ip_tables: iptables: counters copy to user failed while replacing table netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. ip_tables: iptables: counters copy to user failed while replacing table ntfs: volume version 3.1. ============================= WARNING: suspicious RCU usage 4.14.281-syzkaller #0 Not tainted ----------------------------- net/netfilter/nf_queue.c:244 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor.3/8006: #0: (rcu_callback){....}, at: [] __rcu_reclaim kernel/rcu/rcu.h:185 [inline] #0: (rcu_callback){....}, at: [] rcu_do_batch kernel/rcu/tree.c:2699 [inline] #0: (rcu_callback){....}, at: [] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] #0: (rcu_callback){....}, at: [] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] #0: (rcu_callback){....}, at: [] rcu_process_callbacks+0x84e/0x1180 kernel/rcu/tree.c:2946 #1: (&(&inst->lock)->rlock#2){+.-.}, at: [] spin_lock_bh include/linux/spinlock.h:322 [inline] #1: (&(&inst->lock)->rlock#2){+.-.}, at: [] nfqnl_flush+0x2f/0x2a0 net/netfilter/nfnetlink_queue.c:232 stack backtrace: CPU: 0 PID: 8006 Comm: syz-executor.3 Not tainted 4.14.281-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nf_reinject+0x56e/0x700 net/netfilter/nf_queue.c:244 nfqnl_flush+0x1ab/0x2a0 net/netfilter/nfnetlink_queue.c:237 instance_destroy_rcu+0x19/0x30 net/netfilter/nfnetlink_queue.c:171 __rcu_reclaim kernel/rcu/rcu.h:195 [inline] rcu_do_batch kernel/rcu/tree.c:2699 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__raw_write_unlock_irq include/linux/rwlock_api_smp.h:268 [inline] RIP: 0010:_raw_write_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:344 RSP: 0018:ffff88809d06faa0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e1313 RBX: ffff88809f9d4180 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff88809e8d4cc4 RBP: ffffffff88e09080 R08: ffffffff8b9b8420 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805e66cd80 R13: ffff88809f9d4180 R14: ffff88809f9d4720 R15: dffffc0000000000 release_task+0xbc7/0x1380 kernel/exit.c:221 wait_task_zombie kernel/exit.c:1158 [inline] wait_consider_task+0x2a24/0x3350 kernel/exit.c:1385 do_wait_thread kernel/exit.c:1448 [inline] do_wait+0x3e9/0x930 kernel/exit.c:1519 kernel_wait4+0x107/0x1e0 kernel/exit.c:1661 SYSC_wait4 kernel/exit.c:1673 [inline] SyS_wait4+0xfe/0x110 kernel/exit.c:1669 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f4d1120c5a7 RSP: 002b:00007ffd3ec9ca70 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000016e RCX: 00007f4d1120c5a7 RDX: 0000000040000001 RSI: 00007ffd3ec9cafc RDI: 00000000ffffffff RBP: 00007ffd3ec9cafc R08: 0000000000000000 R09: 00000031f2849f25 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000002e4ad R14: 0000000000000006 R15: 00007ffd3ec9cb60 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. ip_tables: iptables: counters copy to user failed while replacing table ntfs: volume version 3.1. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. ip_tables: iptables: counters copy to user failed while replacing table ntfs: volume version 3.1. EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue ISOFS: Logical zone size(0) < hardware blocksize(1024) print_req_error: I/O error, dev loop3, sector 0 ISOFS: Logical zone size(0) < hardware blocksize(1024) EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue ISOFS: Logical zone size(0) < hardware blocksize(1024) ISOFS: Logical zone size(0) < hardware blocksize(1024) kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns audit: type=1800 audit(1654304346.760:24): pid=13673 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=13 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns audit: type=1800 audit(1654304347.510:25): pid=13744 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=14 res=0 audit: type=1800 audit(1654304347.720:26): pid=13762 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="loop0" ino=15 res=0 kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns audit: type=1800 audit(1654304347.770:27): pid=13781 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="loop3" ino=16 res=0 audit: type=1800 audit(1654304347.960:28): pid=13798 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=17 res=0 FAT-fs (loop0): bogus number of reserved sectors FAT-fs (loop0): Can't find a valid FAT filesystem audit: type=1800 audit(1654304348.460:29): pid=13829 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=18 res=0 audit: type=1800 audit(1654304348.730:30): pid=13859 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="loop3" ino=19 res=0 audit: type=1800 audit(1654304348.850:31): pid=13862 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="loop0" ino=20 res=0