Anybody who has time to look into this?
///jon
On 02/19/2016 06:41 PM, Jon Maloy wrote:
> The compatibility functionality has been broken, and causes a crash as
> shown below:
>
> Bisecting seems to indicate that the culprit is:
>
> commit 263ea09084d172cac6e40459a690babe8de8e448
> ("Revert "genl: Add genlmsg_new_unicast() for unicast message allocation")
>
> ///jon
>
> ------------------------------------
>
> Ubuntu 14.04.1 LTS tipc2 ttyS0
>
> tipc2 login: [ 64.412751] tipc: Activated (version 2.0.0)
> [ 64.413921] NET: Registered protocol family 30
> [ 64.415318] tipc: Started in single node mode
> [ 64.418909] BUG: unable to handle kernel NULL pointer dereference at
> 0000000000000030
> [ 64.419909] IP: [<ffffffffa0018717>] tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] PGD 3e1a8067 PUD 3e298067 PMD 0
> [ 64.420019] Oops: 0000 [#1] SMP
> [ 64.420019] Modules linked in: tipc ip6_udp_tunnel udp_tunnel
> [ 64.420019] CPU: 1 PID: 1833 Comm: tipc-config Not tainted 4.5.0-rc2+ #21
> [ 64.420019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
> BIOS Bochs 01/01/2011
> [ 64.420019] task: ffff88003d550a40 ti: ffff88003d9b4000 task.ti:
> ffff88003d9b4000
> [ 64.420019] RIP: 0010:[<ffffffffa0018717>] [<ffffffffa0018717>]
> tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] RSP: 0018:ffff88003d9b7af8 EFLAGS: 00010292
> [ 64.420019] RAX: 0000000000000000 RBX: 0000000000000008 RCX:
> 0000000000000000
> [ 64.420019] RDX: ffff88003e169ec0 RSI: ffff88003d9b7b38 RDI:
> ffff880037d92500
> [ 64.420019] RBP: ffff88003d9b7b28 R08: 0000000000000ec0 R09:
> 0000000000001100
> [ 64.420019] R10: ffff880037f8bc10 R11: 0000000000000008 R12:
> ffff88003d9b7bd8
> [ 64.420019] R13: ffff88003d9b7bb0 R14: ffff88003d87d240 R15:
> ffff880037d92500
> [ 64.420019] FS: 00007ffb5e045740(0000) GS:ffff88003fc80000(0000)
> knlGS:0000000000000000
> [ 64.420019] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 64.420019] CR2: 0000000000000030 CR3: 000000003d9c2000 CR4:
> 00000000000006a0
> [ 64.420019] Stack:
> [ 64.420019] 00ff88003d87d240 ffff880037d92c00 ffff88003d9b7bd8
> ffff880037d92c00
> [ 64.420019] ffff88003d9b7bd8 ffff88003d9b7bb0 ffff88003d9b7ba0
> ffffffffa0019924
> [ 64.420019] 0000000000000000 0000000000000000 0000000000000000
> 0000000000000000
> [ 64.420019] Call Trace:
> [ 64.420019] [<ffffffffa0019924>] tipc_nl_compat_doit+0x134/0x1a0 [tipc]
> [ 64.420019] [<ffffffffa0019bfb>] tipc_nl_compat_recv+0x26b/0x4e0 [tipc]
> [ 64.420019] [<ffffffffa0018700>] ? tipc_nl_net_dump+0x190/0x190 [tipc]
> [ 64.420019] [<ffffffffa0019e70>] ? tipc_nl_compat_recv+0x4e0/0x4e0
> [tipc]
> [ 64.420019] [<ffffffff81367697>] genl_family_rcv_msg+0x1b7/0x370
> [ 64.420019] [<ffffffff81367850>] ? genl_family_rcv_msg+0x370/0x370
> [ 64.420019] [<ffffffff813678cb>] genl_rcv_msg+0x7b/0xc0
> [ 64.420019] [<ffffffff81366ca9>] netlink_rcv_skb+0x99/0xb0
> [ 64.420019] [<ffffffff813672b3>] genl_rcv+0x23/0x40
> [ 64.420019] [<ffffffff813666ce>] netlink_unicast+0x14e/0x220
> [ 64.420019] [<ffffffff81366ab9>] netlink_sendmsg+0x319/0x350
> [ 64.420019] [<ffffffff8132c9b9>] sock_write_iter+0x79/0xe0
> [ 64.420019] [<ffffffff8113abe5>] __vfs_write+0xa5/0xe0
> [ 64.420019] [<ffffffff8113b7a9>] vfs_write+0x99/0x180
> [ 64.420019] [<ffffffff8113c231>] SyS_write+0x41/0xa0
> [ 64.420019] [<ffffffff8142d96e>] entry_SYSCALL_64_fastpath+0x12/0x71
> [ 64.420019] Code: 8b 83 c8 00 00 00 eb 85 66 66 66 2e 0f 1f 84 00 00
> 00 00 00 55 48 89 e5 41 55 41 54 53 48 83 ec 18 48 8b 47 18 8b 1d 8d de
> 00 00 <4c> 8b 68 30 8d 53 ff 48 63 d2 49 8b 85 80 06 00 00 4c 8b 64 d0
> [ 64.420019] RIP [<ffffffffa0018717>] tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] RSP <ffff88003d9b7af8>
> [ 64.420019] CR2: 0000000000000030
> [ 64.464333] ---[ end trace bb2702e8370958ec ]---
> [ 125.288791] random: nonblocking pool is initialized
>
>
> --------------------------------------------------------------------
>
>
> (gdb) list *(tipc_nl_net_set+0x17)
> 0xa747 is in tipc_nl_net_set (include/net/net_namespace.h:259).
> 254 }
> 255
> 256 static inline struct net *read_pnet(const possible_net_t *pnet)
> 257 {
> 258 #ifdef CONFIG_NET_NS
> 259 return pnet->net;
> 260 #else
> 261 return &init_net;
> 262 #endif
> 263 }
> (gdb)
>
>
>
>
>
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