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H A D | sysfs.c | a942da24 Tue Mar 15 08:28:14 CDT 2022 Dongliang Mu <mudongliangabcd@gmail.com> fs: erofs: add sanity check for kobject in erofs_unregister_sysfs
Syzkaller hit 'WARNING: kobject bug in erofs_unregister_sysfs'. This bug is triggered by injecting fault in kobject_init_and_add of erofs_unregister_sysfs.
Fix this by adding sanity check for kobject in erofs_unregister_sysfs
Note that I've tested the patch and the crash does not occur any more.
Link: https://lore.kernel.org/r/20220315132814.12332-1-dzm91@hust.edu.cn Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com> Fixes: 168e9a76200c ("erofs: add sysfs interface") Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
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