================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295 Read of size 8 at addr ffff8880aaa858c8 by task syz-executor398/5761 CPU: 1 PID: 5761 Comm: syz-executor398 Not tainted 4.19.211-syzkaller #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+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 __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295 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] psock_map_pop.constprop.0+0x28/0x1f0 kernel/bpf/sockmap.c:302 bpf_tcp_remove+0x47d/0xa00 kernel/bpf/sockmap.c:366 bpf_tcp_close+0x12b/0x390 kernel/bpf/sockmap.c:403 inet_release+0xd7/0x1e0 net/ipv4/af_inet.c:427 __sock_release+0xcd/0x2a0 net/socket.c:599 sock_close+0x15/0x20 net/socket.c:1214 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f393e7f36a9 Code: 00 49 c7 c0 c0 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 RSP: 002b:00007ffc20c685a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f393e867310 RCX: 00007f393e7f36a9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00007ffc20c68630 R10: 00007ffc20c68630 R11: 0000000000000246 R12: 00007f393e867310 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Allocated by task 5761: kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 kmalloc_node include/linux/slab.h:553 [inline] kzalloc_node include/linux/slab.h:720 [inline] smap_init_psock kernel/bpf/sockmap.c:1636 [inline] __sock_map_ctx_update_elem.constprop.0+0x366/0xea0 kernel/bpf/sockmap.c:1940 sock_hash_ctx_update_elem.isra.0+0x69d/0x1100 kernel/bpf/sockmap.c:2411 sock_hash_update_elem+0x210/0x480 kernel/bpf/sockmap.c:2495 map_update_elem kernel/bpf/syscall.c:821 [inline] __do_sys_bpf kernel/bpf/syscall.c:2414 [inline] __se_sys_bpf+0x2cf1/0x3a20 kernel/bpf/syscall.c:2384 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8184: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 The buggy address belongs to the object at ffff8880aaa85680 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 584 bytes inside of 1024-byte region [ffff8880aaa85680, ffff8880aaa85a80) The buggy address belongs to the page: page:ffffea0002aaa100 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0xffff8880aaa84900 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea00024cf108 ffffea00026d5c08 ffff88813bff0ac0 raw: ffff8880aaa84900 ffff8880aaa84000 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880aaa85780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880aaa85800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880aaa85880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880aaa85900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880aaa85980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================