Felix GuandGreg Kroah-Hartman d2759d4986 iio: buffer: hw-consumer: fix use-after-free in error path ...

commit 6f5ed4f2c7 upstream.

In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code
was using list_for_each_entry() to iterate through buffers while calling
iio_buffer_put() which can free the current buffer if refcount drops to 0.
The list_for_each_entry() loop macro then evaluates buf->head.next to
continue iteration, accessing the freed buffer.

Fix this by using list_for_each_entry_safe().

Fixes: 48b66f8f93 ("iio: Add hardware consumer buffer support")
Reported-by: sashiko <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260427-iio_buf-v1-1-2bbdac844647%40gmail.com
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Maxwell Doose <m32285159@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-06-19 13:37:01 +02:00

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industrialio-buffer-cb.c

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industrialio-buffer-dma.c

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industrialio-buffer-dmaengine.c

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industrialio-hw-consumer.c

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industrialio-triggered-buffer.c

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Kconfig

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kfifo_buf.c

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Makefile

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