============================================
WARNING: possible recursive locking detected
4.14.302-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.1/13170 is trying to acquire lock:
(rtnl_mutex){+.+.}, at: [<ffffffff86fbf45b>] hsr_dev_destroy+0x1b/0xb0 net/hsr/hsr_device.c:373
but task is already holding lock:
(rtnl_mutex){+.+.}, at: [<ffffffff85c8babd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
(rtnl_mutex){+.+.}, at: [<ffffffff85c8babd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(rtnl_mutex);
lock(rtnl_mutex);
*** DEADLOCK ***
May be due to missing lock nesting notation
1 lock held by syz-executor.1/13170:
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8babd>] rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: (rtnl_mutex){+.+.}, at: [<ffffffff85c8babd>] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4317
stack backtrace:
CPU: 1 PID: 13170 Comm: syz-executor.1 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_deadlock_bug kernel/locking/lockdep.c:1800 [inline]
check_deadlock kernel/locking/lockdep.c:1847 [inline]
validate_chain kernel/locking/lockdep.c:2448 [inline]
__lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491
lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
hsr_dev_destroy+0x1b/0xb0 net/hsr/hsr_device.c:373
register_netdevice+0x83c/0xe50 net/core/dev.c:7729
hsr_dev_finalize+0x57b/0x800 net/hsr/hsr_device.c:492
hsr_newlink+0x259/0x3a0 net/hsr/hsr_netlink.c:78
rtnl_newlink+0xf7c/0x1830 net/core/rtnetlink.c:2730
rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322
netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xb5/0x100 net/socket.c:656
___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
__sys_sendmsg+0xa3/0x120 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x27/0x40 net/socket.c:2103
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f2ca31e90d9
RSP: 002b:00007f2ca175b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f2ca3308f80 RCX: 00007f2ca31e90d9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f2ca175b1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe8b1bb78f R14: 00007f2ca175b300 R15: 0000000000022000
PM: Basic memory bitmaps freed
PM: Marking nosave pages: [mem 0x00000000-0x00000fff]
PM: Marking nosave pages: [mem 0x0009f000-0x000fffff]
PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff]
PM: Basic memory bitmaps created
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
PM: Basic memory bitmaps freed
audit: type=1800 audit(1671148304.554:38): pid=13230 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="loop2" ino=18 res=0
audit: type=1800 audit(1671148304.584:39): pid=13230 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="loop2" ino=18 res=0