diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2019-11-07 08:50:25 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-17 20:38:56 +0100 |
| commit | 589d00cebfc204c579c3212dd3c00a03c298d298 (patch) | |
| tree | 53b64e12b42765eb6162bd96d9d48540aedc35c7 /fs | |
| parent | d83013e02e15826658e25857795270e12e290529 (diff) | |
RDMA/qib: Validate ->show()/store() callbacks before calling them
commit 7ee23491b39259ae83899dd93b2a29ef0f22f0a7 upstream.
The permissions of the read-only or write-only sysfs files can be
changed (as root) and the user can then try to read a write-only file or
write to a read-only file which will lead to kernel crash here.
Protect against that by always validating the show/store callbacks.
Link: https://lore.kernel.org/r/d45cc26361a174ae12dbb86c994ef334d257924b.1573096807.git.viresh.kumar@linaro.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions