CVS commit: src/sys/kern

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Wed Jul  9 05:50:51 UTC 2014

Modified Files:
        src/sys/kern: subr_kobj.c

Log Message:
 - limit the number of sections with ELF_MAXSHNUM
 - fix the (symstrindex > hdr->e_shnum) check: it should be >=, otherwise 
there's an
   off-by-one
 - fix the (symstrindex < 0) check: the value is unsigned, so it can't be <0. 
However,
   we should ensure that symstrindex!=0 (done with SHN_UNDEF)
 - set 'error' as appropriate
 - ensure that e_shstrndx < hdr->e_shnum, to prevent out-of-bound reads

Fixes several crashes that could occur when loading a kernel module.

Quick glance from martin@


To generate a diff of this commit:
cvs rdiff -u -r1.48 -r1.49 src/sys/kern/subr_kobj.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.