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author | Joel Granados <j.granados@samsung.com> | 2023-11-21 14:02:18 +0300 |
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committer | Luis Chamberlain <mcgrof@kernel.org> | 2023-12-28 15:57:57 +0300 |
commit | 315552310c7de92baea4e570967066569937a843 (patch) | |
tree | 13c9a1058f695bb2b16b6dae36be99fe3ff92ccd /lib/test_sysctl.c | |
parent | 05c1a8d01facb9b24ab267929be94f9fc5ca686d (diff) | |
download | linux-315552310c7de92baea4e570967066569937a843.tar.xz |
sysctl: Fix out of bounds access for empty sysctl registers
When registering tables to the sysctl subsystem there is a check to see
if header is a permanently empty directory (used for mounts). This check
evaluates the first element of the ctl_table. This results in an out of
bounds evaluation when registering empty directories.
The function register_sysctl_mount_point now passes a ctl_table of size
1 instead of size 0. It now relies solely on the type to identify
a permanently empty register.
Make sure that the ctl_table has at least one element before testing for
permanent emptiness.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202311201431.57aae8f3-oliver.sang@intel.com
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'lib/test_sysctl.c')
0 files changed, 0 insertions, 0 deletions