syzbot


KASAN: use-after-free Read in __cpuhp_state_remove_instance

Status: fixed on 2021/04/19 22:36
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+38769495e847cea2dcca@syzkaller.appspotmail.com
Fix commit: 470ec4ed8c91 io-wq: fix double put of 'wq' in error path
First crash: 1202d, last: 1181d
Cause bisection: introduced by (bisect log) [merge commit]:
commit 27131549060ee87f1c50c56539b8f6c4c1a4acec
Author: Jens Axboe <axboe@kernel.dk>
Date: Mon Feb 22 00:22:53 2021 +0000

  Merge branch 'for-5.12/io_uring' into io_uring-worker.v3

Crash: SYZFAIL: wrong response packet (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) :
commit 470ec4ed8c91b4db398ad607c700e9ce88365202
Author: Jens Axboe <axboe@kernel.dk>
Date: Fri Feb 26 17:20:34 2021 +0000

  io-wq: fix double put of 'wq' in error path

  
Discussions (1)
Title Replies (including bot) Last reply
KASAN: use-after-free Read in __cpuhp_state_remove_instance 3 (7) 2021/04/19 17:51
Last patch testing requests (1)
Created Duration User Patch Repo Result
2021/03/14 08:27 16m ducheng2@gmail.com linux-next OK

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:835 [inline]
BUG: KASAN: use-after-free in hlist_del include/linux/list.h:852 [inline]
BUG: KASAN: use-after-free in __cpuhp_state_remove_instance+0x58b/0x5b0 kernel/cpu.c:2002
Read of size 8 at addr ffff888013928898 by task syz-executor929/8420

CPU: 1 PID: 8420 Comm: syz-executor929 Not tainted 5.11.0-next-20210226-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0xfa/0x151 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 __hlist_del include/linux/list.h:835 [inline]
 hlist_del include/linux/list.h:852 [inline]
 __cpuhp_state_remove_instance+0x58b/0x5b0 kernel/cpu.c:2002
 cpuhp_state_remove_instance_nocalls include/linux/cpuhotplug.h:407 [inline]
 io_wq_create+0x6ca/0xbf0 fs/io-wq.c:1056
 io_init_wq_offload fs/io_uring.c:7792 [inline]
 io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811
 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773
 io_uring_install_fd fs/io_uring.c:9381 [inline]
 io_uring_create fs/io_uring.c:9532 [inline]
 io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43eec9
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff25216ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043eec9
RDX: 000000000043eec9 RSI: 0000000020000040 RDI: 00000000000074c1
RBP: 0000000000402eb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402f40
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488

Allocated by task 8420:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:427 [inline]
 ____kasan_kmalloc mm/kasan/common.c:506 [inline]
 ____kasan_kmalloc mm/kasan/common.c:465 [inline]
 __kasan_kmalloc+0x99/0xc0 mm/kasan/common.c:515
 kmalloc include/linux/slab.h:554 [inline]
 kzalloc include/linux/slab.h:684 [inline]
 io_wq_create+0xc0/0xbf0 fs/io-wq.c:1002
 io_init_wq_offload fs/io_uring.c:7792 [inline]
 io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811
 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773
 io_uring_install_fd fs/io_uring.c:9381 [inline]
 io_uring_create fs/io_uring.c:9532 [inline]
 io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 8420:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
 ____kasan_slab_free mm/kasan/common.c:360 [inline]
 ____kasan_slab_free mm/kasan/common.c:325 [inline]
 __kasan_slab_free+0xf5/0x130 mm/kasan/common.c:367
 kasan_slab_free include/linux/kasan.h:199 [inline]
 slab_free_hook mm/slub.c:1562 [inline]
 slab_free_freelist_hook+0x72/0x1b0 mm/slub.c:1600
 slab_free mm/slub.c:3161 [inline]
 kfree+0xe5/0x7b0 mm/slub.c:4213
 io_wq_destroy fs/io-wq.c:1091 [inline]
 io_wq_put+0x4d0/0x6d0 fs/io-wq.c:1098
 io_wq_create+0x92d/0xbf0 fs/io-wq.c:1053
 io_init_wq_offload fs/io_uring.c:7792 [inline]
 io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811
 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773
 io_uring_install_fd fs/io_uring.c:9381 [inline]
 io_uring_create fs/io_uring.c:9532 [inline]
 io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345
 insert_work+0x48/0x370 kernel/workqueue.c:1331
 __queue_work+0x5c1/0xf00 kernel/workqueue.c:1497
 queue_work_on+0xae/0xc0 kernel/workqueue.c:1524
 queue_work include/linux/workqueue.h:507 [inline]
 call_usermodehelper_exec+0x1f0/0x4c0 kernel/umh.c:433
 kobject_uevent_env+0xf9f/0x1680 lib/kobject_uevent.c:617
 kobject_synth_uevent+0x701/0x850 lib/kobject_uevent.c:208
 uevent_store+0x42/0x90 drivers/base/bus.c:585
 drv_attr_store+0x6d/0xa0 drivers/base/bus.c:77
 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write+0x426/0x650 fs/read_write.c:519
 vfs_write+0x796/0xa30 fs/read_write.c:606
 ksys_write+0x12d/0x250 fs/read_write.c:659
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Second to last potentially related work creation:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345
 insert_work+0x48/0x370 kernel/workqueue.c:1331
 __queue_work+0x5c1/0xf00 kernel/workqueue.c:1497
 queue_work_on+0xae/0xc0 kernel/workqueue.c:1524
 queue_work include/linux/workqueue.h:507 [inline]
 call_usermodehelper_exec+0x1f0/0x4c0 kernel/umh.c:433
 kobject_uevent_env+0xf9f/0x1680 lib/kobject_uevent.c:617
 kernel_add_sysfs_param kernel/params.c:798 [inline]
 param_sysfs_builtin kernel/params.c:833 [inline]
 param_sysfs_init+0x3bf/0x498 kernel/params.c:952
 do_one_initcall+0x103/0x650 init/main.c:1226
 do_initcall_level init/main.c:1299 [inline]
 do_initcalls init/main.c:1315 [inline]
 do_basic_setup init/main.c:1335 [inline]
 kernel_init_freeable+0x5ff/0x683 init/main.c:1536
 kernel_init+0xd/0x1b8 init/main.c:1424
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the object at ffff888013928800
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 152 bytes inside of
 192-byte region [ffff888013928800, ffff8880139288c0)
The buggy address belongs to the page:
page:00000000bd6bb1df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13928
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 0000000000000000 0000000c00000001 ffff888010841a00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888013928780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888013928800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888013928880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                            ^
 ffff888013928900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888013928980: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (2726):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/02/26 22:49 linux-next d01f2f7e3557 4c37c133 .config console log report syz C ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/05 09:31 upstream cee407c5cc42 9d751681 .config console log report syz ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/04 12:57 upstream f69d02e37a85 d7e4e604 .config console log report syz ci-upstream-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/04 12:40 upstream f69d02e37a85 d7e4e604 .config console log report syz ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/04 03:03 upstream f69d02e37a85 06ed56cd .config console log report syz ci-upstream-kasan-gce-selinux-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/03 15:20 upstream f69d02e37a85 e5b64d68 .config console log report syz ci-upstream-kasan-gce KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/02 16:42 upstream 7a7fd0de4a98 92ead296 .config console log report syz ci-upstream-kasan-gce KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/01 05:23 upstream cd278456d4ca 4c37c133 .config console log report syz ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/01 04:55 upstream cd278456d4ca 4c37c133 .config console log report syz ci-upstream-kasan-gce-selinux-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/28 14:28 upstream 5695e5161974 4c37c133 .config console log report syz ci-upstream-kasan-gce KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/28 02:05 upstream 5695e5161974 4c37c133 .config console log report syz ci-upstream-kasan-gce-selinux-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/28 01:21 upstream 5695e5161974 4c37c133 .config console log report syz ci-upstream-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/28 00:40 linux-next d01f2f7e3557 4c37c133 .config console log report syz ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/27 03:03 linux-next d01f2f7e3557 4c37c133 .config console log report syz ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 22:35 linux-next d01f2f7e3557 4c37c133 .config console log report syz ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 21:47 linux-next d01f2f7e3557 4c37c133 .config console log report syz ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 21:32 linux-next d01f2f7e3557 4c37c133 .config console log report syz ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/19 23:21 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/19 19:58 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/19 18:36 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/19 17:26 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/16 03:11 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/16 00:16 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 19:07 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 17:27 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 14:54 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 11:34 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 02:42 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 01:38 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 01:22 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 19:04 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 18:05 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 07:50 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 04:53 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 03:41 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 02:30 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 02:03 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/13 20:34 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/06 08:03 upstream 280d542f6ffa 56722561 .config console log report info ci-upstream-kasan-gce KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/06 06:24 upstream 280d542f6ffa 56722561 .config console log report info ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/06 02:46 upstream 280d542f6ffa 56722561 .config console log report info ci-upstream-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/05 18:30 upstream 280d542f6ffa 9d751681 .config console log report info ci-upstream-kasan-gce-selinux-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/20 00:42 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/19 19:46 upstream 280d542f6ffa 3d01c4de .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/16 01:23 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 23:01 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 20:55 upstream 280d542f6ffa fdb2bb2c .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 14:13 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 13:05 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 09:35 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 07:33 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/15 00:19 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 22:54 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 21:53 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 21:20 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 20:13 upstream 280d542f6ffa cc1cff8f .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 16:32 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 15:32 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 14:31 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 12:59 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 11:20 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 11:15 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 09:07 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 06:48 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/14 00:26 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/13 21:46 upstream 280d542f6ffa 4a003785 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/05 15:18 upstream 280d542f6ffa 9d751681 .config console log report info ci-qemu2-arm64 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/05 14:18 upstream 280d542f6ffa 9d751681 .config console log report info ci-upstream-kasan-gce-386 KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/01 20:04 linux-next 26ada2d1f143 183afb6c .config console log report info ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 09:39 linux-next d01f2f7e3557 76f7fc95 .config console log report info ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 09:28 linux-next d01f2f7e3557 76f7fc95 .config console log report info ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/02/26 09:27 linux-next d01f2f7e3557 76f7fc95 .config console log report info ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in __cpuhp_state_remove_instance
2021/03/06 03:55 upstream 280d542f6ffa 4a024a9b .config console log report info ci-qemu2-arm64-mte KASAN: invalid-access Read in __cpuhp_state_remove_instance
2021/03/06 03:46 upstream 280d542f6ffa 4a024a9b .config console log report info ci-qemu2-arm64-mte KASAN: invalid-access Read in __cpuhp_state_remove_instance
* Struck through repros no longer work on HEAD.