On monolythic kernel /sys/modules/*/drivers may not exist (ENOENT) On kernels with enhanced security (e.g. grsecurity), it might not be accessible: EACCESS or EPERM.
Directly try to open if it fails with any of those errors, we fallback on the module name. Signed-off-by: Baptiste Daroussin <[email protected]> Reviewed-by: Peter Krempa <[email protected]> --- src/util/virpci.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/src/util/virpci.c b/src/util/virpci.c index fa04264a95..ec22eac7c9 100644 --- a/src/util/virpci.c +++ b/src/util/virpci.c @@ -1287,8 +1287,21 @@ virPCIDeviceFindDriver(virPCIDevice *dev) moduleDriversDir = g_strdup_printf("/sys/module/%s/drivers", moduleName); - if (virDirOpen(&dir, moduleDriversDir) < 0) + if (virDirOpenQuiet(&dir, moduleDriversDir) < 0) { + /* with monolithic kernels this directory will not exist: ENOENT + * with hardened system like grsecurity or any MAC frameowrk it might be be accessible: + * EACCESS or EPERM. + */ + if (errno == ENOENT || errno == EACCES || errno == EPERM) { + VIR_DEBUG("driver directory not available (%s), using module name as driver name", + moduleDriversDir); + g_free(dev->stubDriverName); + dev->stubDriverName = g_steal_pointer(&moduleName); + return 0; + } + virReportSystemError(errno, _("cannot open directory '%1$s'"), moduleDriversDir); return -1; + } while (virDirRead(dir, &ent, moduleDriversDir) > 0) { -- 2.43.0
