From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Beau Belgrave <beaub@linux.microsoft.com>
Subject: [for-next][PATCH 11/15] tracing/user_events: Use WRITE instead of READ for io vector import
Date: Thu, 29 Sep 2022 18:55:53 -0400 [thread overview]
Message-ID: <20220929225639.450643112@goodmis.org> (raw)
In-Reply-To: 20220929225542.784716766@goodmis.org
From: Beau Belgrave <beaub@linux.microsoft.com>
import_single_range expects the direction/rw to be where it came from,
not the protection/limit. Since the import is in a write path use WRITE.
Link: https://lkml.kernel.org/r/20220728233309.1896-3-beaub@linux.microsoft.com
Link: https://lore.kernel.org/all/2059213643.196683.1648499088753.JavaMail.zimbra@efficios.com/
Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/trace/trace_events_user.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
index 075d694d20e3..15edbf6b1e2e 100644
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -1245,7 +1245,8 @@ static ssize_t user_events_write(struct file *file, const char __user *ubuf,
if (unlikely(*ppos != 0))
return -EFAULT;
- if (unlikely(import_single_range(READ, (char *)ubuf, count, &iov, &i)))
+ if (unlikely(import_single_range(WRITE, (char __user *)ubuf,
+ count, &iov, &i)))
return -EFAULT;
return user_events_write_core(file, &i);
--
2.35.1
next prev parent reply other threads:[~2022-09-29 22:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-29 22:55 [for-next][PATCH 00/15] tracing: More updates for 6.1 Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 01/15] ftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 02/15] ring-buffer: Allow splice to read previous partially read pages Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 03/15] ring-buffer: Have the shortest_full queue be the shortest not longest Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 04/15] ring-buffer: Check pending waiters when doing wake ups as well Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 05/15] ring-buffer: Add ring_buffer_wake_waiters() Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 06/15] tracing: Wake up ring buffer waiters on closing of the file Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 07/15] tracing: Add ioctl() to force ring buffer waiters to wake up Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 08/15] tracing: Wake up waiters when tracing is disabled Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 09/15] tracing: Fix spelling mistake "preapre" -> "prepare" Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 10/15] tracing/user_events: Use NULL for strstr checks Steven Rostedt
2022-09-29 22:55 ` Steven Rostedt [this message]
2022-09-29 22:55 ` [for-next][PATCH 12/15] tracing/user_events: Ensure user provided strings are safely formatted Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 13/15] tracing/user_events: Use refcount instead of atomic for ref tracking Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 14/15] tracing/user_events: Use bits vs bytes for enabled status page data Steven Rostedt
2022-09-29 22:55 ` [for-next][PATCH 15/15] tracing/user_events: Update ABI documentation to align to bits vs bytes Steven Rostedt
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