Hello, syzbot found the following issue on: HEAD commit: 46ae4d0a4897 Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=106a549f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e10d80c64e440c0 dashboard link: https://syzkaller.appspot.com/bug?extid=8bb3e2bee8a429cc76dd compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=144e27c7980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c16ef5753326/disk-46ae4d0a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4a3a038d0ccf/vmlinux-46ae4d0a.xz kernel image: https://storage.googleapis.com/syzbot-assets/244ada956332/bzImage-46ae4d0a.xz The issue was bisected to: commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 Author: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx> Date: Sat Sep 29 00:59:43 2018 +0000 tc: Add support for configuring the taprio scheduler bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10311900580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12311900580000 console output: https://syzkaller.appspot.com/x/log.txt?x=14311900580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8bb3e2bee8a429cc76dd@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2685 jiffies s: 3289 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5444 Comm: syz-executor Not tainted 6.11.0-rc7-syzkaller-01396-g46ae4d0a4897 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:taprio_set_budgets+0x116/0x370 net/sched/sch_taprio.c:666 Code: 44 24 10 4c 89 74 24 18 4d 89 f5 45 31 ff 48 89 5c 24 08 bf 10 00 00 00 4c 89 fe e8 74 8f d2 f7 49 83 ff 0f 0f 87 63 01 00 00 <4c> 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 RSP: 0018:ffffc90000007c30 EFLAGS: 00000093 RAX: 0000000000010000 RBX: ffff888028fdb130 RCX: ffff888030aada00 RDX: 0000000000010000 RSI: 0000000000000001 RDI: 0000000000000010 RBP: 0000000000000000 R08: ffffffff89c1021c R09: 1ffff110051cea10 R10: dffffc0000000000 R11: ffffed10051cea11 R12: 0000000000000004 R13: ffff888028e75008 R14: ffff888028e75000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb58963cff8 CR3: 00000000311f6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> advance_sched+0x98d/0xca0 net/sched/sch_taprio.c:977 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0x9/0x2a00 arch/x86/kernel/unwind_orc.c:469 Code: 4c 89 f7 e8 69 ad b9 00 e9 53 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 <41> 55 41 54 53 48 81 ec a0 00 00 00 48 89 fd 49 bd 00 00 00 00 00 RSP: 0018:ffffc9000422f120 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffffff820edaf2 RCX: ffff888030aada00 RDX: dffffc0000000000 RSI: ffffffff820edaf2 RDI: ffffc9000422f140 RBP: ffffc9000422f1d0 R08: 000000000000000a R09: ffffc9000422f230 R10: 0000000000000003 R11: ffffffff817f2f80 R12: ffff888030aada00 R13: ffffffff817f2f80 R14: ffffc9000422f220 R15: ffffc9000422f140 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3106 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3210 remove_vma mm/mmap.c:189 [inline] remove_mt mm/mmap.c:2415 [inline] do_vmi_align_munmap+0x155c/0x18c0 mm/mmap.c:2758 do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2830 __vm_munmap+0x1fc/0x400 mm/mmap.c:3109 elf_map fs/binfmt_elf.c:383 [inline] elf_load+0x2d8/0x6f0 fs/binfmt_elf.c:408 load_elf_binary+0xeba/0x2680 fs/binfmt_elf.c:1141 search_binary_handler fs/exec.c:1827 [inline] exec_binprm fs/exec.c:1869 [inline] bprm_execve+0xaf8/0x1770 fs/exec.c:1920 do_execveat_common+0x55f/0x6f0 fs/exec.c:2027 do_execve fs/exec.c:2101 [inline] __do_sys_execve fs/exec.c:2177 [inline] __se_sys_execve fs/exec.c:2172 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2172 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb5887b0df7 Code: Unable to access opcode bytes at 0x7fb5887b0dcd. RSP: 002b:00007fb58963ce78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007fb588815ef0 RCX: 00007fb5887b0df7 RDX: 00007ffedbc5b9b0 RSI: 00007ffedbc5bbf0 RDI: 00007ffedbc5cef5 RBP: 00007ffedbc5ba20 R08: 00007fb58963cf20 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 000055558020fa80 R13: 0000000000000100 R14: 00007ffedbc5b9d0 R15: 00007ffedbc5b780 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
