================================================================== BUG: KASAN: use-after-free in read_pnet include/net/net_namespace.h:361 [inline] BUG: KASAN: use-after-free in ib2_net include/net/inet_hashtables.h:116 [inline] BUG: KASAN: use-after-free in check_bind2_bucket_match net/ipv4/inet_hashtables.c:765 [inline] BUG: KASAN: use-after-free in inet_bind2_bucket_find+0x562/0x620 net/ipv4/inet_hashtables.c:819 Read of size 8 at addr ffff88807d118580 by task syz-executor.5/12929 CPU: 0 PID: 12929 Comm: syz-executor.5 Not tainted 5.19.0-rc1-syzkaller-00214-gfe43c0188911 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 read_pnet include/net/net_namespace.h:361 [inline] ib2_net include/net/inet_hashtables.h:116 [inline] check_bind2_bucket_match net/ipv4/inet_hashtables.c:765 [inline] inet_bind2_bucket_find+0x562/0x620 net/ipv4/inet_hashtables.c:819 __inet_hash_connect+0xaaa/0x1450 net/ipv4/inet_hashtables.c:949 dccp_v4_connect+0xc5c/0x16f0 net/dccp/ipv4.c:108 __inet_stream_connect+0x8cf/0xed0 net/ipv4/af_inet.c:660 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:724 __sys_connect_file+0x14f/0x190 net/socket.c:1979 io_connect+0x15f/0x690 fs/io_uring.c:6767 io_issue_sqe+0x342c/0x9750 fs/io_uring.c:8449 io_queue_sqe fs/io_uring.c:8791 [inline] io_submit_sqe fs/io_uring.c:9055 [inline] io_submit_sqes+0x161d/0x8000 fs/io_uring.c:9166 __do_sys_io_uring_enter+0x1112/0x2300 fs/io_uring.c:12098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f6ebfe89109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6ec0f0e168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f6ebff9bf60 RCX: 00007f6ebfe89109 RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000005 RBP: 00007f6ebfee30ad R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6ec04cfb1f R14: 00007f6ec0f0e300 R15: 0000000000022000 Allocated by task 12941: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3239 inet_bind2_bucket_create+0x37/0x360 net/ipv4/inet_hashtables.c:91 __inet_hash_connect+0xef5/0x1450 net/ipv4/inet_hashtables.c:951 dccp_v4_connect+0xc5c/0x16f0 net/dccp/ipv4.c:108 __inet_stream_connect+0x8cf/0xed0 net/ipv4/af_inet.c:660 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:724 __sys_connect_file+0x14f/0x190 net/socket.c:1979 io_connect+0x15f/0x690 fs/io_uring.c:6767 io_issue_sqe+0x342c/0x9750 fs/io_uring.c:8449 io_queue_sqe fs/io_uring.c:8791 [inline] io_submit_sqe fs/io_uring.c:9055 [inline] io_submit_sqes+0x161d/0x8000 fs/io_uring.c:9166 __do_sys_io_uring_enter+0x1112/0x2300 fs/io_uring.c:12098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 12941: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kmem_cache_free+0xdd/0x5a0 mm/slub.c:3524 inet_bind2_bucket_destroy net/ipv4/inet_hashtables.c:137 [inline] inet_bind2_bucket_destroy net/ipv4/inet_hashtables.c:133 [inline] __inet_put_port net/ipv4/inet_hashtables.c:174 [inline] inet_put_port+0x4a0/0x6f0 net/ipv4/inet_hashtables.c:182 dccp_set_state+0x1be/0x3a0 net/dccp/proto.c:103 dccp_done+0x19/0x100 net/dccp/proto.c:138 dccp_rcv_state_process+0xc31/0x1820 net/dccp/input.c:662 dccp_v4_do_rcv+0x112/0x1a0 net/dccp/ipv4.c:695 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2849 release_sock+0x54/0x1b0 net/core/sock.c:3404 inet_stream_connect+0x76/0xa0 net/ipv4/af_inet.c:725 __sys_connect_file+0x14f/0x190 net/socket.c:1979 io_connect+0x15f/0x690 fs/io_uring.c:6767 io_issue_sqe+0x342c/0x9750 fs/io_uring.c:8449 io_queue_sqe fs/io_uring.c:8791 [inline] io_submit_sqe fs/io_uring.c:9055 [inline] io_submit_sqes+0x161d/0x8000 fs/io_uring.c:9166 __do_sys_io_uring_enter+0x1112/0x2300 fs/io_uring.c:12098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88807d118580 which belongs to the cache dccp_bind2_bucket of size 56 The buggy address is located 0 bytes inside of 56-byte region [ffff88807d118580, ffff88807d1185b8) The buggy address belongs to the physical page: page:ffffea0001f44600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d118 memcg:ffff888021cb5601 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea00006e0400 dead000000000004 ffff88814a847500 raw: 0000000000000000 0000000080200020 00000001ffffffff ffff888021cb5601 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 9674, tgid 9656 (syz-executor.5), ts 526935180457, free_ts 526812305345 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5426 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1797 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x985/0xd90 mm/slub.c:3002 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089 slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3239 inet_bind2_bucket_create+0x37/0x360 net/ipv4/inet_hashtables.c:91 __inet_hash_connect+0xef5/0x1450 net/ipv4/inet_hashtables.c:951 dccp_v4_connect+0xc5c/0x16f0 net/dccp/ipv4.c:108 __inet_stream_connect+0x8cf/0xed0 net/ipv4/af_inet.c:660 inet_stream_connect+0x53/0xa0 net/ipv4/af_inet.c:724 __sys_connect_file+0x14f/0x190 net/socket.c:1979 io_connect+0x15f/0x690 fs/io_uring.c:6767 io_issue_sqe+0x342c/0x9750 fs/io_uring.c:8449 io_queue_sqe fs/io_uring.c:8791 [inline] io_req_task_submit+0xce/0x400 fs/io_uring.c:3110 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3438 rcu_do_batch kernel/rcu/tree.c:2578 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2838 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 Memory state around the buggy address: ffff88807d118480: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff88807d118500: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc >ffff88807d118580: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ^ ffff88807d118600: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff88807d118680: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ==================================================================