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author | Dan Rosenberg <dan.j.rosenberg@gmail.com> | 2010-07-19 16:58:20 -0400 |
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committer | Chris Mason <chris.mason@oracle.com> | 2010-07-19 16:58:20 -0400 |
commit | 2ebc3464781ad24474abcbd2274e6254689853b5 (patch) | |
tree | 3d58dfcc14948672c0aac1636cdd57cbe46a135d /samples/kobject | |
parent | b5384d48f4e74edec3ca1887cb65e378a72af9a1 (diff) |
Btrfs: fix checks in BTRFS_IOC_CLONE_RANGE
1. The BTRFS_IOC_CLONE and BTRFS_IOC_CLONE_RANGE ioctls should check
whether the donor file is append-only before writing to it.
2. The BTRFS_IOC_CLONE_RANGE ioctl appears to have an integer
overflow that allows a user to specify an out-of-bounds range to copy
from the source file (if off + len wraps around). I haven't been able
to successfully exploit this, but I'd imagine that a clever attacker
could use this to read things he shouldn't. Even if it's not
exploitable, it couldn't hurt to be safe.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
cc: stable@kernel.org
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'samples/kobject')
0 files changed, 0 insertions, 0 deletions