component: do not dereference opaque pointer in debugfs

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commit ef9ffc1e5f upstream.

The match data does not have to be a struct device pointer, and indeed
very often is not. Attempt to treat it as such easily results in a
crash.

For the components that are not registered, we don't know which device
is missing. Once it it is there, we can use the struct component to get
the device and whether it's bound or not.

Fixes: 59e73854b5 ('component: add debugfs support')
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: stable <stable@vger.kernel.org>
Cc: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Link: https://lore.kernel.org/r/20191118115431.63626-1-lkundrak@v3.sk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Lubomir Rintel 2019-11-18 12:54:31 +01:00 • committed by Greg Kroah-Hartman

parent 4dcf9797e5

commit 962fe1c3a5

1 changed files with 4 additions and 4 deletions

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drivers/base/component.c

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