Date: Sun, 10 Dec 2023 15:56:33 +0000 From: bugzilla-noreply@freebsd.org To: wireless@FreeBSD.org Subject: [Bug 275616] bwn driver causes kernel panic after connect Message-ID: <bug-275616-21060-sjrXZYA1pa@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-275616-21060@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275616 --- Comment #14 from Mark Johnston <markj@FreeBSD.org> --- Hmm, for bwn vap->iv_ic->ic_headroom is pretty big, it's equal to sizeof(struct bwn_txhdr), which is 118 bytes. So, ieee80211_mbuf_adjust() is going to set needed_space = 118 + 24 + 8 for CCMP. If ieee80211_mbuf_adjust() needs to allocate a new mbuf header, the header will have MHLEN - 150 = 10 bytes of space. The assertion "needed_space <= MHLEN" should actually be "needed_space + sizeof(struct ether_header) <= MHLEN", and I suspect that that assertion would fail for bwn. I'm not sure what changed in 14.0 to break - maybe struct mbuf layout changes that made MHLEN smaller? -- You are receiving this mail because: You are the assignee for the bug.home | help
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