| Message ID | 20240619083037.1070310-1-a869920004@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] module: Add log information for loading module failures | expand |
On Wed, Jun 19, 2024 at 08:30:37AM +0000, Yusong Gao wrote: > Add log information in kernel-space when loading module failures. > Try to load the unsigned module and the module with bad signature > when set 1 to /sys/module/module/parameters/sig_enforce. > > Unsigned module case: > (linux) insmod unsigned.ko > [ 18.714661] Loading of unsigned module is rejected > insmod: can't insert 'unsigned.ko': Key was rejected by service > (linux) > > Bad signature module case: > (linux) insmod bad_signature.ko > insmod: can't insert 'bad_signature.ko': Key was rejected by service > (linux) > > There have different logging behavior the bad signature case only log > in user-space, add log info for fatal errors in module_sig_check(). > > Signed-off-by: Yusong Gao <a869920004@gmail.com> > --- > V2: Change print level from notice to debug. > --- > kernel/module/signing.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/module/signing.c b/kernel/module/signing.c > index a2ff4242e623..b0c7b30e4d89 100644 > --- a/kernel/module/signing.c > +++ b/kernel/module/signing.c > @@ -113,6 +113,7 @@ int module_sig_check(struct load_info *info, int flags) > * unparseable signatures, and signature check failures -- > * even if signatures aren't required. > */ > + pr_debug("Loading module failed (errno=%d)\n", -err); There are so many debug message, this doesn't help explain why, ie, tha this is a signature issue. Luis
diff --git a/kernel/module/signing.c b/kernel/module/signing.c index a2ff4242e623..b0c7b30e4d89 100644 --- a/kernel/module/signing.c +++ b/kernel/module/signing.c @@ -113,6 +113,7 @@ int module_sig_check(struct load_info *info, int flags) * unparseable signatures, and signature check failures -- * even if signatures aren't required. */ + pr_debug("Loading module failed (errno=%d)\n", -err); return err; }
Add log information in kernel-space when loading module failures. Try to load the unsigned module and the module with bad signature when set 1 to /sys/module/module/parameters/sig_enforce. Unsigned module case: (linux) insmod unsigned.ko [ 18.714661] Loading of unsigned module is rejected insmod: can't insert 'unsigned.ko': Key was rejected by service (linux) Bad signature module case: (linux) insmod bad_signature.ko insmod: can't insert 'bad_signature.ko': Key was rejected by service (linux) There have different logging behavior the bad signature case only log in user-space, add log info for fatal errors in module_sig_check(). Signed-off-by: Yusong Gao <a869920004@gmail.com> --- V2: Change print level from notice to debug. --- kernel/module/signing.c | 1 + 1 file changed, 1 insertion(+)