Title | Replies (including bot) | Last reply |
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KASAN: slab-out-of-bounds Read in bpf_skb_vlan_push | 4 (8) | 2018/06/14 07:37 |
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KASAN: slab-out-of-bounds Read in bpf_skb_vlan_push | 4 (8) | 2018/06/14 07:37 |
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: slab-out-of-bounds in skb_at_tc_ingress include/net/sch_generic.h:535 [inline] BUG: KASAN: slab-out-of-bounds in bpf_push_mac_rcsum net/core/filter.c:1625 [inline] BUG: KASAN: slab-out-of-bounds in ____bpf_skb_vlan_push net/core/filter.c:2446 [inline] BUG: KASAN: slab-out-of-bounds in bpf_skb_vlan_push+0x6b7/0x720 net/core/filter.c:2437 Read of size 5 at addr ffff8801b77347d0 by task syz-executor6/6529 CPU: 1 PID: 6529 Comm: syz-executor6 Not tainted 4.17.0-rc7+ #38 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:443 skb_at_tc_ingress include/net/sch_generic.h:535 [inline] bpf_push_mac_rcsum net/core/filter.c:1625 [inline] ____bpf_skb_vlan_push net/core/filter.c:2446 [inline] bpf_skb_vlan_push+0x6b7/0x720 net/core/filter.c:2437 Allocated by task 6523: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc_node+0x144/0x780 mm/slab.c:3644 __alloc_skb+0x111/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:987 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1182 [inline] netlink_sendmsg+0xb01/0xfa0 net/netlink/af_netlink.c:1876 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 5303: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x2d0 mm/slab.c:3756 kfree_skbmem+0x13c/0x210 net/core/skbuff.c:582 __kfree_skb net/core/skbuff.c:642 [inline] consume_skb+0x193/0x550 net/core/skbuff.c:701 netlink_dump+0xafa/0xd20 net/netlink/af_netlink.c:2262 netlink_recvmsg+0xe97/0x1450 net/netlink/af_netlink.c:1984 sock_recvmsg_nosec net/socket.c:802 [inline] sock_recvmsg+0xd0/0x110 net/socket.c:809 ___sys_recvmsg+0x2b6/0x680 net/socket.c:2279 __sys_recvmsg+0x112/0x260 net/socket.c:2328 __do_sys_recvmsg net/socket.c:2338 [inline] __se_sys_recvmsg net/socket.c:2335 [inline] __x64_sys_recvmsg+0x78/0xb0 net/socket.c:2335 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801b77346c0 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 40 bytes to the right of 232-byte region [ffff8801b77346c0, ffff8801b77347a8) The buggy address belongs to the page: page:ffffea0006ddcd00 count:1 mapcount:0 mapping:ffff8801b7734080 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffff8801b7734080 0000000000000000 000000010000000c raw: ffffea00073a2da0 ffffea0006ddc060 ffff8801d942b840 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b7734680: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8801b7734700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801b7734780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8801b7734800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801b7734880: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/06/13 15:42 | bpf-next | 75d4e704fa8d | 27c5f59f | .config | console log | report | syz | ci-upstream-bpf-next-kasan-gce | ||||
2018/06/13 14:00 | bpf-next | 75d4e704fa8d | 27c5f59f | .config | console log | report | ci-upstream-bpf-next-kasan-gce |