syzbot

INFO: task syz.3.737:6710 blocked for more than 143 seconds.
      Not tainted 6.1.108-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.737       state:D stack:25304 pid:6710  ppid:6117   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 io_schedule+0x88/0x100 kernel/sched/core.c:8786
 folio_wait_bit_common+0x878/0x1290 mm/filemap.c:1296
 lock_page include/linux/pagemap.h:995 [inline]
 pickup_page_for_submission fs/erofs/zdata.c:1346 [inline]
 z_erofs_submit_queue fs/erofs/zdata.c:1539 [inline]
 z_erofs_runqueue+0x993/0x1ca0 fs/erofs/zdata.c:1611
 z_erofs_readahead+0xc26/0x1030 fs/erofs/zdata.c:1758
 read_pages+0x17f/0x830 mm/readahead.c:161
 page_cache_ra_unbounded+0x68b/0x7b0 mm/readahead.c:270
 do_page_cache_ra mm/readahead.c:300 [inline]
 force_page_cache_ra+0x2a3/0x300 mm/readahead.c:331
 force_page_cache_readahead mm/internal.h:106 [inline]
 generic_fadvise+0x553/0x7b0 mm/fadvise.c:107
 vfs_fadvise mm/fadvise.c:185 [inline]
 ksys_fadvise64_64 mm/fadvise.c:199 [inline]
 __do_sys_fadvise64 mm/fadvise.c:214 [inline]
 __se_sys_fadvise64 mm/fadvise.c:212 [inline]
 __x64_sys_fadvise64+0x138/0x180 mm/fadvise.c:212
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8150b7cef9
RSP: 002b:00007f8151a51038 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd
RAX: ffffffffffffffda RBX: 00007f8150d35f80 RCX: 00007f8150b7cef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f8150bef01e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8150d35f80 R15: 00007fff7e8ff378
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u4:1/11:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d32b190 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d32b990 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
 #0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
 #0: ffffffff8d32afc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3393:
 #0: ffff88814b67e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
1 lock held by syz.3.737/6710:
 #0: ffff888070528de8 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline]
 #0: ffff888070528de8 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xed/0x7b0 mm/readahead.c:226
1 lock held by syz.4.853/7215:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xf88/0xfd0 kernel/hung_task.c:377
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3634 Comm: syz-executor Not tainted 6.1.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:lock_release+0xc/0xa20 kernel/locking/lockdep.c:5670
Code: 07 80 c1 03 38 c1 0f 8c 73 fd ff ff 4c 89 ef e8 5a 86 77 00 e9 66 fd ff ff 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 <53> 48 83 e4 e0 48 81 ec 00 01 00 00 49 89 f5 48 89 7c 24 18 65 48
RSP: 0018:ffffc9000425fb00 EFLAGS: 00000086
RAX: ffffffff8156eb6a RBX: ffff8880796fef00 RCX: ffff88802d353b80
RDX: 0000000000000000 RSI: ffffffff8156edbb RDI: ffff8880796fef18
RBP: ffffc9000425fb20 R08: ffffffff8156eb5c R09: fffff5200084bfc0
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f2dfe33
R13: 0000000004000000 R14: 0000000000000011 R15: ffff8880796ff198
FS:  0000555585879500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc79bdd368 CR3: 000000005e538000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:157 [inline]
 _raw_spin_unlock_irq+0x12/0x40 kernel/locking/spinlock.c:202
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x154b/0x17d0 kernel/signal.c:2873
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd092d73157
Code: 89 7c 24 10 48 89 4c 24 18 e8 55 16 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 a5 16 03 00 8b 44
RSP: 002b:00007ffce00f3910 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000000026e RCX: 00007fd092d73157
RDX: 0000000040000001 RSI: 00007ffce00f396c RDI: 00000000ffffffff
RBP: 00007ffce00f396c R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000004a517 R14: 000000000004a517 R15: 00007ffce00f39c0
 </TASK>