tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing

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The number of pages per remote ring buffer is capped by
ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
overflow that field would silently allocate a descriptor smaller than
what was asked for.

Return SIZE_MAX from trace_buffer_desc_size() on nr_page_va overflow.

Link: https://patch.msgid.link/20260911193937.602202-3-vdonnefort@google.com
Fixes: 2e67fabd8b ("ring-buffer: Introduce ring-buffer remotes")
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Vincent Donnefort 2026-09-11 20:39:36 +01:00 • committed by Steven Rostedt

parent 442ffa742d

commit d059d8bf2c

2 changed files with 9 additions and 1 deletions

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4

include/linux/ring_buffer.h

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6

kernel/trace/trace_remote.c

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