================================================================== BUG: KASAN: slab-out-of-bounds in ether_addr_equal include/linux/etherdevice.h:349 [inline] BUG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:599 [inline] BUG: KASAN: slab-out-of-bounds in ipvlan_queue_xmit+0x1731/0x19d0 drivers/net/ipvlan/ipvlan_core.c:645 Read of size 4 at addr ffff88807caf2bff by task syz-executor.1/14864 CPU: 1 PID: 14864 Comm: syz-executor.1 Not tainted 5.15.0-rc7-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+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256 __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:599 [inline] ipvlan_queue_xmit+0x1731/0x19d0 drivers/net/ipvlan/ipvlan_core.c:645 ipvlan_start_xmit+0x45/0x190 drivers/net/ipvlan/ipvlan_main.c:222 __netdev_start_xmit include/linux/netdevice.h:4987 [inline] netdev_start_xmit include/linux/netdevice.h:5001 [inline] __dev_direct_xmit+0x527/0x730 net/core/dev.c:4294 dev_direct_xmit include/linux/netdevice.h:2978 [inline] packet_direct_xmit+0x1b8/0x2c0 net/packet/af_packet.c:281 packet_snd net/packet/af_packet.c:3052 [inline] packet_sendmsg+0x220b/0x52a0 net/packet/af_packet.c:3079 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044 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: 0033:0x7f9fe84cfae9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9fe5a45188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f9fe85e2f60 RCX: 00007f9fe84cfae9 RDX: 000000000000000e RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f9fe8529f25 R08: 0000000020000100 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd240891f R14: 00007f9fe5a45300 R15: 0000000000022000 Allocated by task 12871: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:614 [inline] __vmalloc_area_node mm/vmalloc.c:2903 [inline] __vmalloc_node_range+0x5ec/0x9e0 mm/vmalloc.c:3020 __vmalloc_node mm/vmalloc.c:3069 [inline] vmalloc+0x67/0x80 mm/vmalloc.c:3102 netlink_alloc_large_skb net/netlink/af_netlink.c:1196 [inline] netlink_sendmsg+0x5f0/0xda0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 sock_no_sendpage+0xf3/0x130 net/core/sock.c:3080 kernel_sendpage.part.0+0x1a0/0x340 net/socket.c:3504 kernel_sendpage net/socket.c:3501 [inline] sock_sendpage+0xe5/0x140 net/socket.c:1003 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0xd4/0x140 fs/splice.c:746 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1240 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1300 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 ffff88807caf2be0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 15 bytes to the right of 16-byte region [ffff88807caf2be0, ffff88807caf2bf0) The buggy address belongs to the page: page:ffffea0001f2bc80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88807caf2c60 pfn:0x7caf2 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000dec108 ffffea0001cda808 ffff888010c413c0 raw: ffff88807caf2c60 0000000000800012 00000001ffffffff 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 6543, ts 344081869466, free_ts 344078092322 prep_new_page mm/page_alloc.c:2424 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4153 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5375 __alloc_pages_node include/linux/gfp.h:570 [inline] alloc_slab_page mm/slub.c:1772 [inline] allocate_slab mm/slub.c:1907 [inline] new_slab+0xab/0x490 mm/slub.c:1970 ___slab_alloc+0x950/0x1050 mm/slub.c:3001 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3088 slab_alloc_node mm/slub.c:3179 [inline] __kmalloc_node+0x2d2/0x370 mm/slub.c:4444 kmalloc_node include/linux/slab.h:614 [inline] kvmalloc_node+0x61/0x120 mm/util.c:587 xt_jumpstack_alloc net/netfilter/x_tables.c:1354 [inline] xt_replace_table+0x1a2/0x820 net/netfilter/x_tables.c:1393 __do_replace+0x1d7/0x870 net/ipv4/netfilter/ip_tables.c:1067 do_replace net/ipv4/netfilter/ip_tables.c:1140 [inline] do_ipt_set_ctl+0x901/0xb80 net/ipv4/netfilter/ip_tables.c:1630 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0x3c3/0x3a90 net/ipv4/ip_sockglue.c:1444 tcp_setsockopt+0x136/0x2530 net/ipv4/tcp.c:3636 __sys_setsockopt+0x2db/0x610 net/socket.c:2176 __do_sys_setsockopt net/socket.c:2187 [inline] __se_sys_setsockopt net/socket.c:2184 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3315 [inline] free_unref_page_list+0x1a9/0xfa0 mm/page_alloc.c:3431 release_pages+0x830/0x20b0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu mm/mmu_gather.c:249 [inline] tlb_finish_mmu+0x165/0x8c0 mm/mmu_gather.c:340 exit_mmap+0x1ea/0x630 mm/mmap.c:3173 __mmput+0x122/0x4b0 kernel/fork.c:1115 mmput+0x58/0x60 kernel/fork.c:1136 free_bprm+0x65/0x2e0 fs/exec.c:1483 kernel_execve+0x380/0x460 fs/exec.c:1980 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff88807caf2a80: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc ffff88807caf2b00: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc >ffff88807caf2b80: fb fb fc fc fb fb fc fc 00 00 fc fc fb fb fc fc ^ ffff88807caf2c00: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc ffff88807caf2c80: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc ==================================================================