From: kernel test robot <lkp@intel.com>
To: Ritvik Budhiraja <rbudhiraja@microsoft.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Linux Memory Management List <linux-mm@kvack.org>,
Steve French <stfrench@microsoft.com>
Subject: [linux-next:master 3307/3504] fs/smb/client/file.c:728:12: warning: variable 'rc' is used uninitialized whenever 'if' condition is false
Date: Wed, 3 Apr 2024 13:50:34 +0800 [thread overview]
Message-ID: <202404031346.wpIhNpyF-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 727900b675b749c40ba1f6669c7ae5eb7eb8e837
commit: a423dcbdabf457c0fff3669b0b20708d287c92c2 [3307/3504] smb3: retrying on failed server close
config: s390-defconfig (https://download.01.org/0day-ci/archive/20240403/202404031346.wpIhNpyF-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 546dc2245ffc4cccd0b05b58b7a5955e355a3b27)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240403/202404031346.wpIhNpyF-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404031346.wpIhNpyF-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/s390/include/asm/pgalloc.h:18:
In file included from include/linux/mm.h:2208:
include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
509 | item];
| ~~~~
include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
516 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
528 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
537 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
In file included from fs/smb/client/file.c:27:
In file included from fs/smb/client/cifspdu.h:12:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:38:
In file included from include/net/net_namespace.h:43:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
| ^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
| ^
In file included from fs/smb/client/file.c:27:
In file included from fs/smb/client/cifspdu.h:12:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:38:
In file included from include/net/net_namespace.h:43:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
| ^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
| ^
In file included from fs/smb/client/file.c:27:
In file included from fs/smb/client/cifspdu.h:12:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:38:
In file included from include/net/net_namespace.h:43:
In file included from include/linux/skbuff.h:28:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
692 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
700 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
708 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
717 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
726 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
735 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> fs/smb/client/file.c:728:12: warning: variable 'rc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
728 | else if (server->ops->close)
| ^~~~~~~~~~~~~~~~~~
fs/smb/client/file.c:732:7: note: uninitialized use occurs here
732 | if (rc == -EBUSY || rc == -EAGAIN) {
| ^~
fs/smb/client/file.c:728:8: note: remove the 'if' if its condition is always true
728 | else if (server->ops->close)
| ^~~~~~~~~~~~~~~~~~~~~~~
729 | rc = server->ops->close(xid, tcon, &cifs_file->fid);
fs/smb/client/file.c:723:9: note: initialize the variable 'rc' to silence this warning
723 | int rc;
| ^
| = 0
18 warnings generated.
vim +728 fs/smb/client/file.c
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 646
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 647 /**
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 648 * _cifsFileInfo_put - release a reference of file priv data
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 649 *
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 650 * This may involve closing the filehandle @cifs_file out on the
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 651 * server. Must be called without holding tcon->open_file_lock,
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 652 * cinode->open_file_lock and cifs_file->file_info_lock.
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 653 *
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 654 * If @wait_for_oplock_handler is true and we are releasing the last
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 655 * reference, wait for any running oplock break handler of the file
607dfc79c37a0e fs/cifs/file.c Steve French 2020-12-12 656 * and cancel any pending one.
607dfc79c37a0e fs/cifs/file.c Steve French 2020-12-12 657 *
607dfc79c37a0e fs/cifs/file.c Steve French 2020-12-12 658 * @cifs_file: cifs/smb3 specific info (eg refcounts) for an open file
607dfc79c37a0e fs/cifs/file.c Steve French 2020-12-12 659 * @wait_oplock_handler: must be false if called from oplock_break_handler
607dfc79c37a0e fs/cifs/file.c Steve French 2020-12-12 660 * @offload: not offloaded on close and oplock breaks
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 661 *
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 662 */
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 663 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file,
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 664 bool wait_oplock_handler, bool offload)
b33879aa834ebe fs/cifs/file.c Jeff Layton 2010-10-15 665 {
2b0143b5c986be fs/cifs/file.c David Howells 2015-03-17 666 struct inode *inode = d_inode(cifs_file->dentry);
96daf2b09178d8 fs/cifs/file.c Steve French 2011-05-27 667 struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink);
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 668 struct TCP_Server_Info *server = tcon->ses->server;
e66673e39ac9d4 fs/cifs/file.c Pavel Shilovsky 2010-11-02 669 struct cifsInodeInfo *cifsi = CIFS_I(inode);
24261fc23db950 fs/cifs/file.c Mateusz Guzik 2013-03-08 670 struct super_block *sb = inode->i_sb;
24261fc23db950 fs/cifs/file.c Mateusz Guzik 2013-03-08 671 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
2bff0659338e58 fs/cifs/file.c Steve French 2022-10-14 672 struct cifs_fid fid = {};
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 673 struct cifs_pending_open open;
ca7df8e0bb2a5e fs/cifs/file.c Sachin Prabhu 2015-01-15 674 bool oplock_break_cancelled;
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 675 bool serverclose_offloaded = false;
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 676
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 677 spin_lock(&tcon->open_file_lock);
1a67c415965752 fs/cifs/file.c Pavel Shilovsky 2019-10-23 678 spin_lock(&cifsi->open_file_lock);
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 679 spin_lock(&cifs_file->file_info_lock);
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 680
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 681 cifs_file->offload = offload;
5f6dbc9e4afe4d fs/cifs/file.c Jeff Layton 2010-10-15 682 if (--cifs_file->count > 0) {
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 683 spin_unlock(&cifs_file->file_info_lock);
1a67c415965752 fs/cifs/file.c Pavel Shilovsky 2019-10-23 684 spin_unlock(&cifsi->open_file_lock);
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 685 spin_unlock(&tcon->open_file_lock);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 686 return;
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 687 }
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 688 spin_unlock(&cifs_file->file_info_lock);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 689
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 690 if (server->ops->get_lease_key)
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 691 server->ops->get_lease_key(inode, &fid);
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 692
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 693 /* store open in pending opens to make sure we don't miss lease break */
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 694 cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open);
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 695
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 696 /* remove it from the lists */
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 697 list_del(&cifs_file->flist);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 698 list_del(&cifs_file->tlist);
fae8044c03c3c0 fs/cifs/file.c Steve French 2018-10-19 699 atomic_dec(&tcon->num_local_opens);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 700
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 701 if (list_empty(&cifsi->openFileList)) {
f96637be081141 fs/cifs/file.c Joe Perches 2013-05-04 702 cifs_dbg(FYI, "closing last open instance for inode %p\n",
2b0143b5c986be fs/cifs/file.c David Howells 2015-03-17 703 d_inode(cifs_file->dentry));
253641388a4925 fs/cifs/file.c Pavel Shilovsky 2012-09-18 704 /*
253641388a4925 fs/cifs/file.c Pavel Shilovsky 2012-09-18 705 * In strict cache mode we need invalidate mapping on the last
253641388a4925 fs/cifs/file.c Pavel Shilovsky 2012-09-18 706 * close because it may cause a error when we open this file
253641388a4925 fs/cifs/file.c Pavel Shilovsky 2012-09-18 707 * again and get at least level II oplock.
253641388a4925 fs/cifs/file.c Pavel Shilovsky 2012-09-18 708 */
4f8ba8a0c09593 fs/cifs/file.c Pavel Shilovsky 2010-11-21 709 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
aff8d5ca7a3dca fs/cifs/file.c Jeff Layton 2014-04-30 710 set_bit(CIFS_INO_INVALID_MAPPING, &cifsi->flags);
c67236281c5d74 fs/cifs/file.c Pavel Shilovsky 2010-11-03 711 cifs_set_oplock_level(cifsi, 0);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 712 }
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 713
1a67c415965752 fs/cifs/file.c Pavel Shilovsky 2019-10-23 714 spin_unlock(&cifsi->open_file_lock);
3afca265b5f53a fs/cifs/file.c Steve French 2016-09-22 715 spin_unlock(&tcon->open_file_lock);
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 716
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 717 oplock_break_cancelled = wait_oplock_handler ?
b98749cac4a695 fs/cifs/file.c Aurelien Aptel 2019-03-29 718 cancel_work_sync(&cifs_file->oplock_break) : false;
ad635942c869ad fs/cifs/file.c Jeff Layton 2011-07-26 719
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 720 if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
0ff78a221bf783 fs/cifs/file.c Pavel Shilovsky 2012-09-18 721 struct TCP_Server_Info *server = tcon->ses->server;
6d5786a34d98bf fs/cifs/file.c Pavel Shilovsky 2012-06-20 722 unsigned int xid;
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 723 int rc;
0ff78a221bf783 fs/cifs/file.c Pavel Shilovsky 2012-09-18 724
6d5786a34d98bf fs/cifs/file.c Pavel Shilovsky 2012-06-20 725 xid = get_xid();
43f8a6a74ee244 fs/cifs/file.c Steve French 2019-12-02 726 if (server->ops->close_getattr)
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 727 rc = server->ops->close_getattr(xid, tcon, cifs_file);
43f8a6a74ee244 fs/cifs/file.c Steve French 2019-12-02 @728 else if (server->ops->close)
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 729 rc = server->ops->close(xid, tcon, &cifs_file->fid);
760ad0cac19835 fs/cifs/file.c Pavel Shilovsky 2012-09-25 730 _free_xid(xid);
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 731
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 732 if (rc == -EBUSY || rc == -EAGAIN) {
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 733 // Server close failed, hence offloading it as an async op
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 734 queue_work(serverclose_wq, &cifs_file->serverclose);
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 735 serverclose_offloaded = true;
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 736 }
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 737 }
cdff08e76612e5 fs/cifs/file.c Steve French 2010-10-21 738
ca7df8e0bb2a5e fs/cifs/file.c Sachin Prabhu 2015-01-15 739 if (oplock_break_cancelled)
ca7df8e0bb2a5e fs/cifs/file.c Sachin Prabhu 2015-01-15 740 cifs_done_oplock_break(cifsi);
ca7df8e0bb2a5e fs/cifs/file.c Sachin Prabhu 2015-01-15 741
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 742 cifs_del_pending_open(&open);
233839b1df65a2 fs/cifs/file.c Pavel Shilovsky 2012-09-19 743
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 744 // if serverclose has been offloaded to wq (on failure), it will
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 745 // handle offloading put as well. If serverclose not offloaded,
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 746 // we need to handle offloading put here.
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 747 if (!serverclose_offloaded) {
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 748 if (offload)
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 749 queue_work(fileinfo_put_wq, &cifs_file->put);
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 750 else
32546a9586aa45 fs/cifs/file.c Ronnie Sahlberg 2019-11-03 751 cifsFileInfo_put_final(cifs_file);
b33879aa834ebe fs/cifs/file.c Jeff Layton 2010-10-15 752 }
a423dcbdabf457 fs/smb/client/file.c Ritvik Budhiraja 2024-04-02 753 }
b33879aa834ebe fs/cifs/file.c Jeff Layton 2010-10-15 754
:::::: The code at line 728 was first introduced by commit
:::::: 43f8a6a74ee2442b9410ed297f5d4c77e7cb5ace smb3: query attributes on file close
:::::: TO: Steve French <stfrench@microsoft.com>
:::::: CC: Steve French <stfrench@microsoft.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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