mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
usb: gadget: Fix double free of device descriptor pointers
Upon driver unbind usb_free_all_descriptors() function frees all
speed descriptor pointers without setting them to NULL. In case
gadget speed changes (i.e from super speed plus to super speed)
after driver unbind only upto super speed descriptor pointers get
populated. Super speed plus desc still holds the stale (already
freed) pointer. Fix this issue by setting all descriptor pointers
to NULL after freeing them in usb_free_all_descriptors().
Fixes: f5c61225cf
("usb: gadget: Update function for SuperSpeedPlus")
cc: stable@vger.kernel.org
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/1619034452-17334-1-git-send-email-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
374157ff88
commit
43c4cab006
1 changed files with 4 additions and 0 deletions
|
@ -194,9 +194,13 @@ EXPORT_SYMBOL_GPL(usb_assign_descriptors);
|
|||
void usb_free_all_descriptors(struct usb_function *f)
|
||||
{
|
||||
usb_free_descriptors(f->fs_descriptors);
|
||||
f->fs_descriptors = NULL;
|
||||
usb_free_descriptors(f->hs_descriptors);
|
||||
f->hs_descriptors = NULL;
|
||||
usb_free_descriptors(f->ss_descriptors);
|
||||
f->ss_descriptors = NULL;
|
||||
usb_free_descriptors(f->ssp_descriptors);
|
||||
f->ssp_descriptors = NULL;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usb_free_all_descriptors);
|
||||
|
||||
|
|
Loading…
Reference in a new issue