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| author | Vitaliy Gusev <vgusev@openvz.org> | 2010-05-11 14:06:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-11 17:33:42 -0700 |
| commit | 11cad320a4f4bc53d3585c85600c782faa12b99e (patch) | |
| tree | 6e246590d7905d42b7e298817e1df90381a1e9e4 /kernel/acct.c | |
| parent | ab941e0fff3947b6dcc9c578d918d1bba54a6874 (diff) | |
| download | lwn-11cad320a4f4bc53d3585c85600c782faa12b99e.tar.gz lwn-11cad320a4f4bc53d3585c85600c782faa12b99e.zip | |
bsdacct: use del_timer_sync() in acct_exit_ns()
acct_exit_ns --> acct_file_reopen deletes timer without check timer
execution on other CPUs. So acct_timeout() can change an unmapped memory.
Signed-off-by: Vitaliy Gusev <vgusev@openvz.org>
Cc: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/acct.c')
| -rw-r--r-- | kernel/acct.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/kernel/acct.c b/kernel/acct.c index 24f8c81fc48d..e4c0e1fee9b0 100644 --- a/kernel/acct.c +++ b/kernel/acct.c @@ -353,17 +353,18 @@ restart: void acct_exit_ns(struct pid_namespace *ns) { - struct bsd_acct_struct *acct; + struct bsd_acct_struct *acct = ns->bacct; - spin_lock(&acct_lock); - acct = ns->bacct; - if (acct != NULL) { - if (acct->file != NULL) - acct_file_reopen(acct, NULL, NULL); + if (acct == NULL) + return; - kfree(acct); - } + del_timer_sync(&acct->timer); + spin_lock(&acct_lock); + if (acct->file != NULL) + acct_file_reopen(acct, NULL, NULL); spin_unlock(&acct_lock); + + kfree(acct); } /* |