linux-image-2.6.35-15-generic panicing for first usage of ppp connection

[Joel Soete]

Binary package hint: linux-image-2.6.35-15-generic

Hello all,

I installed ubuntu 10.04 since few month and just play to upgrade to next release.
Nowadays that linux 2.6.35 is recently released, I try to install latest ubuntu package namely linux-image-2.6.35-15-generic.
All seems to work fine until I open gnome desktop and start firefox: the system panics.
I so manage to come back to my custom kernel to change /etc/default/grub to boot from serial console to grab more info in the attached file ubt1.txt (collected from dows hyperterminal).
Without launching firefox, I also try to send ubuntu-bug report but it fails: that's like this that I figure out that system panicing when it uses ppp connection.

I also try to download those kernel src tree and rebuild a custom kernel from my operational custom 2.6.34 .config but it doesn't help at all

[Joel Soete (rubisher)]

As patch-2.6.35.2-3 was released, I apply it on my custom config but this time ppp simply failed to start:
Aug 21 17:41:04 sidh64 kernel: [ 20.176401] eth1: Link changed: 10Mbps, half duplex
Aug 21 17:41:04 sidh64 kernel: [ 20.389054] general protection fault: 0000 [#1] SMP
Aug 21 17:41:04 sidh64 kernel: [ 20.389213] last sysfs file: /sys/devices/virtual/net/lo/operstate
Aug 21 17:41:04 sidh64 kernel: [ 20.389285] CPU 4
Aug 21 17:41:04 sidh64 kernel: [ 20.389333] Modules linked in: nvidia(P) tpm_tis parport_pc tpm agpgart parport tpm_bios i7core_edac edac_core i2o_config i2o_block ide_pci_generic ide_core
Aug 21 17:41:04 sidh64 kernel: [ 20.390105]
Aug 21 17:41:04 sidh64 kernel: [ 20.390169] Pid: 1770, comm: pppd Tainted: P 2.6.35.3-amd64-t0 #2 EX58-UD3R/EX58-UD3R
Aug 21 17:41:04 sidh64 kernel: [ 20.390261] RIP: 0010:[<ffffffff810e4d9b>] [<ffffffff810e4d9b>] put_page+0x1b/0x180
Aug 21 17:41:04 sidh64 kernel: [ 20.390400] RSP: 0018:ffff880137b93bf8 EFLAGS: 00010292
Aug 21 17:41:04 sidh64 kernel: [ 20.390470] RAX: 0000000000000030 RBX: aed7aed77ea97ea9 RCX: 000000000000b941
Aug 21 17:41:04 sidh64 kernel: [ 20.390543] RDX: ffff880138d45640 RSI: ffff880137b3f700 RDI: aed7aed77ea97ea9
Aug 21 17:41:04 sidh64 kernel: [ 20.390617] RBP: ffff880137b3f700 R08: 0000000000000000 R09: 0000000000000000
Aug 21 17:41:04 sidh64 kernel: [ 20.390690] R10: 0000000000000000 R11: 0000000000000246 R12: ffff880137b93e58
Aug 21 17:41:04 sidh64 kernel: [ 20.390764] R13: ffff88013b285000 R14: 000000000000003c R15: 00000000000005f0
Aug 21 17:41:04 sidh64 kernel: [ 20.390838] FS: 00007f9f24fb5700(0000) GS:ffff880001f00000(0000) knlGS:0000000000000000
Aug 21 17:41:04 sidh64 kernel: [ 20.390928] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Aug 21 17:41:04 sidh64 kernel: [ 20.390999] CR2: 00007f657f021cfc CR3: 000000013ca8d000 CR4: 00000000000006e0
Aug 21 17:41:04 sidh64 kernel: [ 20.391072] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Aug 21 17:41:04 sidh64 kernel: [ 20.391146] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Aug 21 17:41:04 sidh64 kernel: [ 20.391220] Process pppd (pid: 1770, threadinfo ffff880137b92000, task ffff88013e192e60)
Aug 21 17:41:04 sidh64 kernel: [ 20.391309] Stack:
Aug 21 17:41:04 sidh64 kernel: [ 20.391372] ffff880137b3f500 0000000000000001 ffff880137b3f700 ffff880137b93e58
Aug 21 17:41:04 sidh64 kernel: [ 20.391576] <0> ffff88013b285000 ffffffff81465be7 ffff88013b285000 ffff880137b3f700
Aug 21 17:41:04 sidh64 kernel: [ 20.391883] <0> 0000000000000000 ffffffff814656f1 ffff88013b285000 ffffffff81469a8c
Aug 21 17:41:04 sidh64 kernel: [ 20.392250] Call Trace:
Aug 21 17:41:04 sidh64 kernel: [ 20.392318] [<ffffffff81465be7>] ? skb_release_data+0x77/0xd0
Aug 21 17:41:04 sidh64 kernel: [ 20.392390] [<ffffffff814656f1>] ? __kfree_skb+0x11/0x90
Aug 21 17:41:04 sidh64 kernel: [ 20.392462] [<ffffffff81469a8c>] ? skb_free_datagram+0xc/0x40
Aug 21 17:41:04 sidh64 kernel: [ 20.392535] [<ffffffff815304c9>] ? packet_recvmsg+0x1b9/0x4d0
Aug 21 17:41:04 sidh64 kernel: [ 20.392606] [<ffffffff8145d8bd>] ? sock_recvmsg+0xed/0x140
Aug 21 17:41:...

[Joel Soete (rubisher)]

Issue fixed by Jarek Poplawski patch <https://lkml.org/lkml/2010/12/25/17>.

Cheers,
    J.

[Joel Soete (rubisher)]

Fix submitted upstream here: <https://lkml.org/lkml/2010/12/25/28>

Successfully tested also on 2.6.36.2 vanilla src tree.