On 17.04.20 13:54, Juergen Gross wrote:
Today it can happen that an event channel is being removed from the system while the event handling loop is active. This can lead to a race resulting in crashes or WARN() splats. Fix this problem by using a rwlock taken as reader in the event handling loop and as writer when removing an event channel. As the observed problem was a NULL dereference in evtchn_from_irq() make this function more robust against races by testing the irq_info pointer to be not NULL before dereferencing it. Cc: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Reported-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Please ignore, script went wild. Juergen
