================================ WARNING: inconsistent lock state 4.19.105-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. udevd/10656 [HC0[0]:SC1[1]:HE1:SE0] takes: 0000000008ff9093 (rxrpc_conn_id_lock){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 0000000008ff9093 (rxrpc_conn_id_lock){+.?.}, at: rxrpc_put_client_connection_id.part.0+0x19/0x70 net/rxrpc/conn_client.c:143 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_get_client_connection_id net/rxrpc/conn_client.c:114 [inline] rxrpc_alloc_client_connection net/rxrpc/conn_client.c:198 [inline] rxrpc_get_client_conn net/rxrpc/conn_client.c:345 [inline] rxrpc_connect_call+0x948/0x4920 net/rxrpc/conn_client.c:702 rxrpc_new_client_call+0x8e7/0x1880 net/rxrpc/call_object.c:291 rxrpc_new_client_call_for_sendmsg net/rxrpc/sendmsg.c:596 [inline] rxrpc_do_sendmsg+0xfc3/0x1ca3 net/rxrpc/sendmsg.c:652 rxrpc_sendmsg+0x4a0/0x5b0 net/rxrpc/af_rxrpc.c:593 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2115 __sys_sendmmsg+0x1bf/0x4e0 net/socket.c:2210 __do_sys_sendmmsg net/socket.c:2239 [inline] __se_sys_sendmmsg net/socket.c:2236 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe irq event stamp: 346 hardirqs last enabled at (346): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (346): [] _raw_spin_unlock_irqrestore+0x6b/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (345): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (345): [] _raw_spin_lock_irqsave+0x6f/0xcd kernel/locking/spinlock.c:152 softirqs last enabled at (0): [] copy_process.part.0+0x15b2/0x7a60 kernel/fork.c:1840 softirqs last disabled at (323): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (323): [] irq_exit+0x180/0x1d0 kernel/softirq.c:412 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(rxrpc_conn_id_lock); lock(rxrpc_conn_id_lock); *** DEADLOCK *** 2 locks held by udevd/10656: #0: 00000000a0e28906 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x55/0x120 fs/exec.c:1404 #1: 00000000179587b6 (rcu_callback){....}, at: __rcu_reclaim kernel/rcu/rcu.h:226 [inline] #1: 00000000179587b6 (rcu_callback){....}, at: rcu_do_batch kernel/rcu/tree.c:2584 [inline] #1: 00000000179587b6 (rcu_callback){....}, at: invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] #1: 00000000179587b6 (rcu_callback){....}, at: __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] #1: 00000000179587b6 (rcu_callback){....}, at: rcu_process_callbacks+0xc79/0x1a30 kernel/rcu/tree.c:2881 stack backtrace: CPU: 0 PID: 10656 Comm: udevd Not tainted 4.19.105-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+0x197/0x210 lib/dump_stack.c:118 print_usage_bug.cold+0x330/0x42a kernel/locking/lockdep.c:2540 valid_state kernel/locking/lockdep.c:2553 [inline] mark_lock_irq kernel/locking/lockdep.c:2747 [inline] mark_lock+0xd1b/0x1370 kernel/locking/lockdep.c:3127 mark_irqflags kernel/locking/lockdep.c:3005 [inline] __lock_acquire+0xc62/0x49c0 kernel/locking/lockdep.c:3368 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] rxrpc_put_client_connection_id.part.0+0x19/0x70 net/rxrpc/conn_client.c:143 rxrpc_put_client_connection_id include/linux/spinlock.h:370 [inline] rxrpc_put_one_client_conn net/rxrpc/conn_client.c:956 [inline] rxrpc_put_client_conn+0x6c6/0xc20 net/rxrpc/conn_client.c:1002 rxrpc_put_connection net/rxrpc/ar-internal.h:951 [inline] rxrpc_rcu_destroy_call+0xbd/0x200 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+0xba0/0x1a30 kernel/rcu/tree.c:2881 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:slab_alloc mm/slab.c:3390 [inline] RIP: 0010:kmem_cache_alloc+0x287/0x700 mm/slab.c:3557 Code: 7e 0f 85 db fe ff ff e8 08 46 5e ff e9 d1 fe ff ff e8 3d f7 cd ff 48 83 3d 9d 35 50 07 00 0f 84 27 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 64 fe ff ff 31 d2 be a6 01 00 00 48 c7 c7 d2 1e RSP: 0018:ffff88805de67b20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 00000000006000c0 RCX: 1ffff1100be40964 RDX: 0000000000000000 RSI: ffff88805f204b00 RDI: 0000000000000286 RBP: ffff88805de67b88 R08: ffff88805f204280 R09: ffff88805f204b20 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808a5dc000 R13: ffff88821bc47980 R14: 00000000006000c0 R15: ffff88821bc47980 getname_kernel+0x53/0x370 fs/namei.c:220 open_exec+0x18/0x80 fs/exec.c:881 load_elf_binary+0x879/0x53a0 fs/binfmt_elf.c:780 search_binary_handler fs/exec.c:1653 [inline] search_binary_handler+0x179/0x570 fs/exec.c:1631 exec_binprm fs/exec.c:1695 [inline] __do_execve_file.isra.0+0x11fa/0x2110 fs/exec.c:1819 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1959 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f518c908207 Code: 77 19 f4 48 89 d7 44 89 c0 0f 05 48 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 f7 d8 64 41 89 01 eb df b8 3b 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 02 f3 c3 48 8b 15 00 8c 2d 00 f7 d8 64 89 02 RSP: 002b:00007ffd856d43a8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f518c908207 RDX: 000000000218ac30 RSI: 00007ffd856d44a0 RDI: 00007ffd856d54b0 RBP: 0000000000625500 R08: 0000000000001f2b R09: 0000000000001f2b R10: 0000000000000000 R11: 0000000000000202 R12: 000000000218ac30 R13: 0000000000000007 R14: 0000000001ff9030 R15: 0000000000000005 (unnamed net_device) (uninitialized): option arp_interval: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option arp_interval: allowed values 0 - 2147483647 (unnamed net_device) (uninitialized): option arp_interval: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option arp_interval: allowed values 0 - 2147483647 (unnamed net_device) (uninitialized): option arp_interval: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option arp_interval: allowed values 0 - 2147483647 (unnamed net_device) (uninitialized): option arp_interval: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option arp_interval: allowed values 0 - 2147483647 FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem audit: type=1804 audit(1582257653.543:59): pid=10993 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir584358269/syzkaller.Ef5ji2/119/file0" dev="sda1" ino=16877 res=1 FAT-fs (loop2): bogus number of reserved sectors raw_sendmsg: syz-executor.0 forgot to set AF_INET. Fix it! FAT-fs (loop2): Can't find a valid FAT filesystem audit: type=1804 audit(1582257653.703:60): pid=11008 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir584358269/syzkaller.Ef5ji2/120/file0" dev="sda1" ino=16883 res=1 audit: type=1800 audit(1582257653.823:61): pid=10989 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed comm="syz-executor.3" name="bus" dev="sda1" ino=16881 res=0 audit: type=1804 audit(1582257653.903:62): pid=11021 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir222280032/syzkaller.xb20A1/131/file0" dev="sda1" ino=16886 res=1 audit: type=1804 audit(1582257653.923:63): pid=11026 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir584358269/syzkaller.Ef5ji2/121/file0" dev="sda1" ino=16486 res=1 audit: type=1804 audit(1582257654.203:65): pid=11049 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir584358269/syzkaller.Ef5ji2/122/file0" dev="sda1" ino=16897 res=1 audit: type=1804 audit(1582257654.193:64): pid=11045 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir222280032/syzkaller.xb20A1/132/file0" dev="sda1" ino=16895 res=1 audit: type=1804 audit(1582257654.393:66): pid=11060 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir222280032/syzkaller.xb20A1/133/file0" dev="sda1" ino=16886 res=1 audit: type=1804 audit(1582257655.623:67): pid=11111 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir684011483/syzkaller.XxpwEM/108/file0" dev="sda1" ino=16887 res=1 audit: type=1804 audit(1582257655.693:68): pid=11113 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir637049514/syzkaller.Ekbfpv/109/file0" dev="sda1" ino=16906 res=1 SELinux: Context system_u:object_r is not valid (left unmapped).