From ef22bb800d967616c7638d204bc1b425beac7f5f Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 25 Nov 2023 23:55:10 -0300 Subject: smb: client: fix missing mode bits for SMB symlinks When instantiating inodes for SMB symlinks, add the mode bits from @cifs_sb->ctx->file_mode as we already do for the other special files. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) Signed-off-by: Steve French --- fs/smb/client/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index 47f49be69ced..42ef8ca446d0 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -790,7 +790,7 @@ bool cifs_reparse_point_to_fattr(struct cifs_sb_info *cifs_sb, case 0: /* SMB1 symlink */ case IO_REPARSE_TAG_SYMLINK: case IO_REPARSE_TAG_NFS: - fattr->cf_mode = S_IFLNK; + fattr->cf_mode = S_IFLNK | cifs_sb->ctx->file_mode; fattr->cf_dtype = DT_LNK; break; default: -- cgit v1.2.3 From 9d63509547a940225d06d7eba1dc412befae255d Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Tue, 28 Nov 2023 16:37:19 -0300 Subject: smb: client: report correct st_size for SMB and NFS symlinks We can't rely on FILE_STANDARD_INFORMATION::EndOfFile for reparse points as they will be always zero. Set it to symlink target's length as specified by POSIX. This will make stat() family of syscalls return the correct st_size for such files. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) Signed-off-by: Steve French --- fs/smb/client/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index 42ef8ca446d0..09c5c0f5c96e 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -865,6 +865,8 @@ static void cifs_open_info_to_fattr(struct cifs_fattr *fattr, out_reparse: if (S_ISLNK(fattr->cf_mode)) { + if (likely(data->symlink_target)) + fattr->cf_eof = strnlen(data->symlink_target, PATH_MAX); fattr->cf_symlink_target = data->symlink_target; data->symlink_target = NULL; } -- cgit v1.2.3 From 83d5518b124dfd605f10a68128482c839a239f9d Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 29 Nov 2023 16:56:17 +0000 Subject: cifs: Fix FALLOC_FL_ZERO_RANGE by setting i_size if EOF moved Fix the cifs filesystem implementations of FALLOC_FL_ZERO_RANGE, in smb3_zero_range(), to set i_size after extending the file on the server. Fixes: 72c419d9b073 ("cifs: fix smb3_zero_range so it can expand the file-size when required") Cc: stable@vger.kernel.org Signed-off-by: David Howells Acked-by: Paulo Alcantara cc: Shyam Prasad N cc: Rohith Surabattula cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: linux-mm@kvack.org Signed-off-by: Steve French --- fs/smb/client/smb2ops.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 82ab62fd0040..f1b0b2b11ab2 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -3311,6 +3311,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, struct inode *inode = file_inode(file); struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifsFileInfo *cfile = file->private_data; + unsigned long long new_size; long rc; unsigned int xid; __le64 eof; @@ -3341,10 +3342,15 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, /* * do we also need to change the size of the file? */ - if (keep_size == false && i_size_read(inode) < offset + len) { - eof = cpu_to_le64(offset + len); + new_size = offset + len; + if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { + eof = cpu_to_le64(new_size); rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, &eof); + if (rc >= 0) { + truncate_setsize(inode, new_size); + fscache_resize_cookie(cifs_inode_cookie(inode), new_size); + } } zero_range_exit: -- cgit v1.2.3 From 88010155f02b2c3b03c71609ba6ceeb457ece095 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 29 Nov 2023 16:56:18 +0000 Subject: cifs: Fix FALLOC_FL_INSERT_RANGE by setting i_size after EOF moved Fix the cifs filesystem implementations of FALLOC_FL_INSERT_RANGE, in smb3_insert_range(), to set i_size after extending the file on the server and before we do the copy to open the gap (as we don't clean up the EOF marker if the copy fails). Fixes: 7fe6fe95b936 ("cifs: add FALLOC_FL_INSERT_RANGE support") Cc: stable@vger.kernel.org Signed-off-by: David Howells Acked-by: Paulo Alcantara cc: Shyam Prasad N cc: Rohith Surabattula cc: Jeff Layton cc: linux-cifs@vger.kernel.org cc: linux-mm@kvack.org Signed-off-by: Steve French --- fs/smb/client/smb2ops.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index f1b0b2b11ab2..45931115f475 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -3745,6 +3745,9 @@ static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, if (rc < 0) goto out_2; + truncate_setsize(inode, old_eof + len); + fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); + rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); if (rc < 0) goto out_2; -- cgit v1.2.3 From 0015eb6e12384ff1c589928e84deac2ad1ceb236 Mon Sep 17 00:00:00 2001 From: Dmitry Antipov Date: Tue, 28 Nov 2023 13:53:47 +0300 Subject: smb: client, common: fix fortify warnings When compiling with gcc version 14.0.0 20231126 (experimental) and CONFIG_FORTIFY_SOURCE=y, I've noticed the following: In file included from ./include/linux/string.h:295, from ./include/linux/bitmap.h:12, from ./include/linux/cpumask.h:12, from ./arch/x86/include/asm/paravirt.h:17, from ./arch/x86/include/asm/cpuid.h:62, from ./arch/x86/include/asm/processor.h:19, from ./arch/x86/include/asm/cpufeature.h:5, from ./arch/x86/include/asm/thread_info.h:53, from ./include/linux/thread_info.h:60, from ./arch/x86/include/asm/preempt.h:9, from ./include/linux/preempt.h:79, from ./include/linux/spinlock.h:56, from ./include/linux/wait.h:9, from ./include/linux/wait_bit.h:8, from ./include/linux/fs.h:6, from fs/smb/client/smb2pdu.c:18: In function 'fortify_memcpy_chk', inlined from '__SMB2_close' at fs/smb/client/smb2pdu.c:3480:4: ./include/linux/fortify-string.h:588:25: warning: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning] 588 | __read_overflow2_field(q_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ and: In file included from ./include/linux/string.h:295, from ./include/linux/bitmap.h:12, from ./include/linux/cpumask.h:12, from ./arch/x86/include/asm/paravirt.h:17, from ./arch/x86/include/asm/cpuid.h:62, from ./arch/x86/include/asm/processor.h:19, from ./arch/x86/include/asm/cpufeature.h:5, from ./arch/x86/include/asm/thread_info.h:53, from ./include/linux/thread_info.h:60, from ./arch/x86/include/asm/preempt.h:9, from ./include/linux/preempt.h:79, from ./include/linux/spinlock.h:56, from ./include/linux/wait.h:9, from ./include/linux/wait_bit.h:8, from ./include/linux/fs.h:6, from fs/smb/client/cifssmb.c:17: In function 'fortify_memcpy_chk', inlined from 'CIFS_open' at fs/smb/client/cifssmb.c:1248:3: ./include/linux/fortify-string.h:588:25: warning: call to '__read_overflow2_field' declared with attribute warning: detected read beyond size of field (2nd parameter); maybe use struct_group()? [-Wattribute-warning] 588 | __read_overflow2_field(q_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In both cases, the fortification logic inteprets calls to 'memcpy()' as an attempts to copy an amount of data which exceeds the size of the specified field (i.e. more than 8 bytes from __le64 value) and thus issues an overread warning. Both of these warnings may be silenced by using the convenient 'struct_group()' quirk. Signed-off-by: Dmitry Antipov Acked-by: Namjae Jeon Signed-off-by: Steve French --- fs/smb/client/cifspdu.h | 24 ++++++++++++++---------- fs/smb/client/cifssmb.c | 6 ++++-- fs/smb/client/smb2pdu.c | 8 +++----- fs/smb/client/smb2pdu.h | 16 +++++++++------- fs/smb/common/smb2pdu.h | 17 ++++++++++------- 5 files changed, 40 insertions(+), 31 deletions(-) diff --git a/fs/smb/client/cifspdu.h b/fs/smb/client/cifspdu.h index 83ccc51a54d0..c0513fbb8a59 100644 --- a/fs/smb/client/cifspdu.h +++ b/fs/smb/client/cifspdu.h @@ -882,11 +882,13 @@ typedef struct smb_com_open_rsp { __u8 OplockLevel; __u16 Fid; __le32 CreateAction; - __le64 CreationTime; - __le64 LastAccessTime; - __le64 LastWriteTime; - __le64 ChangeTime; - __le32 FileAttributes; + struct_group(common_attributes, + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + __le32 FileAttributes; + ); __le64 AllocationSize; __le64 EndOfFile; __le16 FileType; @@ -2264,11 +2266,13 @@ typedef struct { /* QueryFileInfo/QueryPathinfo (also for SetPath/SetFile) data buffer formats */ /******************************************************************************/ typedef struct { /* data block encoding of response to level 263 QPathInfo */ - __le64 CreationTime; - __le64 LastAccessTime; - __le64 LastWriteTime; - __le64 ChangeTime; - __le32 Attributes; + struct_group(common_attributes, + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + __le32 Attributes; + ); __u32 Pad1; __le64 AllocationSize; __le64 EndOfFile; /* size ie offset to first free byte in file */ diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index bad91ba6c3a9..9ee348e6d106 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -1244,8 +1244,10 @@ openRetry: *oplock |= CIFS_CREATE_ACTION; if (buf) { - /* copy from CreationTime to Attributes */ - memcpy((char *)buf, (char *)&rsp->CreationTime, 36); + /* copy commonly used attributes */ + memcpy(&buf->common_attributes, + &rsp->common_attributes, + sizeof(buf->common_attributes)); /* the file_info buf is endian converted by caller */ buf->AllocationSize = rsp->AllocationSize; buf->EndOfFile = rsp->EndOfFile; diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c index 2eb29fa278c3..395e1230ddbc 100644 --- a/fs/smb/client/smb2pdu.c +++ b/fs/smb/client/smb2pdu.c @@ -3472,12 +3472,10 @@ __SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, } else { trace_smb3_close_done(xid, persistent_fid, tcon->tid, ses->Suid); - /* - * Note that have to subtract 4 since struct network_open_info - * has a final 4 byte pad that close response does not have - */ if (pbuf) - memcpy(pbuf, (char *)&rsp->CreationTime, sizeof(*pbuf) - 4); + memcpy(&pbuf->network_open_info, + &rsp->network_open_info, + sizeof(pbuf->network_open_info)); } atomic_dec(&tcon->num_remote_opens); diff --git a/fs/smb/client/smb2pdu.h b/fs/smb/client/smb2pdu.h index 220994d0a0f7..db08194484e0 100644 --- a/fs/smb/client/smb2pdu.h +++ b/fs/smb/client/smb2pdu.h @@ -319,13 +319,15 @@ struct smb2_file_reparse_point_info { } __packed; struct smb2_file_network_open_info { - __le64 CreationTime; - __le64 LastAccessTime; - __le64 LastWriteTime; - __le64 ChangeTime; - __le64 AllocationSize; - __le64 EndOfFile; - __le32 Attributes; + struct_group(network_open_info, + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + __le64 AllocationSize; + __le64 EndOfFile; + __le32 Attributes; + ); __le32 Reserved; } __packed; /* level 34 Query also similar returned in close rsp and open rsp */ diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h index 8983f45f8430..9fbaaa387dcc 100644 --- a/fs/smb/common/smb2pdu.h +++ b/fs/smb/common/smb2pdu.h @@ -702,13 +702,16 @@ struct smb2_close_rsp { __le16 StructureSize; /* 60 */ __le16 Flags; __le32 Reserved; - __le64 CreationTime; - __le64 LastAccessTime; - __le64 LastWriteTime; - __le64 ChangeTime; - __le64 AllocationSize; /* Beginning of FILE_STANDARD_INFO equivalent */ - __le64 EndOfFile; - __le32 Attributes; + struct_group(network_open_info, + __le64 CreationTime; + __le64 LastAccessTime; + __le64 LastWriteTime; + __le64 ChangeTime; + /* Beginning of FILE_STANDARD_INFO equivalent */ + __le64 AllocationSize; + __le64 EndOfFile; + __le32 Attributes; + ); } __packed; -- cgit v1.2.3