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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Guangshuo Li
761b785a0c
intel_th_output_open() looks up the output device with bus_find_device_by_devt(), which returns the device with a reference that must be dropped after use. commit95fc36a234("intel_th: fix device leak on output open()") attempted to drop the reference from intel_th_output_release(). However, a successful open replaces file->f_op with the output driver file operations before returning, so close runs the output driver release callback instead. For MSC outputs, close runs intel_th_msc_release(), which only removes the per-file iterator and does not drop the device reference taken by intel_th_output_open(). Consequently, every successful MSC output open leaks one device reference. Drop the device reference from intel_th_msc_release(), which is the release path actually used for MSC output files. Remove the now-unused intel_th_output_release() callback from intel_th_output_fops. Fixes:95fc36a234("intel_th: fix device leak on output open()") Cc: stable <[email protected]> Signed-off-by: Guangshuo Li <[email protected]> Reviewed-by: Johan Hovold <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>