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authorSven Eckelmann <sven@narfation.org>2018-12-30 14:46:01 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-15 10:09:13 +0300
commitd66213863ade314c5f24c07aba74e31fd8b8c3b1 (patch)
tree1b1ffbc276eac01bf3c664c2e94885417928775d /drivers/ide/ide-iops.c
parentbc09fc5d8acd819a3e06f2894975a328e375e2f7 (diff)
downloadlinux-d66213863ade314c5f24c07aba74e31fd8b8c3b1.tar.xz
batman-adv: Avoid WARN on net_device without parent in netns
commit 955d3411a17f590364238bd0d3329b61f20c1cd2 upstream. It is not allowed to use WARN* helpers on potential incorrect input from the user or transient problems because systems configured as panic_on_warn will reboot due to such a problem. A NULL return value of __dev_get_by_index can be caused by various problems which can either be related to the system configuration or problems (incorrectly returned network namespaces) in other (virtual) net_device drivers. batman-adv should not cause a (harmful) WARN in this situation and instead only report it via a simple message. Fixes: b7eddd0b3950 ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface") Reported-by: syzbot+c764de0fcfadca9a8595@syzkaller.appspotmail.com Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ide/ide-iops.c')
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