Date: Sat, 21 Jun 2025 17:33:40 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 287229] IP reassembly issue in FreeBSD 14.1 Message-ID: <bug-287229-7501-hzUtfTtkFS@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-287229-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-287229-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D287229 --- Comment #36 from Gleb Smirnoff <glebius@FreeBSD.org> --- On Sat Jun 21 08:55:37 2025 UTC, lucas.aubard@irisa.fr wrote: > How can I disable this feature to test if it indeed provokes the observed > reassembly inconsistencies ? Option #1: you can recompile kernel with patched sys/netinet/ip_reass.c. Change the line V_ipq_hashseed =3D arc4random(); to something non-random, e.g.: V_ipq_hashseed =3D 0; Option #2: at runtime, before running any of your experiments run kernel debugger in the write mode: # kgdb -w Now it depends if your kernel is compiled with VIMAGE or without. If compiled without VIMAGE, then it is easy: (kgbd) set ipq_hashseed =3D 0 If compiled without VIMAGE, then more complicated: (kgdb) set *(uint32_t *)(vnet0->vnet_data_base + (uintptr_t)&vnet_entry_ipq_hashseed) =3D 0 --=20 You are receiving this mail because: You are on the CC list for the bug.=
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