[Bug 213232] [tcp] [panic] tcp_output() Panic String: tcp_output: len > IP_MAXPACKET (at r306658)
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Wed Oct 5 18:46:04 UTC 2016
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213232
Bug ID: 213232
Summary: [tcp] [panic] tcp_output() Panic String: tcp_output:
len > IP_MAXPACKET (at r306658)
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: freebsd-bugs at FreeBSD.org
Reporter: hiren at FreeBSD.org
(kgdb) bt
#0 __curthread () at ./machine/pcpu.h:221
#1 doadump (textdump=492866688) at
/d0/hiren/freebsd/sys/kern/kern_shutdown.c:298
#2 0xffffffff80395066 in db_fncall_generic (nargs=0, addr=<optimized out>,
rv=<optimized out>, args=<optimized out
at /d0/hiren/freebsd/sys/ddb/db_command.c:581
#3 db_fncall (dummy1=<optimized out>, dummy2=<optimized out>,
dummy3=<optimized out>, dummy4=<optimized out>)
at /d0/hiren/freebsd/sys/ddb/db_command.c:629
#4 0xffffffff80394bc9 in db_command (last_cmdp=<optimized out>,
cmd_table=<optimized out>, dopager=<optimized out>
at /d0/hiren/freebsd/sys/ddb/db_command.c:453
#5 0xffffffff80394924 in db_command_loop () at
/d0/hiren/freebsd/sys/ddb/db_command.c:506
#6 0xffffffff803979df in db_trap (type=<optimized out>, code=<optimized out>)
at /d0/hiren/freebsd/sys/ddb/db_main
#7 0xffffffff80a90003 in kdb_trap (type=<optimized out>, code=<optimized out>,
tf=<optimized out>) at /d0/hiren/fr
#8 0xffffffff80ec5ce4 in trap (frame=0xfffffe201d6090f0) at
/d0/hiren/freebsd/sys/amd64/amd64/trap.c:559
#9 <signal handler called>
#10 kdb_enter (why=0xffffffff813f7eb8 "panic", msg=0x80 <error: Cannot access
memory at address 0x80>) at /d0/hiren
#11 0xffffffff80a4e41f in vpanic (fmt=<optimized out>, ap=0xfffffe201d609280)
at /d0/hiren/freebsd/sys/kern/kern_sh
#12 0xffffffff80a4e276 in kassert_panic (fmt=0xffffffff8142a88d "%s: len >
IP_MAXPACKET") at /d0/hiren/freebsd/sys/
#13 0xffffffff80c3660a in tcp_output (tp=<optimized out>) at
/d0/hiren/freebsd/sys/netinet/tcp_output.c:987
#14 0xffffffff80c333a2 in tcp_do_segment (m=<optimized out>, th=<optimized
out>, so=<optimized out>, tp=<optimized
tlen=<optimized out>, iptos=<optimized out>, ti_locked=<error reading
variable: Cannot access memory at address
at /d0/hiren/freebsd/sys/netinet/tcp_input.c:3169
#15 0xffffffff80c2f690 in tcp_input (mp=<optimized out>, offp=<optimized out>,
proto=<optimized out>) at /d0/hiren/
#16 0xffffffff80bbc901 in ip_input (m=0x4) at
/d0/hiren/freebsd/sys/netinet/ip_input.c:809
#17 0xffffffff80b57630 in netisr_dispatch_src (proto=1, source=0,
m=0xfffff807bf186300) at /d0/hiren/freebsd/sys/ne
#18 0xffffffff80b4183a in ether_demux (ifp=<optimized out>, m=0x80) at
/d0/hiren/freebsd/sys/net/if_ethersubr.c:848
#19 0xffffffff80b42637 in ether_input_internal (ifp=<optimized out>, m=0x80) at
/d0/hiren/freebsd/sys/net/if_ethers
#20 ether_nh_input (m=<optimized out>) at
/d0/hiren/freebsd/sys/net/if_ethersubr.c:667
#21 0xffffffff80b57630 in netisr_dispatch_src (proto=5, source=0,
m=0xfffff807bf186300) at /d0/hiren/freebsd/sys/ne
#22 0xffffffff80b41ba2 in ether_input (ifp=<optimized out>, m=0x0) at
/d0/hiren/freebsd/sys/net/if_ethersubr.c:757
#23 0xffffffff805e2dcb in ixgbe_rx_input (rxr=<optimized out>, ifp=<optimized
out>, m=0xfffff807bf186300, ptype=<op
at /d0/hiren/freebsd/sys/dev/ixgbe/ix_txrx.c:1704
#24 ixgbe_rxeof (que=<optimized out>) at
/d0/hiren/freebsd/sys/dev/ixgbe/ix_txrx.c:1985
#25 0xffffffff805da70c in ixgbe_msix_que (arg=0xfffff80114812870) at
/d0/hiren/freebsd/sys/dev/ixgbe/if_ix.c:1572
#26 0xffffffff80a147a6 in intr_event_execute_handlers (p=<optimized out>,
ie=<optimized out>) at /d0/hiren/freebsd/
#27 0xffffffff80a14e26 in ithread_execute_handlers (ie=<optimized out>,
p=<optimized out>) at /d0/hiren/freebsd/sys
#28 ithread_loop (arg=<optimized out>) at
/d0/hiren/freebsd/sys/kern/kern_intr.c:1356
#29 0xffffffff80a11eb4 in fork_exit (callout=0xffffffff80a14d80 <ithread_loop>,
arg=0xfffff801147babe0, frame=0xfff
at /d0/hiren/freebsd/sys/kern/kern_fork.c:1038
#30 <signal handler called>
(kgdb)
This box paniced while sitting idle. Just running -head and no special configs.
ix0 at pci0:4:0:0: class=0x020000 card=0x061115d9 chip=0x10fb8086 rev=0x01
hdr=0x00
vendor = 'Intel Corporation'
device = '82599ES 10-Gigabit SFI/SFP+ Network Connection'
class = network
subclass = ethernet
tso is on.
http://svn.freebsd.org/changeset/base/211317 added the check where its
panicing.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=132832 which caused r211317
I've not looked at it into much detail.
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