KCSAN: data-race in __tty_hangup / n_tty

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __tty_hangup / n_tty_poll (3) serial	6				1	460d	460d	0/29	auto-obsoleted due to no activity on 2024/10/08 23:58
upstream	KCSAN: data-race in __tty_hangup / n_tty_poll serial	6				1	2003d	2003d	0/29	closed as invalid on 2020/06/18 14:13

================================================================== BUG: KCSAN: data-race in __tty_hangup / n_tty_poll write to 0xffff888121df55e4 of 2 bytes by task 2112 on cpu 1: __tty_hangup+0x4e9/0x610 drivers/tty/tty_io.c:634 tty_vhangup drivers/tty/tty_io.c:698 [inline] tty_ioctl+0x5a1/0xfd0 drivers/tty/tty_io.c:2597 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888121df55e4 of 2 bytes by task 2104 on cpu 0: n_tty_poll+0x3aa/0x4a0 drivers/tty/n_tty.c:2416 tty_poll+0xa7/0x140 drivers/tty/tty_io.c:2112 vfs_poll include/linux/poll.h:90 [inline] do_pollfd fs/select.c:869 [inline] do_poll fs/select.c:917 [inline] do_sys_poll+0x606/0xbc0 fs/select.c:1011 __do_sys_ppoll fs/select.c:1111 [inline] __se_sys_ppoll+0x169/0x1b0 fs/select.c:1091 __x64_sys_ppoll+0x63/0x70 fs/select.c:1091 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2104 Comm: syz-executor.5 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================