diff options
author | Ed Swierk <eswierk@arastra.com> | 2006-09-25 16:25:36 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-25 17:38:36 -0700 |
commit | 1cc5f7142eca352109895fe20b1fc6405dd17727 (patch) | |
tree | 9c6b4b3204f06317c830457e091ff2c83272ea09 /drivers/media | |
parent | bfa0e9a07cd31f3858239dbc93011b82780acf4b (diff) |
[PATCH] load_module: no BUG if module_subsys uninitialized
Invoking load_module() before param_sysfs_init() is called crashes in
mod_sysfs_setup(), since the kset in module_subsys is not initialized yet.
In my case, net-pf-1 is getting modprobed as a result of hotplug trying to
create a UNIX socket. Calls to hotplug begin after the topology_init
initcall.
Another patch for the same symptom (module_subsys-initialize-earlier.patch)
moves param_sysfs_init() to the subsys initcalls, but this is still not
early enough in the boot process in some cases. In particular,
topology_init() causes /sbin/hotplug to run, which requests net-pf-1 (the
UNIX socket protocol) which can be compiled as a module. Moving
param_sysfs_init() to the postcore initcalls fixes this particular race,
but there might well be other cases where a usermodehelper causes a module
to load earlier still.
The patch makes load_module() return an error rather than crashing the
kernel if invoked before module_subsys is initialized.
Cc: Mark Huang <mlhuang@cs.princeton.edu>
Cc: Greg KH <greg@kroah.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/media')
0 files changed, 0 insertions, 0 deletions