================================================================== 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 ffff88808ee14d98 by task syz-executor.3/16114 CPU: 1 PID: 16114 Comm: syz-executor.3 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 50 f4 d2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d 72 d9 94 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 bc a6 10 fa 65 8b 05 0d e3 c3 78 RSP: 0018:ffff8880527efb78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11a5e8a RBX: 0000000000000286 RCX: 1ffffffff134b5ce RDX: dffffc0000000000 RSI: ffffffff8177f1ae RDI: 0000000000000286 RBP: ffff8880527efb88 R08: ffff8880957a43c0 R09: ffffed1015d24db1 R10: ffffed1015d24db0 R11: ffff8880ae926d83 R12: ffff8880ae926d80 R13: ffff8880527efdc0 R14: 0000000000026d80 R15: ffff8880ae926e00 unlock_hrtimer_base kernel/time/hrtimer.c:877 [inline] hrtimer_start_range_ns+0x665/0xcb0 kernel/time/hrtimer.c:1108 hrtimer_start_expires include/linux/hrtimer.h:395 [inline] do_nanosleep+0x19b/0x6a0 kernel/time/hrtimer.c:1676 hrtimer_nanosleep+0x2a6/0x570 kernel/time/hrtimer.c:1733 __do_sys_nanosleep kernel/time/hrtimer.c:1767 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1754 [inline] __x64_sys_nanosleep+0x1a6/0x220 kernel/time/hrtimer.c:1754 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457d41 Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 d3 fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:0000000000a6fbd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000000000062 RCX: 0000000000457d41 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a6fbe0 RBP: 000000000075bfd4 R08: 000000000000000b R09: 00007f6b88d21700 R10: 00007f6b88d219d0 R11: 0000000000000293 R12: 000000000075bfc8 R13: 0000000000000003 R14: 0000000000000001 R15: 000000000075bfd4 Allocated by task 16112: 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 2: 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 ffff88808ee14d80 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 24 bytes inside of 1024-byte region [ffff88808ee14d80, ffff88808ee15180) The buggy address belongs to the page: page:ffffea00023b8500 refcount:1 mapcount:0 mapping:ffff8880aa400c40 index:0xffff88808ee15b00 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00029fb008 ffffea0002400c88 ffff8880aa400c40 raw: ffff88808ee15b00 ffff88808ee14000 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808ee14c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808ee14d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88808ee14d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88808ee14e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88808ee14e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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