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| author | Kees Cook <[email protected]> | 2018-03-09 19:30:20 +0000 |
|---|---|---|
| committer | James Morris <[email protected]> | 2018-03-19 04:49:32 +0000 |
| commit | 7bd698b3c04e61ee9e03d4c2a55003f75df14dca (patch) | |
| tree | d15e529bab47370611aa871465662775f9798027 /scripts/gcc-plugins/randomize_layout_plugin.c | |
| parent | usb, signal, security: only pass the cred, not the secid, to kill_pid_info_as... (diff) | |
| download | kernel-7bd698b3c04e61ee9e03d4c2a55003f75df14dca.tar.gz kernel-7bd698b3c04e61ee9e03d4c2a55003f75df14dca.zip | |
exec: Set file unwritable before LSM check
The LSM check should happen after the file has been confirmed to be
unchanging. Without this, we could have a race between the Time of Check
(the call to security_kernel_read_file() which could read the file and
make access policy decisions) and the Time of Use (starting with
kernel_read_file()'s reading of the file contents). In theory, file
contents could change between the two.
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Mimi Zohar <[email protected]>
Signed-off-by: James Morris <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/randomize_layout_plugin.c')
0 files changed, 0 insertions, 0 deletions