INFO: task kworker/1:3:5756 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3 state:D stack:21752 pid:5756 ppid:2 flags:0x00004000
Workqueue: gfs2_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
io_schedule+0x80/0xd0 kernel/sched/core.c:9023
folio_wait_bit_common+0x714/0xfa0 mm/filemap.c:1329
folio_wait_locked include/linux/pagemap.h:1149 [inline]
gfs2_jhead_process_page+0x17e/0x720 fs/gfs2/lops.c:477
gfs2_find_jhead+0xbe5/0xd20 fs/gfs2/lops.c:594
gfs2_recover_func+0x708/0x1d20 fs/gfs2/recovery.c:460
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task syz.0.1096:10167 blocked for more than 146 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1096 state:D stack:25008 pid:10167 ppid:5767 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:199
__wait_on_bit+0xac/0x2d0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_recover_journal+0xda/0x130 fs/gfs2/recovery.c:577
init_journal+0x17d6/0x2330 fs/gfs2/ops_fstype.c:833
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:886
gfs2_fill_super+0x17bc/0x1f30 fs/gfs2/ops_fstype.c:1266
get_tree_bdev+0x3f3/0x520 fs/super.c:1591
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1344
vfs_get_tree+0x8c/0x280 fs/super.c:1764
do_new_mount+0x24b/0xa40 fs/namespace.c:3386
do_mount fs/namespace.c:3726 [inline]
__do_sys_mount fs/namespace.c:3935 [inline]
__se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa87a79e04a
RSP: 002b:00007fa87b716e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa87b716ee0 RCX: 00007fa87a79e04a
RDX: 0000200000037f40 RSI: 00002000000008c0 RDI: 00007fa87b716ea0
RBP: 0000200000037f40 R08: 00007fa87b716ee0 R09: 0000000001010084
R10: 0000000001010084 R11: 0000000000000246 R12: 00002000000008c0
R13: 00007fa87b716ea0 R14: 0000000000037f45 R15: 0000200000000480
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
4 locks held by kworker/u4:6/1127:
2 locks held by getty/5527:
#0: ffff88802da2c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x433/0x1390 drivers/tty/n_tty.c:2217
2 locks held by kworker/1:3/5756:
#0: ffff8881406f3938 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
#0: ffff8881406f3938 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730
#1: ffffc90003d57d00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
#1: ffffc90003d57d00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730
1 lock held by syz-executor/5771:
1 lock held by syz.0.1096/10167:
#0: ffff88807b00a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807b00a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807b00a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: get_tree_bdev+0x353/0x520 fs/super.c:1589
4 locks held by syz-executor/10543:
1 lock held by sed/11677:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf3d/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10543 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:_compound_head include/linux/page-flags.h:248 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:684 [inline]
RIP: 0010:PageAnonExclusive include/linux/page-flags.h:1048 [inline]
RIP: 0010:page_try_dup_anon_rmap+0xbf/0x1270 include/linux/rmap.h:254
Code: f6 c4 01 0f 84 0a 08 00 00 42 80 7c 2d 00 00 74 08 4c 89 f7 e8 d2 0c 14 00 4d 8b 26 4c 89 e6 48 83 e6 01 31 ff e8 71 d9 bb ff <4c> 89 e0 48 83 e0 01 0f 85 b5 06 00 00 0f 1f 44 00 00 e8 1a d5 bb
RSP: 0018:ffffc90003e074d8 EFLAGS: 00000293
RAX: ffffffff81cb4ccf RBX: ffffea0001598540 RCX: ffff888079418000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffd40002b30a9 R08: ffffea0001598577 R09: 1ffffd40002b30ae
R10: dffffc0000000000 R11: fffff940002b30af R12: ffffea0001688d88
R13: dffffc0000000000 R14: ffffea0001598548 R15: ffff88802f328200
FS: 00005555593f4500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61b9b84368 CR3: 00000000623ae000 CR4: 00000000003506e0
Call Trace:
copy_present_pte mm/memory.c:945 [inline]
copy_pte_range mm/memory.c:1083 [inline]
copy_pmd_range mm/memory.c:1168 [inline]
copy_pud_range mm/memory.c:1205 [inline]
copy_p4d_range mm/memory.c:1229 [inline]
copy_page_range+0x12d2/0x3670 mm/memory.c:1323
dup_mmap kernel/fork.c:768 [inline]
dup_mm kernel/fork.c:1693 [inline]
copy_mm+0x1281/0x1d80 kernel/fork.c:1742
copy_process+0x16f7/0x3d80 kernel/fork.c:2507
kernel_clone+0x24b/0x8a0 kernel/fork.c:2915
__do_sys_clone kernel/fork.c:3058 [inline]
__se_sys_clone kernel/fork.c:3042 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:3042
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd50f9c5852
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007fffcb3e7f00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fffcb3e7f00 RCX: 00007fd50f9c5852
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fffcb3e808c R08: 0000000000000000 R09: 0000000000000001
R10: 00005555593f47d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000a384e R15: 00007fffcb3e80e0