================================================================== 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+0x449/0x790 net/ipv4/inet_hashtables.c:819 Read of size 8 at addr ffff88806838b880 by task syz-executor.3/11695 CPU: 1 PID: 11695 Comm: syz-executor.3 Not tainted 5.18.0-rc7-syzkaller #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+0x57/0x7d 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+0x449/0x790 net/ipv4/inet_hashtables.c:819 __inet_hash_connect+0x8de/0x12b0 net/ipv4/inet_hashtables.c:949 dccp_v4_connect+0xb1e/0x1750 net/dccp/ipv4.c:108 __inet_stream_connect+0x6d5/0xd10 net/ipv4/af_inet.c:660 inet_stream_connect+0x4e/0xa0 net/ipv4/af_inet.c:724 io_connect+0x27b/0x550 fs/io_uring.c:5690 io_issue_sqe+0x193a/0x75c0 fs/io_uring.c:7187 __io_queue_sqe fs/io_uring.c:7515 [inline] io_queue_sqe fs/io_uring.c:7557 [inline] io_submit_sqe fs/io_uring.c:7762 [inline] io_submit_sqes+0x1b37/0x8210 fs/io_uring.c:7868 __do_sys_io_uring_enter+0x9a0/0x1a60 fs/io_uring.c:10813 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+0x44/0xae RIP: 0033:0x7fcec3c89109 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:00007fcec4d39168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fcec3d9bf60 RCX: 00007fcec3c89109 RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000003 RBP: 00007fcec3ce308d R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2079ceaf R14: 00007fcec4d39300 R15: 0000000000022000 Allocated by task 11698: 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:749 [inline] slab_alloc_node mm/slub.c:3217 [inline] slab_alloc mm/slub.c:3225 [inline] __kmem_cache_alloc_lru mm/slub.c:3232 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3242 inet_bind2_bucket_create+0x2a/0x380 net/ipv4/inet_hashtables.c:91 __inet_hash_connect+0xc83/0x12b0 net/ipv4/inet_hashtables.c:951 dccp_v4_connect+0xb1e/0x1750 net/dccp/ipv4.c:108 __inet_stream_connect+0x6d5/0xd10 net/ipv4/af_inet.c:660 inet_stream_connect+0x4e/0xa0 net/ipv4/af_inet.c:724 io_connect+0x27b/0x550 fs/io_uring.c:5690 io_issue_sqe+0x193a/0x75c0 fs/io_uring.c:7187 __io_queue_sqe fs/io_uring.c:7515 [inline] io_queue_sqe fs/io_uring.c:7557 [inline] io_submit_sqe fs/io_uring.c:7762 [inline] io_submit_sqes+0x1b37/0x8210 fs/io_uring.c:7868 __do_sys_io_uring_enter+0x9a0/0x1a60 fs/io_uring.c:10813 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+0x44/0xae Freed by task 11698: 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:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kmem_cache_free+0xdd/0x5a0 mm/slub.c:3527 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+0x456/0x720 net/ipv4/inet_hashtables.c:182 dccp_set_state+0x137/0x2b0 net/dccp/proto.c:103 dccp_done+0x10/0xd0 net/dccp/proto.c:138 dccp_rcv_state_process+0x916/0x1340 net/dccp/input.c:662 dccp_v4_do_rcv+0xd8/0x150 net/dccp/ipv4.c:695 sk_backlog_rcv include/net/sock.h:1061 [inline] __release_sock+0x113/0x360 net/core/sock.c:2849 release_sock+0x4a/0x170 net/core/sock.c:3404 inet_stream_connect+0x71/0xa0 net/ipv4/af_inet.c:725 io_connect+0x27b/0x550 fs/io_uring.c:5690 io_issue_sqe+0x193a/0x75c0 fs/io_uring.c:7187 __io_queue_sqe fs/io_uring.c:7515 [inline] io_queue_sqe fs/io_uring.c:7557 [inline] io_submit_sqe fs/io_uring.c:7762 [inline] io_submit_sqes+0x1b37/0x8210 fs/io_uring.c:7868 __do_sys_io_uring_enter+0x9a0/0x1a60 fs/io_uring.c:10813 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+0x44/0xae The buggy address belongs to the object at ffff88806838b880 which belongs to the cache dccp_bind2_bucket of size 56 The buggy address is located 0 bytes inside of 56-byte region [ffff88806838b880, ffff88806838b8b8) The buggy address belongs to the physical page: page:ffffea0001a0e2c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6838b memcg:ffff88801958be01 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001a67a00 dead000000000002 ffff888021fea140 raw: 0000000000000000 0000000000200020 00000001ffffffff ffff88801958be01 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 4243, tgid 4242 (syz-executor.3), ts 76303355335, free_ts 9989963057 prep_new_page mm/page_alloc.c:2441 [inline] get_page_from_freelist+0x178d/0x3dc0 mm/page_alloc.c:4182 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x8e1/0xf20 mm/slub.c:3005 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092 slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] __kmem_cache_alloc_lru mm/slub.c:3232 [inline] kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3242 inet_bind2_bucket_create+0x2a/0x380 net/ipv4/inet_hashtables.c:91 __inet_hash_connect+0xc83/0x12b0 net/ipv4/inet_hashtables.c:951 dccp_v4_connect+0xb1e/0x1750 net/dccp/ipv4.c:108 __inet_stream_connect+0x6d5/0xd10 net/ipv4/af_inet.c:660 inet_stream_connect+0x4e/0xa0 net/ipv4/af_inet.c:724 io_connect+0x27b/0x550 fs/io_uring.c:5690 io_issue_sqe+0x193a/0x75c0 fs/io_uring.c:7187 __io_queue_sqe fs/io_uring.c:7515 [inline] io_req_task_submit+0xaa/0x5e0 fs/io_uring.c:2578 handle_tw_list fs/io_uring.c:2463 [inline] tctx_task_work+0x550/0xf50 fs/io_uring.c:2497 task_work_run+0xc0/0x160 kernel/task_work.c:164 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1356 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1406 free_unref_page_prepare mm/page_alloc.c:3328 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3423 free_contig_range+0xb1/0x180 mm/page_alloc.c:9418 destroy_args+0x7e/0x503 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x1fc8/0x204c mm/debug_vm_pgtable.c:1332 do_one_initcall+0xbe/0x440 init/main.c:1298 do_initcall_level init/main.c:1371 [inline] do_initcalls init/main.c:1387 [inline] do_basic_setup init/main.c:1406 [inline] kernel_init_freeable+0x5ab/0x605 init/main.c:1613 kernel_init+0x14/0x130 init/main.c:1502 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff88806838b780: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff88806838b800: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc >ffff88806838b880: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ^ ffff88806838b900: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff88806838b980: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ==================================================================