generic/bitops/le.h:15 [inline] find_inode_bit.isra.0+0x82/0x300 fs/ext4/ialloc.c:715 __ext4_new_inode+0xd4b/0x3070 fs/ext4/ialloc.c:914 ext4_symlink+0x30e/0x970 fs/ext4/namei.c:3262 vfs_symlink fs/namei.c:4119 [inline] vfs_symlink+0x218/0x310 fs/namei.c:4105 do_symlinkat+0x1a5/0x1e0 fs/namei.c:4146 __do_sys_symlink fs/namei.c:4165 [inline] __se_sys_symlink fs/namei.c:4163 [inline] __x64_sys_symlink+0x3f/0x50 fs/namei.c:4163 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 9703 Comm: syz-executor.2 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================