Issue 1506758: If MAXFD too high, popen2/subprocess produce MemoryErrors (original) (raw)

Created on 2006-06-15 16:06 by pav3901, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (4)
msg28798 - (view)	Author: Peter Vetere (pav3901)	Date: 2006-06-15 16:06
Both the subprocess and the popen2 modules use the range(...) function to iterate over and close inherited file descriptors when a subprocess is spawned. In the OS environment, it possible (using ulimit -n) to set SC_OPEN_MAX (and thus MAXFD in these modules) to a very high value. This can exhaust the limitations of the range() function, producing a MemoryError. The better thing to do would be to use xrange() instead. In particular, this bug occurs in subprocess._close_fds() and popen2._run_child().
msg28799 - (view)	Author: Peter Vetere (pav3901)	Date: 2006-06-15 16:15
Logged In: YES user_id=652852 I've submitted a patch against release24-maint for this bug: 1506760
msg28800 - (view)	Author: Peter Vetere (pav3901)	Date: 2006-06-15 19:31
Logged In: YES user_id=652852 I've submitted a patch against release24-maint for this bug: 1506760
msg28801 - (view)	Author: Peter Åstrand (astrand) *	Date: 2006-06-22 20:32
Logged In: YES user_id=344921 Patch 1506760 has been applied.