loop3: p103 start 10 is beyond EOD, truncated loop3: p104 start 10 is beyond EOD, truncated loop3: p105 start 10 is beyond EOD, truncated ================================================================== loop3: p106 start 10 is beyond EOD, truncated BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295 Read of size 8 at addr ffff888095c4a2a0 by task kworker/0:1/14 CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: events l2cap_chan_timeout Call Trace: loop3: p107 start 10 is beyond EOD, truncated __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433 loop3: p108 start 10 is beyond EOD, truncated __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295 loop3: p109 start 10 is beyond EOD, truncated loop3: p110 start 10 is beyond EOD, truncated loop3: p111 start 10 is beyond EOD, truncated loop3: p112 start 10 is beyond EOD, truncated lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] lock_sock_nested+0x3b/0x110 net/core/sock.c:2884 l2cap_sock_teardown_cb+0xa0/0x6d0 net/bluetooth/l2cap_sock.c:1348 loop3: p113 start 10 is beyond EOD, truncated loop3: p114 start 10 is beyond EOD, truncated l2cap_chan_del+0xbc/0xa50 net/bluetooth/l2cap_core.c:603 l2cap_chan_close+0x1b5/0x950 net/bluetooth/l2cap_core.c:761 l2cap_chan_timeout+0x17e/0x2f0 net/bluetooth/l2cap_core.c:430 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 loop3: p115 start 10 is beyond EOD, truncated loop3: p116 start 10 is beyond EOD, truncated worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 loop3: p117 start 10 is beyond EOD, truncated loop3: p118 start 10 is beyond EOD, truncated ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Allocated by task 21702: kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] perf_event_alloc.part.0+0xb9/0x2eb0 kernel/events/core.c:10072 perf_event_alloc kernel/events/core.c:11529 [inline] inherit_event.constprop.0+0x1df/0x960 kernel/events/core.c:11446 inherit_group kernel/events/core.c:11551 [inline] inherit_task_group kernel/events/core.c:11609 [inline] inherit_task_group.isra.0+0xb5/0x360 kernel/events/core.c:11581 loop3: p119 start 10 is beyond EOD, truncated perf_event_init_context kernel/events/core.c:11676 [inline] perf_event_init_task+0x36d/0x760 kernel/events/core.c:11728 loop3: p120 start 10 is beyond EOD, truncated copy_process.part.0+0x18a0/0x8260 kernel/fork.c:1887 copy_process kernel/fork.c:1710 [inline] _do_fork+0x22f/0xf30 kernel/fork.c:2219 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 21700: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881 __do_softirq+0x265/0x980 kernel/softirq.c:292 loop3: p121 start 10 is beyond EOD, truncated The buggy address belongs to the object at ffff888095c4a200 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 160 bytes inside of 2048-byte region [ffff888095c4a200, ffff888095c4aa00) loop3: p122 start 10 is beyond EOD, truncated The buggy address belongs to the page: page:ffffea0002571280 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0xffff888095c4b300 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea00023d2c08 ffffea000264f208 ffff88813bff0c40 raw: ffff888095c4b300 ffff888095c4a200 0000000100000002 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888095c4a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888095c4a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888095c4a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb loop3: p123 start 10 is beyond EOD, truncated ^ loop3: p124 start 10 is beyond EOD, truncated ffff888095c4a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888095c4a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================