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KASAN: slab-use-after-free Read in skb_queue_purge_reason (2)

Status: upstream: reported C repro on 2024/05/17 08:44
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+683f8cb11b94b1824c77@syzkaller.appspotmail.com
Fix commit: 5df5dafc171b Bluetooth: hci_uart: Fix another race during initialization
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm 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-bpf-next-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 ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 369d, last: 5d17h
Cause bisection: introduced by (bisect log) :
commit c411c62cc13319533b1861e00cedc4883c3bc1bb
Author: Arseniy Krasnov <avkrasnov@salutedevices.com>
Date: Thu Jan 30 18:43:26 2025 +0000

  Bluetooth: hci_uart: fix race during initialization

Crash: BUG: unable to handle kernel NULL pointer dereference in skb_queue_purge_reason (log)
Repro: C syz .config
  
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[RESEND PATCH v1] Bluetooth: hci_uart: fix race during initialization 1 (1) 2025/02/12 15:59
[PATCH v1] Bluetooth: hci_uart: fix race during initialization 1 (1) 2025/02/12 09:52
[syzbot] [bluetooth?] KASAN: slab-use-after-free Read in skb_queue_purge_reason (2) 5 (10) 2025/02/12 06:49
[syzbot] Monthly bluetooth report (Dec 2024) 0 (1) 2024/12/17 09:47
[syzbot] Monthly bluetooth report (Nov 2024) 0 (1) 2024/11/15 14:41
[syzbot] Monthly bluetooth report (Oct 2024) 0 (1) 2024/10/15 08:33
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-use-after-free Read in skb_queue_purge_reason bluetooth 1 507d 503d 0/28 auto-obsoleted due to no activity on 2024/03/26 16:32
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2025/02/12 06:49 24m avkrasnov@salutedevices.com patch linux-next OK log
2025/02/05 11:05 24m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master OK log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 5833 Comm: syz-executor346 Not tainted 6.14.0-rc1-next-20250204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:skb_queue_empty_lockless include/linux/skbuff.h:1887 [inline]
RIP: 0010:skb_queue_purge_reason+0xaa/0x500 net/core/skbuff.c:3936
Code: 89 44 24 78 42 c6 44 30 13 f3 e8 81 76 05 f8 48 8d bc 24 b0 00 00 00 ba 48 00 00 00 31 f6 e8 0d f2 6b f8 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 27 ef 6b f8 49 8b 45 00 4c 39 e8
RSP: 0018:ffffc90003d17880 EFLAGS: 00010202
RAX: ffffc90003d17930 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003d17978
RBP: ffffc90003d179f0 R08: ffffc90003d17977 R09: 0000000000000000
R10: ffffc90003d17930 R11: fffff520007a2f2f R12: dffffc0000000000
R13: 0000000000000008 R14: dffffc0000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055867393d608 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 skb_queue_purge include/linux/skbuff.h:3364 [inline]
 mrvl_close+0x8e/0x120 drivers/bluetooth/hci_mrvl.c:100
 hci_uart_tty_close+0x205/0x290 drivers/bluetooth/hci_ldisc.c:557
 tty_ldisc_kill+0xa3/0x1a0 drivers/tty/tty_ldisc.c:613
 tty_ldisc_release+0x1a1/0x200 drivers/tty/tty_ldisc.c:781
 tty_release_struct+0x2b/0xe0 drivers/tty/tty_io.c:1690
 tty_release+0xd06/0x12c0 drivers/tty/tty_io.c:1861
 __fput+0x3e9/0x9f0 fs/file_table.c:448
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2a/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f794f6cfc79
Code: Unable to access opcode bytes at 0x7f794f6cfc4f.
RSP: 002b:00007fff04322488 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f794f6cfc79
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 00007f794f74a270 R08: ffffffffffffffb8 R09: 00007fff043226a8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f794f74a270
R13: 0000000000000000 R14: 00007f794f74acc0 R15: 00007f794f6a1a60
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:skb_queue_empty_lockless include/linux/skbuff.h:1887 [inline]
RIP: 0010:skb_queue_purge_reason+0xaa/0x500 net/core/skbuff.c:3936
Code: 89 44 24 78 42 c6 44 30 13 f3 e8 81 76 05 f8 48 8d bc 24 b0 00 00 00 ba 48 00 00 00 31 f6 e8 0d f2 6b f8 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 27 ef 6b f8 49 8b 45 00 4c 39 e8
RSP: 0018:ffffc90003d17880 EFLAGS: 00010202
RAX: ffffc90003d17930 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003d17978
RBP: ffffc90003d179f0 R08: ffffc90003d17977 R09: 0000000000000000
R10: ffffc90003d17930 R11: fffff520007a2f2f R12: dffffc0000000000
R13: 0000000000000008 R14: dffffc0000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055867393d608 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 44 24 78          	mov    %eax,0x78(%rsp)
   4:	42 c6 44 30 13 f3    	movb   $0xf3,0x13(%rax,%r14,1)
   a:	e8 81 76 05 f8       	call   0xf8057690
   f:	48 8d bc 24 b0 00 00 	lea    0xb0(%rsp),%rdi
  16:	00
  17:	ba 48 00 00 00       	mov    $0x48,%edx
  1c:	31 f6                	xor    %esi,%esi
  1e:	e8 0d f2 6b f8       	call   0xf86bf230
  23:	4d 89 ef             	mov    %r13,%r15
  26:	49 c1 ef 03          	shr    $0x3,%r15
* 2a:	43 80 3c 37 00       	cmpb   $0x0,(%r15,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ef             	mov    %r13,%rdi
  34:	e8 27 ef 6b f8       	call   0xf86bef60
  39:	49 8b 45 00          	mov    0x0(%r13),%rax
  3d:	4c 39 e8             	cmp    %r13,%rax

Crashes (127):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/04 14:47 linux-next 40b8e93e17bf 8f267cef .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/05/07 05:25 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/02/11 08:16 upstream febbc555cf0f 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/02/01 02:03 upstream 69e858e0b8b2 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/18 14:10 upstream 595523945be0 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/12/11 04:01 upstream f92f4749861b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/07/12 15:28 upstream 43db1e03c086 eaeb5c15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/08/13 00:47 upstream d74da846046a 7b0f4b46 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/20 18:58 upstream 6fea5fabd332 2a20f901 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/17 02:20 upstream c62f4b82d571 a95239b1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/11 18:15 upstream 900241a5cc15 12ba9c21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/12/11 14:17 upstream f92f4749861b ff949d25 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/10 22:58 net 4d64321c4f6f 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/02 04:03 net f278b6d5bb46 c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/10 12:46 net 505ead7ab77f 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/05 22:29 net 3c9231ea6497 034534df .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/15 05:27 net 001ba0902046 7315a7cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/13 18:52 net 76201b597976 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/09 06:24 net f552b3037d0c f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/12/17 18:05 net 7ed2d9158877 c8c15bb2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/12/04 14:04 net af8edaeddbc5 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/05/16 11:00 net 621cde16e49b ef5d53ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2024/05/12 23:06 net 1164057b3c00 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/12 01:38 net-next 0b28182c73a3 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/11 13:48 net-next 0b28182c73a3 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/08 15:11 net-next 46431fd5224f dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/06 16:30 net-next 075001c9eb41 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/05/05 14:26 net-next 836b313a14a3 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/05 05:28 net-next 61f96e684edd 1c4febdb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/04/01 10:49 net-next 1a9239bb4253 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/30 22:33 net-next 1a9239bb4253 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/26 13:16 net-next a19f40d919ca 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/17 13:59 net-next bfc6c67ec2d6 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/15 21:29 net-next bfc6c67ec2d6 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/02/10 21:26 net-next 34c84b394890 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/02/09 01:39 net-next acdefab0dcbc ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/19 00:26 net-next 41c5d104f338 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/16 22:49 net-next 9eb8069d9940 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/14 18:59 net-next 9c7ad3563229 7315a7cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/13 02:18 net-next 7d0da8f86234 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/01/11 15:24 net-next 7b24f164cf00 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/03/01 19:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e056da87c780 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in skb_queue_purge_reason
2025/02/25 20:35 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/25 10:05 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/24 20:01 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/23 13:50 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/23 00:19 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/21 13:31 linux-next e5d3fd687aac 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/21 03:38 linux-next e5d3fd687aac 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/18 01:00 linux-next 253c82b3a2ce 9be4ace3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/16 17:53 linux-next 0ae0fa3bf0b4 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/16 03:48 linux-next 0ae0fa3bf0b4 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/16 02:20 linux-next 0ae0fa3bf0b4 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/15 14:32 linux-next 0ae0fa3bf0b4 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/14 14:41 linux-next 7b7a883c7f4d d9a046cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/12 05:29 linux-next df5d6180169a f2baddf5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/11 05:35 linux-next df5d6180169a 43f51a00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/09 19:06 linux-next ed58d103e6da ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/08 06:57 linux-next ed58d103e6da a4f327c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/05 23:32 linux-next ed88b8b82c53 577d049b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
2025/02/04 09:25 linux-next 40b8e93e17bf 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in skb_queue_purge_reason
* Struck through repros no longer work on HEAD.