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| author | Miklos Szeredi <[email protected]> | 2015-12-04 18:18:48 +0000 |
|---|---|---|
| committer | Al Viro <[email protected]> | 2015-12-06 17:28:23 +0000 |
| commit | acff81ec2c79492b180fade3c2894425cd35a545 (patch) | |
| tree | da3c7514877f6881b8be76e203614917227be52a /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | |
| parent | Linux 4.4-rc3 (diff) | |
| download | kernel-acff81ec2c79492b180fade3c2894425cd35a545.tar.gz kernel-acff81ec2c79492b180fade3c2894425cd35a545.zip | |
ovl: fix permission checking for setattr
[Al Viro] The bug is in being too enthusiastic about optimizing ->setattr()
away - instead of "copy verbatim with metadata" + "chmod/chown/utimes"
(with the former being always safe and the latter failing in case of
insufficient permissions) it tries to combine these two. Note that copyup
itself will have to do ->setattr() anyway; _that_ is where the elevated
capabilities are right. Having these two ->setattr() (one to set verbatim
copy of metadata, another to do what overlayfs ->setattr() had been asked
to do in the first place) combined is where it breaks.
Signed-off-by: Miklos Szeredi <[email protected]>
Cc: <[email protected]>
Signed-off-by: Al Viro <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
0 files changed, 0 insertions, 0 deletions