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From: Puranjay Mohan <puranjay12@gmail.com>
To: syzbot <syzbot+186522670e6722692d86@syzkaller.appspotmail.com>,
 akpm@linux-foundation.org, alexei.starovoitov@gmail.com,
 andrii.nakryiko@gmail.com, bpf@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux-mm@kvack.org, linux@armlinux.org.uk, mark.rutland@arm.com,
 syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [mm?] BUG: unable to handle kernel paging request in
 copy_from_kernel_nofault (2)
In-Reply-To: <00000000000065955e0615a759ab@google.com>
References: <00000000000065955e0615a759ab@google.com>
Date: Tue, 09 Apr 2024 11:07:22 +0000
Message-ID: <mb61p7ch6yetx.fsf@gmail.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain

syzbot <syzbot+186522670e6722692d86@syzkaller.appspotmail.com> writes:

> Hello,
>
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> INFO: task hung in _vm_unmap_aliases
>
> INFO: task kworker/0:1:8 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:1     state:D stack:0     pid:8     tgid:8     ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:df839d94 r5:82e2d400
>  r4:82e2d400
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:82e2d400 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:df839e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4f80
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4f80
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:82e2d400 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f02d000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfb13000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84eebf54 r4:84eebc00
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84eebf54 r4:82c0bf00
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:82e2d400 r9:82c0bf2c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:82c0bf00
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:df835e90 r8:82cad880 r7:82c0bf00 r6:802672c4 r5:82e2d400
>  r4:82cad140
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdf839fb0 to 0xdf839ff8)
> 9fa0:                                     00000000 00000000 00000000 00000000
> 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:82cad140
> INFO: task kworker/1:6:3904 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/1:6     state:D stack:0     pid:3904  tgid:3904  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16205 r9:00000000 r8:82714be8 r7:00000002 r6:e0741d94 r5:83efd400
>  r4:83efd400
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:83efd400 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16205 r9:e0741e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4300
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16205 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4300
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:83efd400 r8:00000180 r7:00000000 r6:82c16200 r5:00001000 r4:7f00b000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:df98f000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84ee9754 r4:84ee9400
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:ddde40c0 r6:82c16200 r5:84ee9754 r4:84603500
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:83efd400 r9:8460352c r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
>  r4:84603500
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:df879e90 r8:84e34440 r7:84603500 r6:802672c4 r5:83efd400
>  r4:84cc58c0
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xe0741fb0 to 0xe0741ff8)
> 1fa0:                                     00000000 00000000 00000000 00000000
> 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84cc58c0
> INFO: task kworker/0:55:4238 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:55    state:D stack:0     pid:4238  tgid:4238  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:dfb09d94 r5:84e8c800
>  r4:84e8c800
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e8c800 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:dfb09e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8640
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8640
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e8c800 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f057000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dffb3000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84e08b54 r4:84e08800
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84e08b54 r4:84e60000
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e8c800 r9:84e6002c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:84e60000
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:df9bde90 r8:84616fc0 r7:84e60000 r6:802672c4 r5:84e8c800
>  r4:84e5b940
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdfb09fb0 to 0xdfb09ff8)
> 9fa0:                                     00000000 00000000 00000000 00000000
> 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84e5b940
> INFO: task kworker/0:57:4264 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:57    state:D stack:0     pid:4264  tgid:4264  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:dfd11d94 r5:844e5400
>  r4:844e5400
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:844e5400 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:dfd11e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4d80
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb4d80
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:844e5400 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f02f000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfb49000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84eeaf54 r4:84eeac00
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84eeaf54 r4:84e60100
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:844e5400 r9:84e6012c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:84e60100
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfb09e90 r8:84ea8b80 r7:84e60100 r6:802672c4 r5:844e5400
>  r4:84ea8b00
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdfd11fb0 to 0xdfd11ff8)
> 1fa0:                                     00000000 00000000 00000000 00000000
> 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84ea8b00
> INFO: task kworker/1:59:4286 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/1:59    state:D stack:0     pid:4286  tgid:4286  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16205 r9:00000000 r8:82714be8 r7:00000002 r6:dfe89d94 r5:84e96000
>  r4:84e96000
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e96000 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16205 r9:dfe89e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8040
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16205 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8040
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e96000 r8:00000180 r7:00000000 r6:82c16200 r5:00001000 r4:7f055000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dff77000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:82ceb354 r4:82ceb000
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:ddde40c0 r6:82c16200 r5:82ceb354 r4:84e69480
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e96000 r9:84e694ac r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
>  r4:84e69480
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfdcde90 r8:84ea8840 r7:84e69480 r6:802672c4 r5:84e96000
>  r4:84ea8e40
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdfe89fb0 to 0xdfe89ff8)
> 9fa0:                                     00000000 00000000 00000000 00000000
> 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84ea8e40
> INFO: task kworker/1:63:4298 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/1:63    state:D stack:0     pid:4298  tgid:4298  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16205 r9:00000000 r8:82714be8 r7:00000002 r6:dfee5d94 r5:84e91800
>  r4:84e91800
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e91800 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16205 r9:dfee5e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eba380
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16205 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eba380
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e91800 r8:00000180 r7:00000000 r6:82c16200 r5:00001000 r4:7f00d000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:df9d3000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84e18b54 r4:84e18800
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:ddde40c0 r6:82c16200 r5:84e18b54 r4:84e69680
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e91800 r9:84e696ac r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
>  r4:84e69680
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfe89e90 r8:84e53340 r7:84e69680 r6:802672c4 r5:84e91800
>  r4:84e532c0
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdfee5fb0 to 0xdfee5ff8)
> 5fa0:                                     00000000 00000000 00000000 00000000
> 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84e532c0
> INFO: task kworker/1:64:4299 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/1:64    state:D stack:0     pid:4299  tgid:4299  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16205 r9:00000000 r8:82714be8 r7:00000002 r6:dff41d94 r5:84e74800
>  r4:84e74800
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e74800 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16205 r9:dff41e20 r8:00000000 r7:ffffffff r6:00000000 r5:84e53640
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16205 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84e53640
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e74800 r8:00000180 r7:00000000 r6:82c16200 r5:00001000 r4:7f033000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfbd7000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84ee8f54 r4:84ee8c00
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:ddde40c0 r6:82c16200 r5:84ee8f54 r4:84e69780
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e74800 r9:84e697ac r8:61c88647 r7:ddde40e0 r6:82604d40 r5:ddde40c0
>  r4:84e69780
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfe89e90 r8:84eb4000 r7:84e69780 r6:802672c4 r5:84e74800
>  r4:84e53900
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdff41fb0 to 0xdff41ff8)
> 1fa0:                                     00000000 00000000 00000000 00000000
> 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84e53900
> INFO: task kworker/0:58:4308 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:58    state:D stack:0     pid:4308  tgid:4308  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:dff71d94 r5:84e76c00
>  r4:84e76c00
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e76c00 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:dff71e20 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8d00
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84eb8d00
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e76c00 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f031000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfb8f000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84c30b54 r4:84c30800
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84c30b54 r4:84e60180
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e76c00 r9:84e601ac r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:84e60180
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfd11e90 r8:84eb4a40 r7:84e60180 r6:802672c4 r5:84e76c00
>  r4:84eb4e00
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdff71fb0 to 0xdff71ff8)
> 1fa0:                                     00000000 00000000 00000000 00000000
> 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84eb4e00
> INFO: task kworker/0:59:4311 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:59    state:D stack:0     pid:4311  tgid:4311  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:dfb8dd94 r5:84e75400
>  r4:84e75400
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e75400 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:dfb8de20 r8:00000000 r7:ffffffff r6:00000000 r5:84e5b5c0
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84e5b5c0
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e75400 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f03b000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfcc9000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84e19b54 r4:84e19800
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84e19b54 r4:84e60280
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e75400 r9:84e602ac r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:84e60280
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dff71e90 r8:84eb8c00 r7:84e60280 r6:802672c4 r5:84e75400
>  r4:84eb4380
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdfb8dfb0 to 0xdfb8dff8)
> dfa0:                                     00000000 00000000 00000000 00000000
> dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84eb4380
> INFO: task kworker/0:60:4312 blocked for more than 430 seconds.
>       Not tainted 6.9.0-rc2-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> task:kworker/0:60    state:D stack:0     pid:4312  tgid:4312  ppid:2      flags:0x00000000
> Workqueue: events bpf_prog_free_deferred
> Call trace: 
> [<8189be20>] (__schedule) from [<8189ca5c>] (__schedule_loop kernel/sched/core.c:6823 [inline])
> [<8189be20>] (__schedule) from [<8189ca5c>] (schedule+0x2c/0xfc kernel/sched/core.c:6838)
>  r10:82c16005 r9:00000000 r8:82714be8 r7:00000002 r6:dffb1d94 r5:84e90c00
>  r4:84e90c00
> [<8189ca30>] (schedule) from [<8189d06c>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6895)
>  r5:84e90c00 r4:82714be4
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock_common kernel/locking/mutex.c:684 [inline])
> [<8189d054>] (schedule_preempt_disabled) from [<8189f94c>] (__mutex_lock.constprop.0+0x2e8/0xae0 kernel/locking/mutex.c:752)
> [<8189f664>] (__mutex_lock.constprop.0) from [<818a0218>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1040)
>  r10:82c16005 r9:dffb1e20 r8:00000000 r7:ffffffff r6:00000000 r5:84e5b640
>  r4:00000000
> [<818a0204>] (__mutex_lock_slowpath) from [<818a0258>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:286)
> [<818a021c>] (mutex_lock) from [<8049c734>] (_vm_unmap_aliases+0x60/0x2e8 mm/vmalloc.c:2788)
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vm_reset_perms mm/vmalloc.c:3235 [inline])
> [<8049c6d4>] (_vm_unmap_aliases) from [<804a05b8>] (vfree+0x170/0x1e4 mm/vmalloc.c:3314)
>  r10:82c16005 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84e5b640
>  r4:00000000
> [<804a0448>] (vfree) from [<802edb3c>] (module_memfree+0x30/0x50 kernel/module/main.c:1189)
>  r9:84e90c00 r8:00000080 r7:00000000 r6:82c16000 r5:00001000 r4:7f03f000
> [<802edb0c>] (module_memfree) from [<803916e0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1058)
>  r5:00001000 r4:dfd63000
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_binary_free kernel/bpf/core.c:1104 [inline])
> [<803916d0>] (bpf_jit_free_exec) from [<803918a0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1228)
> [<80391838>] (bpf_jit_free) from [<80392988>] (bpf_prog_free_deferred+0x14c/0x164 kernel/bpf/core.c:2783)
>  r5:84ef0754 r4:84ef0400
> [<8039283c>] (bpf_prog_free_deferred) from [<8026678c>] (process_one_work+0x1b8/0x508 kernel/workqueue.c:3254)
>  r7:dddd00c0 r6:82c16000 r5:84ef0754 r4:84e60300
> [<802665d4>] (process_one_work) from [<802674b0>] (process_scheduled_works kernel/workqueue.c:3335 [inline])
> [<802665d4>] (process_one_work) from [<802674b0>] (worker_thread+0x1ec/0x418 kernel/workqueue.c:3416)
>  r10:84e90c00 r9:84e6032c r8:61c88647 r7:dddd00e0 r6:82604d40 r5:dddd00c0
>  r4:84e60300
> [<802672c4>] (worker_thread) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:dfb8de90 r8:84eb8f40 r7:84e60300 r6:802672c4 r5:84e90c00
>  r4:84eb4300
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdffb1fb0 to 0xdffb1ff8)
> 1fa0:                                     00000000 00000000 00000000 00000000
> 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:84eb4300
> Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
> NMI backtrace for cpu 0
> CPU: 0 PID: 31 Comm: khungtaskd Not tainted 6.9.0-rc2-syzkaller #0
> Hardware name: ARM-Versatile Express
> Call trace: 
> [<8187a69c>] (dump_backtrace) from [<8187a798>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
>  r7:00000000 r6:00000013 r5:60000093 r4:81fc48fc
> [<8187a780>] (show_stack) from [<81897f54>] (__dump_stack lib/dump_stack.c:88 [inline])
> [<8187a780>] (show_stack) from [<81897f54>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:114)
> [<81897ee4>] (dump_stack_lvl) from [<81897f78>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
>  r5:00000000 r4:00000001
> [<81897f60>] (dump_stack) from [<81867a74>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113)
> [<81867914>] (nmi_cpu_backtrace) from [<81867bc0>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62)
>  r7:00000000 r6:8260c590 r5:8261a88c r4:ffffffff
> [<81867a90>] (nmi_trigger_cpumask_backtrace) from [<802105b4>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851)
>  r9:8260c6f4 r8:000076c2 r7:8289dfe0 r6:00007d59 r5:8514be04 r4:850f5d24
> [<8021059c>] (arch_trigger_cpumask_backtrace) from [<8034ec78>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline])
> [<8021059c>] (arch_trigger_cpumask_backtrace) from [<8034ec78>] (check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline])
> [<8021059c>] (arch_trigger_cpumask_backtrace) from [<8034ec78>] (watchdog+0x480/0x594 kernel/hung_task.c:380)
> [<8034e7f8>] (watchdog) from [<802701c4>] (kthread+0x104/0x134 kernel/kthread.c:388)
>  r10:00000000 r9:df819e58 r8:82e98340 r7:00000000 r6:8034e7f8 r5:82ee8c00
>  r4:82f41200
> [<802700c0>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134)
> Exception stack(0xdf8ddfb0 to 0xdf8ddff8)
> dfa0:                                     00000000 00000000 00000000 00000000
> dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
>  r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802700c0 r4:82f41200
> Sending NMI from CPU 0 to CPUs 1:
> NMI backtrace for cpu 1
> CPU: 1 PID: 6890 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller #0
> Hardware name: ARM-Versatile Express
> PC is at kmap_local_sched_in kernel/sched/core.c:5189 [inline]
> PC is at finish_task_switch+0x8c/0x298 kernel/sched/core.c:5291
> LR is at __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
> LR is at _raw_spin_unlock+0x2c/0x50 kernel/locking/spinlock.c:186
> pc : [<8027cd4c>]    lr : [<818a4f88>]    psr: 20000113
> sp : eb539ab8  ip : eb539aa8  fp : eb539afc
> r10: 00000402  r9 : 8514bc00  r8 : 82e33000
> r7 : a3e9c050  r6 : 8189c228  r5 : ddde4440  r4 : 00000000
> r3 : 8514bc00  r2 : 00000001  r1 : 81fc48fc  r0 : 00000001
> Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
> Control: 30c5387d  Table: 851ca6c0  DAC: 00000000
> Call trace: 
> [<8027ccc0>] (finish_task_switch) from [<8189c228>] (context_switch kernel/sched/core.c:5412 [inline])
> [<8027ccc0>] (finish_task_switch) from [<8189c228>] (__schedule+0x408/0xc10 kernel/sched/core.c:6746)
>  r10:00000000 r9:84df6400 r8:a69b624b r7:a3e9c050 r6:8514bc00 r5:ddde4440
>  r4:82e33000
> [<8189be20>] (__schedule) from [<8189d0b8>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7068)
>  r10:eb539db0 r9:8514bc00 r8:80200b9c r7:eb539bbc r6:ffffffff r5:8514bc00
>  r4:00000000
> [<8189d078>] (preempt_schedule_irq) from [<80200bb4>] (svc_preempt+0x8/0x18)
> Exception stack(0xeb539b88 to 0xeb539bd0)
> 9b80:                   000f1b1e 003ff40e 0000071f 00000000 00000000 8514bc00
> 9ba0: 00000598 0000071f 000f1b1e 00000000 eb539db0 eb539bf4 eb539bf8 eb539bd8
> 9bc0: 80479eb8 8027f380 60000113 ffffffff
>  r5:60000113 r4:8027f380
> [<8027f354>] (migrate_disable) from [<80479eb8>] (__kmap_local_pfn_prot+0x20/0x1ac mm/highmem.c:548)
>  r7:0000071f r6:00c00000 r5:dedf605c r4:00000000
> [<80479e98>] (__kmap_local_pfn_prot) from [<8047a0b4>] (__kmap_local_page_prot mm/highmem.c:581 [inline])
> [<80479e98>] (__kmap_local_pfn_prot) from [<8047a0b4>] (__kmap_local_page_prot+0x70/0x74 mm/highmem.c:564)
>  r8:00000001 r7:828584e8 r6:00000001 r5:dedf605c r4:00000000
> [<8047a044>] (__kmap_local_page_prot) from [<804a23ec>] (kmap_local_page include/linux/highmem-internal.h:73 [inline])
> [<8047a044>] (__kmap_local_page_prot) from [<804a23ec>] (clear_highpage_kasan_tagged include/linux/highmem.h:246 [inline])
> [<8047a044>] (__kmap_local_page_prot) from [<804a23ec>] (kernel_init_pages+0x3c/0x60 mm/page_alloc.c:1080)
> [<804a23b0>] (kernel_init_pages) from [<804a52d4>] (post_alloc_hook+0x88/0xc0 mm/page_alloc.c:1532)
>  r9:00000000 r8:827e21bc r7:00000001 r6:00000001 r5:dedf6038 r4:00000000
> [<804a524c>] (post_alloc_hook) from [<804a7968>] (prep_new_page mm/page_alloc.c:1541 [inline])
> [<804a524c>] (post_alloc_hook) from [<804a7968>] (get_page_from_freelist+0x28c/0x13d8 mm/page_alloc.c:3317)
>  r7:8514bc00 r6:827e1f00 r5:00000000 r4:00540dc2
> [<804a76dc>] (get_page_from_freelist) from [<804a8fe4>] (__alloc_pages+0xe0/0x1168 mm/page_alloc.c:4575)
>  r10:00000000 r9:84df6400 r8:20000000 r7:8514bc00 r6:00440dc2 r5:00540dc2
>  r4:00000000
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (__alloc_pages_node include/linux/gfp.h:238 [inline])
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (alloc_pages_node include/linux/gfp.h:261 [inline])
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (alloc_pages include/linux/gfp.h:274 [inline])
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (pagetable_alloc include/linux/mm.h:2862 [inline])
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (__pte_alloc_one include/asm-generic/pgalloc.h:68 [inline])
> [<804a8f04>] (__alloc_pages) from [<8047b688>] (pte_alloc_one+0x24/0xf8 arch/arm/include/asm/pgalloc.h:99)
>  r10:00000040 r9:84df6400 r8:20000000 r7:84db6000 r6:20000000 r5:85268800
>  r4:84df6400
> [<8047b664>] (pte_alloc_one) from [<8047cc70>] (__pte_alloc+0x2c/0x108 mm/memory.c:440)
>  r5:85268800 r4:84df6400
> [<8047cc44>] (__pte_alloc) from [<80481b10>] (do_anonymous_page mm/memory.c:4402 [inline])
> [<8047cc44>] (__pte_alloc) from [<80481b10>] (do_pte_missing mm/memory.c:3878 [inline])
> [<8047cc44>] (__pte_alloc) from [<80481b10>] (handle_pte_fault mm/memory.c:5300 [inline])
> [<8047cc44>] (__pte_alloc) from [<80481b10>] (__handle_mm_fault mm/memory.c:5441 [inline])
> [<8047cc44>] (__pte_alloc) from [<80481b10>] (handle_mm_fault+0xfac/0x12b8 mm/memory.c:5606)
>  r5:8514bc00 r4:00000255
> [<80480b64>] (handle_mm_fault) from [<80215d94>] (do_page_fault+0x148/0x3a8 arch/arm/mm/fault.c:333)
>  r10:00000002 r9:84df6400 r8:20000000 r7:00000a06 r6:00000255 r5:20000000
>  r4:eb539fb0
> [<80215c4c>] (do_page_fault) from [<80216174>] (do_translation_fault+0xfc/0x12c arch/arm/mm/fault.c:444)
>  r10:7ee33670 r9:7ee33670 r8:80216078 r7:eb539fb0 r6:20000000 r5:00000a06
>  r4:8261d0d0
> [<80216078>] (do_translation_fault) from [<802161dc>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:565)
>  r9:7ee33670 r8:80216078 r7:eb539fb0 r6:20000000 r5:00000a06 r4:8261d0d0
> [<802161a4>] (do_DataAbort) from [<80200e3c>] (__dabt_usr+0x5c/0x60 arch/arm/kernel/entry-armv.S:427)
> Exception stack(0xeb539fb0 to 0xeb539ff8)
> 9fa0:                                     00000000 00000000 00000001 20000000
> 9fc0: 00000004 00000000 00000000 00000000 fffffffe 7ee33670 7ee33670 7ee33630
> 9fe0: 01068590 7ee333a8 0001d150 0001d4ac 40000010 ffffffff
>  r8:824a9044 r7:8514bc00 r6:ffffffff r5:40000010 r4:0001d4ac
>
>
> Tested on:
>
> commit:         2929be95 arm32, bpf: Fix sign-extension mov instruction
> git tree:       https://github.com/puranjaymohan/linux.git arm32_movsx_fix
> console output: https://syzkaller.appspot.com/x/log.txt?x=11362cf3180000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=10acd270ef193b93
> dashboard link: https://syzkaller.appspot.com/bug?extid=186522670e6722692d86
> compiler:       arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> userspace arch: arm
>
> Note: no patches were applied.

I gave it the bpf.git tree maybe that is the reason for the above??
Should have given the upstream tree with the exact commit where it was
reproduced earlier.

Let's try again, I pushed the correct tree now:

#syz test: https://github.com/puranjaymohan/linux.git arm32_movsx_fix