https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243126
Bug ID: 243126
Summary: Assertion fl->ifl_cidx == cidx failed at
/usr/src/sys/net/iflib.c:2531
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: a...@freebsd.org
This happened with FreeBSD head r351653 and if_em interface in a VMware guest.
I have a crash dump.
This is the stack trace:
#11 kdb_enter (why=0xffffffff80bdbcb7 "panic", msg=0xffffffff80bdbcb7 "panic")
at /usr/src/sys/kern/subr_kdb.c:483
#12 0xffffffff8077cff1 in vpanic (fmt=<optimized out>, ap=<optimized out>) at
/usr/src/sys/kern/kern_shutdown.c:987
#13 0xffffffff8077c2cd in kassert_panic (fmt=0xffffffff80b4f01d "Assertion %s
failed at %s:%d") at /usr/src/sys/kern/kern_shutdown.c:879
#14 0xffffffff808b721e in rxd_frag_to_sd (rxq=0xfffffe00003fe000,
irf=<optimized out>, unload=<error reading variable: Cannot access memory at
address 0x0>, sd=0xfffffe0011a54900, pf_rv=0xfffffe0011a549b0,
ri=0xfffffe0011a54960)
at /usr/src/sys/net/iflib.c:2531
#15 0xffffffff808b10e4 in assemble_segments (rxq=<optimized out>,
ri=0x1dd05ea00000000, sd=0xfffff80002d1b470, pf_rv=0x100000000) at
/usr/src/sys/net/iflib.c:2594
#16 iflib_rxd_pkt_get (rxq=<optimized out>, ri=<optimized out>) at
/usr/src/sys/net/iflib.c:2671
#17 iflib_rxeof (rxq=<optimized out>, budget=16) at
/usr/src/sys/net/iflib.c:2803
#18 _task_fn_rx (context=<optimized out>) at /usr/src/sys/net/iflib.c:3795
#19 0xffffffff807c72a9 in gtaskqueue_run_locked (queue=0xfffff80002922600) at
/usr/src/sys/kern/subr_gtaskqueue.c:377
#20 0xffffffff807c7028 in gtaskqueue_thread_loop (arg=<optimized out>) at
/usr/src/sys/kern/subr_gtaskqueue.c:558
#21 0xffffffff8073ce34 in fork_exit (callout=0xffffffff807c6fa0
<gtaskqueue_thread_loop>, arg=0xfffffe00007f9008, frame=0xfffffe0011a54ac0) at
/usr/src/sys/kern/kern_fork.c:1048
I can provide any additional information.
Also, I can do some debugging myself, but I need some help with that as I don't
know iflib code at all.
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