[v5.15] INFO: task hung in flush_commit_list
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syzbot
4:48 AM (7 hours ago) 4:48 AM
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Hello,
syzbot found the following issue on:
HEAD commit: 3330a8d33e08 Linux 5.15.201
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13129722580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=a6a6a2c789fe7debc6f5
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b65fe19af112/disk-3330a8d3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/351948519a0d/vmlinux-3330a8d3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3b3f8477595/bzImage-3330a8d3.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a6a6a2...@syzkaller.appspotmail.com
INFO: task kworker/0:15:4705 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:15 state:D stack:22864 pid: 4705 ppid: 2 flags:0x00004000
Workqueue: reiserfs/loop1 flush_async_commits
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline]
flush_commit_list+0x6e8/0x1d70 fs/reiserfs/journal.c:1005
flush_async_commits+0xa0/0xc0 fs/reiserfs/journal.c:3552
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
INFO: task syz.1.3219:16631 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3219 state:D stack:24688 pid:16631 ppid: 12391 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
lock_journal fs/reiserfs/journal.c:534 [inline]
do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
reiserfs_create+0x60b/0x690 fs/reiserfs/namei.c:695
lookup_open fs/namei.c:3470 [inline]
open_last_lookups fs/namei.c:3540 [inline]
path_openat+0x11db/0x2fa0 fs/namei.c:3747
do_filp_open+0x1e2/0x410 fs/namei.c:3777
do_sys_openat2+0x150/0x4b0 fs/open.c:1255
do_sys_open fs/open.c:1271 [inline]
__do_sys_openat fs/open.c:1287 [inline]
__se_sys_openat fs/open.c:1282 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1282
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4378717629
RSP: 002b:00007f4376950028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4378991090 RCX: 00007f4378717629
RDX: 000000000000275a RSI: 0000200000000540 RDI: ffffffffffffff9c
RBP: 00007f43787adb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4378991128 R14: 00007f4378991090 R15: 00007ffe47a95478
</TASK>
INFO: task syz.1.3219:16634 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3219 state:D stack:27992 pid:16634 ppid: 12391 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline]
lock_journal fs/reiserfs/journal.c:534 [inline]
do_journal_end+0x30e/0x42d0 fs/reiserfs/journal.c:4025
reiserfs_sync_fs+0xe9/0x170 fs/reiserfs/super.c:78
sync_filesystem+0xe6/0x220 fs/sync.c:56
reiserfs_remount+0x14f/0x14f0 fs/reiserfs/super.c:1447
reconfigure_super+0x219/0x8a0 fs/super.c:938
do_remount fs/namespace.c:2697 [inline]
path_mount+0xd54/0x1030 fs/namespace.c:3356
do_mount fs/namespace.c:3377 [inline]
__do_sys_mount fs/namespace.c:3585 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4378717629
RSP: 002b:00007f437692f028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4378991180 RCX: 00007f4378717629
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f43787adb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002200020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4378991218 R14: 00007f4378991180 R15: 00007ffe47a95478
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by dhcpcd/3853:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x258/0x1a70 net/ipv4/devinet.c:1076
2 locks held by getty/3948:
#0: ffff88814c984098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
4 locks held by kworker/0:15/4705:
#0: ffff888061d69138 ((wq_completion)reiserfs/loop1){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000348fd00 ((work_completion)(&(&journal->j_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffff888027c34890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffff888027c34890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x6de/0x1d70 fs/reiserfs/journal.c:1005
#3: ffff88801f08e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by kworker/1:17/5739:
#0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc90003e7fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
3 locks held by kworker/u4:10/6754:
#0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000303fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by syz.1.3219/16589:
3 locks held by syz.1.3219/16631:
#0: ffff888027ee6460 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline]
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: path_openat+0x803/0x2fa0 fs/namei.c:3747
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
3 locks held by syz.1.3219/16634:
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: do_remount fs/namespace.c:2694 [inline]
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: path_mount+0xd0e/0x1030 fs/namespace.c:3356
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#2: ffff88801f08e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
1 lock held by syz.3.4005/20115:
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
1 lock held by syz.4.4080/20398:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x88f/0xa70 net/core/dev.c:10709
2 locks held by syz.8.4076/20422:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
#1: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
1 lock held by syz.2.4084/20440:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
1 lock held by syz.2.4084/20444:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
1 lock held by syz.2.4084/20446:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1619 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:find_stack lib/stackdepot.c:209 [inline]
RIP: 0010:stack_depot_save+0x16a/0x440 lib/stackdepot.c:280
Code: b4 c2 5a 12 41 89 ee 41 81 e6 ff ff 0f 00 4f 8b 7c f5 00 4d 85 ff 74 58 89 d9 eb 08 4d 8b 3f 4d 85 ff 74 4c 41 39 6f 08 75 f2 <41> 39 5f 0c 75 ec 31 f6 4c 8b 04 f7 4d 3b 44 f7 18 75 df 48 ff c6
RSP: 0018:ffffc90006497510 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000000009
RDX: 0000000000000b20 RSI: 0000000077be595b RDI: ffffc90006497570
RBP: 00000000aa21eed4 R08: 000000002a73506c R09: 0000000000000003
R10: 000000000047d4e8 R11: 000000005b90a843 R12: ffff888060799c00
R13: ffff88823b000000 R14: 000000000001eed4 R15: ffff888060847e90
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000005d1be000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000001800
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xcc/0xf0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:612 [inline]
kzalloc include/linux/slab.h:738 [inline]
ieee802_11_parse_elems_crc+0xb3/0x10b0 net/mac80211/util.c:1478
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2243 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x370/0x2ab0 net/mac80211/ibss.c:1643
ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline]
ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513
cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
---
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 syzk...@googlegroups.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
syzbot found the following issue on:
HEAD commit: 3330a8d33e08 Linux 5.15.201
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13129722580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=a6a6a2c789fe7debc6f5
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b65fe19af112/disk-3330a8d3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/351948519a0d/vmlinux-3330a8d3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a3b3f8477595/bzImage-3330a8d3.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a6a6a2...@syzkaller.appspotmail.com
INFO: task kworker/0:15:4705 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:15 state:D stack:22864 pid: 4705 ppid: 2 flags:0x00004000
Workqueue: reiserfs/loop1 flush_async_commits
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline]
flush_commit_list+0x6e8/0x1d70 fs/reiserfs/journal.c:1005
flush_async_commits+0xa0/0xc0 fs/reiserfs/journal.c:3552
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
INFO: task syz.1.3219:16631 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3219 state:D stack:24688 pid:16631 ppid: 12391 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
lock_journal fs/reiserfs/journal.c:534 [inline]
do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
reiserfs_create+0x60b/0x690 fs/reiserfs/namei.c:695
lookup_open fs/namei.c:3470 [inline]
open_last_lookups fs/namei.c:3540 [inline]
path_openat+0x11db/0x2fa0 fs/namei.c:3747
do_filp_open+0x1e2/0x410 fs/namei.c:3777
do_sys_openat2+0x150/0x4b0 fs/open.c:1255
do_sys_open fs/open.c:1271 [inline]
__do_sys_openat fs/open.c:1287 [inline]
__se_sys_openat fs/open.c:1282 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1282
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4378717629
RSP: 002b:00007f4376950028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4378991090 RCX: 00007f4378717629
RDX: 000000000000275a RSI: 0000200000000540 RDI: ffffffffffffff9c
RBP: 00007f43787adb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4378991128 R14: 00007f4378991090 R15: 00007ffe47a95478
</TASK>
INFO: task syz.1.3219:16634 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3219 state:D stack:27992 pid:16634 ppid: 12391 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537
__mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:815 [inline]
lock_journal fs/reiserfs/journal.c:534 [inline]
do_journal_end+0x30e/0x42d0 fs/reiserfs/journal.c:4025
reiserfs_sync_fs+0xe9/0x170 fs/reiserfs/super.c:78
sync_filesystem+0xe6/0x220 fs/sync.c:56
reiserfs_remount+0x14f/0x14f0 fs/reiserfs/super.c:1447
reconfigure_super+0x219/0x8a0 fs/super.c:938
do_remount fs/namespace.c:2697 [inline]
path_mount+0xd54/0x1030 fs/namespace.c:3356
do_mount fs/namespace.c:3377 [inline]
__do_sys_mount fs/namespace.c:3585 [inline]
__se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4378717629
RSP: 002b:00007f437692f028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4378991180 RCX: 00007f4378717629
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f43787adb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000002200020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4378991218 R14: 00007f4378991180 R15: 00007ffe47a95478
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by dhcpcd/3853:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x258/0x1a70 net/ipv4/devinet.c:1076
2 locks held by getty/3948:
#0: ffff88814c984098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
4 locks held by kworker/0:15/4705:
#0: ffff888061d69138 ((wq_completion)reiserfs/loop1){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000348fd00 ((work_completion)(&(&journal->j_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffff888027c34890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffff888027c34890 (&jl->j_commit_mutex){+.+.}-{3:3}, at: flush_commit_list+0x6de/0x1d70 fs/reiserfs/journal.c:1005
#3: ffff88801f08e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
2 locks held by kworker/1:17/5739:
#0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc90003e7fd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
3 locks held by kworker/u4:10/6754:
#0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000303fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
3 locks held by syz.1.3219/16589:
3 locks held by syz.1.3219/16631:
#0: ffff888027ee6460 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline]
#1: ffff88805f9c02e0 (&type->i_mutex_dir_key#13){+.+.}-{3:3}, at: path_openat+0x803/0x2fa0 fs/namei.c:3747
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
3 locks held by syz.1.3219/16634:
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: do_remount fs/namespace.c:2694 [inline]
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: path_mount+0xd0e/0x1030 fs/namespace.c:3356
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:814 [inline]
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#1: ffffc900042490f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x304/0x42d0 fs/reiserfs/journal.c:4025
#2: ffff88801f08e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
1 lock held by syz.3.4005/20115:
#0: ffff888027ee60e0 (&type->s_umount_key#79){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
1 lock held by syz.4.4080/20398:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x88f/0xa70 net/core/dev.c:10709
2 locks held by syz.8.4076/20422:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
#1: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8c323528 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
1 lock held by syz.2.4084/20440:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
1 lock held by syz.2.4084/20444:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
1 lock held by syz.2.4084/20446:
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d43c848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ee/0xf30 net/core/rtnetlink.c:5681
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1619 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:find_stack lib/stackdepot.c:209 [inline]
RIP: 0010:stack_depot_save+0x16a/0x440 lib/stackdepot.c:280
Code: b4 c2 5a 12 41 89 ee 41 81 e6 ff ff 0f 00 4f 8b 7c f5 00 4d 85 ff 74 58 89 d9 eb 08 4d 8b 3f 4d 85 ff 74 4c 41 39 6f 08 75 f2 <41> 39 5f 0c 75 ec 31 f6 4c 8b 04 f7 4d 3b 44 f7 18 75 df 48 ff c6
RSP: 0018:ffffc90006497510 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000000009
RDX: 0000000000000b20 RSI: 0000000077be595b RDI: ffffc90006497570
RBP: 00000000aa21eed4 R08: 000000002a73506c R09: 0000000000000003
R10: 000000000047d4e8 R11: 000000005b90a843 R12: ffff888060799c00
R13: ffff88823b000000 R14: 000000000001eed4 R15: ffff888060847e90
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000005d1be000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000001800
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kasan_save_stack mm/kasan/common.c:40 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc+0xcc/0xf0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:612 [inline]
kzalloc include/linux/slab.h:738 [inline]
ieee802_11_parse_elems_crc+0xb3/0x10b0 net/mac80211/util.c:1478
ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2243 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x370/0x2ab0 net/mac80211/ibss.c:1643
ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline]
ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513
cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
---
This report is generated by a bot. It may contain errors.
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