The patch titled
modules: proper cleanup of kobject without CONFIG_SYSFS
has been added to the -mm tree. Its filename is
modules-proper-cleanup-of-kobject-without-config_sysfs.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: modules: proper cleanup of kobject without CONFIG_SYSFS
From: "Denis V. Lunev" <den@xxxxxxxxxx>
kobject: '<NULL>' (ffffffffa0104050): is not initialized, yet kobject_put() is being called.
------------[ cut here ]------------
WARNING: at /home/den/src/linux-netns26/lib/kobject.c:583 kobject_put+0x53/0x55()
Modules linked in: ipv6 nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs ide_cd_mod cdrom button [last unloaded: pktgen]
comm: rmmod Tainted: G W 2.6.26-rc3 #585
Call Trace:
[<ffffffff802359ab>] warn_on_slowpath+0x58/0x7a
[<ffffffff80236aca>] ? printk+0x67/0x69
[<ffffffff80236aca>] ? printk+0x67/0x69
[<ffffffff80324289>] kobject_put+0x53/0x55
[<ffffffff8025e2ee>] free_module+0x87/0xfa
[<ffffffff8025fee5>] sys_delete_module+0x178/0x1e1
[<ffffffff804b1e70>] ? lockdep_sys_exit_thunk+0x35/0x67
[<ffffffff804b1dff>] ? trace_hardirqs_on_thunk+0x35/0x3a
[<ffffffff8020c0bb>] system_call_after_swapgs+0x7b/0x80
---[ end trace 8f5aafa7f6406cf8 ]---
mod->mkobj.kobj is not initialized without CONFIG_SYSFS. Do not call
kobject_put in this case.
Signed-off-by: Denis V. Lunev <den@xxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/module.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff -puN kernel/module.c~modules-proper-cleanup-of-kobject-without-config_sysfs kernel/module.c
--- a/kernel/module.c~modules-proper-cleanup-of-kobject-without-config_sysfs
+++ a/kernel/module.c
@@ -1337,7 +1337,19 @@ out_unreg:
kobject_put(&mod->mkobj.kobj);
return err;
}
-#endif
+
+static void mod_sysfs_fini(struct module *mod)
+{
+ kobject_put(&mod->mkobj.kobj);
+}
+
+#else /* CONFIG_SYSFS */
+
+static void mod_sysfs_fini(struct module *mod)
+{
+}
+
+#endif /* CONFIG_SYSFS */
static void mod_kobject_remove(struct module *mod)
{
@@ -1345,7 +1357,7 @@ static void mod_kobject_remove(struct mo
module_param_sysfs_remove(mod);
kobject_put(mod->mkobj.drivers_dir);
kobject_put(mod->holders_dir);
- kobject_put(&mod->mkobj.kobj);
+ mod_sysfs_fini(mod);
}
/*
_
Patches currently in -mm which might be from den@xxxxxxxxxx are
origin.patch
proc-proc_get_inode-should-get-module-only-once.patch
modules-proper-cleanup-of-kobject-without-config_sysfs.patch
proc-use-non-racy-method-for-proc-page_owner-creation-page_owner.patch
flock-remove-unused-fields-from-file_lock_operations.patch
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