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| author |   Dave Jiang <dave.jiang@intel.com> | 2025-10-09 08:40:01 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-23 16:24:35 +0200 |
| commit | b8a69e3b1a460bf5d96dd53cbd121aa2cd346886 (patch) | |
| tree | 1780bc200e8b3e8df88aaea9660e5ed96b76c1d5 /tools/perf/scripts/python/bin/ssh:/git@git.zx2c4.com | |
| parent | drm/xe: Enable media sampler power gating (diff) | |
cxl/features: Add check for no entries in cxl_feature_info
[ Upstream commit a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e ]
cxl EDAC calls cxl_feature_info() to get the feature information and
if the hardware has no Features support, cxlfs may be passed in as
NULL.
[ 51.957498] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 51.965571] #PF: supervisor read access in kernel mode
[ 51.971559] #PF: error_code(0x0000) - not-present page
[ 51.977542] PGD 17e4f6067 P4D 0
[ 51.981384] Oops: Oops: 0000 [#1] SMP NOPTI
[ 51.986300] CPU: 49 UID: 0 PID: 3782 Comm: systemd-udevd Not tainted 6.17.0dj
test+ #64 PREEMPT(voluntary)
[ 51.997355] Hardware name: <removed>
[ 52.009790] RIP: 0010:cxl_feature_info+0xa/0x80 [cxl_core]
Add a check for cxlfs before dereferencing it and return -EOPNOTSUPP if
there is no cxlfs created due to no hardware support.
Fixes: eb5dfcb9e36d ("cxl: Add support to handle user feature commands for set feature")
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions