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We cannot open file for reading and executing (O_RDONLY | O_EXEC).

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Well, in theory we can pass those two flags, because O_RDONLY is 0,
but we won't be able to read from a descriptor opened with O_EXEC.

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Sponsored by:	FreeBSD Foundation
MFC after:	2 weeks
This commit is contained in:
pjd 2012-09-25 21:11:40 +00:00
parent 1d5d62ac36
commit 8e4b011dc5
1 changed files with 3 additions and 3 deletions
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6
sys/kern/kern_exec.c
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@ -441,10 +441,10 @@ do_execve(td, args, mac_p)
} else {
AUDIT_ARG_FD(args->fd);
/*
* Some might argue that CAP_READ and/or CAP_MMAP should also
* be required here; such arguments will be entertained.
* Some might argue that CAP_MMAP should also be required here;
* such arguments will be entertained.
*
* Descriptors opened only with O_EXEC or O_RDONLY are allowed.
* Descriptors opened only with O_EXEC are allowed.
*/
error = fgetvp_exec(td, args->fd, CAP_FEXECVE, &binvp);
if (error)