================================================================== BUG: KASAN: slab-use-after-free in page_pool_recycle_in_ring net/core/page_pool.c:523 [inline] BUG: KASAN: slab-use-after-free in page_pool_put_defragged_page+0x85e/0x880 net/core/page_pool.c:607 Read of size 8 at addr ffff88807afc8700 by task syz-executor.0/20654 CPU: 1 PID: 20654 Comm: syz-executor.0 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:571 page_pool_recycle_in_ring net/core/page_pool.c:523 [inline] page_pool_put_defragged_page+0x85e/0x880 net/core/page_pool.c:607 page_pool_put_page include/net/page_pool.h:342 [inline] page_pool_put_full_page include/net/page_pool.h:350 [inline] page_pool_return_skb_page+0x1c8/0x3d0 net/core/page_pool.c:928 skb_pp_recycle net/core/skbuff.c:885 [inline] skb_free_head+0x14b/0x1b0 net/core/skbuff.c:901 skb_release_data+0x598/0x820 net/core/skbuff.c:935 skb_release_all net/core/skbuff.c:1001 [inline] __kfree_skb net/core/skbuff.c:1015 [inline] kfree_skb_reason+0x11e/0x210 net/core/skbuff.c:1051 kfree_skb include/linux/skbuff.h:1236 [inline] skb_queue_purge+0x1d/0x40 net/core/skbuff.c:3663 packet_release+0x7c9/0xd10 net/packet/af_packet.c:3182 __sock_release+0xcd/0x290 net/socket.c:653 sock_close+0x1c/0x20 net/socket.c:1397 __fput+0x27c/0xa90 fs/file_table.c:321 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcf88e3e01b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007fff1f7e0770 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fcf88e3e01b RDX: 00007fcf88a00da0 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007fcf88fad980 R08: 0000000000000000 R09: 00007fcf88a00000 R10: 00007fcf88a00da8 R11: 0000000000000293 R12: 00000000001d240e R13: 00007fff1f7e0870 R14: 00007fcf88fabf80 R15: 0000000000000032 Allocated by task 20656: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kmalloc_node include/linux/slab.h:575 [inline] kzalloc_node include/linux/slab.h:691 [inline] page_pool_create+0x7c/0x6d0 net/core/page_pool.c:209 xdp_test_run_setup net/bpf/test_run.c:179 [inline] bpf_test_run_xdp_live+0x1be/0x18c0 net/bpf/test_run.c:374 bpf_prog_test_run_xdp+0xa05/0x1540 net/bpf/test_run.c:1438 bpf_prog_test_run kernel/bpf/syscall.c:3681 [inline] __sys_bpf+0x1602/0x5420 kernel/bpf/syscall.c:5076 __do_sys_bpf kernel/bpf/syscall.c:5162 [inline] __se_sys_bpf kernel/bpf/syscall.c:5160 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5160 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 20309: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 page_pool_free net/core/page_pool.c:768 [inline] page_pool_release+0xb31/0xd90 net/core/page_pool.c:806 page_pool_release_retry+0x22/0x1f0 net/core/page_pool.c:817 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Last potentially related work creation: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491 insert_work+0x48/0x360 kernel/workqueue.c:1365 __queue_work+0x5c6/0xfb0 kernel/workqueue.c:1526 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0xbb/0x330 kernel/time/timer.c:1746 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:553 The buggy address belongs to the object at ffff88807afc8000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1792 bytes inside of freed 2048-byte region [ffff88807afc8000, ffff88807afc8800) The buggy address belongs to the physical page: page:ffffea0001ebf200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807afc9000 pfn:0x7afc8 head:ffffea0001ebf200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442000 ffffea0001f7b210 ffffea0000b03a10 raw: ffff88807afc9000 0000000000080007 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 19895, tgid 19878 (syz-executor.2), ts 1837095536949, free_ts 1809321449600 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf67/0x2a80 mm/page_alloc.c:3539 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4805 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x28e/0x380 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986 kmalloc_reserve+0xf0/0x270 net/core/skbuff.c:574 __alloc_skb+0x129/0x330 net/core/skbuff.c:643 alloc_skb include/linux/skbuff.h:1288 [inline] nlmsg_new include/net/netlink.h:1003 [inline] rtmsg_ifinfo_build_skb+0x7e/0x280 net/core/rtnetlink.c:3986 rtmsg_ifinfo_event net/core/rtnetlink.c:4029 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4019 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4038 register_netdevice+0x1235/0x1640 net/core/dev.c:10132 __ip_tunnel_create+0x398/0x5b0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x1f9/0x5d0 net/ipv4/ip_tunnel.c:1091 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x4dd/0xb90 mm/page_alloc.c:2600 free_unref_page+0x33/0x370 mm/page_alloc.c:2695 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:711 [inline] slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x17c/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x230/0x430 security/tomoyo/file.c:822 tomoyo_sb_umount+0x8d/0xd0 security/tomoyo/tomoyo.c:428 security_sb_umount+0x4c/0xa0 security/security.c:1374 do_umount fs/namespace.c:1635 [inline] path_umount+0x2f8/0x10b0 fs/namespace.c:1804 ksys_umount fs/namespace.c:1827 [inline] __do_sys_umount fs/namespace.c:1832 [inline] __se_sys_umount fs/namespace.c:1830 [inline] __x64_sys_umount+0x15d/0x190 fs/namespace.c:1830 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807afc8600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807afc8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807afc8700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807afc8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807afc8800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================