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selftests: ublk: Reject excess backing files - #1280

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Pull request for series with
subject: selftests: ublk: Reject excess backing files
version: 1
url: https://patchwork.kernel.org/series/1161358/

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Upstream branch: 893e117
series: https://patchwork.kernel.org/series/1161358/
version: 1

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Upstream branch: 50d05c7
series: https://patchwork.kernel.org/series/1161358/
version: 1

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Upstream branch: 5225b8e
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from dbe03bd to 48d8174 Compare September 12, 2026 02:29
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Upstream branch: 2f0c1cf
series: https://patchwork.kernel.org/series/1161358/
version: 1

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Upstream branch: 2f0c1cf
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 6bcfd27 to bb75867 Compare September 13, 2026 22:58
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Upstream branch: 5878583
series: https://patchwork.kernel.org/series/1161358/
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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from bb75867 to d45066f Compare September 15, 2026 09:32
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Upstream branch: 4982d35
series: https://patchwork.kernel.org/series/1161358/
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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from d45066f to 026653c Compare September 17, 2026 19:52
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Upstream branch: 5dd1818
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 026653c to bb678d2 Compare September 18, 2026 13:42
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Upstream branch: 6a5719c
series: https://patchwork.kernel.org/series/1161358/
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Upstream branch: 551c722
series: https://patchwork.kernel.org/series/1161358/
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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 345dd5a to 9eeead6 Compare October 1, 2026 16:14
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Upstream branch: ce1e022
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 9eeead6 to ad5a7f7 Compare October 1, 2026 23:53
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Upstream branch: e767a4e
series: https://patchwork.kernel.org/series/1161358/
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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from ad5a7f7 to b587a04 Compare October 3, 2026 10:16
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Upstream branch: a74306e
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from b587a04 to e776c97 Compare October 3, 2026 22:25
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Upstream branch: None
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from e776c97 to 68f9631 Compare October 5, 2026 02:32
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Upstream branch: 22430ae
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 68f9631 to 65d9548 Compare October 6, 2026 13:17
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Upstream branch: 69f80fe
series: https://patchwork.kernel.org/series/1161358/
version: 1

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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from 65d9548 to a65cd9f Compare October 6, 2026 17:30
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Upstream branch: 7b63ef2
series: https://patchwork.kernel.org/series/1161358/
version: 1

kublk stores at most MAX_BACK_FILES backing file arguments. The
argument parser currently stops collecting paths when that limit is
reached and silently ignores any remaining paths.

Reject the command instead so that a test cannot accidentally run with
fewer backing files than requested. Add a regression test that exercises
the error without requiring a ublk device.

Fixes: 6aecda0 ("selftests: ublk: add kernel selftests for ublk")
Assisted-by: LLM
Signed-off-by: Ruben Sutton <ruben@scstudios.tech>
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blktests-ci-kpd Bot force-pushed the series/1161358=>linus-master branch from a65cd9f to 2fa9b34 Compare October 7, 2026 16:17
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