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author | Dan Rosenberg <drosenberg@vsecurity.com> | 2010-09-27 20:30:28 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-28 03:29:06 +0400 |
commit | 252a52aa4fa22a668f019e55b3aac3ff71ec1c29 (patch) | |
tree | 93e0def0cef2ba85c203f2c20b86cda4b6190843 /arch | |
parent | 95929eff2cb01e9858779283795f4e3943ee020d (diff) | |
download | linux-252a52aa4fa22a668f019e55b3aac3ff71ec1c29.tar.xz |
Fix pktcdvd ioctl dev_minor range check
The PKT_CTRL_CMD_STATUS device ioctl retrieves a pointer to a
pktcdvd_device from the global pkt_devs array. The index into this
array is provided directly by the user and is a signed integer, so the
comparison to ensure that it falls within the bounds of this array will
fail when provided with a negative index.
This can be used to read arbitrary kernel memory or cause a crash due to
an invalid pointer dereference. This can be exploited by users with
permission to open /dev/pktcdvd/control (on many distributions, this is
readable by group "cdrom").
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
[ Rather than add a cast, just make the function take the right type -Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions