[Bug 240608] if_vmx(4): iflib - Panic with INVARIANTS: Memory modified after free (12.1-pre-QA)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240608

Andriy Gapon <avg at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |avg at FreeBSD.org,
                   |                            |pkelsey at freebsd.org

--- Comment #8 from Andriy Gapon <avg at FreeBSD.org> ---
I am seeing the same problem with FreeBSD CURRENT as of r351653 (early
September).

As far as I can tell, jumbo frames are not used.
The interface mtu is 1500 and there are no routes with non-default mtu.
The interface driver is also vmxnet3.

Unread portion of the kernel message buffer:
panic: Memory modified after free 0xfffff8017f069800(2048) val=9d671660 @
0xfffff8017f069800

cpuid = 0
time = 1578053135
KDB: stack backtrace:
 stack1 db_trace_self_wrapper+0x2b vpanic+0x1a4 panic+0x43 trash_ctor+0x49
mb_ctor_clust+0x18 uma_zalloc_arg+0xa4d m_cljget+0x8a _iflib_fl_refill+0x511
_task_fn_rx+0xc06 gtaskqueue_run_locked+0x139 gtaskqueue_thread_loop+0x88
fork_exit+0x84 fork_trampoline+0xe
KDB: enter: panic

__curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
55      /usr/src/sys/amd64/include/pcpu_aux.h: No such file or directory.
(kgdb) bt
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55
#1  doadump (textdump=4620928) at /usr/src/sys/kern/kern_shutdown.c:467
#2  0xffffffff8039641c in db_fncall_generic (addr=<optimized out>,
args=<optimized out>, rv=<optimized out>, nargs=<optimized out>) at
/usr/src/sys/ddb/db_command.c:620
#3  db_fncall (dummy1=<optimized out>, dummy2=<optimized out>,
dummy3=<optimized out>, dummy4=<optimized out>) at
/usr/src/sys/ddb/db_command.c:668
#4  0xffffffff80395d39 in db_command (last_cmdp=<optimized out>,
cmd_table=<optimized out>, dopager=0) at /usr/src/sys/ddb/db_command.c:492
#5  0xffffffff8039acd8 in db_script_exec (scriptname=<optimized out>,
warnifnotfound=<optimized out>) at /usr/src/sys/ddb/db_script.c:304
#6  0xffffffff8039ab23 in db_script_kdbenter (eventname=<optimized out>) at
/usr/src/sys/ddb/db_script.c:326
#7  0xffffffff80398d2a in db_trap (type=<optimized out>, code=<optimized out>)
at /usr/src/sys/ddb/db_main.c:251
#8  0xffffffff807c90fc in kdb_trap (type=3, code=0, tf=<optimized out>) at
/usr/src/sys/kern/subr_kdb.c:696
#9  0xffffffff80abe2d4 in trap (frame=0xfffffe0000468580) at
/usr/src/sys/amd64/amd64/trap.c:621
#10 <signal handler called>
#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 0xffffffff8077d073 in panic (fmt=0xffffffff8115abd0 <cnputs_mtx+24> "") at
/usr/src/sys/kern/kern_shutdown.c:921
#14 0xffffffff80a0d399 in trash_ctor (mem=0x80, size=4621632, arg=<optimized
out>, flags=<optimized out>) at /usr/src/sys/vm/uma_dbg.c:82
#15 0xffffffff8075ad68 in mb_ctor_clust (mem=0xfffff8017f069800, size=2048,
arg=0x0, how=128) at /usr/src/sys/kern/kern_mbuf.c:738
#16 0xffffffff80a0783d in uma_zalloc_arg (zone=0xfffff8000289c000, udata=0x0,
flags=<optimized out>) at /usr/src/sys/vm/uma_core.c:2441
#17 0xffffffff80759aca in m_cljget (m=0x0, how=1, size=2048) at
/usr/src/sys/kern/kern_mbuf.c:1392
#18 0xffffffff808b5d71 in _iflib_fl_refill (ctx=0xfffff80002a4b000,
fl=<optimized out>, count=<optimized out>) at /usr/src/sys/net/iflib.c:1986
#19 0xffffffff808b17d6 in __iflib_fl_refill_lt (ctx=<optimized out>,
fl=0xfffff80002a42000, max=24) at /usr/src/sys/net/iflib.c:2079
#20 iflib_rxeof (rxq=0xfffff80002a32000, budget=24) at
/usr/src/sys/net/iflib.c:2823
#21 _task_fn_rx (context=0xfffff80002a32000) at /usr/src/sys/net/iflib.c:3795
#22 0xffffffff807c72a9 in gtaskqueue_run_locked (queue=0xfffff800020a6100) at
/usr/src/sys/kern/subr_gtaskqueue.c:377
#23 0xffffffff807c7028 in gtaskqueue_thread_loop (arg=<optimized out>) at
/usr/src/sys/kern/subr_gtaskqueue.c:558
#24 0xffffffff8073ce34 in fork_exit (callout=0xffffffff807c6fa0
<gtaskqueue_thread_loop>, arg=0xfffffe00003f9008, frame=0xfffffe0000468ac0) at
/usr/src/sys/kern/kern_fork.c:1048

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