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lockd: fix file selection in nlmsvc_cancel_blocked

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[ Upstream commit 9f27783b4d ]

We currently do a lock_to_openmode call based on the arguments from the
NLM_UNLOCK call, but that will always set the fl_type of the lock to
F_UNLCK, and the O_RDONLY descriptor is always chosen.

Fix it to use the file_lock from the block instead.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeff Layton 2022-11-11 14:36:38 -05:00 committed by Greg Kroah-Hartman
parent ccbf6efab8
commit 0920deeec6
1 changed files with 4 additions and 3 deletions
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7
fs/lockd/svclock.c
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@ -699,9 +699,10 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l
block = nlmsvc_lookup_block(file, lock);
mutex_unlock(&file->f_mutex);
if (block != NULL) {
mode = lock_to_openmode(&lock->fl);
vfs_cancel_lock(block->b_file->f_file[mode],
&block->b_call->a_args.lock.fl);
struct file_lock *fl = &block->b_call->a_args.lock.fl;
mode = lock_to_openmode(fl);
vfs_cancel_lock(block->b_file->f_file[mode], fl);
status = nlmsvc_unlink_block(block);
nlmsvc_release_block(block);
}