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drivers: block: rnbd: Handle generic ERR_PTR returns safely in find_and_get_or_create_sess()#281

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drivers: block: rnbd: Handle generic ERR_PTR returns safely in find_and_get_or_create_sess()#281
blktests-ci[bot] wants to merge 1 commit intolinus-master_basefrom
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@blktests-ci blktests-ci Bot commented Oct 23, 2025

Pull request for series with
subject: drivers: block: rnbd: Handle generic ERR_PTR returns safely in find_and_get_or_create_sess()
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1013849

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blktests-ci Bot commented Oct 23, 2025

Upstream branch: dd72c8f
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

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blktests-ci Bot commented Oct 27, 2025

Upstream branch: dcb6fa3
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
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blktests-ci Bot commented Oct 27, 2025

Upstream branch: dcb6fa3
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from 68e37f5 to 6ba73f3 Compare October 27, 2025 06:56
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blktests-ci Bot commented Oct 28, 2025

Upstream branch: dcb6fa3
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from 6ba73f3 to 1d28b48 Compare October 28, 2025 06:59
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blktests-ci Bot commented Nov 3, 2025

Upstream branch: 6146a0f
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blktests-ci Bot commented Nov 4, 2025

Upstream branch: c9cfc12
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blktests-ci Bot commented Nov 4, 2025

Upstream branch: c9cfc12
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@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from ae9b7d2 to 1b05f40 Compare November 4, 2025 11:06
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blktests-ci Bot commented Nov 7, 2025

Upstream branch: 4a0c9b3
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@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from 1b05f40 to d4c706b Compare November 7, 2025 02:28
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blktests-ci Bot commented Nov 7, 2025

Upstream branch: 4a0c9b3
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
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@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from d4c706b to 66959fe Compare November 7, 2025 07:11
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blktests-ci Bot commented Nov 10, 2025

Upstream branch: 4a0c9b3
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blktests-ci Bot commented Nov 10, 2025

Upstream branch: e9a6fb0
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blktests-ci Bot commented Nov 14, 2025

Upstream branch: 6da43bb
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blktests-ci Bot commented Nov 16, 2025

Upstream branch: f824272
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

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blktests-ci Bot commented Nov 17, 2025

Upstream branch: f824272
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

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blktests-ci Bot commented Nov 18, 2025

Upstream branch: e7c375b
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

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blktests-ci Bot commented Nov 18, 2025

Upstream branch: e7c375b
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from 03b97bc to 3b0481b Compare November 18, 2025 02:41
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blktests-ci Bot commented Nov 19, 2025

Upstream branch: 8b69055
series: https://patchwork.kernel.org/project/linux-block/list/?series=1013849
version: 1

@ranganathvn @kawasaki
drivers: block: rnbd: Handle generic ERR_PTR returns safely in find_a…
b1c8182 
…nd_get_or_create_sess()

Fix the issue detected by the smatch tool.
drivers/block/rnbd/rnbd-clt.c:1241 find_and_get_or_create_sess()
error: 'sess' dereferencing possible ERR_PTR()

find_and_get_or_create_sess() only checks for ERR_PTR(-ENOMEM) after
calling find_or_create_sess(). In other encoded failures, the code
may dereference the error pointer when accessing sess->nr_poll_queues,
resulting ina kernel oops.

By preserving the existing -ENOMEM behaviour and log unexpected
errors to assist in debugging. This change eliminates a potential
invalid pointer dereference without altering the function's logic
or intenet.

Tested by compiling using smatch tool.

Signed-off-by: Ranganath V N <vnranganath.20@gmail.com>
@blktests-ci blktests-ci Bot force-pushed the series/1013849=>linus-master branch from 3b0481b to b1c8182 Compare November 19, 2025 00:46
@kawasaki kawasaki closed this Nov 20, 2025
@blktests-ci blktests-ci Bot deleted the series/1013849=>linus-master branch November 21, 2025 16:19
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@kawasaki @ranganathvn