INFO: task syz.0.683:7605 blocked for more than 430 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.683       state:D stack:0     pid:7605  tgid:7604  ppid:5405   flags:0x00000004
Call Trace:
[<ffffffff85fe3a74>] context_switch kernel/sched/core.c:5315 [inline]
[<ffffffff85fe3a74>] __schedule+0xd5a/0x3886 kernel/sched/core.c:6675
[<ffffffff85fe6664>] __schedule_loop kernel/sched/core.c:6752 [inline]
[<ffffffff85fe6664>] schedule+0xc4/0x324 kernel/sched/core.c:6767
[<ffffffff85fe6fac>] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:6824
[<ffffffff85feff86>] rwsem_down_read_slowpath+0x56a/0x91e kernel/locking/rwsem.c:1084
[<ffffffff85ff09dc>] __down_read_common kernel/locking/rwsem.c:1248 [inline]
[<ffffffff85ff09dc>] __down_read kernel/locking/rwsem.c:1261 [inline]
[<ffffffff85ff09dc>] down_read+0xe4/0x460 kernel/locking/rwsem.c:1526
[<ffffffff8072fec2>] filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
[<ffffffff8072fec2>] page_cache_ra_unbounded+0xe8/0x528 mm/readahead.c:226
[<ffffffff80730d04>] do_page_cache_ra mm/readahead.c:320 [inline]
[<ffffffff80730d04>] force_page_cache_ra+0x1f8/0x2f4 mm/readahead.c:349
[<ffffffff8071c73e>] force_page_cache_readahead mm/internal.h:357 [inline]
[<ffffffff8071c73e>] generic_fadvise+0x480/0x5d8 mm/fadvise.c:106
[<ffffffff8071c938>] vfs_fadvise+0xa2/0xba mm/fadvise.c:185
[<ffffffff807322a4>] ksys_readahead+0x17a/0x1e6 mm/readahead.c:695
[<ffffffff8073237e>] __do_sys_readahead mm/readahead.c:703 [inline]
[<ffffffff8073237e>] __se_sys_readahead mm/readahead.c:701 [inline]
[<ffffffff8073237e>] __riscv_sys_readahead+0x6e/0xa0 mm/readahead.c:701
[<ffffffff8000f2d4>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff85fd9c4a>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce

Showing all locks held in the system:
1 lock held by khungtaskd/37:
 #0: ffffffff87fcc100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x68/0x2d6 kernel/locking/lockdep.c:6716
2 locks held by getty/3149:
 #0: ff6000001c63f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000008b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xd7c/0x129a drivers/tty/n_tty.c:2211
1 lock held by sshd/3174:
2 locks held by kworker/u10:4/5402:
 #0: ff60000011071148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x848/0x1dae kernel/workqueue.c:3204
 #1: ff200000042d7c90 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x870/0x1dae kernel/workqueue.c:3204
1 lock held by syz.1.608/7054:
2 locks held by kworker/u10:7/7154:
1 lock held by syz.0.683/7605:
 #0: ff600000155214c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:870 [inline]
 #0: ff600000155214c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xe8/0x528 mm/readahead.c:226
1 lock held by syz.0.736/8081:
 #0: ff600000155214c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline]
 #0: ff600000155214c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1ac/0x30a block/fops.c:808
4 locks held by modprobe/8477:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff80010a14>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:130
[<ffffffff85f7c3cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:136
[<ffffffff85fd797a>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff85fd797a>] dump_stack_lvl+0x122/0x196 lib/dump_stack.c:120
[<ffffffff85fd7a0a>] dump_stack+0x1c/0x24 lib/dump_stack.c:129
[<ffffffff85f3faae>] nmi_cpu_backtrace+0x39c/0x39e lib/nmi_backtrace.c:113
[<ffffffff85f3fd66>] nmi_trigger_cpumask_backtrace+0x2b6/0x456 lib/nmi_backtrace.c:62
[<ffffffff80019974>] arch_trigger_cpumask_backtrace+0x2c/0x3c arch/riscv/kernel/smp.c:347
[<ffffffff80432c3c>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff80432c3c>] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
[<ffffffff80432c3c>] watchdog+0xcfa/0x1178 kernel/hung_task.c:379
[<ffffffff80154e14>] kthread+0x28c/0x3a6 kernel/kthread.c:389
[<ffffffff85ffcbde>] ret_from_fork+0xe/0x18 arch/riscv/kernel/entry.S:326
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2995 Comm: syslogd Not tainted 6.12.0-rc1-syzkaller-00010-gc05ad457ce8c #0
Hardware name: riscv-virtio,qemu (DT)
epc : __sanitizer_cov_trace_const_cmp8+0x0/0x1c kernel/kcov.c:320
 ra : fp_is_valid arch/riscv/kernel/stacktrace.c:28 [inline]
 ra : walk_stackframe+0x144/0x452 arch/riscv/kernel/stacktrace.c:60
epc : ffffffff80430aea ra : ffffffff800104d8 sp : ff20000007107330
 gp : ffffffff897bea80 tp : ff60000014f10000 t0 : ff20000007107680
 t1 : fffffffef214ca02 t2 : 0000000000000001 s0 : ff200000071073b0
 s1 : ff20000007107a00 a0 : 0000000000000000 a1 : 0000000000000000
 a2 : 0000000000000002 a3 : ffffffff800104c8 a4 : 0000000000000000
 a5 : ff60000014f11000 a6 : 0000000000000003 a7 : 1fec0000029e2168
 s2 : 0000000000000000 s3 : 000000000000000a s4 : ff20000007107820
 s5 : 0000000000000000 s6 : ffffffff85709b52 s7 : dfffffff00000000
 s8 : dfffffff00000000 s9 : ffffffff85ffc980 s10: 0000000000007fff
 s11: ff20000007107a00 t3 : 1fec0000029e2163 t4 : fffffffef214ca02
 t5 : fffffffef214ca03 t6 : 1fec0000029e216d
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80430aea>] __sanitizer_cov_trace_const_cmp8+0x0/0x1c kernel/kcov.c:316
[<ffffffff85fd9d70>] arch_stack_walk+0x1c/0x24 arch/riscv/kernel/stacktrace.c:163
[<ffffffff80329c14>] stack_trace_save+0xa0/0xd2 kernel/stacktrace.c:122
[<ffffffff8096f36a>] kasan_save_stack+0x3e/0x6a mm/kasan/common.c:47
[<ffffffff8096f3c0>] kasan_save_track+0x16/0x28 mm/kasan/common.c:68
[<ffffffff80972122>] kasan_save_free_info+0x40/0x5a mm/kasan/generic.c:579
[<ffffffff8096f6de>] poison_slab_object mm/kasan/common.c:247 [inline]
[<ffffffff8096f6de>] __kasan_slab_free+0x4e/0x68 mm/kasan/common.c:264
[<ffffffff808da206>] kasan_slab_free include/linux/kasan.h:230 [inline]
[<ffffffff808da206>] slab_free_hook mm/slub.c:2343 [inline]
[<ffffffff808da206>] slab_free mm/slub.c:4580 [inline]
[<ffffffff808da206>] kmem_cache_free+0x244/0x5f4 mm/slub.c:4682
[<ffffffff84c8b676>] kfree_skbmem+0x1b4/0x1ee net/core/skbuff.c:1148
[<ffffffff84cb042c>] __kfree_skb net/core/skbuff.c:1205 [inline]
[<ffffffff84cb042c>] consume_skb net/core/skbuff.c:1436 [inline]
[<ffffffff84cb042c>] consume_skb+0xd8/0xfa net/core/skbuff.c:1430
[<ffffffff84cc4354>] skb_free_datagram+0x1a/0x24 net/core/datagram.c:323
[<ffffffff85709b52>] __unix_dgram_recvmsg+0x7fc/0xe60 net/unix/af_unix.c:2520
[<ffffffff8570a27e>] unix_dgram_recvmsg+0xc8/0xea net/unix/af_unix.c:2537
[<ffffffff84c5dbba>] sock_recvmsg_nosec net/socket.c:1051 [inline]
[<ffffffff84c5dbba>] sock_recvmsg+0xd6/0x142 net/socket.c:1073
[<ffffffff84c5dee4>] sock_read_iter+0x2be/0x38e net/socket.c:1143
[<ffffffff80a26370>] new_sync_read fs/read_write.c:488 [inline]
[<ffffffff80a26370>] vfs_read+0x7b6/0x86c fs/read_write.c:569
[<ffffffff80a27af8>] ksys_read+0x1f0/0x266 fs/read_write.c:712
[<ffffffff80a27bdc>] __do_sys_read fs/read_write.c:722 [inline]
[<ffffffff80a27bdc>] __se_sys_read fs/read_write.c:720 [inline]
[<ffffffff80a27bdc>] __riscv_sys_read+0x6e/0x94 fs/read_write.c:720
[<ffffffff8000f2d4>] syscall_handler+0x94/0x118 arch/riscv/include/asm/syscall.h:90
[<ffffffff85fd9c4a>] do_trap_ecall_u+0x1aa/0x216 arch/riscv/kernel/traps.c:331
[<ffffffff85ffcac6>] _new_vmalloc_restore_context_a0+0xc2/0xce