This is a note to let you know that I've just added the patch titled
perf/core: Fix error handling in perf_event_alloc()
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: perf-core-fix-error-handling-in-perf_event_alloc.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 17:09:24 CEST 2018
From: Dan Carpenter dan.carpenter@oracle.com Date: Mon, 22 May 2017 12:04:18 +0300 Subject: perf/core: Fix error handling in perf_event_alloc()
From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 36cc2b9222b5106de34085c4dd8635ac67ef5cba ]
We don't set an error code here which means that perf_event_alloc() returns ERR_PTR(0) (in other words NULL). The callers are not expecting that and would Oops.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Arnaldo Carvalho de Melo acme@kernel.org Cc: Arnaldo Carvalho de Melo acme@redhat.com Cc: Jiri Olsa jolsa@redhat.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Stephane Eranian eranian@google.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Vince Weaver vincent.weaver@maine.edu Fixes: 375637bc5249 ("perf/core: Introduce address range filtering") Link: http://lkml.kernel.org/r/20170522090418.hvs6icgpdo53wkn5@mwanda Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/events/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9289,8 +9289,10 @@ perf_event_alloc(struct perf_event_attr event->addr_filters_offs = kcalloc(pmu->nr_addr_filters, sizeof(unsigned long), GFP_KERNEL); - if (!event->addr_filters_offs) + if (!event->addr_filters_offs) { + err = -ENOMEM; goto err_per_task; + }
/* force hw sync on the address filters */ event->addr_filters_gen = 1;
Patches currently in stable-queue which might be from dan.carpenter@oracle.com are
queue-4.9/block-fix-an-error-code-in-add_partition.patch queue-4.9/x.509-fix-error-code-in-x509_cert_parse.patch queue-4.9/rdma-iw_cxgb4-avoid-touch-after-free-error-in-arp-failure-handlers.patch queue-4.9/drm-amdkfd-null-dereference-involving-create_process.patch queue-4.9/pnfs-flexfiles-missing-error-code-in-ff_layout_alloc_lseg.patch queue-4.9/drivers-misc-vmw_vmci-vmci_queue_pair.c-fix-a-couple-integer-overflow-tests.patch queue-4.9/cxl-unlock-on-error-in-probe.patch queue-4.9/md-cluster-fix-potential-lock-issue-in-add_new_disk.patch queue-4.9/ipmi_ssif-unlock-on-allocation-failure.patch queue-4.9/powercap-fix-an-error-code-in-powercap_register_zone.patch queue-4.9/perf-core-fix-error-handling-in-perf_event_alloc.patch queue-4.9/libceph-null-deref-on-crush_decode-error-path.patch