kern/174822: Page fault in tcp_discardcb under high traffic

[vishal kumar]

Hi Adam, did you find any solution for this crash. I too facing a similar
crash in my system:

#0  doadump () at  /src/freebsd/sys/kern/kern_shutdown.c:267
#1  0xffffffff80497140 in boot (howto=260) at 
/src/freebsd/sys/kern/kern_shutdown.c:495
#2  0xffffffff804978af in panic (fmt=0x0) at
/src/freebsd/sys/kern/kern_shutdown.c:693
#3  0xffffffff8071378f in trap_fatal (frame=0xffffff00025a9468,
eva=18446744071571844127) at  /src/freebsd/sys/amd64/amd64/trap.c:817
#4  0xffffffff80713c3f in trap_pfault (frame=0xffffff80000612a0, usermode=0)
at  /src/freebsd/sys/amd64/amd64/trap.c:714
#5  0xffffffff8071402c in trap (frame=0xffffff80000612a0) at 
/src/freebsd/sys/amd64/amd64/trap.c:464
#6  0xffffffff806fb164 in calltrap () at 
/src/freebsd/sys/amd64/amd64/exception.S:224
#7  0xffffffff805adc06 in tcp_discardcb (tp=0x0) at 
/src/freebsd/sys/netinet/tcp_subr.c:849
#8  0xffffffff805b7475 in tcp_usr_detach (so=Variable "so" is not
available.) at  /src/freebsd/sys/netinet/tcp_usrreq.c:235
#9  0xffffffff804fc6d4 in sofree (so=0xffffff001110e000) at 
/src/freebsd/sys/kern/uipc_socket.c:753
#10 0xffffffff8059fbfb in tcp_do_segment (m=0xffffff0066233500, th=0x1,
so=0xffffff001110e000, tp=0xffffff0025e5b3a0, drop_hdrlen=52, tlen=0,
iptos=0 '\0', ti_locked=3) at  /src/freebsd/sys/netinet/tcp_input.c:4350
#11 0xffffffff805a5677 in tcp_input (m=0xffffff0066233500, off0=Variable
"off0" is not available.) at  /src/freebsd/sys/netinet/tcp_input.c:1723
#12 0xffffffff8058faac in ip_input (m=0xffffff0066233500) at 
/src/freebsd/sys/netinet/ip_input.c:1720
#13 0xffffffff80565139 in swi_net (arg=Variable "arg" is not available.) at 
/src/freebsd/sys/net/netisr.c:739
#14 0xffffffff8046f2f4 in intr_event_execute_handlers (p=Variable "p" is not
available.) at  /src/freebsd/sys/kern/kern_intr.c:1233
#15 0xffffffff804709a5 in ithread_loop (arg=0xffffff00024c1980) at 
/src/freebsd/sys/kern/kern_intr.c:1246
#16 0xffffffff8046ccc8 in fork_exit ( callout=0xffffffff80470910
<ithread_loop>, arg=0xffffff00024c1980, frame=0xffffff8000061c40) at 
/src/freebsd/sys/kern/kern_fork.c:866
#17 0xffffffff806fb5be in fork_trampoline () at 
/src/freebsd/sys/amd64/amd64/exception.S:565
#18 0x0000000000000000 in ?? ()



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