tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 001f12b6928e25e5551ad2fbae86556c280757a1 commit: 28b546c67ad5b05406ea31184515152c8b0abeba [19767/22580] CIFS: Fix retry mid list corruption on reconnects config: x86_64-randconfig-161-20240530 (https://download.01.org/0day-ci/archive/20240530/202405301643.qKz6P2N2-lkp@i...) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) 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/202405301643.qKz6P2N2-lkp@intel.com/ smatch warnings: fs/cifs/transport.c:108 _cifs_mid_q_entry_release() warn: always true condition '(((midEntry->command)) >= 0) => (0-u16max >= 0)' vim +108 fs/cifs/transport.c ^1da177e4c3f415 Linus Torvalds 2005-04-16 85 696e420bb2a6624 Lars Persson 2018-06-25 86 static void _cifs_mid_q_entry_release(struct kref *refcount) 696e420bb2a6624 Lars Persson 2018-06-25 87 { 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 88 struct mid_q_entry *midEntry = 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 89 container_of(refcount, struct mid_q_entry, refcount); 1047abc159b4eb4 Steve French 2005-10-11 90 #ifdef CONFIG_CIFS_STATS2 2dc7e1c03316940 Pavel Shilovsky 2011-12-26 91 __le16 command = midEntry->server->vals->lock_cmd; 1047abc159b4eb4 Steve French 2005-10-11 92 unsigned long now; 1047abc159b4eb4 Steve French 2005-10-11 93 #endif 7c9421e1a9ce8d1 Pavel Shilovsky 2012-03-23 94 midEntry->mid_state = MID_FREE; 8097531a5cb55c6 Jeff Layton 2011-01-11 95 atomic_dec(&midCount); 7c9421e1a9ce8d1 Pavel Shilovsky 2012-03-23 96 if (midEntry->large_buf) ^1da177e4c3f415 Linus Torvalds 2005-04-16 97 cifs_buf_release(midEntry->resp_buf); b8643e1b5253a6a Steve French 2005-04-28 98 else b8643e1b5253a6a Steve French 2005-04-28 99 cifs_small_buf_release(midEntry->resp_buf); 1047abc159b4eb4 Steve French 2005-10-11 100 #ifdef CONFIG_CIFS_STATS2 1047abc159b4eb4 Steve French 2005-10-11 101 now = jiffies; 1047abc159b4eb4 Steve French 2005-10-11 102 /* commands taking longer than one second are indications that 1047abc159b4eb4 Steve French 2005-10-11 103 something is wrong, unless it is quite a slow link or server */ 020eec5f712ffb4 Steve French 2018-08-01 104 if (time_after(now, midEntry->when_alloc + HZ) && 020eec5f712ffb4 Steve French 2018-08-01 105 (midEntry->command != command)) { 468d677954c0d94 Steve French 2018-08-04 106 /* smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command */ 468d677954c0d94 Steve French 2018-08-04 107 if ((le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS) && 468d677954c0d94 Steve French 2018-08-04 @108 (le16_to_cpu(midEntry->command) >= 0)) 468d677954c0d94 Steve French 2018-08-04 109 cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]); 468d677954c0d94 Steve French 2018-08-04 110 020eec5f712ffb4 Steve French 2018-08-01 111 trace_smb3_slow_rsp(le16_to_cpu(midEntry->command), 020eec5f712ffb4 Steve French 2018-08-01 112 midEntry->mid, midEntry->pid, 020eec5f712ffb4 Steve French 2018-08-01 113 midEntry->when_sent, midEntry->when_received); 020eec5f712ffb4 Steve French 2018-08-01 114 if (cifsFYI & CIFS_TIMER) { 0b456f04bcdf5b1 Andy Shevchenko 2014-08-27 115 pr_debug(" CIFS slow rsp: cmd %d mid %llu", 1047abc159b4eb4 Steve French 2005-10-11 116 midEntry->command, midEntry->mid); 0b456f04bcdf5b1 Andy Shevchenko 2014-08-27 117 pr_info(" A: 0x%lx S: 0x%lx R: 0x%lx\n", 1047abc159b4eb4 Steve French 2005-10-11 118 now - midEntry->when_alloc, 1047abc159b4eb4 Steve French 2005-10-11 119 now - midEntry->when_sent, 1047abc159b4eb4 Steve French 2005-10-11 120 now - midEntry->when_received); 1047abc159b4eb4 Steve French 2005-10-11 121 } 1047abc159b4eb4 Steve French 2005-10-11 122 } 1047abc159b4eb4 Steve French 2005-10-11 123 #endif 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 124 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 125 mempool_free(midEntry, cifs_mid_poolp); 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 126 } 28b546c67ad5b05 Pavel Shilovsky 2022-08-27 127 :::::: The code at line 108 was first introduced by commit :::::: 468d677954c0d94fec59275d91222257fe8b4416 smb3: display stats counters for number of slow commands :::::: 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