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| author | Mark Johnston <markj@FreeBSD.org> | 2019-10-02 15:45:49 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2019-10-02 15:45:49 +0000 |
| commit | 4a7b33ecf4d85cc3d2fea014db55f3d6af9e6641 (patch) | |
| tree | 63353174c2d0a8a66bfe65d1d8ad2fc38709e3b0 /usr.bin/split | |
| parent | 8495fa081bb0c8a4be80488972fca09c9400f53c (diff) | |
| download | src-4a7b33ecf4d85cc3d2fea014db55f3d6af9e6641.tar.gz src-4a7b33ecf4d85cc3d2fea014db55f3d6af9e6641.zip | |
Disallow fcntl(F_READAHEAD) when the vnode is not a regular file.
The mountpoint may not have defined an iosize parameter, so an attempt
to configure readahead on a device file can lead to a divide-by-zero
crash.
The sequential heuristic is not applied to I/O to or from device files,
and posix_fadvise(2) returns an error when v_type != VREG, so perform
the same check here.
Reported by: syzbot+e4b682208761aa5bc53a@syzkaller.appspotmail.com
Reviewed by: kib
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21864
Notes
Notes:
svn path=/head/; revision=353010
Diffstat (limited to 'usr.bin/split')
0 files changed, 0 insertions, 0 deletions