On 2024-02-15 09:43, 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:
Hi Andrew,
I notice that you should update the patch you have in your tree
(https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/nvdimm-pmem-fix-leak-on-dax_add_host-failure.patch)
with this updated version which includes additional Reviewed-by tags and
removes unneeded context that appears to be taken from the previous cover
letter.
Following your request, I have extracted this patch from the series.
Thanks,
Mathieu
out_cleanup_dax:
kill_dax(pmem->dax_dev);
put_dax(pmem->dax_dev);
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Reviewed-by: Fan Ni <fan.ni@xxxxxxxxxxx>
Cc: Alasdair Kergon <agk@xxxxxxxxxx>
Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
Cc: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: linux-cxl@xxxxxxxxxxxxxxx
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: linux-xfs@xxxxxxxxxxxxxxx
Cc: dm-devel@xxxxxxxxxxxxxxx
Cc: nvdimm@xxxxxxxxxxxxxxx
---
Changes since v1:
- Add Reviewed-by tags.
---
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;
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
