| Message ID | 20211025083315.4752-5-laoar.shao@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | extend task comm from 16 to 24 | expand |
On 10/25/21 4:33 AM, Yafang Shao wrote: > Use strscpy_pad() instead of 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> > Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> > Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Steven Rostedt <rostedt@goodmis.org> > 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(-) This qib patch looks fine. Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
On Mon, Oct 25, 2021 at 08:33:07AM +0000, Yafang Shao wrote: > Use strscpy_pad() instead of 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> > Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> > Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> > Cc: Peter Zijlstra <peterz@infradead.org> > Cc: Steven Rostedt <rostedt@goodmis.org> > 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(-) > > 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..7ab2b448c183 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)); > + strscpy_pad(rcd->comm, current->comm, sizeof(rcd->comm)); This should use (the adjusted) get_task_comm() instead of leaving this open-coded. > ctxt_fp(fp) = rcd; > qib_stats.sps_ctxts++; > dd->freectxts--; > -- > 2.17.1 >
On Tue, Oct 26, 2021 at 5:16 AM Kees Cook <keescook@chromium.org> wrote: > > On Mon, Oct 25, 2021 at 08:33:07AM +0000, Yafang Shao wrote: > > Use strscpy_pad() instead of 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> > > Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > > Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> > > Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> > > Cc: Peter Zijlstra <peterz@infradead.org> > > Cc: Steven Rostedt <rostedt@goodmis.org> > > 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(-) > > > > 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..7ab2b448c183 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)); > > + strscpy_pad(rcd->comm, current->comm, sizeof(rcd->comm)); > > This should use (the adjusted) get_task_comm() instead of leaving this > open-coded. > Sure, that is better. > > ctxt_fp(fp) = rcd; > > qib_stats.sps_ctxts++; > > dd->freectxts--; > > -- > > 2.17.1 > > > > -- > Kees Cook
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..7ab2b448c183 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)); + strscpy_pad(rcd->comm, current->comm, sizeof(rcd->comm)); ctxt_fp(fp) = rcd; qib_stats.sps_ctxts++; dd->freectxts--;
Use strscpy_pad() instead of 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> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> 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(-)