diff mbox series

[3/7] drivers/infiniband: use get_task_comm instead of open-coded string copy

Message ID 20211108083840.4627-4-laoar.shao@gmail.com (mailing list archive)
State Superseded
Headers show
Series task comm cleanups | expand

Checks

Context Check Description
bpf/vmtest-bpf success VM_Test
bpf/vmtest-bpf-PR success PR summary
bpf/vmtest-bpf-next success VM_Test
bpf/vmtest-bpf-next-PR success PR summary
netdev/tree_selection success Not a local patch, async

Commit Message

Yafang Shao Nov. 8, 2021, 8:38 a.m. UTC 
Use get_task_comm() instead of open-coded strlcpy() to make the comm always
nul terminated. As the comment above the hard-coded 16, we can replace it
with TASK_COMM_LEN, then it will adopt to the comm size change.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Petr Mladek <pmladek@suse.com>
---
 drivers/infiniband/hw/qib/qib.h          | 2 +-
 drivers/infiniband/hw/qib/qib_file_ops.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Comments

David Hildenbrand Nov. 11, 2021, 10:01 a.m. UTC | #1 
On 08.11.21 09:38, Yafang Shao wrote:
> Use get_task_comm() instead of open-coded strlcpy() to make the comm always
> nul terminated. As the comment above the hard-coded 16, we can replace it
> with TASK_COMM_LEN, then it will adopt to the comm size change.
> 
> Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
> Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
> Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Petr Mladek <pmladek@suse.com>
> ---

Reviewed-by: David Hildenbrand <david@redhat.com>
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h
index 9363bccfc6e7..a8e1c30c370f 100644
--- a/drivers/infiniband/hw/qib/qib.h
+++ b/drivers/infiniband/hw/qib/qib.h
@@ -196,7 +196,7 @@  struct qib_ctxtdata {
 	pid_t pid;
 	pid_t subpid[QLOGIC_IB_MAX_SUBCTXT];
 	/* same size as task_struct .comm[], command that opened context */
-	char comm[16];
+	char comm[TASK_COMM_LEN];
 	/* pkeys set by this use of this ctxt */
 	u16 pkeys[4];
 	/* so file ops can get at unit */
diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c
index 63854f4b6524..aa290928cf96 100644
--- a/drivers/infiniband/hw/qib/qib_file_ops.c
+++ b/drivers/infiniband/hw/qib/qib_file_ops.c
@@ -1321,7 +1321,7 @@  static int setup_ctxt(struct qib_pportdata *ppd, int ctxt,
 	rcd->tid_pg_list = ptmp;
 	rcd->pid = current->pid;
 	init_waitqueue_head(&dd->rcd[ctxt]->wait);
-	strlcpy(rcd->comm, current->comm, sizeof(rcd->comm));
+	get_task_comm(rcd->comm, current);
 	ctxt_fp(fp) = rcd;
 	qib_stats.sps_ctxts++;
 	dd->freectxts--;