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Date:      Tue, 26 Oct 2021 16:23:31 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 259458] iflib_rxeof NULL pointer crash with vmxnet3 driver
Message-ID:  <bug-259458-7501-UoHoH5FRFF@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-259458-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-259458-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259458

--- Comment #11 from Andriy Gapon <avg@FreeBSD.org> ---
Also, got a different crash but quite possibly related:

<6>vmx0: link state changed to UP


Fatal trap 12: page fault while in kernel mode
cpuid =3D 0; apic id =3D 00
fault virtual address   =3D 0x1ea09e000
fault code              =3D supervisor read data, page not present
instruction pointer     =3D 0x20:0xffffffff80a5dd07
stack pointer           =3D 0x0:0xfffffe00c85cb930
frame pointer           =3D 0x0:0xfffffe00c85cb960
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                        =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
current process         =3D 0 (if_io_tqg_0)
trap number             =3D 12
panic: page fault
cpuid =3D 0
time =3D 1635193519
KDB: stack backtrace:
 stack1 db_trace_self_wrapper+0x2b vpanic+0x182 panic+0x43 trap_fatal+0x391
trap_pfault+0x4f trap+0x286 calltrap+0x8
 stack2 bounce_bus_dmamap_sync+0x17 iflib_fl_refill+0x31b _task_fn_rx+0x84b
gtaskqueue_run_locked+0xed gtaskqueue_thread_loop+0x7e fork_exit+0x6d
fork_trampoline+0xe
KDB: enter: panic

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