INFO: task syz-executor.0:4585 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:23856 pid: 4585 ppid: 4507 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11bb/0x4390 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 wait_on_page_bit_common+0x815/0xe00 mm/filemap.c:1356 wait_on_page_locked include/linux/pagemap.h:688 [inline] gfs2_jhead_process_page+0x24e/0xbc0 fs/gfs2/lops.c:476 gfs2_find_jhead+0xa90/0x1000 fs/gfs2/lops.c:586 check_journal_clean+0x189/0x300 fs/gfs2/util.c:75 init_journal+0x179c/0x2220 fs/gfs2/ops_fstype.c:832 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:891 gfs2_fill_super+0x1701/0x1f50 fs/gfs2/ops_fstype.c:1249 get_tree_bdev+0x3f1/0x610 fs/super.c:1325 gfs2_get_tree+0x4d/0x1e0 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2d6/0x3c0 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: 0033:0x7f6113f2922a RSP: 002b:00007f61132a8ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f61132a8f80 RCX: 00007f6113f2922a RDX: 000000002001f680 RSI: 000000002001f6c0 RDI: 00007f61132a8f40 RBP: 000000002001f680 R08: 00007f61132a8f80 R09: 0000000000000600 R10: 0000000000000600 R11: 0000000000000246 R12: 000000002001f6c0 R13: 00007f61132a8f40 R14: 000000000001f679 R15: 0000000020000080 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c11c720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3943: #0: ffff88802ba06098 (&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+0x5ba/0x1a30 drivers/tty/n_tty.c:2158 1 lock held by syz-executor.0/4585: #0: ffff88807a4660e0 (&type->s_umount_key#50/1){+.+.}-{3:3}, at: alloc_super+0x201/0x950 fs/super.c:229 1 lock held by udevd/4885: 1 lock held by syz-executor.0/5605: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 nmi_cpu_backtrace+0x397/0x3d0 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5607 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0033:0x7fcfc634271b Code: cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 <45> 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01 49 89 47 10 83 RSP: 002b:00007fcfc5717520 EFLAGS: 00000202 RAX: 00000000007b7bd6 RBX: 00007fcfc57175c0 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fcfc5717660 RBP: 0000000000000102 R08: 00007fcfbd2f8000 R09: 0000000000000000 R10: 0000000000000000 R11: 00007fcfc57175d0 R12: 0000000000000001 R13: 00007fcfc6404340 R14: 0000000000000000 R15: 00007fcfc5717660 FS: 00007fcfc57186c0 GS: 0000000000000000