INFO: task syz.4.10590:27743 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.10590 state:D stack:27360 pid:27743 tgid:27742 ppid:5247 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578
filemap_invalidate_lock include/linux/fs.h:860 [inline]
blkdev_fallocate+0x20e/0x490 block/fops.c:808
vfs_fallocate+0x569/0x6e0 fs/open.c:333
ksys_fallocate fs/open.c:356 [inline]
__do_sys_fallocate fs/open.c:364 [inline]
__se_sys_fallocate fs/open.c:362 [inline]
__x64_sys_fallocate+0xbd/0x110 fs/open.c:362
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe7717dff9
RSP: 002b:00007fbe77f53038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fbe77335f80 RCX: 00007fbe7717dff9
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007fbe771f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000072a00 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbe77335f80 R15: 00007fbe7745fa28
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4983:
#0: ffff88802e9420a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz.0.10555/27674:
1 lock held by syz.4.10590/27743:
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline]
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x20e/0x490 block/fops.c:808
1 lock held by syz.1.11698/30142:
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x135/0x8a0 mm/readahead.c:226
1 lock held by syz.1.11698/30144:
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline]
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:238 [inline]
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x150b/0x2480 block/ioctl.c:572
1 lock held by syz.0.12208/31243:
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
#0: ffff888023542040 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0x135/0x8a0 mm/readahead.c:226
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
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 UID: 0 PID: 4025 Comm: kworker/u8:8 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0xc68/0x2050 kernel/locking/lockdep.c:5172
Code: 00 00 48 c7 c0 40 09 3d 9a 48 c1 e8 03 48 bf 00 00 00 00 00 fc ff df 0f b6 04 38 84 c0 0f 85 f3 0c 00 00 83 3d 88 b0 cc 18 00 <75> 39 48 63 9c 24 88 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00
RSP: 0018:ffffc9000ba1f8f0 EFLAGS: 00000046
RAX: 0000000000000004 RBX: ffffffff93c96238 RCX: ffffffff9a3d0903
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff888031038b30 R08: ffffffff942c9807 R09: 1ffffffff2859300
R10: dffffc0000000000 R11: fffffbfff2859301 R12: ffff888031038000
R13: ffff888031038ad8 R14: 0000000000000000 R15: ffff888031038b50
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557534a5c8 CR3: 000000004cda8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [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:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
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>