================================================================== BUG: KASAN: use-after-free in rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline] BUG: KASAN: use-after-free in rxrpc_lookup_local+0xdcf/0xfb0 net/rxrpc/local_object.c:224 Read of size 2 at addr ffff8880755b521c by task syz-executor401/5081 CPU: 0 PID: 5081 Comm: syz-executor401 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xbf/0x1f0 mm/kasan/report.c:517 rxrpc_local_cmp_key net/rxrpc/local_object.c:53 [inline] rxrpc_lookup_local+0xdcf/0xfb0 net/rxrpc/local_object.c:224 rxrpc_bind+0x35e/0x5c0 net/rxrpc/af_rxrpc.c:150 __sys_bind+0x1ed/0x260 net/socket.c:1776 __do_sys_bind net/socket.c:1787 [inline] __se_sys_bind net/socket.c:1785 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1785 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f95adfddd59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffe4994e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 000000000000daff RCX: 00007f95adfddd59 RDX: 0000000000000024 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffe4994fc8 R09: 00007fffe4994fc8 R10: 00007fffe49948a0 R11: 0000000000000246 R12: 00007fffe4994e3c R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 Allocated by task 5077: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] rxrpc_alloc_local net/rxrpc/local_object.c:93 [inline] rxrpc_lookup_local+0x4d9/0xfb0 net/rxrpc/local_object.c:249 rxrpc_bind+0x35e/0x5c0 net/rxrpc/af_rxrpc.c:150 __sys_bind+0x1ed/0x260 net/socket.c:1776 __do_sys_bind net/socket.c:1787 [inline] __se_sys_bind net/socket.c:1785 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1785 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 0: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x3b0 mm/slub.c:3800 rcu_do_batch kernel/rcu/tree.c:2244 [inline] rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2504 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:488 __call_rcu_common.constprop.0+0x99/0x820 kernel/rcu/tree.c:2753 rxrpc_put_local.part.0+0x128/0x170 net/rxrpc/local_object.c:332 rxrpc_put_local+0x25/0x30 net/rxrpc/local_object.c:324 rxrpc_release_sock net/rxrpc/af_rxrpc.c:888 [inline] rxrpc_release+0x237/0x550 net/rxrpc/af_rxrpc.c:914 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x1c/0x20 net/socket.c:1365 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16f/0x270 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xaa8/0x2950 kernel/exit.c:867 do_group_exit+0xd4/0x2a0 kernel/exit.c:1010 __do_sys_exit_group kernel/exit.c:1021 [inline] __se_sys_exit_group kernel/exit.c:1019 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1019 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8880755b5000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 540 bytes inside of 1024-byte region [ffff8880755b5000, ffff8880755b5400) The buggy address belongs to the physical page: page:ffffea0001d56c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x755b0 head:ffffea0001d56c00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012041dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5069, tgid 5069 (sh), ts 55995988174, free_ts 55983834036 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119c/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1a4/0x430 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x4a/0xd0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] tomoyo_init_log+0x1282/0x1ec0 security/tomoyo/audit.c:275 tomoyo_supervisor+0x354/0xf10 security/tomoyo/common.c:2088 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x183/0x200 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x13d2/0x1f80 security/tomoyo/domain.c:879 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] tomoyo_bprm_check_security+0x133/0x1c0 security/tomoyo/tomoyo.c:91 security_bprm_check+0x49/0xb0 security/security.c:897 search_binary_handler fs/exec.c:1723 [inline] exec_binprm fs/exec.c:1777 [inline] bprm_execve fs/exec.c:1851 [inline] bprm_execve+0x732/0x19f0 fs/exec.c:1808 do_execveat_common+0x724/0x890 fs/exec.c:1956 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x65c/0xc00 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476 mt_alloc_one lib/maple_tree.c:152 [inline] mas_alloc_nodes+0x429/0x810 lib/maple_tree.c:1231 mas_node_count_gfp lib/maple_tree.c:1315 [inline] mas_preallocate+0x1bb/0x360 lib/maple_tree.c:5722 vma_expand+0x1d0/0xb80 mm/mmap.c:541 mmap_region+0x14bf/0x1dd0 mm/mmap.c:2588 do_mmap+0x831/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1af/0x280 mm/util.c:520 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1457 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff8880755b5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880755b5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880755b5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880755b5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880755b5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================