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Message-ID: <0000000000008df61a061dfb2366@google.com> Date: Wed, 24 Jul 2024 02:45:30 -0700 From: syzbot <syzbot+3880fb06c3b7f5ec1878@...kaller.appspotmail.com> To: cake@...ts.bufferbloat.net, davem@...emloft.net, edumazet@...gle.com, jhs@...atatu.com, jiri@...nulli.us, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, toke@...e.dk, xiyou.wangcong@...il.com Subject: [syzbot] [net?] WARNING in cake_dequeue (2) Hello, syzbot found the following issue on: HEAD commit: 7846b618e0a4 Merge tag 'rtc-6.11' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12b09fe9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f4925140c45a2a50 dashboard link: https://syzkaller.appspot.com/bug?extid=3880fb06c3b7f5ec1878 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1367075cbd79/disk-7846b618.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f252a22f2003/vmlinux-7846b618.xz kernel image: https://storage.googleapis.com/syzbot-assets/23bea0ad3ab6/bzImage-7846b618.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3880fb06c3b7f5ec1878@...kaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 22566 at net/sched/sch_cake.c:2094 cake_dequeue+0x2af1/0x4690 net/sched/sch_cake.c:2094 Modules linked in: CPU: 0 PID: 22566 Comm: syz.3.4579 Not tainted 6.10.0-syzkaller-11323-g7846b618e0a4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:cake_dequeue+0x2af1/0x4690 net/sched/sch_cake.c:2094 Code: 74 08 4c 89 f7 e8 af d7 6b f8 4d 89 26 eb 05 e8 75 e1 08 f8 45 31 f6 4c 8b a4 24 08 01 00 00 e9 d4 de ff ff e8 60 e1 08 f8 90 <0f> 0b 90 48 8b 94 24 f0 00 00 00 48 89 d0 48 c1 e8 03 42 0f b6 04 RSP: 0018:ffffc900000079c0 EFLAGS: 00010246 RAX: ffffffff898a6160 RBX: 000000000000ffff RCX: ffff888067efda00 RDX: 0000000080000101 RSI: 000000000000ffff RDI: 0000000000000400 RBP: ffffc90000007c28 R08: ffffffff898a5f7c R09: ffffffff898a69e5 R10: 0000000000000003 R11: ffff888067efda00 R12: ffff88805a900010 R13: dffffc0000000000 R14: 000000000000ffff R15: ffff88805a900000 FS: 00007f3db68136c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3141fffc CR3: 0000000073d06000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x272/0x2170 net/sched/sch_generic.c:416 qdisc_run+0xda/0x270 include/net/pkt_sched.h:127 net_tx_action+0x89c/0xa50 net/core/dev.c:5322 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 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:stack_trace_save+0x0/0x1d0 kernel/stacktrace.c:114 Code: 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 0f 0b 90 45 31 e4 eb e1 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 RSP: 0018:ffffc9000a016db8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888067efdf80 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000010 RDI: ffffc9000a016e00 RBP: ffffc9000a016ef0 R08: ffffffff82005562 R09: 0000000000000000 R10: ffffc9000a016e00 R11: fffff52001402dd0 R12: dffffc0000000000 R13: 1ffff92001402dbc R14: ffffc9000a016e00 R15: 1ffff1100cfdfbf0 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __set_page_owner+0x92/0x800 mm/page_owner.c:320 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 vma_alloc_folio_noprof+0xf3/0x1f0 mm/mempolicy.c:2304 folio_prealloc+0x31/0x170 alloc_anon_folio mm/memory.c:4397 [inline] do_anonymous_page mm/memory.c:4455 [inline] do_pte_missing mm/memory.c:3895 [inline] handle_pte_fault+0x257b/0x7090 mm/memory.c:5381 __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0xfb0/0x19d0 mm/memory.c:5689 faultin_page mm/gup.c:1305 [inline] __get_user_pages+0x6ec/0x16a0 mm/gup.c:1604 populate_vma_page_range+0x264/0x330 mm/gup.c:2043 __mm_populate+0x27a/0x460 mm/gup.c:2146 mm_populate include/linux/mm.h:3469 [inline] vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:593 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: 0033:0x7f3db5975b59 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:00007f3db6813048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f3db5b05f60 RCX: 00007f3db5975b59 RDX: 000000000000000f RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f3db59e4e5d R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000004008032 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000004d R14: 00007f3db5b05f60 R15: 00007ffc8713fc48 </TASK> ---------------- Code disassembly (best guess): 0: 5d pop %rbp 1: 41 5e pop %r14 3: 41 5f pop %r15 5: 5d pop %rbp 6: c3 ret 7: cc int3 8: cc int3 9: cc int3 a: cc int3 b: 90 nop c: 0f 0b ud2 e: 90 nop f: 45 31 e4 xor %r12d,%r12d 12: eb e1 jmp 0xfffffff5 14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 55 push %rbp 2f: 48 89 e5 mov %rsp,%rbp 32: 41 57 push %r15 34: 41 56 push %r14 36: 41 55 push %r13 38: 41 54 push %r12 3a: 53 push %rbx 3b: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp 3f: 48 rex.W --- 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@...glegroups.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
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