Ignacio Encinas 18296b5951 9p/trans_fd: mark concurrent read and writes to p9_conn->err ... [ Upstream commit fbc0283fbe ] Writes for the error value of a connection are spinlock-protected inside p9_conn_cancel, but lockless reads are present elsewhere to avoid performing unnecessary work after an error has been met. Mark the write and lockless reads to make KCSAN happy. Mark the write as exclusive following the recommendation in "Lock-Protected Writes with Lockless Reads" in tools/memory-model/Documentation/access-marking.txt while we are at it. Mark p9_fd_request and p9_conn_cancel m->err reads despite the fact that they do not race with concurrent writes for stylistic reasons. Reported-by: syzbot+d69a7cc8c683c2cb7506@syzkaller.appspotmail.com Reported-by: syzbot+483d6c9b9231ea7e1851@syzkaller.appspotmail.com Signed-off-by: Ignacio Encinas <ignacio@iencinas.com> Message-ID: <20250318-p9_conn_err_benign_data_race-v3-1-290bb18335cc@iencinas.com> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-05-02 07:59:20 +02:00
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client.c	9p/net: fix improper handling of bogus negative read/write replies	2025-05-02 07:59:20 +02:00
error.c	9p: fix a bunch of checkpatch warnings	2021-11-04 21:04:25 +09:00
Kconfig	net/9p/usbg: Fix build error	2024-10-09 09:56:40 +02:00
Makefile	net/9p/usbg: Add new usb gadget function transport	2024-09-03 09:57:08 +02:00
mod.c	net/p9: load default transports	2022-01-10 10:00:09 +09:00
protocol.c	net: 9p: avoid freeing uninit memory in p9pdu_vreadf	2023-12-13 05:44:30 +09:00
protocol.h	net/9p: add p9_msg_buf_size()	2022-10-05 07:05:41 +09:00
trans_common.c	9p: fix file headers	2021-11-03 17:45:04 +09:00
trans_common.h	9p: fix a bunch of checkpatch warnings	2021-11-04 21:04:25 +09:00
trans_fd.c	9p/trans_fd: mark concurrent read and writes to p9_conn->err	2025-05-02 07:59:20 +02:00
trans_rdma.c	9p/rdma: unmap receive dma buffer in rdma_request()/post_recv()	2023-02-24 13:42:28 +00:00
trans_usbg.c	net/9p/usbg: fix handling of the failed kzalloc() memory allocation	2024-12-05 14:03:05 +01:00
trans_virtio.c	net: 9p: virtio: drop owner assignment	2024-05-22 08:31:17 -04:00
trans_xen.c	9p/xen: fix release of IRQ	2024-12-05 14:03:06 +01:00