================================================================== BUG: KCSAN: data-race in _find_next_bit / ext4_free_inode write to 0xffff888104b1a378 of 8 bytes by task 1118 on cpu 1: instrument_write include/linux/instrumented.h:42 [inline] __instrument_read_write_bitop include/asm-generic/bitops/instrumented-non-atomic.h:79 [inline] __test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:109 [inline] __test_and_clear_bit_le include/asm-generic/bitops/le.h:125 [inline] ext4_free_inode+0x5ed/0xa80 fs/ext4/ialloc.c:316 ext4_evict_inode+0xb7e/0xdb0 fs/ext4/inode.c:332 evict+0x1c8/0x3c0 fs/inode.c:588 iput_final fs/inode.c:1664 [inline] iput+0x430/0x580 fs/inode.c:1690 do_unlinkat+0x2d4/0x540 fs/namei.c:4176 __do_sys_unlink fs/namei.c:4217 [inline] __se_sys_unlink fs/namei.c:4215 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:4215 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888104b1a378 of 8 bytes by task 8373 on cpu 0: _find_next_bit+0x4f/0x190 lib/find_bit.c:41 find_next_zero_bit include/asm-generic/bitops/find.h:94 [inline] find_next_zero_bit_le include/asm-generic/bitops/le.h:17 [inline] find_inode_bit+0xc8/0x330 fs/ext4/ialloc.c:725 __ext4_new_inode+0xc9a/0x2fd0 fs/ext4/ialloc.c:1066 ext4_symlink+0x2cc/0x700 fs/ext4/namei.c:3293 vfs_symlink+0x23f/0x350 fs/namei.c:4250 do_symlinkat+0x104/0x380 fs/namei.c:4279 __do_sys_symlink fs/namei.c:4301 [inline] __se_sys_symlink fs/namei.c:4299 [inline] __x64_sys_symlink+0x52/0x60 fs/namei.c:4299 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000000001 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8373 Comm: syz-executor.1 Tainted: G W 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================