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erestartsys
2012 Oct 19
0
[PATCHv3] xen/x86: don't corrupt %eip when returning from a signal handler
From: David Vrabel <david.vrabel@citrix.com>
In 32 bit guests, if a userspace process has %eax == -ERESTARTSYS
(-512) or -ERESTARTNOINTR (-513) when it is interrupted by an event
/and/ the process has a pending signal then %eip (and %eax) are
corrupted when returning to the main process after handling the
signal. The application may then crash with SIGSEGV or a SIGILL or it
may have subtly incorrect behavi...