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remoteproc: core: Fix rproc->firmware free in rproc_set_firmware() 

rproc_alloc_firmware() (called by rproc_alloc()) can allocate
rproc->firmware using kstrdup_const() and therefore should be freed
using kfree_const(); however, rproc_set_firmware() frees it using the
simple kfree(). This causes a kernel oops if a constant string is passed
to rproc_alloc() and rproc_set_firmware() is subsequently called.

Fix the above issue by using kfree_const() to free rproc->firmware in
rproc_set_firmware().

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Link: https://lore.kernel.org/r/20210118165904.719999-1-daniele.alessandrelli@linux.intel.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Daniele Alessandrelli 2021-01-18 16:59:04 +00:00 committed by Bjorn Andersson
parent ca23ecfdbd
commit 43d3f2c715
1 changed files with 1 additions and 1 deletions
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2
drivers/remoteproc/remoteproc_core.c
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@ -1988,7 +1988,7 @@ int rproc_set_firmware(struct rproc *rproc, const char *fw_name)
goto out;
}
kfree(rproc->firmware);
kfree_const(rproc->firmware);
rproc->firmware = p;
out: