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
> 0030
> [ 64.419909] IP: [] tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] PGD 3e1a8067 PUD 3e298067 PMD 0
> [ 64.420019] Oops: [#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: 88003d550a40 ti: 88003d9b4000 task.ti:
> 88003d9b4000
> [ 64.420019] RIP: 0010:[] []
> tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] RSP: 0018:88003d9b7af8 EFLAGS: 00010292
> [ 64.420019] RAX: RBX: 0008 RCX:
>
> [ 64.420019] RDX: 88003e169ec0 RSI: 88003d9b7b38 RDI:
> 880037d92500
> [ 64.420019] RBP: 88003d9b7b28 R08: 0ec0 R09:
> 1100
> [ 64.420019] R10: 880037f8bc10 R11: 0008 R12:
> 88003d9b7bd8
> [ 64.420019] R13: 88003d9b7bb0 R14: 88003d87d240 R15:
> 880037d92500
> [ 64.420019] FS: 7ffb5e045740() GS:88003fc8()
> knlGS:
> [ 64.420019] CS: 0010 DS: ES: CR0: 80050033
> [ 64.420019] CR2: 0030 CR3: 3d9c2000 CR4:
> 06a0
> [ 64.420019] Stack:
> [ 64.420019] 00ff88003d87d240 880037d92c00 88003d9b7bd8
> 880037d92c00
> [ 64.420019] 88003d9b7bd8 88003d9b7bb0 88003d9b7ba0
> a0019924
> [ 64.420019]
>
> [ 64.420019] Call Trace:
> [ 64.420019] [] tipc_nl_compat_doit+0x134/0x1a0 [tipc]
> [ 64.420019] [] tipc_nl_compat_recv+0x26b/0x4e0 [tipc]
> [ 64.420019] [] ? tipc_nl_net_dump+0x190/0x190 [tipc]
> [ 64.420019] [] ? tipc_nl_compat_recv+0x4e0/0x4e0
> [tipc]
> [ 64.420019] [] genl_family_rcv_msg+0x1b7/0x370
> [ 64.420019] [] ? genl_family_rcv_msg+0x370/0x370
> [ 64.420019] [] genl_rcv_msg+0x7b/0xc0
> [ 64.420019] [] netlink_rcv_skb+0x99/0xb0
> [ 64.420019] [] genl_rcv+0x23/0x40
> [ 64.420019] [] netlink_unicast+0x14e/0x220
> [ 64.420019] [] netlink_sendmsg+0x319/0x350
> [ 64.420019] [] sock_write_iter+0x79/0xe0
> [ 64.420019] [] __vfs_write+0xa5/0xe0
> [ 64.420019] [] vfs_write+0x99/0x180
> [ 64.420019] [] SyS_write+0x41/0xa0
> [ 64.420019] [] 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 [] tipc_nl_net_set+0x17/0xe0 [tipc]
> [ 64.420019] RSP
> [ 64.420019] CR2: 0030
> [ 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 _net;
> 262 #endif
> 263 }
> (gdb)
>
>
>
>
>
> --
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