[Gluster-devel] quota-rename.t core in netbsd

[Sanoj Unnikrishnan]

This is a memory overrun issue.

I was not able to fully RCA this issue. In particular i had trouble trying
to run gluster on netbsd setup.

will pick this up later if it is deemed as priority.



(gdb)

#0  0xbb40b4b7 in ?? ()

#1  0xbb756685 in synctask_destroy (task=0xb6722030) at
/home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:391

#2  0xbb756701 in synctask_done (task=0xb6722030) at
/home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:409

#3  0xbb756fed in synctask_switchto (task=0xb6722030) at
/home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:668

#4  0xbb75709b in syncenv_processor (thdata=<error reading variable: Cannot
access memory at address 0xb9efcfd8>)

    at
/home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:699

(gdb) frame 1

#1  0xbb756685 in synctask_destroy (task=0xb6722030) at
/home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:391

391     /home/jenkins/root/workspace/netbsd7-regression/libglusterfs/src/syncop.c:
No such file or directory.

(gdb) p *task

$1 = {all_tasks = {next = 0xb6722030, prev = 0xb6722030}, env = 0xbb1a9030,
xl = 0xb9901030, frame = 0x0, opframe = 0xb6702100, synccbk = 0xb9aa0849
<mq_synctask_cleanup>,

 syncfn = 0xb9aa297a <mq_update_dirty_inode_task>, state = SYNCTASK_DONE,
opaque = 0xb670b0b0, stack = 0xb6724030, woken = 0, slept = 0, ret = 0, uid
= 0, gid = 0, ctx = {

    uc_flags = 524335, uc_link = 0x0, uc_sigmask = {__bits = {4294897751,
4294967295, 4294967295, 4294967295}}, uc_stack = {ss_sp = 0xbf800000,
ss_size = 270336, ss_flags = 0},

    uc_mcontext = {__gregs = {179, 171, 31, 31, -1195381232, -1234128720,
-1234010112, -1234010176, -1149368040, -1155886264, -1234034576, 0, 3, 2,
-1149934353, 23, 2097814, -1234010160,

       31}, __fpregs = {__fp_reg_set = {__fpchip_state = {__fp_state =
{16778111, 0, -1180420687, 23, -1195379520, 31, 8064, 65471, 0 <repeats 19
times>}}, __fp_xmm_state = {

           __fp_xmm =
"\177\003\000\001\000\000\000\000\261\065��\027\000\000\000�\364\277�\037\000\000\000\200\037\000\000\277\377",
'\000' <repeats 105 times>, "�\005@", '\000' <repeats 13 times>, "�\005@",
'\000' <repeats 310 times>...}, __fp_fpregs = {16778111, 0, -1180420687,
23, -1195379520, 31, 8064, 65471, 0 <repeats 25 times>, -268435456, 16389,
0, 0, -1610612736,

           16389, 0 <repeats 77 times>, 895, 0 <repeats 11 times>}},
__fp_pad = {0 <repeats 33 times>}}, _mc_tlsbase = -1154730944}, __uc_pad =
{0, 0, 0, 0}}, proc = 0xbb1a9344, mutex = {

    ptm_magic = 0, ptm_errorcheck = 0 '\000', ptm_pad1 = "\000\000",
ptm_interlock = 0 '\000', ptm_pad2 = "\000\000", ptm_owner = 0x0,
ptm_waiters = 0x0, ptm_recursed = 0,

    ptm_spare2 = 0x0}, cond = {ptc_magic = 0, ptc_lock = 0 '\000',
ptc_waiters = {ptqh_first = 0x0, ptqh_last = 0x0}, ptc_mutex = 0x0,
ptc_private = 0x0}, done = 0, waitq = {

    next = 0xb67223b4, prev = 0xb67223b4}, btbuf = "(--> 0xbb7564d1 (-->
<synctask_yield+0x5f> (--> at (--> /build/install/lib/libglusterfs.so.0
))))", '\000' <repeats 3998 times>}


(gdb) p/x *(struct mem_header*)(task->stack - sizeof(struct mem_header))

$10 = {type = 0xbb6cd33f, size = 0x1, mem_acct = 0xb992f000, magic =
0xcafebabe, padding = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}

=>Header magic is intact

(gdb) x/5x (task->stack)

0xb6724030:     0x00000000      0x00000000      0x00000000      0x00000000

0xb6724040:     0x00000000

=>Trailer magic is Overwritten

Regards,

Sanoj

On Thu, Oct 13, 2016 at 10:22 AM, Raghavendra Gowdappa <rgowdapp at redhat.com>
wrote:

> +Muthu, +Sanoj
>
> Sure Vijay. One of us will take a look.
>
> ----- Original Message -----
> > From: "Vijay Bellur" <vbellur at redhat.com>
> > To: "Gluster Devel" <gluster-devel at gluster.org>, "Raghavendra Gowdappa"
> <rgowdapp at redhat.com>
> > Sent: Wednesday, October 5, 2016 11:25:34 PM
> > Subject: quota-rename.t core in netbsd
> >
> > Hi All,
> >
> > I observed a few crashes due to quota-rename.t in netbsd regression
> > runs [1] [2].  Raghavendra - can you please take a look when you get a
> > chance?
> >
> > The core files and logs cannot be downloaded from the URLs in jenkins
> > job console history for NetBSD. I have logged a bug [3] on the
> > infrastructure for that.
> >
> > Thanks,
> > Vijay
> >
> > [1] https://build.gluster.org/job/netbsd7-regression/942/consoleFull
> >
> > [2]  https://build.gluster.org/job/netbsd7-regression/945/console
> >
> > [3] https://bugzilla.redhat.com/show_bug.cgi?id=1382097
> >
>
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