possible deadlock in blkcg_deactivate_policy (2)

Status: upstream: reported on 2026/08/02 00:06
Subsystems: block cgroups
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+14254d81dd19ba7d7e41@syzkaller.appspotmail.com
First crash: 15d, last: 1d16h
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ID Workflow Result Correct Bug Created Started Finished Revision
34660068 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ✅ ❓ possible deadlock in blkcg_deactivate_policy (2) 2026/07/30 00:00 2026/07/30 00:00 2026/07/30 00:05 2377cd3d
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Title Replies (including bot) Last reply
[syzbot] [block?] [cgroups?] possible deadlock in blkcg_deactivate_policy (2) 1 (2) 2026/08/03 05:48
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in blkcg_deactivate_policy (2) origin:lts-only 4 syz, C inconclusive 3 941d 982d 0/3 upstream: reported C repro on 2023/12/04 11:30
linux-6.1 possible deadlock in blkcg_deactivate_policy 4 syz, C done 168 1205d 1251d 3/3 fixed on 2023/05/30 15:47
upstream possible deadlock in blkcg_deactivate_policy block cgroups 4 syz, C done error 93 1329d 1580d 0/29 auto-obsoleted due to no activity on 2023/05/12 00:27

Sample crash report:
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.5.6488/28484 is trying to acquire lock:
ffff888027963bc0 (&q->blkcg_mutex){+.+.}-{4:4}, at: blkcg_deactivate_policy+0x167/0x600 block/blk-cgroup.c:1681

but task is already holding lock:
ffff8880391818b8 (&eq->sysfs_lock){+.+.}-{4:4}, at: elevator_exit+0x88/0xf0 block/elevator.c:160

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (&eq->sysfs_lock){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
       elevator_exit+0x88/0xf0 block/elevator.c:160
       elevator_switch+0x3a7/0x7e0 block/elevator.c:580
       elevator_change+0x352/0x530 block/elevator.c:681
       elv_iosched_store+0x3be/0x460 block/elevator.c:826
       queue_attr_store+0x25f/0x2f0 block/blk-sysfs.c:906
       sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
       do_splice_from fs/splice.c:936 [inline]
       direct_splice_actor+0x192/0x690 fs/splice.c:1159
       splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
       do_splice_direct_actor fs/splice.c:1202 [inline]
       do_splice_direct+0x174/0x240 fs/splice.c:1228
       do_sendfile+0xadc/0xe20 fs/read_write.c:1371
       __do_sys_sendfile64 fs/read_write.c:1432 [inline]
       __se_sys_sendfile64 fs/read_write.c:1418 [inline]
       __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1418
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&q->elevator_lock){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
       elevator_change+0x1bc/0x530 block/elevator.c:679
       elv_iosched_store+0x3be/0x460 block/elevator.c:826
       queue_attr_store+0x25f/0x2f0 block/blk-sysfs.c:906
       sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       new_sync_write fs/read_write.c:595 [inline]
       vfs_write+0x6ac/0x1050 fs/read_write.c:687
       ksys_write+0x12a/0x250 fs/read_write.c:739
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&q->q_usage_counter(io)#17){++++}-{0:0}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       blk_alloc_queue+0x610/0x790 block/blk-core.c:504
       blk_mq_alloc_queue+0x174/0x290 block/blk-mq.c:4420
       __blk_mq_alloc_disk+0x29/0x120 block/blk-mq.c:4467
       loop_add+0x498/0xb60 drivers/block/loop.c:2041
       loop_init+0x1d3/0x200 drivers/block/loop.c:2280
       do_one_initcall+0x11d/0x700 init/main.c:1347
       do_initcall_level init/main.c:1409 [inline]
       do_initcalls init/main.c:1425 [inline]
       do_basic_setup init/main.c:1445 [inline]
       kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658
       kernel_init+0x1f/0x1e0 init/main.c:1548
       ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #2 (fs_reclaim){+.+.}-{0:0}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       __fs_reclaim_acquire mm/page_alloc.c:4329 [inline]
       fs_reclaim_acquire+0xc4/0x100 mm/page_alloc.c:4343
       might_alloc include/linux/sched/mm.h:317 [inline]
       prepare_alloc_pages+0x166/0x5f0 mm/page_alloc.c:5048
       __alloc_frozen_pages_noprof+0x1af/0x2dc0 mm/page_alloc.c:5293
       __alloc_pages_noprof+0xb/0x110 mm/page_alloc.c:5338
       __alloc_pages_node_noprof include/linux/gfp.h:291 [inline]
       alloc_pages_node_noprof include/linux/gfp.h:318 [inline]
       pcpu_alloc_pages mm/percpu-vm.c:95 [inline]
       pcpu_populate_chunk+0x118/0x990 mm/percpu-vm.c:285
       pcpu_alloc_noprof+0x881/0x1ca0 mm/percpu.c:1876
       xt_percpu_counter_alloc+0x13e/0x1b0 net/netfilter/x_tables.c:2137
       find_check_entry.isra.0+0xc2/0xa00 net/ipv6/netfilter/ip6_tables.c:545
       translate_table+0xc31/0x16c0 net/ipv6/netfilter/ip6_tables.c:733
       ip6t_register_table+0x106/0x2c0 net/ipv6/netfilter/ip6_tables.c:1749
       ip6table_raw_table_init+0x63/0x90 net/ipv6/netfilter/ip6table_raw.c:48
       xt_find_table_lock+0x2db/0x520 net/netfilter/x_tables.c:1353
       xt_request_find_table_lock+0x28/0xf0 net/netfilter/x_tables.c:1378
       get_info+0x1a7/0x770 net/ipv6/netfilter/ip6_tables.c:977
       do_ip6t_get_ctl+0x231/0xc30 net/ipv6/netfilter/ip6_tables.c:1669
       nf_getsockopt+0x7c/0xe0 net/netfilter/nf_sockopt.c:116
       ipv6_getsockopt+0x207/0x2a0 net/ipv6/ipv6_sockglue.c:1464
       tcp_getsockopt+0xa1/0x110 net/ipv4/tcp.c:4864
       do_sock_getsockopt+0x50a/0x6e0 net/socket.c:2474
       __sys_getsockopt+0x148/0x260 net/socket.c:2505
       __do_sys_getsockopt net/socket.c:2512 [inline]
       __se_sys_getsockopt net/socket.c:2509 [inline]
       __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2509
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (pcpu_alloc_mutex){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
       pcpu_alloc_noprof+0xe87/0x1ca0 mm/percpu.c:1788
       percpu_ref_init+0x37/0x3f0 lib/percpu-refcount.c:72
       blkg_alloc+0xf0/0xf80 block/blk-cgroup.c:313
       blkg_conf_prep+0x46e/0xf10 block/blk-cgroup.c:873
       tg_set_conf.isra.0+0x1ed/0x500 block/blk-throttle.c:1373
       cgroup_file_write+0x1e6/0x8a0 kernel/cgroup/cgroup.c:4337
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       new_sync_write fs/read_write.c:595 [inline]
       vfs_write+0x6ac/0x1050 fs/read_write.c:687
       ksys_write+0x12a/0x250 fs/read_write.c:739
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&q->blkcg_mutex){+.+.}-{4:4}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
       blkcg_deactivate_policy+0x167/0x600 block/blk-cgroup.c:1681
       bfq_exit_queue+0x29d/0x430 block/bfq-iosched.c:7165
       blk_mq_exit_sched+0x20e/0x4e0 block/blk-mq-sched.c:702
       elevator_exit+0x93/0xf0 block/elevator.c:161
       elevator_switch+0x3a7/0x7e0 block/elevator.c:580
       elevator_change+0x352/0x530 block/elevator.c:681
       elv_iosched_store+0x3be/0x460 block/elevator.c:826
       queue_attr_store+0x25f/0x2f0 block/blk-sysfs.c:906
       sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
       do_splice_from fs/splice.c:936 [inline]
       direct_splice_actor+0x192/0x690 fs/splice.c:1159
       splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
       do_splice_direct_actor fs/splice.c:1202 [inline]
       do_splice_direct+0x174/0x240 fs/splice.c:1228
       do_sendfile+0xadc/0xe20 fs/read_write.c:1371
       __do_sys_sendfile64 fs/read_write.c:1432 [inline]
       __se_sys_sendfile64 fs/read_write.c:1418 [inline]
       __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1418
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &q->blkcg_mutex --> &q->elevator_lock --> &eq->sysfs_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&eq->sysfs_lock);
                               lock(&q->elevator_lock);
                               lock(&eq->sysfs_lock);
  lock(&q->blkcg_mutex);

 *** DEADLOCK ***

8 locks held by syz.5.6488/28484:
 #0: ffff888045222450 (sb_writers#8){.+.+}-{0:0}, at: splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
 #1: ffff88803b3b3480 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x2c2/0x5f0 fs/kernfs/file.c:336
 #2: ffff888027c00968 (kn->active#79){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
 #2: ffff888027c00968 (kn->active#79){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x332/0x5f0 fs/kernfs/file.c:337
 #3: ffff888027a203a0 (&set->update_nr_hwq_lock){++++}-{4:4}, at: elv_iosched_store+0x2a0/0x460 block/elevator.c:821
 #4: ffff888027963840 (&q->q_usage_counter(io)#17){++++}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206
 #5: ffff888027963878 (&q->q_usage_counter(queue)){+.+.}-{0:0}, at: blk_mq_freeze_queue_nomemsave+0x15/0x20 block/blk-mq.c:206
 #6: ffff888027963d68 (&q->elevator_lock){+.+.}-{4:4}, at: elevator_change+0x1bc/0x530 block/elevator.c:679
 #7: ffff8880391818b8 (&eq->sysfs_lock){+.+.}-{4:4}, at: elevator_exit+0x88/0xf0 block/elevator.c:160

stack backtrace:
CPU: 0 UID: 0 PID: 28484 Comm: syz.5.6488 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
 blkcg_deactivate_policy+0x167/0x600 block/blk-cgroup.c:1681
 bfq_exit_queue+0x29d/0x430 block/bfq-iosched.c:7165
 blk_mq_exit_sched+0x20e/0x4e0 block/blk-mq-sched.c:702
 elevator_exit+0x93/0xf0 block/elevator.c:161
 elevator_switch+0x3a7/0x7e0 block/elevator.c:580
 elevator_change+0x352/0x530 block/elevator.c:681
 elv_iosched_store+0x3be/0x460 block/elevator.c:826
 queue_attr_store+0x25f/0x2f0 block/blk-sysfs.c:906
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 iter_file_splice_write+0x830/0x10b0 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x192/0x690 fs/splice.c:1159
 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x174/0x240 fs/splice.c:1228
 do_sendfile+0xadc/0xe20 fs/read_write.c:1371
 __do_sys_sendfile64 fs/read_write.c:1432 [inline]
 __se_sys_sendfile64 fs/read_write.c:1418 [inline]
 __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1418
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f021b99e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f021c8b2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f021bc25fa0 RCX: 00007f021b99e0d9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f021ba35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f021bc26038 R14: 00007f021bc25fa0 R15: 00007ffcd6d52878
 </TASK>

Crashes (25):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/11 13:30 upstream d58772d8520c 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/11 13:30 upstream d58772d8520c 37a258dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/08 05:44 upstream 9a143525f62b e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in blkcg_deactivate_policy
2026/08/05 07:26 upstream c21bb4193868 b3eac40e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/05 02:57 upstream c21bb4193868 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/05 02:51 upstream c21bb4193868 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/04 12:42 upstream 848acc8ffe1b d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/03 23:00 upstream c8e0d43058e6 a68cb31b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/03 17:40 upstream 075b74841bd0 a68cb31b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/03 13:02 upstream 075b74841bd0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/02 19:54 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/07/31 01:47 upstream 3708dd948844 aaffb173 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/07/29 05:59 upstream 3b5f4b83c4ab 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/07/28 15:46 upstream 62cc90241548 19622d9d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in blkcg_deactivate_policy
2026/08/07 00:02 upstream fcaeecb8b0cd c38879ea .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/08/04 08:18 upstream 848acc8ffe1b 9451e17e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/08/02 15:02 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/08/01 13:30 upstream 02dc699f83d0 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/08/01 06:10 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/07/31 05:16 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/07/31 02:15 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/07/30 23:25 upstream 3708dd948844 aaffb173 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/07/28 13:36 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in blkcg_deactivate_policy
2026/08/03 03:28 upstream bd1dde877520 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in blkcg_deactivate_policy
2026/07/28 13:57 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in blkcg_deactivate_policy
* Struck through repros no longer work on HEAD.