netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. ip_tables: iptables: counters copy to user failed while replacing table UDF-fs: Scanning with blocksize 512 failed ip_tables: iptables: counters copy to user failed while replacing table ============================= 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 3 locks held by syz-executor.3/9696: #0: (&type->s_umount_key#48/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#48/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 #1: (rcu_callback){....}, at: [] __rcu_reclaim kernel/rcu/rcu.h:185 [inline] #1: (rcu_callback){....}, at: [] rcu_do_batch kernel/rcu/tree.c:2699 [inline] #1: (rcu_callback){....}, at: [] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] #1: (rcu_callback){....}, at: [] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] #1: (rcu_callback){....}, at: [] rcu_process_callbacks+0x84e/0x1180 kernel/rcu/tree.c:2946 #2: (&(&inst->lock)->rlock){+.-.}, at: [] spin_lock_bh include/linux/spinlock.h:322 [inline] #2: (&(&inst->lock)->rlock){+.-.}, at: [] nfqnl_flush+0x2f/0x2a0 net/netfilter/nfnetlink_queue.c:232 stack backtrace: CPU: 1 PID: 9696 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:orc_find arch/x86/kernel/unwind_orc.c:109 [inline] RIP: 0010:unwind_next_frame+0x4dc/0x17d0 arch/x86/kernel/unwind_orc.c:348 RSP: 0018:ffff88809f9d7290 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000003 RBX: 1ffff11013f3ae59 RCX: ffffffff87400089 RDX: 0000000000064000 RSI: 0000000000064000 RDI: ffffffff8b002980 RBP: 0000000000000001 R08: 0000000000064001 R09: 0000000000000001 R10: 00000000001467c1 R11: 0000000000066071 R12: ffff88809f9d7385 R13: ffff88809f9d7388 R14: ffff88809f9d73a0 R15: ffff88809f9d7350 __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550 mempool_alloc+0x10e/0x2d0 mm/mempool.c:330 bio_alloc_bioset+0x41b/0x830 block/bio.c:486 bio_alloc include/linux/bio.h:422 [inline] submit_bh_wbc+0xf5/0x6f0 fs/buffer.c:3121 submit_bh fs/buffer.c:3153 [inline] __bread_slow fs/buffer.c:1238 [inline] __bread_gfp+0x11c/0x2e0 fs/buffer.c:1431 sb_bread include/linux/buffer_head.h:309 [inline] udf_tread+0xe1/0x130 fs/udf/misc.c:44 udf_read_tagged+0x40/0x4c0 fs/udf/misc.c:219 udf_check_anchor_block+0x18a/0x590 fs/udf/super.c:1823 udf_scan_anchors+0x350/0x530 fs/udf/super.c:1893 udf_find_anchor fs/udf/super.c:1920 [inline] udf_load_vrs+0x5a1/0xa90 fs/udf/super.c:1985 udf_fill_super+0x715/0x1660 fs/udf/super.c:2177 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f017955263a RSP: 002b:00007f0177ec5f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000e00 RCX: 00007f017955263a RDX: 00000000200000c0 RSI: 0000000020000700 RDI: 00007f0177ec5fe0 RBP: 00007f0177ec6020 R08: 00007f0177ec6020 R09: 00000000200000c0 R10: 0000000000000810 R11: 0000000000000206 R12: 00000000200000c0 R13: 0000000020000700 R14: 00007f0177ec5fe0 R15: 0000000020000880 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop3): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed ip_tables: iptables: counters copy to user failed while replacing table cannot load conntrack support for proto=2 ip_tables: iptables: counters copy to user failed while replacing table UDF-fs: error (device loop3): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it ip_tables: iptables: counters copy to user failed while replacing table UDF-fs: error (device loop3): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it UDF-fs: Scanning with blocksize 512 failed cannot load conntrack support for proto=2 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: error (device loop5): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop5): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop3): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed cannot load conntrack support for proto=2 UDF-fs: error (device loop3): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it UDF-fs: error (device loop3): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it cannot load conntrack support for proto=2 UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop5): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it UDF-fs: error (device loop5): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop3): udf_load_vrs: No VRS found UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed cannot load conntrack support for proto=2 UDF-fs: error (device loop3): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it UDF-fs: error (device loop3): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed cannot load conntrack support for proto=2 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop5): udf_process_sequence: Block 99 of volume descriptor sequence is corrupted or we could not read it UDF-fs: warning (device loop3): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop5): udf_process_sequence: Block 1984 of volume descriptor sequence is corrupted or we could not read it UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs: failed to create workqueue EXT4-fs (loop0): mount failed EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 EXT4-fs: failed to create workqueue EXT4-fs (loop0): mount failed EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue