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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2007-05-09 02:34:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-09 12:30:52 -0700 |
| commit | c214b2cc5f9be7c236f9b91acf524688ff0e3e72 (patch) | |
| tree | 9edffda8f78422d01219dacf9ab2fb0104302a1d /net | |
| parent | 1634c48f8b85dcb05101f1eb2eab9af40b5976da (diff) | |
| download | linux-c214b2cc5f9be7c236f9b91acf524688ff0e3e72.tar.gz linux-c214b2cc5f9be7c236f9b91acf524688ff0e3e72.tar.bz2 linux-c214b2cc5f9be7c236f9b91acf524688ff0e3e72.zip | |
ipvs: flush defense_work before module unload
net/ipv4/ipvs/ip_vs_core.c
module_exit
ip_vs_cleanup
ip_vs_control_cleanup
cancel_rearming_delayed_work
// done
This is unsafe. The module may be unloaded and the memory may be freed
while defense_work's handler is still running/preempted.
Do flush_work(&defense_work.work) after cancel_rearming_delayed_work().
Alternatively, we could add flush_work() to cancel_rearming_delayed_work(),
but note that we can't change cancel_delayed_work() in the same manner
because it may be called from atomic context.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ipvs/ip_vs_ctl.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c index b3050a6817e7..342e836677a1 100644 --- a/net/ipv4/ipvs/ip_vs_ctl.c +++ b/net/ipv4/ipvs/ip_vs_ctl.c @@ -2387,6 +2387,7 @@ void ip_vs_control_cleanup(void) EnterFunction(2); ip_vs_trash_cleanup(); cancel_rearming_delayed_work(&defense_work); + flush_work_keventd(&defense_work.work); ip_vs_kill_estimator(&ip_vs_stats); unregister_sysctl_table(sysctl_header); proc_net_remove("ip_vs_stats"); |