Fix kernel memory disclosure in ibcs2_getdents
ibcs2_getdents() copies a dirent structure to userland. The ibcs2 dirent structure contains a 2 byte pad element. This element is never initialized, but copied to userland none-the-less. Note that ibcs2 has not built on HEAD since r302095. Submitted by: Domagoj Stolfa <ds815@cam.ac.uk> Reported by: Ilja Van Sprundel <ivansprundel@ioactive.com> MFC after: 3 days Security: Kernel memory disclosure (803)
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=331329
@ -330,6 +330,7 @@ ibcs2_getdents(struct thread *td, struct ibcs2_getdents_args *uap)
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#define BSD_DIRENT(cp) ((struct dirent *)(cp))
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#define IBCS2_RECLEN(reclen) (reclen + sizeof(u_short))
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memset(&idb, 0, sizeof(idb));
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error = getvnode(td, uap->fd, cap_rights_init(&rights, CAP_READ), &fp);
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if (error != 0)
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return (error);
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