[PATCH] Fix sighand->siglock usage in kernel/acct.c

a4afee02 · OGAWA Hirofumi <[email protected]> · 2006-07-14 00:24:18 -07:00

IRQs must be disabled before taking ->siglock.

Noticed by lockdep.

Signed-off-by: OGAWA Hirofumi <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: a4afee02a5dd4f20c08fca26e9b610e72d0bcbf0
Parents: 3e143475

Changes

1 files changed · +2 −2

File	Status	Add	Del	Content
kernel/acct.c	modified	+2	−2	View file

kernel/acct.c

View file

diff --git a/kernel/acct.c b/kernel/acct.c
index f18e0b8..2a7c933 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -488,7 +488,7 @@ static void do_acct_process(struct file *file)
 		old_encode_dev(tty_devnum(current->signal->tty)) : 0;
 	read_unlock(&tasklist_lock);
 
-	spin_lock(&current->sighand->siglock);
+	spin_lock_irq(&current->sighand->siglock);
 	ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
 	ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
 	ac.ac_flag = pacct->ac_flag;
@@ -496,7 +496,7 @@ static void do_acct_process(struct file *file)
 	ac.ac_minflt = encode_comp_t(pacct->ac_minflt);
 	ac.ac_majflt = encode_comp_t(pacct->ac_majflt);
 	ac.ac_exitcode = pacct->ac_exitcode;
-	spin_unlock(&current->sighand->siglock);
+	spin_unlock_irq(&current->sighand->siglock);
 	ac.ac_io = encode_comp_t(0 /* current->io_usage */);	/* %% */
 	ac.ac_rw = encode_comp_t(ac.ac_io / 1024);
 	ac.ac_swaps = encode_comp_t(0);