Date: Wed, 17 Feb 2021 20:07:05 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 253587] pf: page fault in pf_pull_hdr Message-ID: <bug-253587-227-TeGCU1LuOm@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-253587-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253587 Kristof Provost <kp@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kp@freebsd.org --- Comment #1 from Kristof Provost <kp@freebsd.org> --- I am very confused by this panic. I initially thought that pf didn't account for mbufs with external storage, but the network stack should already have fixed that for us. The mbuf has m_len == 0, which shouldn't be possible. The network stack would have done m_pullup(), and has in any event has done mtod(m, struct ip6_hdr) without issue. Additionally, the pf_test6() function has also done this without issue. It's also not clear how pf_pull_hdr() can get a valid m pointer and yet call m_copydata() with a NULL mbuf pointer. -- You are receiving this mail because: You are the assignee for the bug.help
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