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Date:      Tue, 16 Apr 2013 10:56:31 -0700
From:      Cy Schubert <Cy.Schubert@komquats.com>
To:        current@freebsd.org
Cc:        cschuber@gmail.com
Subject:   Stack Overflow in GEOM
Message-ID:  <201304161756.r3GHuVmu003474@slippy.cwsent.com>

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Has anyone see this before? Just updated my CURRENT partitions on my 
testbed and laptop. The laptop just boots but I've managed to capture this 
on my testbed (attached to a serial port on another system).

This is HEAD from yesterday (Apr 15) morning (PDT). The partition being 
booted is ada0s1d. On my laptop it's ada0s3a. KSTACK_PAGES is 4. Is there a 
way to quickly display that kern.kstack_pages from DDB?

ada0 at ata0 bus 0 scbus0 target 0 lun 0
ada0: <SAMSUNG SP0802N TK100-24> ATA-7 device
ada0: 100.000MB/s transfers (UDMA5, PIO 8192bytes)
ada0: 76351MB (156368016 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad0
ada1 at ata0 bus 0 scbus0 target 1 lun 0
ada1: <Maxtor 6Y120P0 YAR41BW0> ATA-7 device
ada1: 133.000MB/s transfers (UDMA6, PIO 8192bytes)
ada1: 117246MB (240121728 512 byte sectors: 16H 63S/T 16383C)
ada1: Previously was known as ad1
ada2 at ata2 bus 0 scbus2 target 0 lun 0
ada2: <WDC WD5000AAKS-00D2B0 12.01C02> ATA-8 SATA 2.x device
ada2: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
ada2: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)
ada2: Previously was known as ad4
ada3 at ata3 bus 0 scbus3 target 0 lun 0
ada3: <WDC WD3200KS-00PFB0 21.00M21> ATA-7 SATA 2.x device
ada3: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
ada3: 305245MB (625142448 512 byte sectors: 16H 63S/T 16383C)
ada3: Previously was known as ad6
SMP: AP CPU #1 Launched!
panic: stack overflow detected; backtrace may be corrupted
cpuid = 1
KDB: enter: panic
[ thread pid 13 tid 100009 ]
Stopped at      kdb_enter+0x3d: movl    $0,kdb_why
db> bt
Tracing pid 13 tid 100009 td 0x872d6000
kdb_enter(80ca7886,80ca7886,80ca9523,86edcae0,1,...) at 
kdb_enter+0x3d/frame 0x86edca98
panic(80ca9523,86edcb70,80713dd2,86edcbd8,86edcafc,...) at 
panic+0x141/frame 0x86edcad4
__stack_chk_init(86edcbd8,86edcafc,86edcaf8,86edcafc,64,...) at 
__stack_chk_init/frame 0x86edcae0
g_label_disk_ident_taste(87b7dc80,86edcbd8,80,0,0,...) at 
g_label_disk_ident_taste+0x102/frame 0x86edcb70
g_label_taste(80d26b88,872ff500,0,872ff480,872d6000,...) at 
g_label_taste+0x3ca/frame 0x86edcc6c
g_new_provider_event(872ff500,0,25c,80c9798e,0,...) at 
g_new_provider_event+0xb1/frame 0x86edcc88
g_run_events(0,86edcd08,222db60d,83725616,b10094f2,...) at 
g_run_events+0x19f/frame 0x86edccc4
fork_exit(8070d140,0,86edcd08) at fork_exit+0xa3/frame 0x86edccf4
fork_trampoline() at fork_trampoline+0x8/frame 0x86edccf4
--- trap 0, eip = 0, esp = 0x86edcd40, ebp = 0 ---
db> 

I've been poking at this off and on last night. Any ideas?


-- 
Cheers,
Cy Schubert <Cy.Schubert@komquats.com>
FreeBSD UNIX:  <cy@FreeBSD.org>   Web:  http://www.FreeBSD.org





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