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Re: net: heap out-of-bounds in fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune_clone

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  Re: net: heap out-of-bounds in  fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune_clone David Ahern <dsa@cumulusnetworks.com> - 2017-04-25 18:00 +0200

#1630718 — Re: net: heap out-of-bounds in fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune_clone

On 3/7/17 2:21 AM, Dmitry Vyukov wrote:
> ------------[ cut here ]------------
> WARNING: CPU: 2 PID: 3990 at net/ipv6/ip6_fib.c:991
> fib6_add+0x2e12/0x3290 net/ipv6/ip6_fib.c:991 net/ipv6/ip6_fib.c:991
> Kernel panic - not syncing: panic_on_warn set ...
> 
> CPU: 2 PID: 3990 Comm: kworker/2:4 Not tainted 4.11.0-rc1+ #311
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
> Workqueue: ipv6_addrconf addrconf_dad_work
> Call Trace:
>  __dump_stack lib/dump_stack.c:16 [inline]
>  __dump_stack lib/dump_stack.c:16 [inline] lib/dump_stack.c:52
>  dump_stack+0x2fb/0x3fd lib/dump_stack.c:52 lib/dump_stack.c:52
>  panic+0x20f/0x426 kernel/panic.c:180 kernel/panic.c:180
>  __warn+0x1c4/0x1e0 kernel/panic.c:541 kernel/panic.c:541
>  warn_slowpath_null+0x2c/0x40 kernel/panic.c:584 kernel/panic.c:584
>  fib6_add+0x2e12/0x3290 net/ipv6/ip6_fib.c:991 net/ipv6/ip6_fib.c:991
>  __ip6_ins_rt+0x60/0x80 net/ipv6/route.c:948 net/ipv6/route.c:948
>  ip6_ins_rt+0x19b/0x220 net/ipv6/route.c:959 net/ipv6/route.c:959
>  __ipv6_ifa_notify+0x62e/0x7a0 net/ipv6/addrconf.c:5485 net/ipv6/addrconf.c:5485
>  ipv6_ifa_notify+0xdf/0x1d0 net/ipv6/addrconf.c:5518 net/ipv6/addrconf.c:5518
>  addrconf_dad_completed+0xe6/0x950 net/ipv6/addrconf.c:3983
> net/ipv6/addrconf.c:3983
>  addrconf_dad_begin net/ipv6/addrconf.c:3797 [inline]

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