wireguard-openbsd/regress/sys/kern/exec_self, branch master WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/regress/sys/kern/exec_self?h=master 2016-03-17T19:40:43Z Last parameter to execl[e]() functions *must* be cast to a pointer. 2016-03-17T19:40:43Z krw krw@openbsd.org 2016-03-17T19:40:43Z urn:sha1:534084640310a3b73784adb5e68a3695b1c4a21c Just NULL is not good practise as NULL is theoretically allowed to be an integer rather than a pointer. Use (char *)NULL consistently instead of scattering a few (char *)0 and (void *)NULL into the mix. Prompted by and probably ok deraadt@ millert@ kettenis@ Definitely ok mestre@ ratchov@ Test for a nasty complication in the exec code. 2002-08-17T22:58:59Z art art@openbsd.org 2002-08-17T22:58:59Z urn:sha1:31bc67ca70481556b6116415c321321e1c04811f What happens is that if an executable tries to exec itself (happens all the time on the ramdisk, among others) and needs to page in a page from the data segment (or rodata) it will need to perform a pagein operation on the vnode that's execing right now. exec keeps that vnode locked and fails (no deadlock, that part was fixed a long time ago).