KASAN: stack-out-of-bounds Read in __neigh

Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported
KASAN: stack-out-of-bounds Read in timerqueue_add kernel	17	syz, C			4	2939d	2955d

Title

Rank 🛈

Repro

KASAN: stack-out-of-bounds Read in timerqueue_add kernel

syz, C

2939d

2955d

Title	Replies (including bot)	Last reply
KASAN: stack-out-of-bounds Read in __neigh_create	1 (2)	2018/07/05 16:17

IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: stack-out-of-bounds in __neigh_create+0x1e93/0x2080 net/core/neighbour.c:522 Read of size 8 at addr ffff8801d4832220 by task kworker/1:2/2005 CPU: 1 PID: 2005 Comm: kworker/1:2 Not tainted 4.18.0-rc3+ #45 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: ------------[ cut here ]------------ __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 do_IRQ(): syz-executor810 has overflown the kernel stack (cur:ffff8801d6450000,sp:ffff8801ce2cbd68,irq stk top-bottom:ffff8801dae00080-ffff8801dae08000,exception stk top-bottom:fffffe0000007080-fffffe0000011000,ip:lock_release+0x87/0xa30) WARNING: CPU: 0 PID: 4713 at arch/x86/kernel/irq_64.c:63 stack_overflow_check arch/x86/kernel/irq_64.c:60 [inline] WARNING: CPU: 0 PID: 4713 at arch/x86/kernel/irq_64.c:63 handle_irq+0x1fb/0x2e7 arch/x86/kernel/irq_64.c:72 Kernel panic - not syncing: panic_on_warn set ... 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_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __neigh_create+0x1e93/0x2080 net/core/neighbour.c:522 ip6_finish_output2+0xa5d/0x2820 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5fe/0xbc0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:276 [inline] ip6_output+0x234/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] ndisc_send_skb+0x100d/0x1570 net/ipv6/ndisc.c:491 ndisc_send_ns+0x3c1/0x8d0 net/ipv6/ndisc.c:633 addrconf_dad_work+0xbf2/0x1310 net/ipv6/addrconf.c:4061 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 CPU: 0 PID: 4713 Comm: syz-executor810 Not tainted 4.18.0-rc3+ #45 Allocated by task 4511: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 save_stack+0x43/0xd0 mm/kasan/kasan.c:448 Call Trace: set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 <IRQ> __do_kmalloc mm/slab.c:3718 [inline] __kmalloc_track_caller+0x14a/0x760 mm/slab.c:3733 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 kmemdup+0x24/0x50 mm/util.c:118 kmemdup include/linux/string.h:418 [inline] neigh_parms_alloc+0xea/0x6b0 net/core/neighbour.c:1492 ipv6_add_dev+0x3ec/0x13b0 net/ipv6/addrconf.c:392 panic+0x238/0x4e7 kernel/panic.c:184 addrconf_notify+0x9fb/0x27f0 net/ipv6/addrconf.c:3435 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1735 call_netdevice_notifiers net/core/dev.c:1753 [inline] register_netdevice+0xb9d/0x1100 net/core/dev.c:8183 veth_newlink+0x5f5/0xa70 drivers/net/veth.c:443 rtnl_newlink+0xeff/0x1d60 net/core/rtnetlink.c:3050 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 rtnetlink_rcv_msg+0x46e/0xc30 net/core/rtnetlink.c:4662 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4680 report_bug+0x252/0x2d0 lib/bug.c:186 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a0/0x760 net/netlink/af_netlink.c:1336 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:641 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:651 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2125 __sys_sendmsg+0x11d/0x290 net/socket.c:2163 __do_sys_sendmsg net/socket.c:2172 [inline] __se_sys_sendmsg net/socket.c:2170 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2170 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 Freed by task 0: RIP: 0010:stack_overflow_check arch/x86/kernel/irq_64.c:60 [inline] RIP: 0010:handle_irq+0x1fb/0x2e7 arch/x86/kernel/irq_64.c:72 (stack is not available) Code: 00 The buggy address belongs to the object at ffff8801d4832200 which belongs to the cache kmalloc-192 of size 192 00 The buggy address is located 32 bytes inside of 192-byte region [ffff8801d4832200, ffff8801d48322c0) ff The buggy address belongs to the page: b6 80 page:ffffea0007520c80 count:1 mapcount:0 mapping:ffff8801da800040 index:0x0 00 00 00 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00074f9d48 ffffea0007526848 ffff8801da800040 48 raw: 0000000000000000 ffff8801d4832000 0000000100000010 0000000000000000 c7 c7 page dumped because: kasan: bad access detected 40 bc Memory state around the buggy address: e4 ffff8801d4832100: f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 87 ffff8801d4832180: f2 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2 f2 41 >ffff8801d4832200: f2 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 54 41 ^ 55 ffff8801d4832280: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 65 ffff8801d4832300: f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 00 f2 48 ================================================================== 8b 04 kasan: CONFIG_KASAN_INLINE enabled 25 40 ee 01 kasan: GPF could be caused by NULL-ptr deref or user memory access 00 48 05 68 06 general protection fault: 0000 [#1] SMP KASAN 00 00 CPU: 1 PID: 2005 Comm: kworker/1:2 Tainted: G B 4.18.0-rc3+ #45 48 89 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work c6 e8 85 RIP: 0010:__x86_indirect_thunk_r14+0x10/0x20 arch/x86/lib/retpoline.S:46 b3 1c Code: 90 00 0f <0f> ae e8 0b eb f9 48 83 4c 89 c4 18 2c 24 e9 3f c3 0f ff 1f ff ff 44 48 00 89 75 00 66 e0 e8 2e 0f a1 69 1f 84 8f 00 00 00 48 8b 00 00 00 e8 RSP: 0018:ffff8801dae07f58 EFLAGS: 00010082 07 00 00 00 RAX: 0000000000000000 RBX: ffff8801ce1a4000 RCX: 0000000000000000 RDX: 0000000000010000 RSI: ffffffff81631851 RDI: 0000000000000001 f3 90 RBP: ffff8801dae07fb0 R08: ffff8801a9c52400 R09: ffffed003b5c3ec2 R10: ffffed003b5c3ec2 R11: ffff8801dae1f617 R12: fffffe0000011000 0f ae R13: fffffe0000007080 R14: 0000000000000027 R15: 0000000000000000 e8 eb f9 4c 89 34 24 do_IRQ+0x78/0x190 arch/x86/kernel/irq.c:245 <c3> 0f common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:642 1f </IRQ> 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 RSP: 0018:ffff8801cd80ecb8 EFLAGS: 00010293 RAX: ffff8801cd8065c0 RBX: ffff8801d4832200 RCX: ffffffff81601b77 RDX: 0000000000000000 RSI: ffffffff85fb9eaf RDI: ffff8801d6419b40 RBP: ffff8801cd80ef90 R08: fffffbfff1205391 R09: fffffbfff1205390 R10: fffffbfff1205390 R11: ffffffff89029c83 R12: ffffffff8984e080 R13: ffff8801d6419b40 R14: 1ffff1003a906446 R15: ffffffff8984de00 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff2099bb70 CR3: 0000000008e6a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip6_finish_output2+0xa5d/0x2820 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5fe/0xbc0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:276 [inline] ip6_output+0x234/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] ndisc_send_skb+0x100d/0x1570 net/ipv6/ndisc.c:491 ndisc_send_ns+0x3c1/0x8d0 net/ipv6/ndisc.c:633 addrconf_dad_work+0xbf2/0x1310 net/ipv6/addrconf.c:4061 process_one_work+0xc73/0x1ba0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..