Date: Mon, 01 Nov 2021 09:46:28 +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-xegV47nP9Y@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 #13 from Andriy Gapon <avg@FreeBSD.org> --- (In reply to Andriy Gapon from comment #12) Applied the fix but still seeing variations of the crash. The data I see makes me think that somehow concurrent calls to iflib_fl_refill() for the same iflib_fl_t (free list) are happening. One hypothetical possibility is that iflib_stop/iflib_fl_setup are not sufficiently synchronized with the taskqueue threads (that call _task_fn_rx= ).=20 I am not familiar with grouptask / taskqgroup code, but I do not see any drain-like calls. So, I wonder if there could be a race between an enqueued task and the stop/setup operations. --=20 You are receiving this mail because: You are the assignee for the bug.=
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