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authorKrister Johansen <kjlx@templeofstupid.com>2023-10-28 00:46:40 +0300
committerLuis Chamberlain <mcgrof@kernel.org>2023-11-01 22:10:02 +0300
commit8001f49394e353f035306a45bcf504f06fca6355 (patch)
tree538778c2480a443486588bcc4fd68f33269e9bba /init/main.c
parentccee9a2a8c002516d4252952df836abeaddfa39c (diff)
downloadlinux-8001f49394e353f035306a45bcf504f06fca6355.tar.xz
proc: sysctl: prevent aliased sysctls from getting passed to init
The code that checks for unknown boot options is unaware of the sysctl alias facility, which maps bootparams to sysctl values. If a user sets an old value that has a valid alias, a message about an invalid parameter will be printed during boot, and the parameter will get passed to init. Fix by checking for the existence of aliased parameters in the unknown boot parameter code. If an alias exists, don't return an error or pass the value to init. Signed-off-by: Krister Johansen <kjlx@templeofstupid.com> Cc: stable@vger.kernel.org Fixes: 0a477e1ae21b ("kernel/sysctl: support handling command line aliases") Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'init/main.c')
-rw-r--r--init/main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 436d73261810..e24b0780fdff 100644
--- a/init/main.c
+++ b/init/main.c
@@ -530,6 +530,10 @@ static int __init unknown_bootoption(char *param, char *val,
{
size_t len = strlen(param);
+ /* Handle params aliased to sysctls */
+ if (sysctl_is_alias(param))
+ return 0;
+
repair_env_string(param, val);
/* Handle obsolete-style parameters */