KCSAN: data-race in binder_dec_node_nilocked / binder_state

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in binder_dec_node_nilocked / binder_state_show kernel				1	1401d	1342d	0/25	auto-closed as invalid on 2020/04/17 15:24
upstream	KCSAN: data-race in binder_dec_node_nilocked / binder_state_show (2) kernel				3	1273d	1308d	0/25	closed as invalid on 2020/06/18 14:24

================================================================== BUG: KCSAN: data-race in binder_dec_node_nilocked / binder_state_show write to 0xffff88812240bb54 of 4 bytes by task 11925 on cpu 1: binder_state_show+0xae/0x300 drivers/android/binder.c:5949 seq_read+0x2ee/0x900 fs/seq_file.c:208 full_proxy_read+0xaf/0x140 fs/debugfs/file.c:229 do_loop_readv_writev fs/read_write.c:715 [inline] do_iter_read+0x3f5/0x480 fs/read_write.c:936 vfs_readv fs/read_write.c:1054 [inline] do_preadv+0x13b/0x230 fs/read_write.c:1146 __do_sys_preadv fs/read_write.c:1196 [inline] __se_sys_preadv fs/read_write.c:1191 [inline] __x64_sys_preadv+0x54/0x60 fs/read_write.c:1191 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812240bb54 of 4 bytes by task 11922 on cpu 0: binder_dec_node_nilocked+0x178/0x680 drivers/android/binder.c:1261 binder_dec_node_tmpref+0x18e/0x350 drivers/android/binder.c:1379 binder_put_node drivers/android/binder.c:1387 [inline] binder_state_show+0x277/0x300 drivers/android/binder.c:5961 seq_read+0x2ee/0x900 fs/seq_file.c:208 full_proxy_read+0xaf/0x140 fs/debugfs/file.c:229 do_loop_readv_writev fs/read_write.c:715 [inline] do_iter_read+0x3f5/0x480 fs/read_write.c:936 vfs_readv fs/read_write.c:1054 [inline] do_preadv+0x13b/0x230 fs/read_write.c:1146 __do_sys_preadv fs/read_write.c:1196 [inline] __se_sys_preadv fs/read_write.c:1191 [inline] __x64_sys_preadv+0x54/0x60 fs/read_write.c:1191 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11922 Comm: syz-executor.2 Not tainted 5.8.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================