================================================================== BUG: KASAN: use-after-free in dev_map_enqueue+0x3c/0x340 kernel/bpf/devmap.c:532 Read of size 8 at addr ffff888019269700 by task syz.1.1925/11591 CPU: 0 PID: 11591 Comm: syz.1.1925 Not tainted 6.1.117-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 dev_map_enqueue+0x3c/0x340 kernel/bpf/devmap.c:532 __xdp_do_redirect_frame net/core/filter.c:4296 [inline] xdp_do_redirect_frame+0x323/0x660 net/core/filter.c:4358 xdp_test_run_batch net/bpf/test_run.c:314 [inline] bpf_test_run_xdp_live+0xbf4/0x1ea0 net/bpf/test_run.c:362 bpf_prog_test_run_xdp+0x7d1/0x1130 net/bpf/test_run.c:1393 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3685 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:5038 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline] __se_sys_bpf kernel/bpf/syscall.c:5122 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f290077e719 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2901617038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2900936058 RCX: 00007f290077e719 RDX: 0000000000000050 RSI: 00000000200000c0 RDI: 000000000000000a RBP: 00007f29007f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2900936058 R15: 00007fff684707f8 Allocated by task 11405: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:693 [inline] get_undo_list ipc/sem.c:1856 [inline] copy_semundo+0xb1/0x230 ipc/sem.c:2314 copy_process+0x1848/0x4060 kernel/fork.c:2251 kernel_clone+0x222/0x920 kernel/fork.c:2681 __do_sys_clone3 kernel/fork.c:2980 [inline] __se_sys_clone3+0x373/0x410 kernel/fork.c:2964 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 11405: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674 exit_sem+0x197a/0x19e0 ipc/sem.c:2447 do_exit+0xa44/0x26a0 kernel/exit.c:864 do_group_exit+0x202/0x2b0 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2845 nf_unregister_net_hooks+0xcc/0x130 net/netfilter/core.c:601 nf_defrag_ipv6_disable+0x93/0xe0 net/ipv6/netfilter/nf_defrag_ipv6_hooks.c:163 nf_ct_netns_put+0x374/0x510 nf_conncount_destroy+0x42/0x150 net/netfilter/nf_conncount.c:590 ovs_ct_limit_exit net/openvswitch/conntrack.c:1919 [inline] ovs_ct_exit+0x95/0x200 net/openvswitch/conntrack.c:2322 ovs_exit_net+0xea/0x7c0 net/openvswitch/datapath.c:2649 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:604 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 The buggy address belongs to the object at ffff888019269700 which belongs to the cache kmalloc-cg-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff888019269700, ffff888019269760) The buggy address belongs to the physical page: page:ffffea0000649a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888019269c80 pfn:0x19269 memcg:ffff8880310d5801 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001692900 dead000000000007 ffff888017c428c0 raw: ffff888019269c80 000000008020001e 00000001ffffffff ffff8880310d5801 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 2181371106, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2517 prep_new_page mm/page_alloc.c:2524 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4313 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5589 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2115 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa1/0x230 mm/slab_common.c:949 kmalloc include/linux/slab.h:562 [inline] kzalloc include/linux/slab.h:693 [inline] __register_sysctl_table+0xdc/0x11e0 fs/proc/proc_sysctl.c:1341 net_sysctl_init+0x1a/0x79 net/sysctl_net.c:103 sock_init+0xc/0xe1 net/socket.c:3203 do_one_initcall+0x265/0x8f0 init/main.c:1298 do_initcall_level+0x157/0x207 init/main.c:1371 do_initcalls+0x49/0x86 init/main.c:1387 kernel_init_freeable+0x45c/0x60f init/main.c:1626 page_owner free stack trace missing Memory state around the buggy address: ffff888019269600: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff888019269680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888019269700: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888019269780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888019269800: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================