syzbot


general protection fault in qdisc_tree_reduce_backlog

Status: upstream: reported C repro on 2025/07/04 05:20
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+1261670bbdefc5485a06@syzkaller.appspotmail.com
Fix commit: ffdde7bf5a43 net/sched: Abort __tc_modify_qdisc if parent class does not exist
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci2-upstream-usb]
First crash: 15d, last: 2d03h
Cause bisection: introduced by (bisect log) :
commit 103406b38c600fec1fe375a77b27d87e314aea09
Author: Lion Ackermann <nnamrec@gmail.com>
Date: Mon Jun 30 13:27:30 2025 +0000

  net/sched: Always pass notifications when child class becomes empty

Crash: BUG: unable to handle kernel NULL pointer dereference in qdisc_tree_reduce_backlog (log)
Repro: C syz .config
  
Discussions (4)
Title Replies (including bot) Last reply
[PATCH net v2] net/sched: Abort __tc_modify_qdisc if parent class does not exist 2 (2) 2025/07/10 02:50
[PATCH net] net/sched: Abort __tc_modify_qdisc if parent class does not exist 4 (4) 2025/07/07 13:59
[PATCH] net/sched: Prevent notify to parent who unsupport class ops 6 (6) 2025/07/05 13:59
[syzbot] [net?] general protection fault in qdisc_tree_reduce_backlog 2 (7) 2025/07/05 09:12
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 general protection fault in qdisc_tree_reduce_backlog origin:lts 2 C 7 2d18h 2d18h 0/2 upstream: reported C repro on 2025/07/16 10:37
linux-6.1 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog origin:lts-only 8 C error 8 2d10h 8d06h 0/3 upstream: reported C repro on 2025/07/10 22:10
linux-6.6 general protection fault in qdisc_tree_reduce_backlog 2 1 2d10h 2d10h 0/2 upstream: reported on 2025/07/16 18:27
linux-5.15 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog origin:lts-only 8 C 10 2d14h 5d18h 0/3 upstream: reported C repro on 2025/07/13 10:38
Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/07/05 08:42 29m hdanton@sina.com patch net OK log
2025/07/04 07:25 22m hdanton@sina.com patch net OK log
2025/07/04 06:36 22m lizhi.xu@windriver.com patch net OK log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 0 UID: 0 PID: 5835 Comm: syz-executor374 Not tainted 6.16.0-rc3-syzkaller-00144-gbd475eeaaf3c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:qdisc_tree_reduce_backlog+0x223/0x480 net/sched/sch_api.c:806
Code: 89 ef e8 40 80 b3 f8 4d 89 ef 85 db 74 0d e8 74 fc 4f f8 4c 89 f5 e9 88 00 00 00 48 8b 6d 00 48 8d 45 20 48 89 c3 48 c1 eb 03 <42> 80 3c 33 00 48 89 04 24 74 0d 48 8b 3c 24 e8 09 80 b3 f8 48 8b
RSP: 0018:ffffc900040bf0a8 EFLAGS: 00010202
RAX: 0000000000000020 RBX: 0000000000000004 RCX: 0000000000000000
RDX: ffff888031da3c00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888031da3c00 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2
R13: ffff88802875a000 R14: dffffc0000000000 R15: ffff88802875a000
FS:  000055555b6b1380(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 00000000726c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fq_codel_change+0xa96/0xef0 net/sched/sch_fq_codel.c:450
 fq_codel_init+0x355/0x960 net/sched/sch_fq_codel.c:487
 qdisc_create+0x7ac/0xea0 net/sched/sch_api.c:1324
 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline]
 tc_modify_qdisc+0x1426/0x2010 net/sched/sch_api.c:1813
 rtnetlink_rcv_msg+0x779/0xb70 net/core/rtnetlink.c:6953
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:727
 ____sys_sendmsg+0x505/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
 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: 0033:0x7f79d710a6a9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff2ee70668 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fff2ee70838 RCX: 00007f79d710a6a9
RDX: 0000000000000800 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f79d717d610 R08: 0000000000000004 R09: 00007fff2ee70838
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff2ee70828 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qdisc_tree_reduce_backlog+0x223/0x480 net/sched/sch_api.c:806
Code: 89 ef e8 40 80 b3 f8 4d 89 ef 85 db 74 0d e8 74 fc 4f f8 4c 89 f5 e9 88 00 00 00 48 8b 6d 00 48 8d 45 20 48 89 c3 48 c1 eb 03 <42> 80 3c 33 00 48 89 04 24 74 0d 48 8b 3c 24 e8 09 80 b3 f8 48 8b
RSP: 0018:ffffc900040bf0a8 EFLAGS: 00010202
RAX: 0000000000000020 RBX: 0000000000000004 RCX: 0000000000000000
RDX: ffff888031da3c00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888031da3c00 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000000afff2
R13: ffff88802875a000 R14: dffffc0000000000 R15: ffff88802875a000
FS:  000055555b6b1380(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 00000000726c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 ef                	mov    %ebp,%edi
   2:	e8 40 80 b3 f8       	call   0xf8b38047
   7:	4d 89 ef             	mov    %r13,%r15
   a:	85 db                	test   %ebx,%ebx
   c:	74 0d                	je     0x1b
   e:	e8 74 fc 4f f8       	call   0xf84ffc87
  13:	4c 89 f5             	mov    %r14,%rbp
  16:	e9 88 00 00 00       	jmp    0xa3
  1b:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  1f:	48 8d 45 20          	lea    0x20(%rbp),%rax
  23:	48 89 c3             	mov    %rax,%rbx
  26:	48 c1 eb 03          	shr    $0x3,%rbx
* 2a:	42 80 3c 33 00       	cmpb   $0x0,(%rbx,%r14,1) <-- trapping instruction
  2f:	48 89 04 24          	mov    %rax,(%rsp)
  33:	74 0d                	je     0x42
  35:	48 8b 3c 24          	mov    (%rsp),%rdi
  39:	e8 09 80 b3 f8       	call   0xf8b38047
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Crashes (255):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/03 20:45 net bd475eeaaf3c 115ceea7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 17:57 upstream 8c2e52ebbe88 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in qdisc_tree_reduce_backlog
2025/07/09 22:54 upstream 8c2e52ebbe88 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in qdisc_tree_reduce_backlog
2025/07/09 09:26 upstream 733923397fd9 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 14:15 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in qdisc_tree_reduce_backlog
2025/07/08 11:19 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 08:13 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in qdisc_tree_reduce_backlog
2025/07/08 02:45 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 general protection fault in qdisc_tree_reduce_backlog
2025/07/10 08:42 upstream 8c2e52ebbe88 956bd956 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in qdisc_tree_reduce_backlog
2025/07/09 21:43 upstream 8c2e52ebbe88 956bd956 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in qdisc_tree_reduce_backlog
2025/07/09 13:26 upstream 733923397fd9 f4e5e155 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in qdisc_tree_reduce_backlog
2025/07/09 10:57 upstream 733923397fd9 f4e5e155 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in qdisc_tree_reduce_backlog
2025/07/08 23:41 upstream d006330be3f7 4d9fdfa4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in qdisc_tree_reduce_backlog
2025/07/08 15:40 upstream d7b8f8e20813 4d9fdfa4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in qdisc_tree_reduce_backlog
2025/07/08 19:06 upstream d006330be3f7 4d9fdfa4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in qdisc_tree_reduce_backlog
2025/07/08 18:04 upstream d006330be3f7 4d9fdfa4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in qdisc_tree_reduce_backlog
2025/07/09 18:23 net 3c78f91e82d6 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 15:39 net 3c78f91e82d6 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 12:16 net 3c78f91e82d6 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 10:27 net 3c78f91e82d6 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 08:26 net 3c78f91e82d6 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 07:25 net 3c78f91e82d6 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 06:22 net 3c78f91e82d6 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 04:40 net 80852774ba0a abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 02:15 net 80852774ba0a abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 16:18 net 80852774ba0a abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 08:57 net 1e3b66e32601 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/11 00:10 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 21:55 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 20:39 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 16:52 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 15:37 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 14:09 net-next c65d34296b22 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 10:54 net-next 6a971e48e2d8 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 05:52 net-next 6a971e48e2d8 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 04:32 net-next 6a971e48e2d8 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/10 00:43 net-next ea988b450690 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 20:38 net-next ea988b450690 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 19:35 net-next ea988b450690 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 01:59 net-next d23647fd547b abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 22:39 net-next d23647fd547b abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 21:07 net-next d23647fd547b abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/08 10:01 net-next 59f44c9ccc3b 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce general protection fault in qdisc_tree_reduce_backlog
2025/07/09 03:23 linux-next 58ba80c47402 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in qdisc_tree_reduce_backlog
2025/07/17 01:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 44f8051e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/16 12:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 c118d736 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/15 05:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/14 13:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/14 06:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/14 01:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/13 21:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/13 20:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/13 16:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/13 14:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/12 12:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/09 23:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
2025/07/09 10:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ec4801305969 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel paging request in qdisc_tree_reduce_backlog
* Struck through repros no longer work on HEAD.