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Alan Stern 57baab0f37 fs: sysfs: Fix reference leak in sysfs_break_active_protection() ... commit a90bca2228c0646fc29a72689d308e5fe03e6d78 upstream. The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Fixes: 2afc9166f7 ("scsi: sysfs: Introduce sysfs_{un,}break_active_protection()") Cc: Bart Van Assche <bvanassche@acm.org> Cc: stable@vger.kernel.org Reviewed-by: Bart Van Assche <bvanassche@acm.org> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/8a4d3f0f-c5e3-4b70-a188-0ca433f9e6f9@rowland.harvard.edu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-05-02 16:18:32 +02:00
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dir.c
file.c
group.c
Kconfig
Makefile
mount.c
symlink.c
sysfs.h