WARNING: suspicious RCU usage
4.14.307-syzkaller #0 Not tainted
-----------------------------
net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
2 locks held by syz-executor.4/11186:
#0: (cb_lock){++++}, at: [<ffffffff85e3f495>] genl_rcv+0x15/0x40 net/netlink/genetlink.c:635
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_lock net/netlink/genetlink.c:33 [inline]
#1: (genl_mutex){+.+.}, at: [<ffffffff85e400f2>] genl_rcv_msg+0x112/0x140 net/netlink/genetlink.c:623
stack backtrace:
CPU: 0 PID: 11186 Comm: syz-executor.4 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
tipc_bearer_find+0x1ff/0x2f0 net/tipc/bearer.c:177
tipc_nl_compat_link_set+0x40b/0xb90 net/tipc/netlink_compat.c:807
__tipc_nl_compat_doit net/tipc/netlink_compat.c:316 [inline]
tipc_nl_compat_doit+0x192/0x5d0 net/tipc/netlink_compat.c:364
tipc_nl_compat_handle net/tipc/netlink_compat.c:1215 [inline]
tipc_nl_compat_recv+0xa0b/0xae0 net/tipc/netlink_compat.c:1297
genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600
genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2461
genl_rcv+0x24/0x40 net/netlink/genetlink.c:636
netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1328
netlink_sendmsg+0x651/0xbc0 net/netlink/af_netlink.c:1900
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: 0033:0x7fcb557bc0f9
RSP: 002b:00007fcb53d2e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fcb558dbf80 RCX: 00007fcb557bc0f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007fcb55817ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd3d6678af R14: 00007fcb53d2e300 R15: 0000000000022000
netlink: 32 bytes leftover after parsing attributes in process `syz-executor.2'.
Bearer <ib:veth1_to_bond> rejected, not supported in standalone mode
Bearer <ib:veth1_to_bond> rejected, not supported in standalone mode
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
isofs_fill_super: get root inode failed
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 44 bytes leftover after parsing attributes in process `syz-executor.0'.
Bearer <udp:syz2> rejected, not supported in standalone mode
netlink: 80 bytes leftover after parsing attributes in process `syz-executor.5'.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bearer <udp:syz2> rejected, not supported in standalone mode
vhci_hcd: Failed attach request for unsupported USB speed: UNKNOWN
======================================================
WARNING: the mand mount option is being deprecated and
will be removed in v5.15!
======================================================
EXT4-fs (loop3): Ignoring removed nomblk_io_submit option
EXT4-fs (loop3): mounted filesystem without journal. Opts: barrier,errors=remount-ro,nomblk_io_submit,nodiscard,usrjquota=,stripe=0x000000000000007f,
EXT4-fs error (device loop3): ext4_validate_block_bitmap:405: comm syz-executor.3: bg 0: block 2: invalid block bitmap
EXT4-fs (loop3): Remounting filesystem read-only
EXT4-fs (loop3): Ignoring removed nomblk_io_submit option
EXT4-fs (loop3): mounted filesystem without journal. Opts: barrier,errors=remount-ro,nomblk_io_submit,nodiscard,usrjquota=,stripe=0x000000000000007f,
ntfs: volume version 3.1.
EXT4-fs error (device loop3): ext4_validate_block_bitmap:405: comm syz-executor.3: bg 0: block 2: invalid block bitmap
EXT4-fs (loop3): Remounting filesystem read-only
audit: type=1800 audit(1677948888.474:24): pid=12300 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14030 res=0