aboutsummaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorGreg Kroah-Hartman <gregkh@suse.de>2010-01-26 18:04:02 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2010-01-26 20:25:38 -0500
commitb04da8bfdfbbd79544cab2fadfdc12e87eb01600 (patch)
treef45ce22866beb7d931b2b19ef2c08b8e03fd6d17 /fs
parent9a3cbe3265c7714e8ee423feb6e27a080af79608 (diff)
fnctl: f_modown should call write_lock_irqsave/restore
Commit 703625118069f9f8960d356676662d3db5a9d116 exposed that f_modown() should call write_lock_irqsave instead of just write_lock_irq so that because a caller could have a spinlock held and it would not be good to renable interrupts. Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Tavis Ormandy <taviso@google.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/fcntl.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 97e01dc0d95f..5ef953e6f908 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -199,7 +199,9 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
199static void f_modown(struct file *filp, struct pid *pid, enum pid_type type, 199static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
200 int force) 200 int force)
201{ 201{
202 write_lock_irq(&filp->f_owner.lock); 202 unsigned long flags;
203
204 write_lock_irqsave(&filp->f_owner.lock, flags);
203 if (force || !filp->f_owner.pid) { 205 if (force || !filp->f_owner.pid) {
204 put_pid(filp->f_owner.pid); 206 put_pid(filp->f_owner.pid);
205 filp->f_owner.pid = get_pid(pid); 207 filp->f_owner.pid = get_pid(pid);
@@ -211,7 +213,7 @@ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
211 filp->f_owner.euid = cred->euid; 213 filp->f_owner.euid = cred->euid;
212 } 214 }
213 } 215 }
214 write_unlock_irq(&filp->f_owner.lock); 216 write_unlock_irqrestore(&filp->f_owner.lock, flags);
215} 217}
216 218
217int __f_setown(struct file *filp, struct pid *pid, enum pid_type type, 219int __f_setown(struct file *filp, struct pid *pid, enum pid_type type,