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Thu, 27 Nov 2025 05:55:44 +0000 Date: Thu, 27 Nov 2025 13:55:35 +0800 From: kernel test robot To: Caleb Sander Mateos CC: , , , Jens Axboe , , "Caleb Sander Mateos" , Subject: Re: [PATCH v3 4/4] io_uring: avoid uring_lock for IORING_SETUP_SINGLE_ISSUER Message-ID: <202511270630.4e038598-lkp@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251125233928.3962947-5-csander@purestorage.com> X-ClientProxiedBy: SI2PR04CA0015.apcprd04.prod.outlook.com (2603:1096:4:197::21) To LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV3PR11MB8603:EE_|PH0PR11MB7585:EE_ X-MS-Office365-Filtering-Correlation-Id: 4d25779c-cfce-4be6-7075-08de2d799aea X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7053199007; 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[ 22.151645][ T6341] RIP: 0010:io_ring_ctx_wait_and_kill (io_uring/io_uring.h:266) [ 22.152382][ T1564] [ 22.152774][ T6341] Code: 02 00 00 e8 af e2 0b 00 65 48 8b 05 97 1a 5f 02 48 3b 44 24 48 0f 85 98 00 00 00 48 83 c4 50 5b 41 5e 41 5f e9 be c6 f8 00 cc <0f> 0b e9 ed fe ff ff 31 c0 4c 8d 7c 24 28 49 89 47 18 49 89 47 10 All code ======== 0: 02 00 add (%rax),%al 2: 00 e8 add %ch,%al 4: af scas %es:(%rdi),%eax 5: e2 0b loop 0x12 7: 00 65 48 add %ah,0x48(%rbp) a: 8b 05 97 1a 5f 02 mov 0x25f1a97(%rip),%eax # 0x25f1aa7 10: 48 3b 44 24 48 cmp 0x48(%rsp),%rax 15: 0f 85 98 00 00 00 jne 0xb3 1b: 48 83 c4 50 add $0x50,%rsp 1f: 5b pop %rbx 20: 41 5e pop %r14 22: 41 5f pop %r15 24: e9 be c6 f8 00 jmp 0xf8c6e7 29: cc int3 2a:* 0f 0b ud2 <-- trapping instruction 2c: e9 ed fe ff ff jmp 0xffffffffffffff1e 31: 31 c0 xor %eax,%eax 33: 4c 8d 7c 24 28 lea 0x28(%rsp),%r15 38: 49 89 47 18 mov %rax,0x18(%r15) 3c: 49 89 47 10 mov %rax,0x10(%r15) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: e9 ed fe ff ff jmp 0xfffffffffffffef4 7: 31 c0 xor %eax,%eax 9: 4c 8d 7c 24 28 lea 0x28(%rsp),%r15 e: 49 89 47 18 mov %rax,0x18(%r15) 12: 49 89 47 10 mov %rax,0x10(%r15) [ 22.154288][ T1564] [main] sysv_shm: id:0 size:40960 flags:7b0 ptr:(nil) [ 22.155063][ T6341] RSP: 0018:ffffc90000217db0 EFLAGS: 00010246 [ 22.155249][ T1564] [ 22.155714][ T6341] [ 22.157177][ T1564] [main] sysv_shm: id:1 size:4096 flags:17b0 ptr:(nil) [ 22.157242][ T6341] RAX: 0000000000000000 RBX: ffff88810d435800 RCX: 0000000000000001 [ 22.157489][ T1564] [ 22.157954][ T6341] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88810d435800 [ 22.159286][ T1564] [main] Added 28 filenames from /dev [ 22.159684][ T6341] RBP: 00000000fffffff2 R08: 0000000000000000 R09: ffffffff00000000 [ 22.159688][ T6341] R10: 0000000000000010 R11: 0000000000100000 R12: 0000000000000000 [ 22.160050][ T1564] [ 22.160414][ T6341] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888119bf9000 [ 22.161762][ T1564] [main] Added 17230 filenames from /proc [ 22.161924][ T6341] FS: 00000000010a2880(0000) GS:ffff88889c519000(0000) knlGS:0000000000000000 [ 22.162568][ T1564] [ 22.162958][ T6341] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.164372][ T1564] [main] Added 15134 filenames from /sys [ 22.164448][ T6341] CR2: 0000000000000008 CR3: 0000000165c9c000 CR4: 00000000000406f0 [ 22.164456][ T6341] Call Trace: [ 22.164626][ T1564] [ 22.166367][ T6341] [ 22.168128][ T1564] [main] Couldn't open socket (30:1:0). Address family not supported by protocol [ 22.168186][ T6341] io_uring_create (io_uring/io_uring.c:?) [ 22.168352][ T1564] [ 22.168974][ T6341] __x64_sys_io_uring_setup (io_uring/io_uring.c:3766) [ 22.170902][ T1564] [main] Couldn't open socket (27:1:3). Address family not supported by protocol [ 22.172459][ T6341] do_syscall_64 (arch/x86/entry/syscall_64.c:?) [ 22.172512][ T1564] [ 22.173163][ T6341] ? exc_page_fault (arch/x86/include/asm/irqflags.h:37 arch/x86/include/asm/irqflags.h:114 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) [ 22.175090][ T1564] [main] Couldn't open socket (44:3:0). Address family not supported by protocol [ 22.175097][ T6341] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 22.175309][ T1564] [ 22.175935][ T6341] RIP: 0033:0x453b29 [ 22.176865][ T1564] Can't do protocol NETBEUI [ 22.176935][ T6341] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 84 00 00 c3 66 2e 0f 1f 84 00 00 00 00 All code ======== 0: 00 f3 add %dh,%bl 2: c3 ret 3: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 40 00 nopl 0x0(%rax) 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 0f 83 3b 84 00 00 jae 0x8471 36: c3 ret 37: 66 data16 38: 2e cs 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax) 3d: 00 00 add %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 0f 83 3b 84 00 00 jae 0x8447 c: c3 ret d: 66 data16 e: 2e cs f: 0f .byte 0xf 10: 1f (bad) 11: 84 00 test %al,(%rax) 13: 00 00 add %al,(%rax) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251127/202511270630.4e038598-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki