audit: type=1804 audit(1660563953.677:48): pid=22403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir333245796/syzkaller.YOsOjz/604/file0" dev="sda1" ino=15184 res=1 ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x2cb4/0x3ff0 kernel/locking/lockdep.c:3295 Read of size 8 at addr ffff888095512248 by task syz-executor.1/22399 CPU: 1 PID: 22399 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath+0x3f0/0x4a0 arch/x86/entry/common.c:271 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:407 RIP: 0033:0x7faf29cbc6a1 Code: Bad RIP value. RSP: 002b:00007faf284a42f0 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007faf284a4700 RCX: 00007faf29cbc6a1 RDX: 00007faf284a49d0 RSI: 00007faf284a42f0 RDI: 00000000003d0f00 RBP: 00007ffdf1768c10 R08: 00007faf284a4700 R09: 00007faf284a4700 R10: 00007faf284a49d0 R11: 0000000000000206 R12: 00007ffdf1768a7e R13: 00007ffdf1768a7f R14: 00007faf284a4300 R15: 0000000000022000 Allocated by task 22380: 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 audit: type=1804 audit(1660563953.677:49): pid=22403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir333245796/syzkaller.YOsOjz/604/file0" dev="sda1" ino=15184 res=1 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 8405: __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 ffff888095512000 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 584 bytes inside of 1024-byte region [ffff888095512000, ffff888095512400) The buggy address belongs to the page: page:ffffea0002554480 count:1 mapcount:0 mapping:ffff88813bff0ac0 index:0xffff888095513b00 compound_mapcount: 0 flags: 0xfff00000008100(slab|head) raw: 00fff00000008100 ffffea0002af4b08 ffffea0002cce088 ffff88813bff0ac0 audit: type=1804 audit(1660563953.677:50): pid=22403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir333245796/syzkaller.YOsOjz/604/file0" dev="sda1" ino=15184 res=1 raw: ffff888095513b00 ffff888095512000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888095512100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888095512180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888095512200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888095512280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb audit: type=1804 audit(1660563953.677:51): pid=22403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir333245796/syzkaller.YOsOjz/604/file0" dev="sda1" ino=15184 res=1 ffff888095512300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================