From 4ef9b4f1a76ea2370fbfe20e80fef141ab92b65e Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 7 Jul 2020 18:08:46 -0500 Subject: smb3: fix access denied on change notify request to some servers read permission, not just read attributes permission, is required on the directory. See MS-SMB2 (protocol specification) section 3.3.5.19. Signed-off-by: Steve French CC: Stable # v5.6+ Reviewed-by: Pavel Shilovsky --- fs/cifs/smb2ops.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index d9fdafa5eb60..32f90dc82c84 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -2148,7 +2148,7 @@ smb3_notify(const unsigned int xid, struct file *pfile, tcon = cifs_sb_master_tcon(cifs_sb); oparms.tcon = tcon; - oparms.desired_access = FILE_READ_ATTRIBUTES; + oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA; oparms.disposition = FILE_OPEN; oparms.create_options = cifs_create_options(cifs_sb, 0); oparms.fid = &fid; -- cgit v1.2.3-58-ga151 From 2e98c01846b2ce96cc41f60b70fd03cd47d3ac77 Mon Sep 17 00:00:00 2001 From: yangerkun Date: Thu, 2 Jul 2020 15:25:26 +0800 Subject: cifs: remove the retry in cifs_poxis_lock_set The caller of cifs_posix_lock_set will do retry(like fcntl_setlk64->do_lock_file_wait) if we will wait for any file_lock. So the retry in cifs_poxis_lock_set seems duplicated, remove it to make a cleanup. Signed-off-by: yangerkun Signed-off-by: Steve French Reviewed-by: NeilBrown --- fs/cifs/file.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) (limited to 'fs') diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 9b0f8f33f832..be46fab4c96d 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1149,20 +1149,20 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock) /* * Set the byte-range lock (posix style). Returns: - * 1) 0, if we set the lock and don't need to request to the server; - * 2) 1, if we need to request to the server; - * 3) <0, if the error occurs while setting the lock. + * 1) <0, if the error occurs while setting the lock; + * 2) 0, if we set the lock and don't need to request to the server; + * 3) FILE_LOCK_DEFERRED, if we will wait for some other file_lock; + * 4) FILE_LOCK_DEFERRED + 1, if we need to request to the server. */ static int cifs_posix_lock_set(struct file *file, struct file_lock *flock) { struct cifsInodeInfo *cinode = CIFS_I(file_inode(file)); - int rc = 1; + int rc = FILE_LOCK_DEFERRED + 1; if ((flock->fl_flags & FL_POSIX) == 0) return rc; -try_again: cifs_down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { up_write(&cinode->lock_sem); @@ -1171,13 +1171,6 @@ try_again: rc = posix_lock_file(file, flock, NULL); up_write(&cinode->lock_sem); - if (rc == FILE_LOCK_DEFERRED) { - rc = wait_event_interruptible(flock->fl_wait, - list_empty(&flock->fl_blocked_member)); - if (!rc) - goto try_again; - locks_delete_block(flock); - } return rc; } @@ -1652,7 +1645,7 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, int posix_lock_type; rc = cifs_posix_lock_set(file, flock); - if (!rc || rc < 0) + if (rc <= FILE_LOCK_DEFERRED) return rc; if (type & server->vals->shared_lock_type) -- cgit v1.2.3-58-ga151 From 8668115cf2db40e22e7be02652a3673d8d30c9f0 Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 7 Jul 2020 23:43:39 -0500 Subject: smb3: fix unneeded error message on change notify We should not be logging a warning repeatedly on change notify. CC: Stable # v5.6+ Signed-off-by: Steve French Reviewed-by: Ronnie Sahlberg --- fs/cifs/smb2misc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index 6a39451973f8..157992864ce7 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -354,9 +354,13 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_sync_hdr *shdr) ((struct smb2_ioctl_rsp *)shdr)->OutputCount); break; case SMB2_CHANGE_NOTIFY: + *off = le16_to_cpu( + ((struct smb2_change_notify_rsp *)shdr)->OutputBufferOffset); + *len = le32_to_cpu( + ((struct smb2_change_notify_rsp *)shdr)->OutputBufferLength); + break; default: - /* BB FIXME for unimplemented cases above */ - cifs_dbg(VFS, "no length check for command\n"); + cifs_dbg(VFS, "no length check for command %d\n", le16_to_cpu(shdr->Command)); break; } -- cgit v1.2.3-58-ga151 From a77592a70081edb58a95b9da18fd5a2882a25666 Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Thu, 9 Jul 2020 20:39:49 +1000 Subject: cifs: fix reference leak for tlink Don't leak a reference to tlink during the NOTIFY ioctl Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Reviewed-by: Aurelien Aptel CC: Stable # v5.6+ --- fs/cifs/ioctl.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 4a73e63c4d43..dcde44ff6cf9 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -169,6 +169,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) unsigned int xid; struct cifsFileInfo *pSMBFile = filep->private_data; struct cifs_tcon *tcon; + struct tcon_link *tlink; struct cifs_sb_info *cifs_sb; __u64 ExtAttrBits = 0; __u64 caps; @@ -307,13 +308,19 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) break; } cifs_sb = CIFS_SB(inode->i_sb); - tcon = tlink_tcon(cifs_sb_tlink(cifs_sb)); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + break; + } + tcon = tlink_tcon(tlink); if (tcon && tcon->ses->server->ops->notify) { rc = tcon->ses->server->ops->notify(xid, filep, (void __user *)arg); cifs_dbg(FYI, "ioctl notify rc %d\n", rc); } else rc = -EOPNOTSUPP; + cifs_put_tlink(tlink); break; default: cifs_dbg(FYI, "unsupported ioctl\n"); -- cgit v1.2.3-58-ga151 From a8dab63ea623610bb258d93649e30330dd1b7c8b Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 7 Jul 2020 23:52:07 -0500 Subject: cifs: update internal module version number To 2.28 Signed-off-by: Steve French --- fs/cifs/cifsfs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index c7a311d28d3d..99b3180c613a 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -156,5 +156,5 @@ extern int cifs_truncate_page(struct address_space *mapping, loff_t from); extern const struct export_operations cifs_export_ops; #endif /* CONFIG_CIFS_NFSD_EXPORT */ -#define CIFS_VERSION "2.27" +#define CIFS_VERSION "2.28" #endif /* _CIFSFS_H */ -- cgit v1.2.3-58-ga151