INFO: task syz.7.698:9623 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.698       state:D stack:24272 pid:9623  ppid:7747   flags:0x00004006
Call Trace:
 <TASK>
 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+0x837/0xd20 fs/gfs2/lops.c:583
 check_journal_clean+0x1c6/0x360 fs/gfs2/util.c:76
 init_journal+0x1802/0x2330 fs/gfs2/ops_fstype.c:828
 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: 0033:0x7f36ccd9e04a
RSP: 002b:00007f36cdbf3e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f36cdbf3ee0 RCX: 00007f36ccd9e04a
RDX: 0000200000037f40 RSI: 0000200000037f80 RDI: 00007f36cdbf3ea0
RBP: 0000200000037f40 R08: 00007f36cdbf3ee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000037f80
R13: 00007f36cdbf3ea0 R14: 0000000000037f52 R15: 0000200000000500
 </TASK>

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]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
3 locks held by kworker/u4:12/2994:
 #0: ffff8880b8e3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
 #1: ffff8880b8e289c0 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:189 [inline]
 #1: ffff8880b8e289c0 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2176/0x45a0 kernel/sched/core.c:6695
 #2: ffff88807a6d8198 (key#17){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline]
 #2: ffff88807a6d8198 (key#17){+...}-{2:2}, at: batadv_nc_purge_paths+0xe7/0x3a0 net/batman-adv/network-coding.c:442
2 locks held by getty/5529:
 #0: ffff88814ce2f0a0 (&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/1:3/5759:
 #0: ffff888017c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
 #0: ffff888017c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730
 #1: ffffc900047dfd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2628 [inline]
 #1: ffffc900047dfd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x96f/0x15d0 kernel/workqueue.c:2730
1 lock held by udevd/7885:
 #0: ffff8880b8e3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
1 lock held by udevd/7906:
1 lock held by syz.7.698/9623:
 #0: ffff8880258800e0 (&type->s_umount_key#87){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff8880258800e0 (&type->s_umount_key#87){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff8880258800e0 (&type->s_umount_key#87){+.+.}-{3:3}, at: get_tree_bdev+0x353/0x520 fs/super.c:1589
1 lock held by syz.8.1119/11839:
1 lock held by syz.4.1124/11861:
 #0: ffffffff8d137ab8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
 #0: ffffffff8d137ab8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3da/0x880 kernel/rcu/tree_exp.h:1004
3 locks held by syz.8.1128/11894:
1 lock held by syz.8.1137/11933:
 #0: ffff88804c5c2c20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff88804c5c2c20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline]
 #0: ffff88804c5c2c20 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x9b/0x230 net/socket.c:1420
4 locks held by syz.2.1138/11937:
3 locks held by syz.1.1135/11940:
 #0: ffff88805a4f20e0 (&type->s_umount_key#69){+.+.}-{3:3}, at: xfs_open_devices+0x3f0/0x420 fs/xfs/xfs_super.c:491
 #1: ffff8880b8e289c0 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:189 [inline]
 #1: ffff8880b8e289c0 (psi_seq){-.-.}-{0:0}, at: __schedule+0x2176/0x45a0 kernel/sched/core.c:6695
 #2: ffff88802a086e28 (&(&sig->stats_lock)->lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #2: ffff88802a086e28 (&(&sig->stats_lock)->lock){....}-{2:2}, at: write_seqlock include/linux/seqlock.h:933 [inline]
 #2: ffff88802a086e28 (&(&sig->stats_lock)->lock){....}-{2:2}, at: __exit_signal kernel/exit.c:186 [inline]
 #2: ffff88802a086e28 (&(&sig->stats_lock)->lock){....}-{2:2}, at: release_task+0x7db/0x1630 kernel/exit.c:256
1 lock held by dhcpcd-run-hook/11972:

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

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:
 <TASK>
 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
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11894 Comm: syz.8.1128 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_switch+0x0/0x120 kernel/kcov.c:329
Code: 05 4c 8d 51 28 4d 39 ca 77 1e 49 ff c0 4c 89 02 48 c7 44 0a 08 07 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 c3 90 <f3> 0f 1e fa 48 8b 06 48 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9
RSP: 0018:ffffc9000e3565f0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffffff8f18f308 RCX: ffff88802395da00
RDX: 0000000000000000 RSI: ffffffff8cfa07c0 RDI: 0000000000000002
RBP: ffffc9000e356718 R08: ffffc9000e356790 R09: 0000000000000001
R10: 0000000000000004 R11: 0000000000000000 R12: ffffc9000e3566c8
R13: dffffc0000000000 R14: 0000000000000002 R15: ffffffff8f18f30d
FS:  00007fe48da156c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe48cdea2f8 CR3: 000000006b4af000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 unwind_next_frame+0x655/0x2970 arch/x86/kernel/unwind_orc.c:505
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 save_stack+0x125/0x230 mm/page_owner.c:128
 __set_page_owner+0x1d/0x60 mm/page_owner.c:192
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
 __folio_alloc+0x10/0x20 mm/page_alloc.c:4532
 vma_alloc_folio+0x47a/0x8f0 mm/mempolicy.c:2240
 shmem_alloc_folio+0x1a9/0x2a0 mm/shmem.c:1679
 shmem_alloc_and_acct_folio+0x1e6/0x6d0 mm/shmem.c:1704
 shmem_get_folio_gfp+0xcde/0x2aa0 mm/shmem.c:2041
 shmem_get_folio mm/shmem.c:2164 [inline]
 shmem_write_begin+0xf2/0x420 mm/shmem.c:2706
 generic_perform_write+0x2fe/0x5c0 mm/filemap.c:4036
 shmem_file_write_iter+0xfb/0x120 mm/shmem.c:2883
 __kernel_write_iter+0x28c/0x690 fs/read_write.c:517
 dump_emit_page fs/coredump.c:957 [inline]
 dump_user_range+0x420/0x860 fs/coredump.c:984
 elf_core_dump+0x31d0/0x3770 fs/binfmt_elf.c:2184
 do_coredump+0x17cc/0x24d0 fs/coredump.c:833
 get_signal+0x1133/0x13f0 kernel/signal.c:2888
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 exc_page_fault+0x8c/0x100 arch/x86/mm/fault.c:1519
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x69f210175f
Code: Unable to access opcode bytes at 0x69f2101735.
RSP: 002b:00002000000000b8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fe48ce15fa0 RCX: 00007fe48cb9cdd9
RDX: 0000200000000100 RSI: 00002000000000b0 RDI: 0000000000000200
RBP: 00007fe48cc32d69 R08: 0000200000000180 R09: 0000200000000180
R10: 0000200000000140 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fe48ce16038 R14: 00007fe48ce15fa0 R15: 00007ffcbe8a0178
 </TASK>