KCSAN: data-race in pollwake / pollwake

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in pollwake / pollwake (5) fs	6	524	95d	494d	0/29	auto-obsoleted due to no activity on 2025/09/15 10:53
upstream	KCSAN: data-race in pollwake / pollwake (2) fs	6	2	2112d	2154d	0/29	auto-closed as invalid on 2020/03/29 13:20
upstream	KCSAN: data-race in pollwake / pollwake (4) ext4	6	200	572d	694d	0/29	auto-obsoleted due to no activity on 2024/05/12 07:09
upstream	KCSAN: data-race in pollwake / pollwake (3) fs	6	4	1820d	1789d	0/29	auto-closed as invalid on 2020/12/21 11:54

================================================================== BUG: KCSAN: data-race in pollwake / pollwake write to 0xffffc90001653a40 of 4 bytes by task 7302 on cpu 0: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:196 pipe_write+0x656/0x970 fs/pipe.c:503 call_write_iter include/linux/fs.h:1895 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffffc90001653a40 of 4 bytes by interrupt on cpu 1: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:196 sock_def_readable+0xa9/0x140 net/core/sock.c:2794 tcp_data_ready+0x7d/0xd0 net/ipv4/tcp_input.c:4750 tcp_data_queue+0xc6f/0x20b0 net/ipv4/tcp_input.c:4813 tcp_rcv_established+0x517/0xf50 net/ipv4/tcp_input.c:5705 tcp_v4_do_rcv+0x381/0x4e0 net/ipv4/tcp_ipv4.c:1561 tcp_v4_rcv+0x19dc/0x1bb0 net/ipv4/tcp_ipv4.c:1942 ip_protocol_deliver_rcu+0x4d/0x420 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 7288 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================