syzbot

INFO: task syz-executor.0:6089 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:18800 pid:6089  tgid:6089  ppid:5084   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 io_schedule+0x8d/0x110 kernel/sched/core.c:9044
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1283
 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3115
 shrink_folio_list+0x5598/0x8ca0 mm/vmscan.c:1160
 shrink_inactive_list mm/vmscan.c:1926 [inline]
 shrink_list mm/vmscan.c:2163 [inline]
 shrink_lruvec+0x1638/0x2e40 mm/vmscan.c:5687
 shrink_node_memcgs mm/vmscan.c:5873 [inline]
 shrink_node+0x1189/0x2d60 mm/vmscan.c:5908
 shrink_zones mm/vmscan.c:6152 [inline]
 do_try_to_free_pages+0x695/0x1af0 mm/vmscan.c:6214
 try_to_free_mem_cgroup_pages+0x47a/0xad0 mm/vmscan.c:6529
 try_charge_memcg+0x6da/0x18a0 mm/memcontrol.c:2783
 try_charge mm/memcontrol.c:2931 [inline]
 charge_memcg+0xa2/0x160 mm/memcontrol.c:7284
 __mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:7299
 mem_cgroup_charge include/linux/memcontrol.h:691 [inline]
 __filemap_add_folio+0x3d8/0x1a80 mm/filemap.c:864
 filemap_add_folio+0x11e/0x570 mm/filemap.c:947
 page_cache_ra_unbounded+0x210/0x7a0 mm/readahead.c:250
 do_sync_mmap_readahead+0x444/0x850
 filemap_fault+0x7e5/0x16a0 mm/filemap.c:3289
 __do_fault+0x135/0x460 mm/memory.c:4531
 do_read_fault mm/memory.c:4894 [inline]
 do_fault mm/memory.c:5024 [inline]
 do_pte_missing mm/memory.c:3880 [inline]
 handle_pte_fault mm/memory.c:5300 [inline]
 __handle_mm_fault+0x45f7/0x7240 mm/memory.c:5441
 handle_mm_fault+0x27f/0x770 mm/memory.c:5606
 do_user_addr_fault arch/x86/mm/fault.c:1362 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x446/0x8e0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb9d782c535
RSP: 002b:00007fff2d771480 EFLAGS: 00010202
RAX: 0000000020000001 RBX: 0000000004000001 RCX: 0000000000000000
RDX: fec1a52c9a38c06d RSI: 0000000000000000 RDI: 00005555609dc360
RBP: 00007fff2d771618 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000001d502
R13: 000000000001d4d0 R14: 00007fff2d771660 R15: 00007fb9d7834cb0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by kworker/u8:4/69:
1 lock held by kswapd0/88:
2 locks held by getty/4830:
 #0: ffff88802ae3e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/6089:
 #0: ffff88801d4a14c8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:850 [inline]
 #0: ffff88801d4a14c8 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xfb/0x7a0 mm/readahead.c:225
3 locks held by syz-executor.0/6239:
2 locks held by syz-executor.1/7511:
1 lock held by syz-executor.1/7515:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:380
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 50 Comm: kworker/u8:3 Not tainted 6.9.0-rc5-syzkaller-00042-ge88c4cfcb7b8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:kasan_check_range+0x5/0x290 mm/kasan/generic.c:188
Code: 8d e8 af 60 e5 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 <41> 57 41 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37
RSP: 0018:ffffc90000ba79d0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81727ab4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fa7d128
RBP: ffffc90000ba7b40 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f4fa26 R12: 1ffff92000174f44
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9724e86d40 CR3: 000000002283a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:505 [inline]
 cpu_online include/linux/cpumask.h:1120 [inline]
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0xd4/0x550 kernel/locking/lockdep.c:5725
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:781 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3335
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>