KCSAN: data-race in p9_conn_cancel / p9_poll

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (4) v9fs	1	41d	41d	0/26	auto-obsoleted due to no activity on 2024/05/02 19:52
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (5) v9fs	1	5d16h	5d16h	0/26	moderation: reported on 2024/05/04 01:35
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (3) v9fs	1	231d	231d	0/26	auto-obsoleted due to no activity on 2023/10/26 00:39
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn v9fs	1	985d	985d	0/26	auto-closed as invalid on 2021/10/01 19:17

================================================================== BUG: KCSAN: data-race in p9_conn_cancel / p9_poll_workfn write to 0xffff88813b00a428 of 4 bytes by task 9 on cpu 0: p9_conn_cancel+0x89/0x400 net/9p/trans_fd.c:200 p9_write_work+0x3ac/0x740 net/9p/trans_fd.c:523 process_one_work+0x434/0x860 kernel/workqueue.c:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 read to 0xffff88813b00a428 of 4 bytes by task 20715 on cpu 1: p9_poll_mux net/9p/trans_fd.c:626 [inline] p9_poll_workfn+0xc0/0x410 net/9p/trans_fd.c:1167 process_one_work+0x434/0x860 kernel/workqueue.c:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 value changed: 0x00000000 -> 0xffffff91 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20715 Comm: kworker/1:1 Not tainted 6.5.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: events p9_poll_workfn ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/07/24 09:35	upstream	6eaae1980760	b03242d7	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn

Crashes (1):