================================================================== BUG: KASAN: use-after-free in __rxrpc_put_peer net/rxrpc/peer_object.c:411 [inline] BUG: KASAN: use-after-free in rxrpc_put_peer+0x685/0x6a0 net/rxrpc/peer_object.c:435 Read of size 8 at addr ffff8880a8bfc918 by task udevd/3907 CPU: 0 PID: 3907 Comm: udevd Not tainted 5.3.0-rc7+ #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+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0xd4/0x306 mm/kasan/report.c:351 __kasan_report.cold+0x1b/0x36 mm/kasan/report.c:482 kasan_report+0x12/0x17 mm/kasan/common.c:618 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __rxrpc_put_peer net/rxrpc/peer_object.c:411 [inline] rxrpc_put_peer+0x685/0x6a0 net/rxrpc/peer_object.c:435 rxrpc_rcu_destroy_call+0x5e/0x140 net/rxrpc/call_object.c:564 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2114 [inline] rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] RIP: 0010:kfree+0x239/0x2c0 mm/slab.c:3757 Code: 55 7e 0f 85 20 fe ff ff e8 14 2f 54 ff e9 16 fe ff ff e8 ca b8 cb ff 48 83 3d c2 bb 26 07 00 0f 84 85 00 00 00 48 89 df 57 9d <0f> 1f 44 00 00 5b 41 5c 41 5d 41 5e 5d c3 e8 a4 b8 cb ff 48 83 3d RSP: 0018:ffff888096667bb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: 0000000000000286 RCX: 1ffffffff134b5de RDX: 0000000000000000 RSI: ffffffff8177f1ae RDI: 0000000000000286 RBP: ffff888096667bd0 R08: ffff88809665e580 R09: fffffbfff134afa0 R10: fffffbfff134af9f R11: ffffffff89a57cff R12: ffff888098f73e40 R13: ffff8880aa4001c0 R14: ffffffff830503f9 R15: ffff888096667da0 tomoyo_path_number_perm+0x459/0x520 security/tomoyo/file.c:736 tomoyo_file_ioctl+0x23/0x30 security/tomoyo/tomoyo.c:335 security_file_ioctl+0x77/0xc0 security/security.c:1369 ksys_ioctl+0x57/0xd0 fs/ioctl.c:711 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7febd1b9c347 Code: 90 90 90 48 8b 05 f1 fa 2a 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 90 90 90 90 90 90 90 90 90 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 fa 2a 00 31 d2 48 29 c2 64 RSP: 002b:00007fffd24fc638 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006254a0 RCX: 00007febd1b9c347 RDX: 00007fffd24fc6bc RSI: 000000000000541b RDI: 0000000000000006 RBP: 00000000025e2230 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000025f8090 R15: 00000000025df250 Allocated by task 23117: save_stack+0x23/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:493 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:466 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:507 kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3550 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:748 [inline] rxrpc_alloc_local net/rxrpc/local_object.c:79 [inline] rxrpc_lookup_local+0x562/0x1ba0 net/rxrpc/local_object.c:277 rxrpc_sendmsg+0x379/0x5f0 net/rxrpc/af_rxrpc.c:566 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x3e2/0x920 net/socket.c:2311 __sys_sendmmsg+0x1bf/0x4d0 net/socket.c:2413 __do_sys_sendmmsg net/socket.c:2442 [inline] __se_sys_sendmmsg net/socket.c:2439 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2439 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 16: save_stack+0x23/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:455 kasan_slab_free+0xe/0x10 mm/kasan/common.c:463 __cache_free mm/slab.c:3425 [inline] kfree+0x10a/0x2c0 mm/slab.c:3756 rxrpc_local_rcu+0x62/0x80 net/rxrpc/local_object.c:499 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2114 [inline] rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0x262/0x98c kernel/softirq.c:292 The buggy address belongs to the object at ffff8880a8bfc900 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 24 bytes inside of 1024-byte region [ffff8880a8bfc900, ffff8880a8bfcd00) The buggy address belongs to the page: page:ffffea0002a2ff00 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea0002a1e808 ffffea00023a8808 ffff8880aa400c40 raw: 0000000000000000 ffff8880a8bfc000 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a8bfc800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a8bfc880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a8bfc900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a8bfc980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a8bfca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================