| Message ID | 20240212162722.19080-1-mathieu.desnoyers@efficios.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | nvdimm/pmem: Fix leak on dax_add_host() failure | expand |
On 2/12/24 9:27 AM, Mathieu Desnoyers wrote: > Fix a leak on dax_add_host() error, where "goto out_cleanup_dax" is done > before setting pmem->dax_dev, which therefore issues the two following > calls on NULL pointers: > > out_cleanup_dax: > kill_dax(pmem->dax_dev); > put_dax(pmem->dax_dev); > > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > Reviewed-by: Dan Williams <dan.j.williams@intel.com> > Cc: Alasdair Kergon <agk@redhat.com> > Cc: Mike Snitzer <snitzer@kernel.org> > Cc: Mikulas Patocka <mpatocka@redhat.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Dan Williams <dan.j.williams@intel.com> > Cc: Vishal Verma <vishal.l.verma@intel.com> > Cc: Dave Jiang <dave.jiang@intel.com> > Cc: Matthew Wilcox <willy@infradead.org> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Russell King <linux@armlinux.org.uk> > Cc: linux-arch@vger.kernel.org > Cc: linux-cxl@vger.kernel.org > Cc: linux-fsdevel@vger.kernel.org > Cc: linux-mm@kvack.org > Cc: linux-xfs@vger.kernel.org > Cc: dm-devel@lists.linux.dev > Cc: nvdimm@lists.linux.dev Reviewed-by: Dave Jiang <dave.jiang@intel.com> > --- > drivers/nvdimm/pmem.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c > index 4e8fdcb3f1c8..9fe358090720 100644 > --- a/drivers/nvdimm/pmem.c > +++ b/drivers/nvdimm/pmem.c > @@ -566,12 +566,11 @@ static int pmem_attach_disk(struct device *dev, > set_dax_nomc(dax_dev); > if (is_nvdimm_sync(nd_region)) > set_dax_synchronous(dax_dev); > + pmem->dax_dev = dax_dev; > rc = dax_add_host(dax_dev, disk); > if (rc) > goto out_cleanup_dax; > dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); > - pmem->dax_dev = dax_dev; > - > rc = device_add_disk(dev, disk, pmem_attribute_groups); > if (rc) > goto out_remove_host;
On Mon, Feb 12, 2024 at 11:27:22AM -0500, Mathieu Desnoyers wrote: > Fix a leak on dax_add_host() error, where "goto out_cleanup_dax" is done > before setting pmem->dax_dev, which therefore issues the two following > calls on NULL pointers: > > out_cleanup_dax: > kill_dax(pmem->dax_dev); > put_dax(pmem->dax_dev); > > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> > Reviewed-by: Dan Williams <dan.j.williams@intel.com> > Cc: Alasdair Kergon <agk@redhat.com> > Cc: Mike Snitzer <snitzer@kernel.org> > Cc: Mikulas Patocka <mpatocka@redhat.com> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Linus Torvalds <torvalds@linux-foundation.org> > Cc: Dan Williams <dan.j.williams@intel.com> > Cc: Vishal Verma <vishal.l.verma@intel.com> > Cc: Dave Jiang <dave.jiang@intel.com> > Cc: Matthew Wilcox <willy@infradead.org> > Cc: Arnd Bergmann <arnd@arndb.de> > Cc: Russell King <linux@armlinux.org.uk> > Cc: linux-arch@vger.kernel.org > Cc: linux-cxl@vger.kernel.org > Cc: linux-fsdevel@vger.kernel.org > Cc: linux-mm@kvack.org > Cc: linux-xfs@vger.kernel.org > Cc: dm-devel@lists.linux.dev > Cc: nvdimm@lists.linux.dev Reviewed-by: Fan Ni <fan.ni@samsung.com> > --- > drivers/nvdimm/pmem.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c > index 4e8fdcb3f1c8..9fe358090720 100644 > --- a/drivers/nvdimm/pmem.c > +++ b/drivers/nvdimm/pmem.c > @@ -566,12 +566,11 @@ static int pmem_attach_disk(struct device *dev, > set_dax_nomc(dax_dev); > if (is_nvdimm_sync(nd_region)) > set_dax_synchronous(dax_dev); > + pmem->dax_dev = dax_dev; > rc = dax_add_host(dax_dev, disk); > if (rc) > goto out_cleanup_dax; > dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); > - pmem->dax_dev = dax_dev; > - > rc = device_add_disk(dev, disk, pmem_attribute_groups); > if (rc) > goto out_remove_host; > -- > 2.39.2 >
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 4e8fdcb3f1c8..9fe358090720 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -566,12 +566,11 @@ static int pmem_attach_disk(struct device *dev, set_dax_nomc(dax_dev); if (is_nvdimm_sync(nd_region)) set_dax_synchronous(dax_dev); + pmem->dax_dev = dax_dev; rc = dax_add_host(dax_dev, disk); if (rc) goto out_cleanup_dax; dax_write_cache(dax_dev, nvdimm_has_cache(nd_region)); - pmem->dax_dev = dax_dev; - rc = device_add_disk(dev, disk, pmem_attribute_groups); if (rc) goto out_remove_host;
Fix a leak on dax_add_host() error, where "goto out_cleanup_dax" is done before setting pmem->dax_dev, which therefore issues the two following calls on NULL pointers: out_cleanup_dax: kill_dax(pmem->dax_dev); put_dax(pmem->dax_dev); Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@armlinux.org.uk> Cc: linux-arch@vger.kernel.org Cc: linux-cxl@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-xfs@vger.kernel.org Cc: dm-devel@lists.linux.dev Cc: nvdimm@lists.linux.dev --- drivers/nvdimm/pmem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)