binfmt_elf: consume a stashed PT_INTERP substitute

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When a binfmt_misc loader entry stashed bprm->loader use it instead of
opening the path named in PT_INTERP. The substitution deliberately
changes as little as possible. Ownership transfers into the local
interpreter reference which the existing success and error paths already
release.

A binary without PT_INTERP has nothing to substitute for. Drop the
override at the end of the segment scan and load the binary natively.

Nothing sets bprm->loader yet.

Link: https://patch.msgid.link/20260721-work-bpf-binfmt_misc-ptinterp-v2-16-e57866e4ae0f@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

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Christian Brauner 2026-07-21 16:13:58 +02:00

parent 73808bc5fd

commit 2a4d517681

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fs/binfmt_elf.c

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