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* Out of Character: The sender is exhibiting a significant deviation from their usual behavior, this may indicate that their account has been compromised. Be extra cautious before opening links or attachments. * > On Thu, 19 Mar 2026 11:49:43 +0000 Muhammad Usama Anjum wrote: > >> Stacks and page tables are always accessed with the match‑all tag, >> so assigning a new random tag every time at allocation and setting >> invalid tag at deallocation time, just adds overhead without improving >> the detection. >> >> With __GFP_SKIP_KASAN the page keeps its poison tag and KASAN_TAG_KERNEL >> (match-all tag) is stored in the page flags while keeping the poison tag >> in the hardware. The benefit of it is that 256 tag setting instruction >> per 4 kB page aren't needed at allocation and deallocation time. >> >> Thus match‑all pointers still work, while non‑match tags (other than >> poison tag) still fault. >> >> __GFP_SKIP_KASAN only skips for KASAN_HW_TAGS mode, so coverage is >> unchanged. >> > > Some questions from Sashiko: > https://uk01.z.antigena.com/l/sS6fsklhbbK-vAbd4-t3S20GiqcWENbKuEm9JdfcHhXGvSkAuP_tTYRVNNEFkNyqNy6Th_W67uq4HpyPCykcGaYKaeMj7OPiFdbYLta2AQ6H4~yy59q32QAKn-zpc1DtUKnRNXkTGRIvJMOH217hIWTkitNDDPLzALLhD6vG1MnteYIid8KfwK4pfDahLHbmvBU1WWp6d3BG53WUdBJ4ONjb2PDTe4JdIvW0uWnju-HL5hb > I've updated descriptions/patches in answer to those concerns. Thanks, Usama