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X-Gm-Message-State: APuU4Z+wINPb3b5x+cRkdfZ0FDgoz7wk6RAtm28jYJjtstO5dYOd3fK4 /sjXv/1t2L5gy6O3Wbd82I5G5PXENcfnfzKAMf9sOH89a0KebEXc8GI+ZTOWg8RBN2VsPT891oY to4lsAnLXfUbLGdcbsBnGdlnqkCae4WwCq731fmnM88AqrmzykRbriA6XpHY= X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6808:1790:b0:571:b166:3d76 with SMTP id 5614622812f47-571b1759e5amr3452890b6e.29.1794731194561; Sun, 15 Nov 2026 00:26:34 -0800 (PST) Date: Sun, 15 Nov 2026 00:26:34 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6af96cba.bce61036.122766.0045.GAE@google.com> Subject: [syzbot] [kernel?] KASAN: stack-out-of-bounds Write in __hrtimer_run_queues From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 23c62304dde2 Merge tag 'for-linus-7.4a-rc3-tag' of git://g.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=15adb9ad580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c210800cfc8f61e dashboard link: https://syzkaller.appspot.com/bug?extid=c6b6d5e5800184a5fa86 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16b86d3d580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c6b6d5e5800184a5fa86@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 2 UID: 0 PID: 6558 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:lookup_object lib/debugobjects.c:440 [inline] RIP: 0010:debug_object_deactivate+0x19b/0x3b0 lib/debugobjects.c:938 Code: 48 c1 e8 03 42 80 3c 28 00 0f 85 8e 01 00 00 48 8b 1b 48 85 db 0f 84 32 01 00 00 48 8d 7b 18 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 4c 01 00 00 4c 3b 73 18 75 c2 48 b8 00 00 00 RSP: 0018:ffffc90000548da0 EFLAGS: 00010003 RAX: 0000000000000002 RBX: ffffffffffffffff RCX: 0000000000000002 RDX: ffffffff9cee70b0 RSI: 0000000000000004 RDI: 0000000000000017 RBP: ffffc90000548e80 R08: 0000000000000001 R09: fffff520000a91a2 R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffffc9000635fd50 R15: 1ffff920000a91b6 FS: 0000000000000000(0000) GS:ffff888095472000(0063) knlGS:00000000f687eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000032963fff CR3: 000000006e2ab000 CR4: 0000000000352ef0 Call Trace: debug_hrtimer_deactivate kernel/time/hrtimer.c:491 [inline] __run_hrtimer kernel/time/hrtimer.c:2047 [inline] __hrtimer_run_queues+0x2e9/0x9a0 kernel/time/hrtimer.c:2136 hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2255 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:220 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:229 Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 fa 5a f7 f5 48 89 df e8 82 b1 f7 f5 e8 0d a9 24 f6 fb bf 01 00 00 00 d2 77 e6 f5 65 48 83 3d c1 52 c9 09 00 74 06 5b c3 cc cc cc cc RSP: 0018:ffffc90002f3fc08 EFLAGS: 00000202 RAX: 00000000000001c1 RBX: ffffffff90cc6660 RCX: 0000000000000080 RDX: 0000000000000001 RSI: ffffffff8e627409 RDI: 0000000000000001 RBP: 0000000000000060 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880226f3000 R13: 0000000063702f73 R14: ffffffff8be2e420 R15: 000000000000009c pci_user_write_config_dword+0x150/0x230 drivers/pci/access.c:278 proc_bus_pci_write+0x531/0x5e0 drivers/pci/proc.c:173 pde_write fs/proc/inode.c:330 [inline] proc_reg_write+0x240/0x330 fs/proc/inode.c:342 vfs_write+0x2aa/0x1040 fs/read_write.c:665 ksys_write+0x12a/0x250 fs/read_write.c:719 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x14d/0x8e0 arch/x86/entry/syscall_32.c:286 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:311 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc4fbc Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 58 b8 RSP: 002b:00000000f687e50c EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000080000300 RDX: 000000000000010f RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 000 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 9: 0f 85 8e 01 00 00 jne 0x19d f: 48 8b 1b mov (%rbx),%rbx 12: 48 85 db test %rbx,%rbx 15: 0f 84 32 01 00 00 je 0x14d 1b: 48 8d 7b 18 lea 0x18(%rbx),%rdi 1f: 41 83 c4 01 add $0x1,%r12d 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 4c 01 00 00 jne 0x181 35: 4c 3b 73 18 cmp 0x18(%rbx),%r14 39: 75 c2 jne 0xfffffffd 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax) --- 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 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