lkml.org 
[lkml]   [2018]   [Feb]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.14 187/195] acpi, nfit: fix register dimm error handling
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Toshi Kani <toshi.kani@hpe.com>

commit 23fbd7c70aec7600e3227eb24259fc55bf6e4881 upstream.

A NULL pointer reference kernel bug was observed when
acpi_nfit_add_dimm() called in acpi_nfit_register_dimms() failed. This
error path does not set nfit_mem->nvdimm, but the 2nd
list_for_each_entry() loop in the function assumes it's always set. Add
a check to nfit_mem->nvdimm.

Fixes: ba9c8dd3c222 ("acpi, nfit: add dimm device notification support")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/acpi/nfit/core.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1618,6 +1618,9 @@ static int acpi_nfit_register_dimms(stru
struct kernfs_node *nfit_kernfs;

nvdimm = nfit_mem->nvdimm;
+ if (!nvdimm)
+ continue;
+
nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
if (nfit_kernfs)
nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,

\
 
 \ /
  Last update: 2018-02-15 18:09    [W:0.430 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site