================================================================== BUG: KASAN: use-after-free in ether_addr_equal include/linux/etherdevice.h:349 [inline] BUG: KASAN: use-after-free in ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:598 [inline] BUG: KASAN: use-after-free in ipvlan_queue_xmit+0x171b/0x19e0 drivers/net/ipvlan/ipvlan_core.c:644 Read of size 4 at addr ffff88807cd473ff by task syz-executor.2/18726 CPU: 1 PID: 18726 Comm: syz-executor.2 Not tainted 5.17.0-rc5-syzkaller-00317-g52a025546731 #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+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 ether_addr_equal include/linux/etherdevice.h:349 [inline] ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:598 [inline] ipvlan_queue_xmit+0x171b/0x19e0 drivers/net/ipvlan/ipvlan_core.c:644 ipvlan_start_xmit+0x45/0x190 drivers/net/ipvlan/ipvlan_main.c:221 __netdev_start_xmit include/linux/netdevice.h:4683 [inline] netdev_start_xmit include/linux/netdevice.h:4697 [inline] __dev_direct_xmit+0x52f/0x740 net/core/dev.c:4184 dev_direct_xmit include/linux/netdevice.h:2891 [inline] packet_direct_xmit+0x1b8/0x2c0 net/packet/af_packet.c:282 packet_snd net/packet/af_packet.c:3057 [inline] packet_sendmsg+0x2226/0x5270 net/packet/af_packet.c:3084 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 __sys_sendto+0x21c/0x320 net/socket.c:2040 __do_sys_sendto net/socket.c:2052 [inline] __se_sys_sendto net/socket.c:2048 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f8de24aa049 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:00007f8de0e1f168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8de25bcf60 RCX: 00007f8de24aa049 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000004e RBP: 00007f8de250408d R08: 0000000020000040 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda4be49cf R14: 00007f8de0e1f300 R15: 0000000000022000 Allocated by task 18323: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524 kasan_kmalloc include/linux/kasan.h:270 [inline] kmem_cache_alloc_trace+0x1ea/0x4a0 mm/slab.c:3567 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] copy_verifier_state+0x827/0xb80 kernel/bpf/verifier.c:1032 is_state_visited kernel/bpf/verifier.c:11231 [inline] do_check kernel/bpf/verifier.c:11346 [inline] do_check_common+0x1c48/0xcfb0 kernel/bpf/verifier.c:13697 do_check_main kernel/bpf/verifier.c:13760 [inline] bpf_check+0x9ad9/0xd540 kernel/bpf/verifier.c:14329 bpf_prog_load+0xf55/0x21e0 kernel/bpf/syscall.c:2347 __sys_bpf+0x68a/0x5970 kernel/bpf/syscall.c:4637 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4739 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 18323: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:236 [inline] __cache_free mm/slab.c:3437 [inline] kfree+0xf8/0x2b0 mm/slab.c:3794 free_func_state kernel/bpf/verifier.c:965 [inline] free_func_state kernel/bpf/verifier.c:959 [inline] free_verifier_state+0xc4/0x250 kernel/bpf/verifier.c:981 free_states kernel/bpf/verifier.c:13612 [inline] do_check_common+0x129d/0xcfb0 kernel/bpf/verifier.c:13709 do_check_main kernel/bpf/verifier.c:13760 [inline] bpf_check+0x9ad9/0xd540 kernel/bpf/verifier.c:14329 bpf_prog_load+0xf55/0x21e0 kernel/bpf/syscall.c:2347 __sys_bpf+0x68a/0x5970 kernel/bpf/syscall.c:4637 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4739 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88807cd47000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1023 bytes inside of 2048-byte region [ffff88807cd47000, ffff88807cd47800) The buggy address belongs to the page: page:ffffea0001f351c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7cd47 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001156348 ffffea0001f26c88 ffff888010c40800 raw: 0000000000000000 ffff88807cd47000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 17133, ts 509604393279, free_ts 509505799937 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389 __alloc_pages_node include/linux/gfp.h:572 [inline] kmem_getpages mm/slab.c:1378 [inline] cache_grow_begin+0x75/0x390 mm/slab.c:2584 cache_alloc_refill+0x27f/0x380 mm/slab.c:2957 ____cache_alloc mm/slab.c:3040 [inline] ____cache_alloc mm/slab.c:3023 [inline] slab_alloc_node mm/slab.c:3241 [inline] kmem_cache_alloc_node_trace+0x49c/0x5b0 mm/slab.c:3609 __do_kmalloc_node mm/slab.c:3631 [inline] __kmalloc_node+0x38/0x60 mm/slab.c:3639 kmalloc_node include/linux/slab.h:604 [inline] kvmalloc_node+0x3e/0x100 mm/util.c:580 kvmalloc include/linux/slab.h:731 [inline] kvmalloc_array include/linux/slab.h:749 [inline] __alloc_bucket_spinlocks+0x64/0x170 lib/bucket_locks.c:34 alloc_ila_locks net/ipv6/ila/ila_xlat.c:30 [inline] ila_xlat_init_net+0x163/0x340 net/ipv6/ila/ila_xlat.c:609 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x554/0xbb0 net/core/net_namespace.c:330 copy_net_ns+0x318/0x760 net/core/net_namespace.c:474 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178 copy_process+0x31e4/0x7250 kernel/fork.c:2167 kernel_clone+0xe7/0xab0 kernel/fork.c:2565 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page_list+0x1a9/0xfa0 mm/page_alloc.c:3441 release_pages+0x317/0x1220 mm/swap.c:980 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline] tlb_flush_mmu_free mm/mmu_gather.c:243 [inline] tlb_flush_mmu mm/mmu_gather.c:250 [inline] tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:341 exit_mmap+0x21b/0x6a0 mm/mmap.c:3180 __mmput+0x122/0x4b0 kernel/fork.c:1114 mmput+0x56/0x60 kernel/fork.c:1135 copy_process+0x32d7/0x7250 kernel/fork.c:2423 kernel_clone+0xe7/0xab0 kernel/fork.c:2565 __do_sys_clone3+0x1dd/0x2f0 kernel/fork.c:2840 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff88807cd47280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807cd47300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807cd47380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807cd47400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807cd47480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================