ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): group descriptors corrupted! audit: type=1800 audit(1611705852.286:141): pid=19315 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18220 res=0 ====================================================== WARNING: possible circular locking dependency detected 4.14.217-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/19323 is trying to acquire lock: (&table[i].mutex){+.+.}, at: [] ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1092 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&xt[i].mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 xt_find_revision+0x88/0x200 net/netfilter/x_tables.c:373 nfnl_compat_get+0x1f7/0x870 net/netfilter/nft_compat.c:678 nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&table[i].mutex){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v1_destroy+0xd7/0x150 net/netfilter/xt_set.c:392 cleanup_entry+0x1fd/0x2d0 net/ipv4/netfilter/ip_tables.c:666 __do_replace+0x38d/0x570 net/ipv4/netfilter/ip_tables.c:1086 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x256/0x3a0 net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x94/0xb0 net/ipv4/ip_sockglue.c:1240 raw_setsockopt+0xac/0xd0 net/ipv4/raw.c:857 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x110/0x1e0 net/socket.c:1844 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&xt[i].mutex); lock(&table[i].mutex); lock(&xt[i].mutex); lock(&table[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor.5/19323: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1092 stack backtrace: CPU: 1 PID: 19323 Comm: syz-executor.5 Not tainted 4.14.217-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 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v1_destroy+0xd7/0x150 net/netfilter/xt_set.c:392 cleanup_entry+0x1fd/0x2d0 net/ipv4/netfilter/ip_tables.c:666 __do_replace+0x38d/0x570 net/ipv4/netfilter/ip_tables.c:1086 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x256/0x3a0 net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x94/0xb0 net/ipv4/ip_sockglue.c:1240 raw_setsockopt+0xac/0xd0 net/ipv4/raw.c:857 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x110/0x1e0 net/socket.c:1844 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007fd8626b7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000007 RBP: 000000000119c078 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020000140 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffdbc208a8f R14: 00007fd8626b89c0 R15: 000000000119c034 ip_tables: iptables: counters copy to user failed while replacing table audit: type=1800 audit(1611705853.126:142): pid=19336 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18250 res=0 ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): group descriptors corrupted! print_req_error: I/O error, dev loop0, sector 0 EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 6 Buffer I/O error on dev loop0, logical block 3, async page read EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! kauditd_printk_skb: 7 callbacks suppressed audit: type=1800 audit(1611705855.086:150): pid=19600 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=16424 res=0 audit: type=1800 audit(1611705855.236:151): pid=19615 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18245 res=0 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue audit: type=1800 audit(1611705855.316:152): pid=19632 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18033 res=0 EXT4-fs error (device loop0): ext4_readdir:240: inode #2: block 4: comm syz-executor.0: path /root/syzkaller-testdir758707252/syzkaller.mwei2T/1837/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=0, rec_len=0, name_len=0, size=1024 audit: type=1800 audit(1611705855.436:153): pid=19642 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18245 res=0 audit: type=1800 audit(1611705855.576:154): pid=19665 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=16421 res=0 EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! audit: type=1800 audit(1611705855.696:155): pid=19682 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18246 res=0 EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! audit: type=1800 audit(1611705855.936:156): pid=19704 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18246 res=0 EXT4-fs (loop0): group descriptors corrupted! audit: type=1800 audit(1611705856.096:157): pid=19726 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18245 res=0 EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! audit: type=1800 audit(1611705856.206:158): pid=19745 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=16422 res=0 audit: type=1800 audit(1611705856.416:159): pid=19764 uid=0 auid=0 ses=4 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=18264 res=0 EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop0): ext4_readdir:240: inode #2: block 4: comm syz-executor.0: path /root/syzkaller-testdir758707252/syzkaller.mwei2T/1841/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=0, rec_len=0, name_len=0, size=1024 EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop0): ext4_readdir:240: inode #2: block 4: comm syz-executor.0: path /root/syzkaller-testdir758707252/syzkaller.mwei2T/1848/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=0, rec_len=0, name_len=0, size=1024 ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): group descriptors corrupted! base_sock_release(ffff888053f720c0) sk=ffff88805e3d4340 base_sock_release(ffff888020dc8900) sk=ffff88809d8c2b80 ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Block bitmap for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! ip_tables: iptables: counters copy to user failed while replacing table EXT4-fs (loop0): ext4_check_descriptors: Inode table for group 0 not in group (block 0)! EXT4-fs (loop0): group descriptors corrupted! print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 6 Buffer I/O error on dev loop0, logical block 3, async page read kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 20405 Comm: syz-executor.4 Not tainted 4.14.217-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880601a8040 task.stack: ffff88809c1a8000 RIP: 0010:__rb_erase_augmented include/linux/rbtree_augmented.h:167 [inline] RIP: 0010:rb_erase+0x29/0x1290 lib/rbtree.c:459 RSP: 0018:ffff88809c1afa68 EFLAGS: 00010292 RAX: dffffc0000000000 RBX: ffff888053fec330 RCX: ffffc9000a8f8000 RDX: 0000000000000001 RSI: ffffffff8bf93da0 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880601a8040 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888054dbc438 R15: ffffffff8bf93da0 FS: 00007f34db4a5700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31722000 CR3: 000000004ff9a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: integrity_inode_free+0x119/0x300 security/integrity/iint.c:146 security_inode_free+0x14/0x80 security/security.c:443 __destroy_inode+0x1e8/0x4d0 fs/inode.c:238 destroy_inode+0x49/0x110 fs/inode.c:265 iput_final fs/inode.c:1524 [inline] iput+0x458/0x7e0 fs/inode.c:1551 swap_inode_boot_loader fs/ext4/ioctl.c:197 [inline] ext4_ioctl+0x16c5/0x3870 fs/ext4/ioctl.c:924 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e219 RSP: 002b:00007f34db4a4c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffe86e9363f R14: 00007f34db4a59c0 R15: 000000000119bf8c Code: ff ff 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 41 54 49 89 fc 48 83 c7 08 48 89 fa 55 48 c1 ea 03 53 48 83 ec 18 <80> 3c 02 00 0f 85 f2 0c 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 RIP: __rb_erase_augmented include/linux/rbtree_augmented.h:167 [inline] RSP: ffff88809c1afa68 RIP: rb_erase+0x29/0x1290 lib/rbtree.c:459 RSP: ffff88809c1afa68 ---[ end trace ca019cbce31bd88d ]---