diff options
| author | Kees Cook <keescook@chromium.org> | 2017-03-06 12:42:12 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-20 14:49:51 +0200 |
| commit | bbc105f3878b9e69479bfc0a758b4fec64c71cd0 (patch) | |
| tree | a8774c929090a437e03af638089cd77add7bc436 | |
| parent | ed8834ea4f43cf7854de62f8985b01c088ba8a75 (diff) | |
pstore: Shut down worker when unregistering
commit 6330d5534786d5315d56d558aa6d20740f97d80a upstream.
When built as a module and running with update_ms >= 0, pstore will Oops
during module unload since the work timer is still running. This makes sure
the worker is stopped before unloading.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/pstore/platform.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index efab7b64925b..b81ce8ddf14a 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -709,6 +709,7 @@ int pstore_register(struct pstore_info *psi) if (psi->flags & PSTORE_FLAGS_PMSG) pstore_register_pmsg(); + /* Start watching for new records, if desired. */ if (pstore_update_ms >= 0) { pstore_timer.expires = jiffies + msecs_to_jiffies(pstore_update_ms); @@ -731,6 +732,11 @@ EXPORT_SYMBOL_GPL(pstore_register); void pstore_unregister(struct pstore_info *psi) { + /* Stop timer and make sure all work has finished. */ + pstore_update_ms = -1; + del_timer_sync(&pstore_timer); + flush_work(&pstore_work); + if (psi->flags & PSTORE_FLAGS_PMSG) pstore_unregister_pmsg(); if (psi->flags & PSTORE_FLAGS_FTRACE) @@ -830,7 +836,9 @@ static void pstore_timefunc(unsigned long dummy) schedule_work(&pstore_work); } - mod_timer(&pstore_timer, jiffies + msecs_to_jiffies(pstore_update_ms)); + if (pstore_update_ms >= 0) + mod_timer(&pstore_timer, + jiffies + msecs_to_jiffies(pstore_update_ms)); } module_param(backend, charp, 0444); |