Nicolas Bouchinet a231f5bdfd sysctl: Fix underflow value setting risk in vm_table ... Commit 3b3376f222 ("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: 3b3376f222 ("sysctl.c: fix underflow value setting risk in vm_table") Signed-off-by: Nicolas Bouchinet <nicolas.bouchinet@ssi.gouv.fr> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Kees Cook <kees@kernel.org> Signed-off-by: Joel Granados <joel.granados@kernel.org>		2025-02-17 11:33:46 +01:00
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.gitignore
Makefile
vsyscall-note.S
vsyscall-sigreturn.S
vsyscall-syscall.S
vsyscall-trapa.S
vsyscall.c	sysctl: Fix underflow value setting risk in vm_table	2025-02-17 11:33:46 +01:00
vsyscall.lds.S