diff mbox series

[net,3/4] cfg80211: Avoid calling WARN_ON() on -ENOMEM in cfg80211_switch_netns()

Message ID 20250325141723.499850-4-i.abramov@mt-integration.ru (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series Avoid using WARN_ON() on allocation failure in device_rename() | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit fail Errors and warnings before: 7 this patch: 7
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers fail 3 blamed authors not CCed: ebiederm@xmission.com linville@tuxdriver.com johannes@sipsolutions.net; 4 maintainers not CCed: ebiederm@xmission.com linville@tuxdriver.com linux-wireless@vger.kernel.org johannes@sipsolutions.net
netdev/build_clang fail Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn fail Errors and warnings before: 7 this patch: 7
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 8 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Ivan Abramov March 25, 2025, 2:17 p.m. UTC 
It's pointless to call WARN_ON() in case of an allocation failure in
device_rename(), since it only leads to useless splats caused by deliberate
fault injections, so avoid it.

Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Fixes: 04600794958f ("cfg80211: support sysfs namespaces")
Signed-off-by: Ivan Abramov <i.abramov@mt-integration.ru>
---
 net/wireless/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 828e29872633..7c0ca2fd3b45 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -201,7 +201,7 @@  int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 	wiphy_net_set(&rdev->wiphy, net);
 
 	err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
-	WARN_ON(err);
+	WARN_ON(err && err != -ENOMEM);
 
 	nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);