Josh Triplett 9ce71148b0 devpts: if initialization failed, don't crash when opening /dev/ptmx ...

If devpts failed to initialize, it would store an ERR_PTR in the global
devpts_mnt.  A subsequent open of /dev/ptmx would call devpts_new_index,
which would dereference devpts_mnt and crash.

Avoid storing invalid values in devpts_mnt; leave it NULL instead.  Make
both devpts_new_index and devpts_pty_new fail gracefully with ENODEV in
that case, which then becomes the return value to the userspace open call
on /dev/ptmx.

[[email protected]: remove unneeded static]
Signed-off-by: Josh Triplett <[email protected]>
Reported-by: Fengguang Wu <[email protected]>
Reviewed-by: Peter Hurley <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2015-06-30 19:44:58 -07:00

..

inode.c

devpts: if initialization failed, don't crash when opening /dev/ptmx

2015-06-30 19:44:58 -07:00

Makefile

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