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Message-ID: <202601110443.5ENBRFej-lkp@intel.com>
Date: Sun, 11 Jan 2026 05:06:31 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Jakub Kicinski <kuba@...nel.org>,
 "Maciej Żenczykowski" <maze@...gle.com>
Subject: include/net/sock.h:2100:16: sparse: sparse: cast to
 non-scalar

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   97313d6113ab4362ad15076f65560e65288fbcb8
commit: e84a4927a404f369c842c19de93b216627fcc690 net: annotate races around sk->sk_uid
date:   7 months ago
config: alpha-randconfig-r112-20260110 (https://download.01.org/0day-ci/archive/20260111/202601110443.5ENBRFej-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260111/202601110443.5ENBRFej-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601110443.5ENBRFej-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   net/ipv4/datagram.c: note: in included file (through include/net/inet_sock.h, include/net/ip.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/raw.c: note: in included file (through include/linux/mroute_base.h, include/linux/mroute.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/inet_connection_sock.c:328:36: sparse: sparse: context imbalance in 'inet_csk_find_open_port' - wrong count at exit
   net/ipv4/inet_connection_sock.c:605:23: sparse: sparse: context imbalance in 'inet_csk_get_port' - unexpected unlock
   net/ipv4/inet_connection_sock.c: note: in included file (through include/net/inet_sock.h, include/net/inet_connection_sock.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
   net/ipv4/inet_connection_sock.c:1467:9: sparse: sparse: context imbalance in 'inet_csk_complete_hashdance' - unexpected unlock
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/route.c: note: in included file (through include/linux/mroute_base.h, include/linux/mroute.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/ip_output.c: note: in included file (through include/net/inet_sock.h, include/net/ip.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/af_inet.c: note: in included file (through include/net/inet_sock.h, include/net/ip.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/tcp_ipv4.c:3415:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *data @@     got struct tcp_congestion_ops const [noderef] __rcu *tcp_congestion_control @@
   net/ipv4/tcp_ipv4.c:3415:41: sparse:     expected void const *data
   net/ipv4/tcp_ipv4.c:3415:41: sparse:     got struct tcp_congestion_ops const [noderef] __rcu *tcp_congestion_control
   net/ipv4/tcp_ipv4.c:3537:45: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *data @@     got struct tcp_congestion_ops const [noderef] __rcu *extern [addressable] [toplevel] tcp_congestion_control @@
   net/ipv4/tcp_ipv4.c:3537:45: sparse:     expected void const *data
   net/ipv4/tcp_ipv4.c:3537:45: sparse:     got struct tcp_congestion_ops const [noderef] __rcu *extern [addressable] [toplevel] tcp_congestion_control
   net/ipv4/tcp_ipv4.c:3541:50: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct tcp_congestion_ops const [noderef] __rcu *tcp_congestion_control @@     got struct tcp_congestion_ops * @@
   net/ipv4/tcp_ipv4.c:3541:50: sparse:     expected struct tcp_congestion_ops const [noderef] __rcu *tcp_congestion_control
   net/ipv4/tcp_ipv4.c:3541:50: sparse:     got struct tcp_congestion_ops *
   net/ipv4/tcp_ipv4.c: note: in included file (through include/net/inet_sock.h, include/net/icmp.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
   net/ipv4/tcp_ipv4.c:1846:25: sparse: sparse: context imbalance in 'tcp_v4_syn_recv_sock' - unexpected unlock
   net/ipv4/tcp_ipv4.c:2139:17: sparse: sparse: context imbalance in 'tcp_add_backlog' - unexpected unlock
   net/ipv4/tcp_ipv4.c:2401:21: sparse: sparse: context imbalance in 'tcp_v4_rcv' - different lock contexts for basic block
   net/ipv4/tcp_ipv4.c:2612:13: sparse: sparse: context imbalance in 'listening_get_first' - wrong count at exit
   net/ipv4/tcp_ipv4.c:2660:29: sparse: sparse: context imbalance in 'listening_get_next' - unexpected unlock
   net/ipv4/tcp_ipv4.c:2693:13: sparse: sparse: context imbalance in 'established_get_first' - wrong count at exit
   net/ipv4/tcp_ipv4.c:2738:40: sparse: sparse: context imbalance in 'established_get_next' - unexpected unlock
   net/ipv4/tcp_ipv4.c:2870:36: sparse: sparse: context imbalance in 'tcp_seq_stop' - unexpected unlock
   net/ipv4/tcp_ipv4.c:3091:20: sparse: sparse: context imbalance in 'bpf_iter_tcp_listening_batch' - unexpected unlock
   net/ipv4/tcp_ipv4.c:3119:40: sparse: sparse: context imbalance in 'bpf_iter_tcp_established_batch' - unexpected unlock
   net/ipv4/tcp_ipv4.c:3416:41: sparse: sparse: dereference of noderef expression
   net/ipv4/tcp_ipv4.c:3416:41: sparse: sparse: dereference of noderef expression
   net/ipv4/tcp_ipv4.c:3538:45: sparse: sparse: dereference of noderef expression
   net/ipv4/tcp_ipv4.c:3538:45: sparse: sparse: dereference of noderef expression
--
   net/ipv4/ping.c: note: in included file (through include/net/inet_sock.h, include/net/ip.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
--
   net/ipv4/udp.c: note: in included file (through include/linux/bpf-cgroup.h):
>> include/net/sock.h:2100:16: sparse: sparse: cast to non-scalar
   include/net/sock.h:2100:16: sparse: sparse: cast from non-scalar
   net/ipv4/udp.c:1668:28: sparse: sparse: context imbalance in 'udp_rmem_release' - unexpected unlock
   net/ipv4/udp.c:1700:19: sparse: sparse: context imbalance in 'busylock_acquire' - wrong count at exit
   net/ipv4/udp.c:1712:28: sparse: sparse: context imbalance in 'busylock_release' - unexpected unlock
   net/ipv4/udp.c:3305:9: sparse: sparse: context imbalance in 'udp_get_first' - wrong count at exit
   net/ipv4/udp.c:3322:39: sparse: sparse: context imbalance in 'udp_get_next' - unexpected unlock
   net/ipv4/udp.c:3370:31: sparse: sparse: context imbalance in 'udp_seq_stop' - unexpected unlock

vim +2100 include/net/sock.h

  2096	
  2097	static inline kuid_t sk_uid(const struct sock *sk)
  2098	{
  2099		/* Paired with WRITE_ONCE() in sockfs_setattr() */
> 2100		return READ_ONCE(sk->sk_uid);
  2101	}
  2102	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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