KCSAN: data-race in uhid_char_read / uhid_char

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in uhid_char_read / uhid_char_read input				1	1900d	1900d	0/28	auto-closed as invalid on 2020/01/24 04:26

================================================================== BUG: KCSAN: data-race in uhid_char_read / uhid_char_read write to 0xffff888107b8117d of 1 bytes by task 24514 on cpu 1: uhid_char_read+0x390/0x3e0 drivers/hid/uhid.c:691 do_loop_readv_writev fs/read_write.c:746 [inline] do_iter_read+0x370/0x5d0 fs/read_write.c:788 vfs_readv fs/read_write.c:906 [inline] do_readv+0x171/0x2c0 fs/read_write.c:943 __do_sys_readv fs/read_write.c:1034 [inline] __se_sys_readv fs/read_write.c:1031 [inline] __x64_sys_readv+0x41/0x50 fs/read_write.c:1031 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888107b8117d of 1 bytes by task 24513 on cpu 0: uhid_char_read+0x192/0x3e0 drivers/hid/uhid.c:669 do_loop_readv_writev fs/read_write.c:746 [inline] do_iter_read+0x370/0x5d0 fs/read_write.c:788 vfs_readv fs/read_write.c:906 [inline] do_readv+0x171/0x2c0 fs/read_write.c:943 __do_sys_readv fs/read_write.c:1034 [inline] __se_sys_readv fs/read_write.c:1031 [inline] __x64_sys_readv+0x41/0x50 fs/read_write.c:1031 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 24513 Comm: syz-executor.3 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================