mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 14:23:49 +01:00
Daniel Zahka
07bdec3fc7
There are two issues with the way psp_dev is used in nsim_do_psp():
1. There is no check for IS_ERR() on the peers psp_dev, before
dereferencing.
2. The refcount on this psp_dev can be dropped by
nsim_psp_rereg_write()
To fix this, we can make netdevsim's reference to its psp_dev an rcu
reference, and then nsim_do_psp() can read the fields it needs from an
rcu critical section.
Fixes: f857478d62 ("netdevsim: a basic test PSP implementation")
Signed-off-by: Daniel Zahka <[email protected]>
Reviewed-by: Willem de Bruijn <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>