fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 lib/fault-inject.c:149 should_failslab+0xd6/0x130 mm/failslab.c:32 ================================================================== slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x28e/0x3c0 mm/slab.c:3550 anon_vma_alloc mm/rmap.c:82 [inline] anon_vma_fork+0xe3/0x5a0 mm/rmap.c:342 BUG: KASAN: slab-out-of-bounds in tipc_nametbl_lookup_dst_nodes+0x4ad/0x4c0 net/tipc/name_table.c:670 Read of size 4 at addr ffff8880aa846150 by task syz-executor.1/9087 dup_mmap kernel/fork.c:664 [inline] dup_mm kernel/fork.c:1200 [inline] copy_mm kernel/fork.c:1255 [inline] copy_process.part.0+0x4c64/0x71c0 kernel/fork.c:1791 copy_process kernel/fork.c:1606 [inline] _do_fork+0x17a/0xcb0 kernel/fork.c:2092 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f4cb10840f9 RSP: 002b:00007f4caf5f6118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f4cb11a3f80 RCX: 00007f4cb10840f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000080084400 RBP: 00007f4caf5f61d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 R13: 00007fffa026f0ef R14: 00007f4caf5f6300 R15: 0000000000022000 CPU: 1 PID: 9087 Comm: syz-executor.1 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350 kasan_report mm/kasan/report.c:408 [inline] __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:428 tipc_nametbl_lookup_dst_nodes+0x4ad/0x4c0 net/tipc/name_table.c:670 tipc_sendmcast+0x51a/0xac0 net/tipc/socket.c:768 __tipc_sendmsg+0xbab/0xf90 net/tipc/socket.c:975 tipc_sendmsg+0x4c/0x70 net/tipc/socket.c:923 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f18dc8c80f9 RSP: 002b:00007f18dae3a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f18dc9e7f80 RCX: 00007f18dc8c80f9 RDX: 0000000000000840 RSI: 0000000020000680 RDI: 0000000000000005 RBP: 00007f18dc923ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc2ef1e9f R14: 00007f18dae3a300 R15: 0000000000022000 CPU: 0 PID: 9077 Comm: syz-executor.2 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Allocated by task 8027: Call Trace: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15a/0x400 mm/slab.c:3729 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10a/0x149 lib/fault-inject.c:149 tipc_nameseq_create+0x53/0x290 net/tipc/name_table.c:152 tipc_nametbl_insert_publ+0xb37/0x14e0 net/tipc/name_table.c:476 should_failslab+0xd6/0x130 mm/failslab.c:32 tipc_nametbl_publish+0x211/0x3f0 net/tipc/name_table.c:701 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc+0x40/0x3c0 mm/slab.c:3550 tipc_sk_publish net/tipc/socket.c:2206 [inline] tipc_bind+0x2c4/0x600 net/tipc/socket.c:630 anon_vma_chain_alloc mm/rmap.c:130 [inline] anon_vma_clone+0xd6/0x580 mm/rmap.c:270 tipc_create_listen_sock net/tipc/server.c:338 [inline] tipc_open_listening_sock net/tipc/server.c:396 [inline] tipc_server_start+0x31f/0x880 net/tipc/server.c:611 anon_vma_fork+0x82/0x5a0 mm/rmap.c:333 tipc_topsrv_start net/tipc/subscr.c:382 [inline] tipc_topsrv_init_net+0x53b/0x730 net/tipc/subscr.c:397 ops_init+0xaa/0x3e0 net/core/net_namespace.c:118 setup_net+0x22f/0x530 net/core/net_namespace.c:298 dup_mmap kernel/fork.c:664 [inline] dup_mm kernel/fork.c:1200 [inline] copy_mm kernel/fork.c:1255 [inline] copy_process.part.0+0x4c64/0x71c0 kernel/fork.c:1791 copy_net_ns+0x19b/0x440 net/core/net_namespace.c:422 create_new_namespaces+0x375/0x720 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xa1/0x1d0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2413 [inline] SyS_unshare+0x308/0x7f0 kernel/fork.c:2363 copy_process kernel/fork.c:1606 [inline] _do_fork+0x17a/0xcb0 kernel/fork.c:2092 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 Freed by task 1: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 aa_free_task_context+0xda/0x130 security/apparmor/context.c:54 apparmor_cred_free+0x34/0x70 security/apparmor/lsm.c:58 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 security_cred_free+0x71/0xb0 security/security.c:1003 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 put_cred_rcu+0xe3/0x300 kernel/cred.c:117 RIP: 0033:0x7f33cb2f70f9 __rcu_reclaim kernel/rcu/rcu.h:195 [inline] rcu_do_batch kernel/rcu/tree.c:2699 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline] rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946 RSP: 002b:00007f33c9869118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 RAX: ffffffffffffffda RBX: 00007f33cb416f80 RCX: 00007f33cb2f70f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000080084400 The buggy address belongs to the object at ffff8880aa846140 which belongs to the cache kmalloc-32 of size 32 RBP: 00007f33c98691d0 R08: 0000000000000000 R09: 0000000000000000 The buggy address is located 16 bytes inside of 32-byte region [ffff8880aa846140, ffff8880aa846160) R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 The buggy address belongs to the page: R13: 00007ffd5ab11e9f R14: 00007f33c9869300 R15: 0000000000022000 page:ffffea0002aa1180 count:1 mapcount:0 mapping:ffff8880aa846000 index:0xffff8880aa846fc1 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880aa846000 ffff8880aa846fc1 000000010000003e raw: ffffea0002bfe260 ffffea0002cb37a0 ffff88813fe741c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880aa846000: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ffff8880aa846080: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8880aa846100: fb fb fb fb fc fc fc fc 00 00 fc fc fc fc fc fc ^ ffff8880aa846180: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8880aa846200: 00 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================