================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x78/0x1f80 kernel/locking/lockdep.c:4923 Read of size 8 at addr ffff88801db82130 by task syz-executor.4/24371 CPU: 0 PID: 24371 Comm: syz-executor.4 Not tainted 5.19.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 __lock_acquire+0x78/0x1f80 kernel/locking/lockdep.c:4923 lock_acquire+0x1a7/0x400 kernel/locking/lockdep.c:5665 lock_sock_nested+0x44/0xf0 net/core/sock.c:3389 lock_sock include/net/sock.h:1691 [inline] nr_accept+0x510/0x660 net/netrom/af_netrom.c:805 do_accept+0x4d0/0x6d0 net/socket.c:1856 __sys_accept4_file net/socket.c:1899 [inline] __sys_accept4+0x104/0x170 net/socket.c:1929 __do_sys_accept net/socket.c:1947 [inline] __se_sys_accept net/socket.c:1944 [inline] __x64_sys_accept+0x79/0x90 net/socket.c:1944 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fb01ae89109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb01bf8b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 00007fb01af9c100 RCX: 00007fb01ae89109 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007fb01aee308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe2d76d4af R14: 00007fb01bf8b300 R15: 0000000000022000 Allocated by task 24363: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc+0x223/0x370 mm/slub.c:4417 kmalloc include/linux/slab.h:605 [inline] sk_prot_alloc+0xde/0x200 net/core/sock.c:1975 sk_alloc+0x36/0x340 net/core/sock.c:2028 nr_create+0x9d/0x500 net/netrom/af_netrom.c:433 __sock_create+0x3fd/0x850 net/socket.c:1515 sock_create net/socket.c:1566 [inline] __sys_socket_create net/socket.c:1603 [inline] __sys_socket+0x137/0x3a0 net/socket.c:1636 __do_sys_socket net/socket.c:1649 [inline] __se_sys_socket net/socket.c:1647 [inline] __x64_sys_socket+0x76/0x80 net/socket.c:1647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 24362: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kfree+0xc6/0x210 mm/slub.c:4555 sk_prot_free net/core/sock.c:2011 [inline] __sk_destruct+0x487/0x5d0 net/core/sock.c:2097 sock_put include/net/sock.h:1941 [inline] nr_release+0x227/0x430 net/netrom/af_netrom.c:554 __sock_release net/socket.c:650 [inline] sock_close+0xd7/0x260 net/socket.c:1365 __fput+0x3b9/0x820 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:3126 netlink_release+0x1310/0x1730 net/netlink/af_netlink.c:815 __sock_release net/socket.c:650 [inline] sock_release+0x7a/0x140 net/socket.c:678 xfrm_user_net_exit+0x66/0xa0 net/xfrm/xfrm_user.c:3618 ops_exit_list net/core/net_namespace.c:167 [inline] setup_net+0x990/0xc10 net/core/net_namespace.c:348 copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471 create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110 copy_namespaces+0x333/0x390 kernel/nsproxy.c:178 copy_process+0x1a13/0x3fa0 kernel/fork.c:2243 kernel_clone+0x22f/0x7a0 kernel/fork.c:2655 __do_sys_clone kernel/fork.c:2789 [inline] __se_sys_clone kernel/fork.c:2773 [inline] __x64_sys_clone+0x276/0x2e0 kernel/fork.c:2773 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:3126 netlink_release+0x1310/0x1730 net/netlink/af_netlink.c:815 __sock_release net/socket.c:650 [inline] sock_close+0xd7/0x260 net/socket.c:1365 __fput+0x3b9/0x820 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:177 get_signal+0x15d9/0x1780 kernel/signal.c:2634 arch_do_signal_or_restart+0x8d/0x750 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x74/0x160 kernel/entry/common.c:166 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88801db82000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 304 bytes inside of 2048-byte region [ffff88801db82000, ffff88801db82800) The buggy address belongs to the physical page: page:ffffea000076e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1db80 head:ffffea000076e000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00005d7400 dead000000000002 ffff888011c42000 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9527, tgid 9527 (kworker/1:8), ts 901415962198, free_ts 901298551605 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4198 __alloc_pages+0x259/0x560 mm/page_alloc.c:5426 alloc_slab_page+0x70/0xf0 mm/slub.c:1797 allocate_slab+0x5e/0x520 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x41e/0xcd0 mm/slub.c:3002 __slab_alloc mm/slub.c:3089 [inline] slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] kmem_cache_alloc_trace+0x25c/0x310 mm/slub.c:3253 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] keypair_create drivers/net/wireguard/noise.c:100 [inline] wg_noise_handshake_begin_session+0xb7/0xcd0 drivers/net/wireguard/noise.c:827 wg_receive_handshake_packet+0x418/0x950 drivers/net/wireguard/receive.c:183 wg_packet_handshake_receive_worker+0x243/0x4f0 drivers/net/wireguard/receive.c:220 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x7d/0x390 mm/page_alloc.c:3438 free_slab mm/slub.c:2041 [inline] discard_slab mm/slub.c:2047 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2521 put_cpu_partial+0x116/0x180 mm/slub.c:2597 do_slab_free mm/slub.c:3495 [inline] ___cache_free+0x118/0x1a0 mm/slub.c:3514 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x199/0x2f0 mm/slub.c:3239 ptlock_alloc mm/memory.c:5763 [inline] ptlock_init include/linux/mm.h:2304 [inline] pmd_ptlock_init include/linux/mm.h:2390 [inline] pgtable_pmd_page_ctor include/linux/mm.h:2426 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:129 [inline] __pmd_alloc+0x132/0x840 mm/memory.c:5214 pmd_alloc include/linux/mm.h:2254 [inline] __handle_mm_fault mm/memory.c:5003 [inline] handle_mm_fault+0xf93/0x3f20 mm/memory.c:5140 do_user_addr_fault+0x6ae/0xca0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1484 [inline] exc_page_fault+0x7a/0x120 arch/x86/mm/fault.c:1540 asm_exc_page_fault+0x27/0x30 Memory state around the buggy address: ffff88801db82000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801db82080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801db82100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801db82180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801db82200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================