perf symbol-minimal: Fix ehdr reading in filename__read_build_id

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The e_ident is part of the ehdr and so reading it a second time would
mean the read ehdr was displaced by 16-bytes. Switch from stdio to
open/read/lseek syscalls for similarity with the symbol-elf version of
the function and so that later changes can alter then open flags.

Fixes: fef8f648bb ("perf symbol: Fix use-after-free in filename__read_build_id")
Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250823000024.724394-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

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Ian Rogers 2025-08-22 17:00:23 -07:00 • committed by Namhyung Kim

parent f79a62f4b3

commit ba0b7081f7

1 changed files with 27 additions and 28 deletions

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tools/perf/util/symbol-minimal.c

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