input: syz0 as /devices/virtual/input/input10
==================================================================
BUG: KASAN: use-after-free in sock_i_ino+0x94/0xa0 net/core/sock.c:1921
Read of size 8 at addr ffff8801ca4c51b0 by task syz-executor2/7828

CPU: 1 PID: 7828 Comm: syz-executor2 Not tainted 4.19.0-rc2+ #130
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+0x1c4/0x2b4 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 sock_i_ino+0x94/0xa0 net/core/sock.c:1921
 tipc_sk_fill_sock_diag+0x39c/0xd90 net/tipc/socket.c:3316
 __tipc_add_sock_diag+0x233/0x360 net/tipc/diag.c:62
 tipc_nl_sk_walk+0x122/0x1d0 net/tipc/socket.c:3250
 tipc_diag_dump+0x24/0x30 net/tipc/diag.c:73
 netlink_dump+0x519/0xd50 net/netlink/af_netlink.c:2233
 __netlink_dump_start+0x4f1/0x6f0 net/netlink/af_netlink.c:2329
 netlink_dump_start include/linux/netlink.h:213 [inline]
 tipc_sock_diag_handler_dump+0x28e/0x3d0 net/tipc/diag.c:91
 __sock_diag_cmd net/core/sock_diag.c:232 [inline]
 sock_diag_rcv_msg+0x31d/0x410 net/core/sock_diag.c:263
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2454
 sock_diag_rcv+0x2a/0x40 net/core/sock_diag.c:274
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:631
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2114
 __sys_sendmsg+0x11d/0x280 net/socket.c:2152
 __compat_sys_sendmsg net/compat.c:754 [inline]
 __do_compat_sys_sendmsg net/compat.c:761 [inline]
 __se_compat_sys_sendmsg net/compat.c:758 [inline]
 __ia32_compat_sys_sendmsg+0x7a/0xb0 net/compat.c:758
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f0bca9
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5f070cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000020000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 7828:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x730 mm/slab.c:3554
 sock_alloc_inode+0x1d/0x260 net/socket.c:244
 alloc_inode+0x63/0x190 fs/inode.c:210
 new_inode_pseudo+0x71/0x1a0 fs/inode.c:903
 sock_alloc+0x41/0x270 net/socket.c:547
 __sock_create+0x175/0x930 net/socket.c:1239
 sock_create net/socket.c:1315 [inline]
 __sys_socket+0x106/0x260 net/socket.c:1345
 __do_sys_socket net/socket.c:1354 [inline]
 __se_sys_socket net/socket.c:1352 [inline]
 __ia32_sys_socket+0x73/0xb0 net/socket.c:1352
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

Freed by task 7827:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x83/0x290 mm/slab.c:3756
 sock_destroy_inode+0x51/0x60 net/socket.c:272
 destroy_inode+0x159/0x200 fs/inode.c:267
 evict+0x5e0/0x980 fs/inode.c:575
 iput_final fs/inode.c:1547 [inline]
 iput+0x679/0xa90 fs/inode.c:1573
 dentry_unlink_inode+0x461/0x5e0 fs/dcache.c:374
 __dentry_kill+0x44c/0x7a0 fs/dcache.c:566
 dentry_kill+0xc9/0x5a0 fs/dcache.c:685
 dput.part.26+0x660/0x790 fs/dcache.c:846
 dput+0x15/0x20 fs/dcache.c:828
 __fput+0x4cf/0xa30 fs/file_table.c:291
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_32_irqs_on arch/x86/entry/common.c:341 [inline]
 do_fast_syscall_32+0xcd5/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

The buggy address belongs to the object at ffff8801ca4c5140
 which belongs to the cache sock_inode_cache(17:syz2) of size 984
The buggy address is located 112 bytes inside of
 984-byte region [ffff8801ca4c5140, ffff8801ca4c5518)
The buggy address belongs to the page:
page:ffffea0007293140 count:1 mapcount:0 mapping:ffff8801cb1d9680 index:0xffff8801ca4c5ffd
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0007293008 ffffea0006dc2648 ffff8801cb1d9680
raw: ffff8801ca4c5ffd ffff8801ca4c5140 0000000100000003 ffff8801c56b6ac0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8801c56b6ac0

Memory state around the buggy address:
 ffff8801ca4c5080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801ca4c5100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff8801ca4c5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff8801ca4c5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801ca4c5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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