Red Hat Bugzilla – Bug 149591
CAN-2005-0178 tty/setsid race
Last modified: 2015-01-04 17:17:10 EST
"Race condition in the setsid function in Linux before 18.104.22.168 allows
local users to cause a denial of service (crash) and possibly access
portions of kernel memory, related to TTY changes, locking, and
We originally believed this issue did not affect 2.4 kernels, however
this appears to be incorrect.
Created attachment 111370 [details]
Proposed patch from Debian
Actually, Alan said "In the 2.4 case your controlling tty is
private not thread group so a setsid() can't race because you can't
setsid in the same thread as is opening current->tty."