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X-CSE-ConnectionGUID: QOGGOd9XTsyHZ7mEVbGM0Q== X-CSE-MsgGUID: WQgz2VlMSFeQJPbk/Pa7LQ== X-IronPort-AV: E=McAfee;i="6800,10657,11859"; a="111434720" X-IronPort-AV: E=Sophos;i="6.25,191,1779174000"; d="scan'208";a="111434720" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2026 18:51:16 -0700 X-CSE-ConnectionGUID: z/acK+hcSqm35wdeKeYKwg== X-CSE-MsgGUID: 2MPgRUH3RMOuV4jAENuZgQ== X-ExtLoop1: 1 Received: from igk-lkp-server01.igk.intel.com (HELO 3cba2a188a06) ([10.211.93.152]) by fmviesa003.fm.intel.com with ESMTP; 28 Jul 2026 18:51:14 -0700 Received: from kbuild by 3cba2a188a06 with local (Exim 4.98.2) (envelope-from ) id 1wotRw-0000000024K-1X1p; Wed, 29 Jul 2026 01:51:12 +0000 Date: Wed, 29 Jul 2026 03:50:54 +0200 From: kernel test robot To: Bryam Vargas Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, 0day robot Subject: fs/smb/client/cifssmb.c:1791:19: warning: implicit conversion from 'int' to 'enum smb_eio_trace' changes value from 128 to -128 Message-ID: <202607290344.fvDmgRPA-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://github.com/intel-lab-lkp/linux/commits/Bryam-Vargas-via-B4-Relay/smb-client-reject-a-tree-connect-response-whose-byte-count-is-too-small/20260729-024634 head: d893e4288f59fd7cc9dc88506cddc9f5218d02ea commit: d893e4288f59fd7cc9dc88506cddc9f5218d02ea smb: client: reject a tree connect response whose byte count is too small date: 7 hours ago config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260729/202607290344.fvDmgRPA-lkp@intel.com/config) compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260729/202607290344.fvDmgRPA-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202607290344.fvDmgRPA-lkp@intel.com/ All warnings (new ones prefixed by >>): >> fs/smb/client/cifssmb.c:1791:19: warning: implicit conversion from 'int' to 'enum smb_eio_trace' changes value from 128 to -128 [-Wconstant-conversion] 1791 | return smb_EIO(smb_eio_trace_write_too_far); | ~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/smb/client/cifssmb.c:1982:17: warning: implicit conversion from 'int' to 'enum smb_eio_trace' changes value from 128 to -128 [-Wconstant-conversion] 1982 | rc = smb_EIO(smb_eio_trace_write_too_far); | ~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/smb/client/cifssmb.c:2074:19: warning: implicit conversion from 'int' to 'enum smb_eio_trace' changes value from 128 to -128 [-Wconstant-conversion] 2074 | return smb_EIO(smb_eio_trace_write_too_far); | ~~~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 warnings generated. vim +1791 fs/smb/client/cifssmb.c ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1761 ec637e3ffb6b97 fs/cifs/cifssmb.c Steve French 2005-12-12 1762 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1763 int 6d5786a34d98bf fs/cifs/cifssmb.c Pavel Shilovsky 2012-06-20 1764 CIFSSMBWrite(const unsigned int xid, struct cifs_io_parms *io_parms, dbbab32574c384 fs/cifs/cifssmb.c Al Viro 2016-09-05 1765 unsigned int *nbytes, const char *buf) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1766 { ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1767 int rc = -EACCES; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1768 WRITE_REQ *pSMB = NULL; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1769 WRITE_RSP *pSMBr = NULL; 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1770 int bytes_returned, wct; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1771 __u32 bytes_sent; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1772 __u16 byte_count; fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1773 __u32 pid = io_parms->pid; fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1774 __u16 netfid = io_parms->netfid; fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1775 __u64 offset = io_parms->offset; 96daf2b09178d8 fs/cifs/cifssmb.c Steve French 2011-05-27 1776 struct cifs_tcon *tcon = io_parms->tcon; 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1777 unsigned int count = io_parms->length, in_len; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1778 a24e2d7d8f5123 fs/cifs/cifssmb.c Steve French 2010-04-03 1779 *nbytes = 0; a24e2d7d8f5123 fs/cifs/cifssmb.c Steve French 2010-04-03 1780 f96637be081141 fs/cifs/cifssmb.c Joe Perches 2013-05-04 1781 /* cifs_dbg(FYI, "write at %lld %d bytes\n", offset, count);*/ 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1782 if (tcon->ses == NULL) 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1783 return -ECONNABORTED; 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1784 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1785 if (tcon->ses->capabilities & CAP_LARGE_FILES) 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1786 wct = 14; 4c3130efda1ef4 fs/cifs/cifssmb.c Steve French 2008-12-09 1787 else { 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1788 wct = 12; 4c3130efda1ef4 fs/cifs/cifssmb.c Steve French 2008-12-09 1789 if ((offset >> 32) > 0) { 4c3130efda1ef4 fs/cifs/cifssmb.c Steve French 2008-12-09 1790 /* can not handle big offset for old srv */ f80ac7eda1cf52 fs/smb/client/cifssmb.c David Howells 2025-10-24 @1791 return smb_EIO(smb_eio_trace_write_too_far); 4c3130efda1ef4 fs/cifs/cifssmb.c Steve French 2008-12-09 1792 } 4c3130efda1ef4 fs/cifs/cifssmb.c Steve French 2008-12-09 1793 } 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1794 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1795 rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB, ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1796 (void **) &pSMBr); 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1797 if (rc < 0) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1798 return rc; 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1799 in_len = rc; fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1800 fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1801 pSMB->hdr.Pid = cpu_to_le16((__u16)pid); fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1802 pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid >> 16)); fa2989f4473413 fs/cifs/cifssmb.c Pavel Shilovsky 2011-05-26 1803 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1804 /* tcon and ses pointer are checked in smb_init */ ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1805 if (tcon->ses->server == NULL) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1806 return -ECONNABORTED; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1807 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1808 pSMB->AndXCommand = 0xFF; /* none */ ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1809 pSMB->Fid = netfid; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1810 pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF); 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1811 if (wct == 14) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1812 pSMB->OffsetHigh = cpu_to_le32(offset >> 32); 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1813 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1814 pSMB->Reserved = 0xFFFFFFFF; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1815 pSMB->WriteMode = 0; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1816 pSMB->Remaining = 0; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1817 50c2f753887270 fs/cifs/cifssmb.c Steve French 2007-07-13 1818 /* Can increase buffer size if buffer is big enough in some cases ie we ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1819 can send more if LARGE_WRITE_X capability returned by the server and if ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1820 our buffer is big enough or if we convert to iovecs on socket writes ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1821 and eliminate the copy to the CIFS buffer */ ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1822 if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) { ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1823 bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1824 } else { ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1825 bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1826 & ~0xFF; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1827 } ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1828 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1829 if (bytes_sent > count) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1830 bytes_sent = count; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1831 pSMB->DataOffset = 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1832 cpu_to_le16(offsetof(struct smb_com_write_req, Data)); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1833 if (buf) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1834 memcpy(pSMB->Data, buf, bytes_sent); dbbab32574c384 fs/cifs/cifssmb.c Al Viro 2016-09-05 1835 else if (count != 0) { ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1836 /* No buffer */ ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1837 cifs_buf_release(pSMB); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1838 return -EINVAL; e30dcf3a1905b4 fs/cifs/cifssmb.c Steve French 2005-09-20 1839 } /* else setting file size with write of zero bytes */ e30dcf3a1905b4 fs/cifs/cifssmb.c Steve French 2005-09-20 1840 if (wct == 14) e30dcf3a1905b4 fs/cifs/cifssmb.c Steve French 2005-09-20 1841 byte_count = bytes_sent + 1; /* pad */ ad7a2926b9e53c fs/cifs/cifssmb.c Steve French 2008-02-07 1842 else /* wct == 12 */ e30dcf3a1905b4 fs/cifs/cifssmb.c Steve French 2005-09-20 1843 byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */ ad7a2926b9e53c fs/cifs/cifssmb.c Steve French 2008-02-07 1844 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1845 pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1846 pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16); 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1847 in_len += byte_count; 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1848 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1849 if (wct == 14) ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1850 pSMB->ByteCount = cpu_to_le16(byte_count); 50c2f753887270 fs/cifs/cifssmb.c Steve French 2007-07-13 1851 else { /* old style write has byte count 4 bytes earlier 50c2f753887270 fs/cifs/cifssmb.c Steve French 2007-07-13 1852 so 4 bytes pad */ 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1853 struct smb_com_writex_req *pSMBW = 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1854 (struct smb_com_writex_req *)pSMB; 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1855 pSMBW->ByteCount = cpu_to_le16(byte_count); 1c9551878c4629 fs/cifs/cifssmb.c Steve French 2005-08-30 1856 } ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1857 83bfbd0bb9025f fs/smb/client/cifssmb.c David Howells 2025-09-05 1858 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, in_len, dbbab32574c384 fs/cifs/cifssmb.c Al Viro 2016-09-05 1859 (struct smb_hdr *) pSMBr, &bytes_returned, 0); 44c581866e2ae4 fs/cifs/cifssmb.c Pavel Shilovsky 2012-05-28 1860 cifs_stats_inc(&tcon->stats.cifs_stats.num_writes); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1861 if (rc) { f96637be081141 fs/cifs/cifssmb.c Joe Perches 2013-05-04 1862 cifs_dbg(FYI, "Send error in write = %d\n", rc); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1863 } else { ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1864 *nbytes = le16_to_cpu(pSMBr->CountHigh); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1865 *nbytes = (*nbytes) << 16; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1866 *nbytes += le16_to_cpu(pSMBr->Count); 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1867 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1868 /* 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1869 * Mask off high 16 bits when bytes written as returned by the 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1870 * server is greater than bytes requested by the client. Some 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1871 * OS/2 servers are known to set incorrect CountHigh values. 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1872 */ 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1873 if (*nbytes > count) 6513a81e9325d7 fs/cifs/cifssmb.c Suresh Jayaraman 2010-03-31 1874 *nbytes &= 0xFFFF; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1875 } ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1876 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1877 cifs_buf_release(pSMB); ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1878 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1879 /* Note: On -EAGAIN error only caller can retry on handle based calls ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1880 since file handle passed in no longer valid */ ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1881 ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1882 return rc; ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1883 } ^1da177e4c3f41 fs/cifs/cifssmb.c Linus Torvalds 2005-04-16 1884 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki