> -----Original Message----- > From: Richard Weinberger [mailto:richard.weinberger@xxxxxxxxx] > Sent: Monday, August 25, 2014 3:48 AM > To: Sitsofe Wheeler > Cc: Haiyang Zhang; KY Srinivasan; Greg Kroah-Hartman; > devel@xxxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Jason Wang; > Daniel Borkmann; David S. Miller; netdev@xxxxxxxxxxxxxxx > Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU > > via > > > On Wed, Aug 20, 2014 at 5:41 AM, Sitsofe Wheeler <sitsofe@xxxxxxxxx> > wrote: > > Aug 20 04:04:41 ubuntuhv kernel: [ 9.230399] random: nonblocking pool is > initialized > > Aug 20 04:04:41 ubuntuhv kernel: [ 10.338487] EXT4-fs (sda1): re- > mounted. Opts: errors=remount-ro > > Aug 20 04:04:41 ubuntuhv kernel: [ 11.099094] hv_storvsc vmbus_0_1: > cmd 0x85 scsi status 0x2 srb status 0x6 > > Aug 20 04:04:41 ubuntuhv kernel: [ 11.099901] hv_storvsc vmbus_0_1: > cmd 0x85 scsi status 0x2 srb status 0x6 > > Aug 20 04:04:43 ubuntuhv kernel: [ 12.999830] psmouse serio1: trackpoint: > IBM TrackPoint firmware: 0x01, buttons: 0/0 > > Aug 20 03:55:47 ubuntuhv kernel: [ 13.003659] input: TPPS/2 IBM > TrackPoint as /devices/platform/i8042/serio1/input/input4 > > Aug 20 03:57:28 ubuntuhv kernel: [ 113.711832] hv_netvsc vmbus_0_14: > > net device safe to remove Aug 20 03:57:28 ubuntuhv kernel: [ > > 113.713882] hv_netvsc: hv_netvsc channel opened successfully Aug 20 > > 03:57:29 ubuntuhv kernel: [ 114.961312] hv_netvsc vmbus_0_14: Send > > section size: 6144, Section count:2560 Aug 20 03:57:29 ubuntuhv > > kernel: [ 114.962711] hv_netvsc vmbus_0_14: Device MAC > > 00:15:5d:6f:02:af link state up Aug 20 03:57:34 ubuntuhv kernel: [ > > 120.027718] hv_netvsc vmbus_0_14: net device safe to remove Aug 20 > > 03:57:34 ubuntuhv kernel: [ 120.030047] hv_netvsc: hv_netvsc channel > > opened successfully Aug 20 03:57:34 ubuntuhv kernel: [ 120.035422] > hv_netvsc vmbus_0_14 eth0: unable to establish receive buffer's gpadl Aug > 20 03:57:34 ubuntuhv kernel: [ 120.039778] hv_netvsc vmbus_0_14 eth0: > unable to connect to NetVSP - 4 Aug 20 03:57:34 ubuntuhv kernel: [ > 120.039818] ------------[ cut here ]------------ Aug 20 03:57:34 ubuntuhv kernel: > [ 120.039832] kernel BUG at drivers/hv/channel.c:504! > > This is one is also a rude BUG_ON: > ret = vmbus_post_msg(msg, sizeof(struct > vmbus_channel_close_channel)); > > BUG_ON(ret != 0); > > vmbus_post_msg() hv_post_message() can easily return !0. > i.e. if this kmalloc() fails: > addr = (unsigned long)kmalloc(sizeof(struct aligned_input), > GFP_ATOMIC); > if (!addr) > return -ENOMEM; I will submit a patch to handle this case. I suspect though that the original ASSERT at channel.c (line 504) is not related to kmalloc failing in vmbus_post_msg(). I will also look at that issue as well. Regards, K. Y > > -- > Thanks, > //richard _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
