Hi Mathieu, url: https://github.com/0day-ci/linux/commits/Mathieu-Poirier/remoteproc-Add-support-for-detaching-a-remote-processor/20210212-075607 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: ia64-randconfig-m031-20210209 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/remoteproc/remoteproc_core.c:2080 rproc_detach() error: double free of 'rproc->cached_table' vim +2080 drivers/remoteproc/remoteproc_core.c eab58da78fe46f Mathieu Poirier 2021-02-11 2069 /* clean up all acquired resources */ eab58da78fe46f Mathieu Poirier 2021-02-11 2070 rproc_resource_cleanup(rproc); eab58da78fe46f Mathieu Poirier 2021-02-11 2071 eab58da78fe46f Mathieu Poirier 2021-02-11 2072 /* release HW resources if needed */ eab58da78fe46f Mathieu Poirier 2021-02-11 2073 rproc_unprepare_device(rproc); eab58da78fe46f Mathieu Poirier 2021-02-11 2074 eab58da78fe46f Mathieu Poirier 2021-02-11 2075 rproc_disable_iommu(rproc); eab58da78fe46f Mathieu Poirier 2021-02-11 2076 66e2fed7a4bb20 Mathieu Poirier 2021-02-11 2077 /* Free the copy of the resource table */ 66e2fed7a4bb20 Mathieu Poirier 2021-02-11 2078 kfree(rproc->cached_table); ^^^^^^^^^^^^^^^^^^^^^^^^^^ eab58da78fe46f Mathieu Poirier 2021-02-11 2079 /* Follow the same sequence as in rproc_shutdown() */ eab58da78fe46f Mathieu Poirier 2021-02-11 @2080 kfree(rproc->cached_table); ^^^^^^^^^^^^^^^^^^^^^^^^^^ Double free. eab58da78fe46f Mathieu Poirier 2021-02-11 2081 rproc->cached_table = NULL; 66e2fed7a4bb20 Mathieu Poirier 2021-02-11 2082 rproc->clean_table = NULL; eab58da78fe46f Mathieu Poirier 2021-02-11 2083 rproc->table_ptr = NULL; 66e2fed7a4bb20 Mathieu Poirier 2021-02-11 2084 eab58da78fe46f Mathieu Poirier 2021-02-11 2085 out: eab58da78fe46f Mathieu Poirier 2021-02-11 2086 mutex_unlock(&rproc->lock); eab58da78fe46f Mathieu Poirier 2021-02-11 2087 return ret; eab58da78fe46f Mathieu Poirier 2021-02-11 2088 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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