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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:26c2:b0:887:26b5:a581 with SMTP id ca18e2360f4ac-88726b5b5bemr257271839f.12.1756846473712; Tue, 02 Sep 2025 13:54:33 -0700 (PDT) Date: Tue, 02 Sep 2025 13:54:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b75989.050a0220.3db4df.01dd.GAE@google.com> Subject: [syzbot] [kernel?] general protection fault in try_to_wake_up (3) From: syzbot To: andrealmeid@igalia.com, dave@stgolabs.net, dvhart@infradead.org, linux-kernel@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5c3b3264e585 Merge tag 'x86_urgent_for_v6.17_rc4' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12e1ae34580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bd9738e00c1bbfb4 dashboard link: https://syzkaller.appspot.com/bug?extid=034246a838a10d181e78 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f6a1f0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/37953b384dff/disk-5c3b3264.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/df5cc1c4e51d/vmlinux-5c3b3264.xz kernel image: https://storage.googleapis.com/syzbot-assets/2ed6195eae9f/bzImage-5c3b3264.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+034246a838a10d181e78@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc000000014b: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000a58-0x0000000000000a5f] CPU: 1 UID: 0 PID: 6293 Comm: syz.0.60 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:199 Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 d0 9f dc 08 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000157f7e0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: ffffffff8af9dfe7 RCX: e1dbfc1ee2ae4a00 RDX: 0000000000000000 RSI: ffffffff8af9dfe7 RDI: 000000000000014b RBP: ffffffff81908477 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1e3a947 R12: 0000000000000000 R13: 0000000000000a58 R14: 0000000000000a58 R15: 0000000000000001 FS: 00007ff6ed61d6c0(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff6ed61cf40 CR3: 0000000027554000 CR4: 00000000003526f0 Call Trace: __kasan_check_byte+0x12/0x40 mm/kasan/common.c:567 kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline] try_to_wake_up+0x67/0x12b0 kernel/sched/core.c:4216 requeue_pi_wake_futex+0x24b/0x2f0 kernel/futex/requeue.c:249 futex_proxy_trylock_atomic kernel/futex/requeue.c:340 [inline] futex_requeue+0x135f/0x1870 kernel/futex/requeue.c:498 do_futex+0x362/0x420 kernel/futex/syscalls.c:-1 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff6edfcebe9 Code: ff ff 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff6ed61d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007ff6ee206090 RCX: 00007ff6edfcebe9 RDX: 0000000000000001 RSI: 000000000000000c RDI: 000020000000cffc RBP: 00007ff6ee051e19 R08: 0000200000048000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff6ee206128 R14: 00007ff6ee206090 R15: 00007ffd53c7a368 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:199 Code: 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 d0 9f dc 08 cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000157f7e0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: ffffffff8af9dfe7 RCX: e1dbfc1ee2ae4a00 RDX: 0000000000000000 RSI: ffffffff8af9dfe7 RDI: 000000000000014b RBP: ffffffff81908477 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff1e3a947 R12: 0000000000000000 R13: 0000000000000a58 R14: 0000000000000a58 R15: 0000000000000001 FS: 00007ff6ed61d6c0(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff6ed61cf40 CR3: 0000000027554000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 66 0f 1f 00 nopw (%rax) 1c: 48 c1 ef 03 shr $0x3,%rdi 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2e: 3c 08 cmp $0x8,%al 30: 0f 92 c0 setb %al 33: e9 d0 9f dc 08 jmp 0x8dca008 38: cc int3 39: 66 data16 3a: 66 data16 3b: 66 data16 3c: 66 data16 3d: 66 data16 3e: 66 data16 3f: 2e cs --- 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