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| author | Nicolas Bouchinet <[email protected]> | 2025-01-15 13:22:09 +0000 |
|---|---|---|
| committer | Joel Granados <[email protected]> | 2025-02-17 10:33:46 +0000 |
| commit | a231f5bdfdd0ac402656d82ee7e6c54ec86c0c3b (patch) | |
| tree | 93209dec18e37ff1999229128e4790683d3d775a /net/unix/unix_bpf.c | |
| parent | coredump: Fixes core_pipe_limit sysctl proc_handler (diff) | |
| download | kernel-a231f5bdfdd0ac402656d82ee7e6c54ec86c0c3b.tar.gz kernel-a231f5bdfdd0ac402656d82ee7e6c54ec86c0c3b.zip | |
sysctl: Fix underflow value setting risk in vm_table
Commit 3b3376f222e3 ("sysctl.c: fix underflow value setting risk in vm_table")
fixes underflow value setting risk in vm_table but misses vdso_enabled
sysctl.
vdso_enabled sysctl is initialized with .extra1 value as SYSCTL_ZERO to
avoid negative value writes but the proc_handler is proc_dointvec and
not proc_dointvec_minmax and thus do not uses .extra1 and .extra2.
The following command thus works :
`# echo -1 > /proc/sys/vm/vdso_enabled`
This patch properly sets the proc_handler to proc_dointvec_minmax.
In addition to .extra1, .extra2 is set to SYSCTL_ONE. The sysctl is
thus bounded between 0 and 1.
Fixes: 3b3376f222e3 ("sysctl.c: fix underflow value setting risk in vm_table")
Signed-off-by: Nicolas Bouchinet <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Signed-off-by: Joel Granados <[email protected]>
Diffstat (limited to 'net/unix/unix_bpf.c')
0 files changed, 0 insertions, 0 deletions