KCSAN: data-race in p9_conn_cancel / p9_poll

Title	Replies (including bot)	Last reply
[PATCH v3] 9p/trans_fd: mark concurrent read and writes to p9_conn->err	2 (2)	2025/03/18 22:01
[PATCH v2] 9p/trans_fd: mark concurrent read and writes to p9_conn->err	3 (3)	2025/03/17 17:01
[PATCH] 9p/trans_fd: mark concurrent read and writes to p9_conn->err	3 (3)	2025/03/09 07:35
[syzbot] [v9fs?] KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (9)	0 (1)	2025/02/07 13:31

Title

Replies (including bot)

Last reply

2 (2)

2025/03/18 22:01

3 (3)

2025/03/17 17:01

3 (3)

2025/03/09 07:35

0 (1)

2025/02/07 13:31

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (4) v9fs	1	364d	364d	0/28	auto-obsoleted due to no activity on 2024/05/02 19:52
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (7) v9fs	2	194d	209d	0/28	auto-obsoleted due to no activity on 2024/10/19 18:15
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (2) v9fs	1	613d	613d	0/28	auto-obsoleted due to no activity on 2023/08/28 09:43
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (5) v9fs	1	328d	328d	0/28	auto-obsoleted due to no activity on 2024/06/08 01:35
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (6) v9fs	1	284d	284d	0/28	auto-obsoleted due to no activity on 2024/07/22 12:28
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (3) v9fs	1	554d	554d	0/28	auto-obsoleted due to no activity on 2023/10/26 00:39
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn (8) v9fs	1	123d	123d	0/28	auto-obsoleted due to no activity on 2025/01/20 09:01
upstream	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn v9fs	1	1308d	1308d	0/28	auto-closed as invalid on 2021/10/01 19:17

================================================================== BUG: KCSAN: data-race in p9_conn_cancel / p9_poll_workfn write to 0xffff88811880be28 of 4 bytes by task 13649 on cpu 1: p9_conn_cancel+0x89/0x400 net/9p/trans_fd.c:199 p9_write_work+0x3ac/0x750 net/9p/trans_fd.c:522 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x4db/0xa20 kernel/workqueue.c:3319 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3400 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff88811880be28 of 4 bytes by task 3368 on cpu 0: p9_poll_mux net/9p/trans_fd.c:625 [inline] p9_poll_workfn+0xc0/0x410 net/9p/trans_fd.c:1177 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0x4db/0xa20 kernel/workqueue.c:3319 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3400 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000 -> 0xffffffe0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3368 Comm: kworker/0:2 Tainted: G W 6.14.0-rc7-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events p9_poll_workfn ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/03/17 20:43	upstream	4701f33a1070	ce3352cd	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-kcsan-gce	KCSAN: data-race in p9_conn_cancel / p9_poll_workfn
2025/02/07 02:22	upstream	bb066fe812d6	8002dd28	.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 (2):