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-rw-r--r--fs/smb/client/cifs_spnego.c47
-rw-r--r--fs/smb/client/cifsfs.h4
-rw-r--r--fs/smb/client/cifsglob.h21
-rw-r--r--fs/smb/client/cifstransport.c19
-rw-r--r--fs/smb/client/compress.c71
-rw-r--r--fs/smb/client/connect.c9
-rw-r--r--fs/smb/client/inode.c34
-rw-r--r--fs/smb/client/smb2ops.c15
-rw-r--r--fs/smb/client/smb2transport.c1
-rw-r--r--fs/smb/client/smbdirect.c10
-rw-r--r--fs/smb/client/transport.c7
11 files changed, 128 insertions, 110 deletions
diff --git a/fs/smb/client/cifs_spnego.c b/fs/smb/client/cifs_spnego.c
index bc1c1e9b288a..43b86fa4d695 100644
--- a/fs/smb/client/cifs_spnego.c
+++ b/fs/smb/client/cifs_spnego.c
@@ -124,55 +124,44 @@ cifs_get_spnego_key(struct cifs_ses *sesInfo,
dp = description;
/* start with version and hostname portion of UNC string */
spnego_key = ERR_PTR(-EINVAL);
- sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
- hostname);
- dp = description + strlen(description);
+ dp += sprintf(dp, "ver=0x%x;host=%s;", CIFS_SPNEGO_UPCALL_VERSION,
+ hostname);
/* add the server address */
if (server->dstaddr.ss_family == AF_INET)
- sprintf(dp, "ip4=%pI4", &sa->sin_addr);
+ dp += sprintf(dp, "ip4=%pI4", &sa->sin_addr);
else if (server->dstaddr.ss_family == AF_INET6)
- sprintf(dp, "ip6=%pI6", &sa6->sin6_addr);
+ dp += sprintf(dp, "ip6=%pI6", &sa6->sin6_addr);
else
goto out;
- dp = description + strlen(description);
-
/* for now, only sec=krb5 and sec=mskrb5 and iakerb are valid */
if (server->sec_kerberos)
- sprintf(dp, ";sec=krb5");
+ dp += sprintf(dp, ";sec=krb5");
else if (server->sec_mskerberos)
- sprintf(dp, ";sec=mskrb5");
+ dp += sprintf(dp, ";sec=mskrb5");
else if (server->sec_iakerb)
- sprintf(dp, ";sec=iakerb");
+ dp += sprintf(dp, ";sec=iakerb");
else {
cifs_dbg(VFS, "unknown or missing server auth type, use krb5\n");
- sprintf(dp, ";sec=krb5");
+ dp += sprintf(dp, ";sec=krb5");
}
- dp = description + strlen(description);
- sprintf(dp, ";uid=0x%x",
- from_kuid_munged(&init_user_ns, sesInfo->linux_uid));
+ dp += sprintf(dp, ";uid=0x%x",
+ from_kuid_munged(&init_user_ns, sesInfo->linux_uid));
- dp = description + strlen(description);
- sprintf(dp, ";creduid=0x%x",
+ dp += sprintf(dp, ";creduid=0x%x",
from_kuid_munged(&init_user_ns, sesInfo->cred_uid));
- if (sesInfo->user_name) {
- dp = description + strlen(description);
- sprintf(dp, ";user=%s", sesInfo->user_name);
- }
+ if (sesInfo->user_name)
+ dp += sprintf(dp, ";user=%s", sesInfo->user_name);
- dp = description + strlen(description);
- sprintf(dp, ";pid=0x%x", current->pid);
+ dp += sprintf(dp, ";pid=0x%x", current->pid);
- if (sesInfo->upcall_target == UPTARGET_MOUNT) {
- dp = description + strlen(description);
- sprintf(dp, ";upcall_target=mount");
- } else {
- dp = description + strlen(description);
- sprintf(dp, ";upcall_target=app");
- }
+ if (sesInfo->upcall_target == UPTARGET_MOUNT)
+ dp += sprintf(dp, ";upcall_target=mount");
+ else
+ dp += sprintf(dp, ";upcall_target=app");
cifs_dbg(FYI, "key description = %s\n", description);
saved_cred = override_creds(spnego_cred);
diff --git a/fs/smb/client/cifsfs.h b/fs/smb/client/cifsfs.h
index 487f39cff77e..3ce7c614ccc0 100644
--- a/fs/smb/client/cifsfs.h
+++ b/fs/smb/client/cifsfs.h
@@ -145,6 +145,6 @@ extern const struct export_operations cifs_export_ops;
#endif /* CONFIG_CIFS_NFSD_EXPORT */
/* when changing internal version - update following two lines at same time */
-#define SMB3_PRODUCT_BUILD 55
-#define CIFS_VERSION "2.55"
+#define SMB3_PRODUCT_BUILD 56
+#define CIFS_VERSION "2.56"
#endif /* _CIFSFS_H */
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h
index e6830ab3a546..1e64a4fb6af0 100644
--- a/fs/smb/client/cifsglob.h
+++ b/fs/smb/client/cifsglob.h
@@ -1732,6 +1732,7 @@ struct mid_q_entry {
int mid_rc; /* rc for MID_RC */
__le16 command; /* smb command code */
unsigned int optype; /* operation type */
+ spinlock_t mid_lock;
bool wait_cancelled:1; /* Cancelled while waiting for response */
bool deleted_from_q:1; /* Whether Mid has been dequeued frem pending_mid_q */
bool large_buf:1; /* if valid response, is pointer to large buf */
@@ -2036,6 +2037,9 @@ require use of the stronger protocol */
* cifsFileInfo->file_info_lock cifsFileInfo->count cifs_new_fileinfo
* ->invalidHandle initiate_cifs_search
* ->oplock_break_cancelled
+ * mid_q_entry->mid_lock mid_q_entry->callback alloc_mid
+ * smb2_mid_entry_alloc
+ * (Any fields of mid_q_entry that will need protection)
****************************************************************************/
#ifdef DECLARE_GLOBALS_HERE
@@ -2375,6 +2379,23 @@ static inline bool cifs_netbios_name(const char *name, size_t namelen)
return ret;
}
+/*
+ * Execute mid callback atomically - ensures callback runs exactly once
+ * and prevents sleeping in atomic context.
+ */
+static inline void mid_execute_callback(struct mid_q_entry *mid)
+{
+ void (*callback)(struct mid_q_entry *mid);
+
+ spin_lock(&mid->mid_lock);
+ callback = mid->callback;
+ mid->callback = NULL; /* Mark as executed, */
+ spin_unlock(&mid->mid_lock);
+
+ if (callback)
+ callback(mid);
+}
+
#define CIFS_REPARSE_SUPPORT(tcon) \
((tcon)->posix_extensions || \
(le32_to_cpu((tcon)->fsAttrInfo.Attributes) & \
diff --git a/fs/smb/client/cifstransport.c b/fs/smb/client/cifstransport.c
index 352dafb888dd..e98b95eff8c9 100644
--- a/fs/smb/client/cifstransport.c
+++ b/fs/smb/client/cifstransport.c
@@ -46,6 +46,7 @@ alloc_mid(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
memset(temp, 0, sizeof(struct mid_q_entry));
kref_init(&temp->refcount);
+ spin_lock_init(&temp->mid_lock);
temp->mid = get_mid(smb_buffer);
temp->pid = current->pid;
temp->command = cpu_to_le16(smb_buffer->Command);
@@ -345,16 +346,15 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
rc = wait_for_response(server, midQ);
if (rc != 0) {
send_cancel(server, &rqst, midQ);
- spin_lock(&server->mid_queue_lock);
- if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
- midQ->mid_state == MID_RESPONSE_RECEIVED) {
+ spin_lock(&midQ->mid_lock);
+ if (midQ->callback) {
/* no longer considered to be "in-flight" */
midQ->callback = release_mid;
- spin_unlock(&server->mid_queue_lock);
+ spin_unlock(&midQ->mid_lock);
add_credits(server, &credits, 0);
return rc;
}
- spin_unlock(&server->mid_queue_lock);
+ spin_unlock(&midQ->mid_lock);
}
rc = cifs_sync_mid_result(midQ, server);
@@ -527,15 +527,14 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
rc = wait_for_response(server, midQ);
if (rc) {
send_cancel(server, &rqst, midQ);
- spin_lock(&server->mid_queue_lock);
- if (midQ->mid_state == MID_REQUEST_SUBMITTED ||
- midQ->mid_state == MID_RESPONSE_RECEIVED) {
+ spin_lock(&midQ->mid_lock);
+ if (midQ->callback) {
/* no longer considered to be "in-flight" */
midQ->callback = release_mid;
- spin_unlock(&server->mid_queue_lock);
+ spin_unlock(&midQ->mid_lock);
return rc;
}
- spin_unlock(&server->mid_queue_lock);
+ spin_unlock(&midQ->mid_lock);
}
/* We got the response - restart system call. */
diff --git a/fs/smb/client/compress.c b/fs/smb/client/compress.c
index 766b4de13da7..db709f5cd2e1 100644
--- a/fs/smb/client/compress.c
+++ b/fs/smb/client/compress.c
@@ -155,58 +155,29 @@ static int cmp_bkt(const void *_a, const void *_b)
}
/*
- * TODO:
- * Support other iter types, if required.
- * Only ITER_XARRAY is supported for now.
+ * Collect some 2K samples with 2K gaps between.
*/
-static int collect_sample(const struct iov_iter *iter, ssize_t max, u8 *sample)
+static int collect_sample(const struct iov_iter *source, ssize_t max, u8 *sample)
{
- struct folio *folios[16], *folio;
- unsigned int nr, i, j, npages;
- loff_t start = iter->xarray_start + iter->iov_offset;
- pgoff_t last, index = start / PAGE_SIZE;
- size_t len, off, foff;
- void *p;
- int s = 0;
-
- last = (start + max - 1) / PAGE_SIZE;
- do {
- nr = xa_extract(iter->xarray, (void **)folios, index, last, ARRAY_SIZE(folios),
- XA_PRESENT);
- if (nr == 0)
- return -EIO;
-
- for (i = 0; i < nr; i++) {
- folio = folios[i];
- npages = folio_nr_pages(folio);
- foff = start - folio_pos(folio);
- off = foff % PAGE_SIZE;
-
- for (j = foff / PAGE_SIZE; j < npages; j++) {
- size_t len2;
-
- len = min_t(size_t, max, PAGE_SIZE - off);
- len2 = min_t(size_t, len, SZ_2K);
-
- p = kmap_local_page(folio_page(folio, j));
- memcpy(&sample[s], p, len2);
- kunmap_local(p);
-
- s += len2;
-
- if (len2 < SZ_2K || s >= max - SZ_2K)
- return s;
-
- max -= len;
- if (max <= 0)
- return s;
-
- start += len;
- off = 0;
- index++;
- }
- }
- } while (nr == ARRAY_SIZE(folios));
+ struct iov_iter iter = *source;
+ size_t s = 0;
+
+ while (iov_iter_count(&iter) >= SZ_2K) {
+ size_t part = umin(umin(iov_iter_count(&iter), SZ_2K), max);
+ size_t n;
+
+ n = copy_from_iter(sample + s, part, &iter);
+ if (n != part)
+ return -EFAULT;
+
+ s += n;
+ max -= n;
+
+ if (iov_iter_count(&iter) < PAGE_SIZE - SZ_2K)
+ break;
+
+ iov_iter_advance(&iter, SZ_2K);
+ }
return s;
}
diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 587845a2452d..dd12f3eb61dc 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -335,7 +335,7 @@ cifs_abort_connection(struct TCP_Server_Info *server)
cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
list_for_each_entry_safe(mid, nmid, &retry_list, qhead) {
list_del_init(&mid->qhead);
- mid->callback(mid);
+ mid_execute_callback(mid);
release_mid(mid);
}
@@ -919,7 +919,7 @@ is_smb_response(struct TCP_Server_Info *server, unsigned char type)
list_del_init(&mid->qhead);
mid->mid_rc = mid_rc;
mid->mid_state = MID_RC;
- mid->callback(mid);
+ mid_execute_callback(mid);
release_mid(mid);
}
@@ -1117,7 +1117,7 @@ clean_demultiplex_info(struct TCP_Server_Info *server)
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
cifs_dbg(FYI, "Callback mid %llu\n", mid_entry->mid);
list_del_init(&mid_entry->qhead);
- mid_entry->callback(mid_entry);
+ mid_execute_callback(mid_entry);
release_mid(mid_entry);
}
/* 1/8th of sec is more than enough time for them to exit */
@@ -1394,7 +1394,7 @@ next_pdu:
}
if (!mids[i]->multiRsp || mids[i]->multiEnd)
- mids[i]->callback(mids[i]);
+ mid_execute_callback(mids[i]);
release_mid(mids[i]);
} else if (server->ops->is_oplock_break &&
@@ -4205,7 +4205,6 @@ retry:
return 0;
}
- server->lstrp = jiffies;
server->tcpStatus = CifsInNegotiate;
server->neg_start = jiffies;
spin_unlock(&server->srv_lock);
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index 75be4b46bc6f..fe453a4b3dc8 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -1943,15 +1943,24 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry)
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
struct tcon_link *tlink;
struct cifs_tcon *tcon;
+ __u32 dosattr = 0, origattr = 0;
struct TCP_Server_Info *server;
struct iattr *attrs = NULL;
- __u32 dosattr = 0, origattr = 0;
+ bool rehash = false;
cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry);
if (unlikely(cifs_forced_shutdown(cifs_sb)))
return -EIO;
+ /* Unhash dentry in advance to prevent any concurrent opens */
+ spin_lock(&dentry->d_lock);
+ if (!d_unhashed(dentry)) {
+ __d_drop(dentry);
+ rehash = true;
+ }
+ spin_unlock(&dentry->d_lock);
+
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
@@ -2003,7 +2012,8 @@ psx_del_no_retry:
cifs_drop_nlink(inode);
}
} else if (rc == -ENOENT) {
- d_drop(dentry);
+ if (simple_positive(dentry))
+ d_delete(dentry);
} else if (rc == -EBUSY) {
if (server->ops->rename_pending_delete) {
rc = server->ops->rename_pending_delete(full_path,
@@ -2056,6 +2066,8 @@ unlink_out:
kfree(attrs);
free_xid(xid);
cifs_put_tlink(tlink);
+ if (rehash)
+ d_rehash(dentry);
return rc;
}
@@ -2462,6 +2474,7 @@ cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
struct cifs_sb_info *cifs_sb;
struct tcon_link *tlink;
struct cifs_tcon *tcon;
+ bool rehash = false;
unsigned int xid;
int rc, tmprc;
int retry_count = 0;
@@ -2477,6 +2490,17 @@ cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
if (unlikely(cifs_forced_shutdown(cifs_sb)))
return -EIO;
+ /*
+ * Prevent any concurrent opens on the target by unhashing the dentry.
+ * VFS already unhashes the target when renaming directories.
+ */
+ if (d_is_positive(target_dentry) && !d_is_dir(target_dentry)) {
+ if (!d_unhashed(target_dentry)) {
+ d_drop(target_dentry);
+ rehash = true;
+ }
+ }
+
tlink = cifs_sb_tlink(cifs_sb);
if (IS_ERR(tlink))
return PTR_ERR(tlink);
@@ -2518,6 +2542,8 @@ cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir,
}
}
+ if (!rc)
+ rehash = false;
/*
* No-replace is the natural behavior for CIFS, so skip unlink hacks.
*/
@@ -2576,12 +2602,16 @@ unlink_target:
goto cifs_rename_exit;
rc = cifs_do_rename(xid, source_dentry, from_name,
target_dentry, to_name);
+ if (!rc)
+ rehash = false;
}
/* force revalidate to go get info when needed */
CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0;
cifs_rename_exit:
+ if (rehash)
+ d_rehash(target_dentry);
kfree(info_buf_source);
free_dentry_path(page2);
free_dentry_path(page1);
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c
index ad8947434b71..3b251de874ec 100644
--- a/fs/smb/client/smb2ops.c
+++ b/fs/smb/client/smb2ops.c
@@ -772,6 +772,13 @@ next_iface:
bytes_left -= sizeof(*p);
break;
}
+ /* Validate that Next doesn't point beyond the buffer */
+ if (next > bytes_left) {
+ cifs_dbg(VFS, "%s: invalid Next pointer %zu > %zd\n",
+ __func__, next, bytes_left);
+ rc = -EINVAL;
+ goto out;
+ }
p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
bytes_left -= next;
}
@@ -783,7 +790,9 @@ next_iface:
}
/* Azure rounds the buffer size up 8, to a 16 byte boundary */
- if ((bytes_left > 8) || p->Next)
+ if ((bytes_left > 8) ||
+ (bytes_left >= offsetof(struct network_interface_info_ioctl_rsp, Next)
+ + sizeof(p->Next) && p->Next))
cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
ses->iface_last_update = jiffies;
@@ -4805,7 +4814,7 @@ static void smb2_decrypt_offload(struct work_struct *work)
dw->server->ops->is_network_name_deleted(dw->buf,
dw->server);
- mid->callback(mid);
+ mid_execute_callback(mid);
} else {
spin_lock(&dw->server->srv_lock);
if (dw->server->tcpStatus == CifsNeedReconnect) {
@@ -4813,7 +4822,7 @@ static void smb2_decrypt_offload(struct work_struct *work)
mid->mid_state = MID_RETRY_NEEDED;
spin_unlock(&dw->server->mid_queue_lock);
spin_unlock(&dw->server->srv_lock);
- mid->callback(mid);
+ mid_execute_callback(mid);
} else {
spin_lock(&dw->server->mid_queue_lock);
mid->mid_state = MID_REQUEST_SUBMITTED;
diff --git a/fs/smb/client/smb2transport.c b/fs/smb/client/smb2transport.c
index ff9ef7fcd010..bc0e92eb2b64 100644
--- a/fs/smb/client/smb2transport.c
+++ b/fs/smb/client/smb2transport.c
@@ -771,6 +771,7 @@ smb2_mid_entry_alloc(const struct smb2_hdr *shdr,
temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
memset(temp, 0, sizeof(struct mid_q_entry));
kref_init(&temp->refcount);
+ spin_lock_init(&temp->mid_lock);
temp->mid = le64_to_cpu(shdr->MessageId);
temp->credits = credits > 0 ? credits : 1;
temp->pid = current->pid;
diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c
index c628e91c328b..02d6db431fd4 100644
--- a/fs/smb/client/smbdirect.c
+++ b/fs/smb/client/smbdirect.c
@@ -1337,10 +1337,6 @@ void smbd_destroy(struct TCP_Server_Info *server)
log_rdma_event(INFO, "cancelling idle timer\n");
cancel_delayed_work_sync(&info->idle_timer_work);
- log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
- wait_event(info->wait_send_pending,
- atomic_read(&info->send_pending) == 0);
-
/* It's not possible for upper layer to get to reassembly */
log_rdma_event(INFO, "drain the reassembly queue\n");
do {
@@ -1986,7 +1982,11 @@ int smbd_send(struct TCP_Server_Info *server,
*/
wait_event(info->wait_send_pending,
- atomic_read(&info->send_pending) == 0);
+ atomic_read(&info->send_pending) == 0 ||
+ sc->status != SMBDIRECT_SOCKET_CONNECTED);
+
+ if (sc->status != SMBDIRECT_SOCKET_CONNECTED && rc == 0)
+ rc = -EAGAIN;
return rc;
}
diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c
index 32d528b4dd83..a61ba7f3fb86 100644
--- a/fs/smb/client/transport.c
+++ b/fs/smb/client/transport.c
@@ -1005,15 +1005,14 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
cifs_server_dbg(FYI, "Cancelling wait for mid %llu cmd: %d\n",
midQ[i]->mid, le16_to_cpu(midQ[i]->command));
send_cancel(server, &rqst[i], midQ[i]);
- spin_lock(&server->mid_queue_lock);
+ spin_lock(&midQ[i]->mid_lock);
midQ[i]->wait_cancelled = true;
- if (midQ[i]->mid_state == MID_REQUEST_SUBMITTED ||
- midQ[i]->mid_state == MID_RESPONSE_RECEIVED) {
+ if (midQ[i]->callback) {
midQ[i]->callback = cifs_cancelled_callback;
cancelled_mid[i] = true;
credits[i].value = 0;
}
- spin_unlock(&server->mid_queue_lock);
+ spin_unlock(&midQ[i]->mid_lock);
}
}
generated by cgit (git 2.34.1) at 2025-08-16 11:26:00 +0000