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AHgh+Rpy6PqF146EocIOueGrWTlYaJTtGxSRNyx3tnHmu3vk6Qwn4jLtWvW739io4XQRJzLouFvq83z1kk4e@vger.kernel.org X-Gm-Message-State: AOJu0YwyDPaELYTSDYfZWC8i5hRuQUqSKiBJEPQusgr5e7oXsqQIjVWV ZTp4L7tuacB1onOtwUk+lzo08yJgIZXxFngAVoa0Zhk5ii9jCpHuPlBaMIPN45h9lcR2lYqKBnc ebKEJkpvvu+EXzraub2KHsxd1wmww1VBW32g27RJ5NaHYvoUcQ0rgkSuvySA= Precedence: bulk X-Mailing-List: linux-edac@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1a0d:b0:495:ca1b:7865 with SMTP id 5614622812f47-4ae318da863mr3238166b6e.11.1785518130646; Fri, 31 Jul 2026 10:15:30 -0700 (PDT) Date: Fri, 31 Jul 2026 10:15:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a6cd832.1aa927e4.17d4bf.0008.GAE@google.com> Subject: [syzbot] [edac?] general protection fault in detach_timer (3) From: syzbot To: bp@alien8.de, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org, tony.luck@intel.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cc2b5f627e8c Add linux-next specific files for 20260714 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=17ba25b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2290ccbf984c524f dashboard link: https://syzkaller.appspot.com/bug?extid=edc6b57cbed1fb72d0f9 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13334aea580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156ce249580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6836f8efb1da/disk-cc2b5f62.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0109d3477cc7/vmlinux-cc2b5f62.xz kernel image: https://storage.googleapis.com/syzbot-assets/c2e49e350bbf/bzImage-cc2b5f62.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+edc6b57cbed1fb72d0f9@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000025: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead000000000128-0xdead00000000012f] CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__hlist_del include/linux/list.h:1031 [inline] RIP: 0010:detach_timer+0x120/0x2d0 kernel/time/timer.c:891 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 e7 e8 a9 51 80 00 4d 89 3c 24 4d 85 ff 74 46 e8 cb f9 13 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 82 51 80 00 4d 89 27 80 7c 24 04 00 RSP: 0018:ffffc90000157af8 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff110170e4694 RCX: ffff88801daf8000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffffc90000157c00 R13: ffff8880b87234a8 R14: 1ffff110170e4695 R15: dead00000000012a FS: 0000000000000000(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a50cf012d CR3: 000000004485e000 CR4: 00000000003526f0 Call Trace: expire_timers kernel/time/timer.c:1782 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x5f8/0x9b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0x67/0x170 kernel/time/timer.c:2403 handle_softirqs+0x1d9/0x6c0 kernel/softirq.c:626 __do_softirq kernel/softirq.c:660 [inline] run_ktimerd+0x69/0x100 kernel/softirq.c:1155 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:1031 [inline] RIP: 0010:detach_timer+0x120/0x2d0 kernel/time/timer.c:891 Code: c1 e8 03 80 3c 28 00 74 08 4c 89 e7 e8 a9 51 80 00 4d 89 3c 24 4d 85 ff 74 46 e8 cb f9 13 00 49 83 c7 08 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 82 51 80 00 4d 89 27 80 7c 24 04 00 RSP: 0018:ffffc90000157af8 EFLAGS: 00010802 RAX: 1bd5a00000000025 RBX: 1ffff110170e4694 RCX: ffff88801daf8000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: ffffc90000157c00 R13: ffff8880b87234a8 R14: 1ffff110170e4695 R15: dead00000000012a FS: 0000000000000000(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a50cf012d CR3: 000000004485e000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 7: 74 08 je 0x11 9: 4c 89 e7 mov %r12,%rdi c: e8 a9 51 80 00 call 0x8051ba 11: 4d 89 3c 24 mov %r15,(%r12) 15: 4d 85 ff test %r15,%r15 18: 74 46 je 0x60 1a: e8 cb f9 13 00 call 0x13f9ea 1f: 49 83 c7 08 add $0x8,%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 82 51 80 00 call 0x8051ba 38: 4d 89 27 mov %r12,(%r15) 3b: 80 7c 24 04 00 cmpb $0x0,0x4(%rsp) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup