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linux/drivers/net/hamradio
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Stanislav Fomichev c642379608 hamradio: ignore ops-locked netdevs 
Syzkaller managed to trigger lock dependency in xsk_notify via
register_netdevice. As discussed in [0], using register_netdevice
in the notifiers is problematic so skip adding hamradio for ops-locked
devices.

       xsk_notifier+0x89/0x230 net/xdp/xsk.c:1664
       notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
       call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
       call_netdevice_notifiers net/core/dev.c:2281 [inline]
       unregister_netdevice_many_notify+0x14d7/0x1ff0 net/core/dev.c:12156
       unregister_netdevice_many net/core/dev.c:12219 [inline]
       unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12063
       register_netdevice+0x1689/0x1ae0 net/core/dev.c:11241
       bpq_new_device drivers/net/hamradio/bpqether.c:481 [inline]
       bpq_device_event+0x491/0x600 drivers/net/hamradio/bpqether.c:523
       notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
       call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
       call_netdevice_notifiers net/core/dev.c:2281 [inline]
       __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
       netif_change_flags+0xe8/0x1a0 net/core/dev.c:9608
       dev_change_flags+0x130/0x260 net/core/dev_api.c:68
       devinet_ioctl+0xbb4/0x1b50 net/ipv4/devinet.c:1200
       inet_ioctl+0x3c0/0x4c0 net/ipv4/af_inet.c:1001

0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/
Fixes: 4c975fd700 ("net: hold instance lock during NETDEV_REGISTER/UP")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Reported-by: syzbot+e6300f66a999a6612477@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=e6300f66a999a6612477
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250806213726.1383379-2-sdf@fomichev.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-08-08 13:22:28 -07:00
..
6pack.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
baycom_epp.c hamradio: Remove unnecessary strscpy_pad() size arguments 2025-04-08 12:38:47 +02:00
baycom_par.c hamradio: baycom: replace strcpy() with strscpy() 2025-02-11 16:23:38 -08:00
baycom_ser_fdx.c hamradio: baycom: replace strcpy() with strscpy() 2025-02-11 16:23:38 -08:00
baycom_ser_hdx.c hamradio: baycom: replace strcpy() with strscpy() 2025-02-11 16:23:38 -08:00
bpqether.c hamradio: ignore ops-locked netdevs 2025-08-08 13:22:28 -07:00
hdlcdrv.c
Kconfig
Makefile
mkiss.c
scc.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
yam.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
z8530.h