================================ WARNING: inconsistent lock state 4.19.106-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. ksoftirqd/1/18 [HC0[0]:SC1[1]:HE1:SE0] takes: 00000000e23d012b (&(&local->client_conns_lock)->rlock){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000e23d012b (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_one_client_conn net/rxrpc/conn_client.c:949 [inline] 00000000e23d012b (&(&local->client_conns_lock)->rlock){+.?.}, at: rxrpc_put_client_conn+0x666/0xc00 net/rxrpc/conn_client.c:1002 {SOFTIRQ-ON-W} state was registered at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_get_client_conn net/rxrpc/conn_client.c:309 [inline] rxrpc_connect_call+0x301/0x4630 net/rxrpc/conn_client.c:702 rxrpc_new_client_call+0x8c6/0x1850 net/rxrpc/call_object.c:291 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:596 [inline] rxrpc_do_sendmsg+0xf2e/0x1bc1 net/rxrpc/sendmsg.c:652 rxrpc_sendmsg+0x4a8/0x5b0 net/rxrpc/af_rxrpc.c:593 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x195/0x470 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2236 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 43109012 hardirqs last enabled at (43109012): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (43109012): [] _raw_spin_unlock_irqrestore+0x67/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (43109011): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (43109011): [] _raw_spin_lock_irqsave+0x66/0xbf kernel/locking/spinlock.c:152 softirqs last enabled at (43108732): [] __do_softirq+0x650/0x93c kernel/softirq.c:318 softirqs last disabled at (43108737): [] run_ksoftirqd kernel/softirq.c:653 [inline] softirqs last disabled at (43108737): [] run_ksoftirqd+0x89/0x100 kernel/softirq.c:645 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&local->client_conns_lock)->rlock); lock(&(&local->client_conns_lock)->rlock); *** DEADLOCK *** 1 lock held by ksoftirqd/1/18: #0: 00000000e4387ff8 (rcu_callback){....}, at: __rcu_reclaim kernel/rcu/rcu.h:226 [inline] #0: 00000000e4387ff8 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2584 [inline] #0: 00000000e4387ff8 (rcu_callback){....}, at: invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] #0: 00000000e4387ff8 (rcu_callback){....}, at: __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] #0: 00000000e4387ff8 (rcu_callback){....}, at: rcu_process_callbacks+0xbff/0x17f0 kernel/rcu/tree.c:2881 stack backtrace: CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.19.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 print_usage_bug.cold+0x327/0x425 kernel/locking/lockdep.c:2540 valid_state kernel/locking/lockdep.c:2553 [inline] mark_lock_irq kernel/locking/lockdep.c:2747 [inline] mark_lock+0xc71/0x11b0 kernel/locking/lockdep.c:3127 mark_irqflags kernel/locking/lockdep.c:3005 [inline] __lock_acquire+0xc62/0x49c0 kernel/locking/lockdep.c:3368 lock_acquire+0x170/0x400 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_put_one_client_conn net/rxrpc/conn_client.c:949 [inline] rxrpc_put_client_conn+0x666/0xc00 net/rxrpc/conn_client.c:1002 rxrpc_put_connection net/rxrpc/ar-internal.h:951 [inline] rxrpc_rcu_destroy_call+0xb6/0x1e0 net/rxrpc/call_object.c:657 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0xb2d/0x17f0 kernel/rcu/tree.c:2881 __do_softirq+0x26c/0x93c kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:653 [inline] run_ksoftirqd+0x89/0x100 kernel/softirq.c:645 smpboot_thread_fn+0x653/0x9d0 kernel/smpboot.c:164 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 audit: type=1400 audit(1582797601.745:88): avc: denied { sys_admin } for pid=9707 comm="syz-executor.2" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 TCP: request_sock_TCP: Possible SYN flooding on port 2. Sending cookies. Check SNMP counters. audit: type=1400 audit(1582797603.105:89): avc: denied { map_create } for pid=9784 comm="syz-executor.3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 input: syz1 as /devices/virtual/input/input7 JFS: continue" is an invalid error handler JFS: continue" is an invalid error handler input: syz1 as /devices/virtual/input/input8 input: syz1 as /devices/virtual/input/input9 input: syz1 as /devices/virtual/input/input10 input: syz1 as /devices/virtual/input/input11 input: syz1 as /devices/virtual/input/input12 capability: warning: `syz-executor.5' uses deprecated v2 capabilities in a way that may be insecure input: syz1 as /devices/virtual/input/input13 audit: type=1400 audit(1582797608.985:90): avc: denied { map } for pid=10145 comm="syz-executor.0" path=2F6D656D66643A73797374656D656D306D643573756D24202864656C6574656429 dev="tmpfs" ino=37948 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 gfs2: fsid=_h: Trying to join cluster "lock_nolock", "_h" gfs2: fsid=_h: Now mounting FS... gfs2: not a GFS2 filesystem gfs2: fsid=_h: can't read superblock gfs2: fsid=_h: can't read superblock: -22 gfs2: fsid=_h: Trying to join cluster "lock_nolock", "_h" gfs2: fsid=_h: Now mounting FS... gfs2: not a GFS2 filesystem gfs2: fsid=_h: can't read superblock gfs2: fsid=_h: can't read superblock: -22 audit: type=1400 audit(1582797609.905:91): avc: denied { map_read map_write } for pid=10208 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 hid-generic 0000:0000:0000.0001: unknown main item tag 0x0 hid-generic 0000:0000:0000.0001: hidraw0: HID v0.00 Device [syz0] on syz0 gfs2: fsid=_h: Trying to join cluster "lock_nolock", "_h" gfs2: fsid=_h: Now mounting FS... gfs2: not a GFS2 filesystem gfs2: fsid=_h: can't read superblock gfs2: fsid=_h: can't read superblock: -22 gfs2: fsid=_h: Trying to join cluster "lock_nolock", "_h" gfs2: fsid=_h: Now mounting FS... gfs2: not a GFS2 filesystem overlayfs: upperdir is in-use as upperdir/workdir of another mount, mount with '-o index=off' to override exclusive upperdir protection. gfs2: fsid=_h: can't read superblock