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| author | Gordon Tetlow <gordon@FreeBSD.org> | 2018-09-12 04:57:34 +0000 |
|---|---|---|
| committer | Gordon Tetlow <gordon@FreeBSD.org> | 2018-09-12 04:57:34 +0000 |
| commit | c9e562b188682eb9be39a8124893aa172b57d3ca (patch) | |
| tree | f234f964dd81d1ec5c2510e61c2524f2622cc42e /sys/kern/vfs_vnops.c | |
| parent | e382dd47aa55ddba0497a93bdeddcd9ff92b6877 (diff) | |
| download | src-c9e562b188682eb9be39a8124893aa172b57d3ca.tar.gz src-c9e562b188682eb9be39a8124893aa172b57d3ca.zip | |
Correct ELF header parsing code to prevent invalid ELF sections from
disclosing memory.
Submitted by: markj
Reported by: Thomas Barabosch, Fraunhofer FKIE
Approved by: re (implicit)
Approved by: so
Security: FreeBSD-SA-18:12.elf
Security: CVE-2018-6924
Sponsored by: The FreeBSD Foundation
Notes
Notes:
svn path=/head/; revision=338603
Diffstat (limited to 'sys/kern/vfs_vnops.c')
| -rw-r--r-- | sys/kern/vfs_vnops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index 09f665e8f3fb..00392ee3a072 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -527,6 +527,8 @@ vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, int len, off_t offset, struct vn_io_fault_args args; int error, lock_flags; + if (offset < 0 && vp->v_type != VCHR) + return (EINVAL); auio.uio_iov = &aiov; auio.uio_iovcnt = 1; aiov.iov_base = base; |