bisecting fixing commit since e853993d29aa42ac4b3c2912db975a0a66d7a5b0
building syzkaller on 45a13a7381e60020d94d037d88a75727984b7a9a
testing commit e853993d29aa42ac4b3c2912db975a0a66d7a5b0
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c7883f4dc3c791f8dd6a98b1b6fc15176cc657b3553738a604354f3034715166
run #0: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #1: crashed: unregister_netdevice: waiting for DEV to become free
run #2: crashed: unregister_netdevice: waiting for DEV to become free
run #3: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #4: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #5: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #6: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #7: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #10: crashed: unregister_netdevice: waiting for DEV to become free
run #11: crashed: unregister_netdevice: waiting for DEV to become free
run #12: crashed: unregister_netdevice: waiting for DEV to become free
run #13: crashed: unregister_netdevice: waiting for DEV to become free
run #14: crashed: unregister_netdevice: waiting for DEV to become free
run #15: crashed: unregister_netdevice: waiting for DEV to become free
run #16: crashed: unregister_netdevice: waiting for DEV to become free
run #17: crashed: unregister_netdevice: waiting for DEV to become free
run #18: crashed: unregister_netdevice: waiting for DEV to become free
run #19: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 74766a973637a02c32c04c1c6496e114e4855239
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4ce2c197f6ab6d6eed4bf4a4410e09c516b30e548daf7a8923733e45d139c837
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #2: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #3: crashed: INFO: trying to register non-static key in ieee802154_del_devkey
run #4: crashed: unregister_netdevice: waiting for DEV to become free
run #5: crashed: unregister_netdevice: waiting for DEV to become free
run #6: crashed: unregister_netdevice: waiting for DEV to become free
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m34.601201069s (build: 21m12.027959011s, test: 5m56.711315232s)
the crash still happens on HEAD
commit msg: Linux 4.14.275
crash: unregister_netdevice: waiting for DEV to become free
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
syz-executor.0 (7956) used greatest stack depth: 24048 bytes left
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 8288 Comm: syz-executor110 Not tainted 4.14.275-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14b/0x1e7 lib/dump_stack.c:58
 register_lock_class+0x2dd/0x1300 kernel/locking/lockdep.c:768
 __lock_acquire+0x18b/0x42d0 kernel/locking/lockdep.c:3378
 lock_acquire+0x17e/0x3e0 kernel/locking/lockdep.c:3998
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xed/0x1490 kernel/locking/mutex.c:893
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
 ieee802154_del_devkey+0x45/0x80 net/mac802154/cfg.c:450
 rdev_del_devkey net/ieee802154/rdev-ops.h:316 [inline]
 nl802154_del_llsec_devkey+0x243/0x360 net/ieee802154/nl802154.c:1994
 genl_family_rcv_msg+0x57f/0xfe0 net/netlink/genetlink.c:600
 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:625
 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2446
 genl_rcv+0x23/0x40 net/netlink/genetlink.c:636
 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline]
 netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1320
 netlink_sendmsg+0x651/0xc10 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:656
 ___sys_sendmsg+0x625/0x920 net/socket.c:2062
 __sys_sendmsg+0xc1/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0xd/0x20 net/socket.c:2103
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fecf7806609
RSP: 002b:00007ffe36df41a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fecf7806609
RDX: 0000000000040800 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007fecf77c9fd0 R08: 0000000000000002 R09: 0000000000000000
R10: 000000000000000c R11: