================================================================== BUG: KASAN: slab-out-of-bounds in __read_once_size include/linux/compiler.h:199 [inline] BUG: KASAN: slab-out-of-bounds in sock_cgroup_ptr include/linux/cgroup.h:836 [inline] BUG: KASAN: slab-out-of-bounds in inet_diag_bc_sk+0xb64/0xc70 net/ipv4/inet_diag.c:749 Read of size 8 at addr ffff88805b1771c0 by task syz-executor.3/23716 CPU: 0 PID: 23716 Comm: syz-executor.3 Not tainted 5.7.0-rc2-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+0x188/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 __read_once_size include/linux/compiler.h:199 [inline] sock_cgroup_ptr include/linux/cgroup.h:836 [inline] inet_diag_bc_sk+0xb64/0xc70 net/ipv4/inet_diag.c:749 inet_diag_dump_icsk+0xbe4/0x1306 net/ipv4/inet_diag.c:1061 __inet_diag_dump+0x8d/0x240 net/ipv4/inet_diag.c:1113 netlink_dump+0x50b/0xf50 net/netlink/af_netlink.c:2245 __netlink_dump_start+0x63f/0x910 net/netlink/af_netlink.c:2353 netlink_dump_start include/linux/netlink.h:246 [inline] inet_diag_handler_cmd+0x263/0x2c0 net/ipv4/inet_diag.c:1278 __sock_diag_cmd net/core/sock_diag.c:233 [inline] sock_diag_rcv_msg+0x2fe/0x3e0 net/core/sock_diag.c:264 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:275 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 sock_write_iter+0x289/0x3c0 net/socket.c:1004 call_write_iter include/linux/fs.h:1907 [inline] do_iter_readv_writev+0x5a8/0x850 fs/read_write.c:694 do_iter_write fs/read_write.c:999 [inline] do_iter_write+0x18b/0x600 fs/read_write.c:980 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1072 do_writev+0x27f/0x300 fs/read_write.c:1115 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6d99d0dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000050d140 RCX: 000000000045c829 RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000008 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000d18 R14: 00000000004cb1f4 R15: 00007f6d99d0e6d4 Allocated by task 377: save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x11b/0x740 mm/slab.c:3484 __nf_conntrack_alloc+0xd6/0x6b0 net/netfilter/nf_conntrack_core.c:1509 init_conntrack.isra.0+0xd7e/0x1080 net/netfilter/nf_conntrack_core.c:1588 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1686 [inline] nf_conntrack_in+0x9ae/0x12b0 net/netfilter/nf_conntrack_core.c:1846 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xba/0x1e0 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:262 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ip6_xmit+0x11a1/0x2090 net/ipv6/ip6_output.c:280 inet6_csk_xmit+0x339/0x610 net/ipv6/inet6_connection_sock.c:135 __tcp_transmit_skb+0x1a0f/0x3760 net/ipv4/tcp_output.c:1238 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline] tcp_connect+0x2d06/0x42a0 net/ipv4/tcp_output.c:3669 tcp_v6_connect+0x153c/0x2150 net/ipv6/tcp_ipv6.c:334 __inet_stream_connect+0x80f/0xe30 net/ipv4/af_inet.c:655 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:719 rds_tcp_conn_path_connect+0x620/0x880 net/rds/tcp_connect.c:172 rds_connect_worker+0x1a5/0x2c0 net/rds/threads.c:176 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff88805b177080 which belongs to the cache nf_conntrack of size 320 The buggy address is located 0 bytes to the right of 320-byte region [ffff88805b177080, ffff88805b1771c0) The buggy address belongs to the page: page:ffffea00016c5dc0 refcount:1 mapcount:0 mapping:00000000f0567478 index:0xffff88805b177ff6 flags: 0xfffe0000000200(slab) raw: 00fffe0000000200 ffffea0001201f08 ffffea000262f248 ffff8880a3d04540 raw: ffff88805b177ff6 ffff88805b177080 000000010000000a 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88805b177080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805b177100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805b177180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88805b177200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805b177280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================