[v6.1] INFO: task hung in gfs2_recover_journal

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Mar 1, 2024, 10:26:26 AMMar 1
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Hello,

syzbot found the following issue on:

HEAD commit: a3eb3a74aa8c Linux 6.1.80
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14ebcc6a180000
kernel config: https://syzkaller.appspot.com/x/.config?x=40fd5f1c69352c2d
dashboard link: https://syzkaller.appspot.com/bug?extid=515c30bd436200da1f0a
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fcf176340788/disk-a3eb3a74.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/31d4ae9bb2ff/vmlinux-a3eb3a74.xz
kernel image: https://storage.googleapis.com/syzbot-assets/cb907876b80a/Image-a3eb3a74.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+515c30...@syzkaller.appspotmail.com

INFO: task syz-executor.2:8142 blocked for more than 144 seconds.
Not tainted 6.1.80-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:0 pid:8142 ppid:4259 flags:0x0000000d
Call trace:
__switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0xee4/0x1c98 kernel/sched/core.c:6558
schedule+0xc4/0x170 kernel/sched/core.c:6634
bit_wait+0x1c/0xac kernel/sched/wait_bit.c:199
__wait_on_bit kernel/sched/wait_bit.c:49 [inline]
out_of_line_wait_on_bit+0x208/0x334 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_recover_journal+0xd8/0x150 fs/gfs2/recovery.c:577
init_journal+0x14ac/0x2054 fs/gfs2/ops_fstype.c:835
init_inodes+0xe0/0x2d8 fs/gfs2/ops_fstype.c:889
gfs2_fill_super+0x1608/0x1f9c fs/gfs2/ops_fstype.c:1247
get_tree_bdev+0x360/0x54c fs/super.c:1355
gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1330
vfs_get_tree+0x90/0x274 fs/super.c:1562
do_new_mount+0x278/0x8fc fs/namespace.c:3051
path_mount+0x590/0xe5c fs/namespace.c:3381
do_mount fs/namespace.c:3394 [inline]
__do_sys_mount fs/namespace.c:3602 [inline]
__se_sys_mount fs/namespace.c:3579 [inline]
__arm64_sys_mount+0x45c/0x594 fs/namespace.c:3579
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task kworker/0:9:8143 blocked for more than 144 seconds.
Not tainted 6.1.80-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9 state:D stack:0 pid:8143 ppid:2 flags:0x00000008
Workqueue: gfs_recovery gfs2_recover_func
Call trace:
__switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0xee4/0x1c98 kernel/sched/core.c:6558
schedule+0xc4/0x170 kernel/sched/core.c:6634
io_schedule+0x8c/0x188 kernel/sched/core.c:8786
folio_wait_bit_common+0x65c/0xb90 mm/filemap.c:1296
folio_wait_bit+0x30/0x40 mm/filemap.c:1440
folio_wait_locked include/linux/pagemap.h:1057 [inline]
gfs2_jhead_process_page+0x150/0x5c0 fs/gfs2/lops.c:476
gfs2_find_jhead+0xa58/0xbe0 fs/gfs2/lops.c:594
gfs2_recover_func+0x550/0x18f0 fs/gfs2/recovery.c:460
process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292
worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
kthread+0x250/0x2d8 kernel/kthread.c:376
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffff8000159f4df0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffff8000159f55f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffff8000159f4c20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:318
2 locks held by getty/3984:
#0: ffff0000d7750098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80001bc902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188
4 locks held by kworker/u4:10/4643:
#0: ffff0001b4394198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:537 [inline]
#0: ffff0001b4394198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1354 [inline]
#0: ffff0001b4394198 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1644 [inline]
#0: ffff0001b4394198 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2c4/0x1c98 kernel/sched/core.c:6475
#1: ffff0001b4380b88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3c0/0x618 kernel/sched/psi.c:1000
#2: ffff0000de0d4d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1114 [inline]
#2: ffff0000de0d4d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa0/0x1230 net/mac80211/ibss.c:1680
#3: ffff0001190497a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1256 [inline]
#3: ffff0001190497a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1299 [inline]
#3: ffff0001190497a0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x494/0x1230 net/mac80211/ibss.c:1708
1 lock held by syz-executor.2/8142:
#0: ffff00010ecb20e0 (&type->s_umount_key#67/1){+.+.}-{3:3}, at: alloc_super+0x1b4/0x824 fs/super.c:228
2 locks held by kworker/0:9/8143:
#0: ffff0000c80ee138 ((wq_completion)gfs_recovery){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265
#1: ffff80001faa7c20 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267

=============================================



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