INFO: task syz-executor.1:868 blocked for more than 430 seconds.
      Not tainted 6.8.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:0     pid:868   tgid:847   ppid:30982  flags:0x00000005
Backtrace: 
[<81884e90>] (__schedule) from [<80281924>] (__schedule_loop kernel/sched/core.c:6813 [inline])
[<81884e90>] (__schedule) from [<80281924>] (rt_mutex_schedule+0x20/0x38 kernel/sched/core.c:7105)
 r10:84785300 r9:00000000 r8:00000002 r7:00000000 r6:eab71db0 r5:8415ec00
 r4:8415ec00
[<80281904>] (rt_mutex_schedule) from [<8188b50c>] (rt_mutex_slowlock_block.constprop.0+0x38/0x160 kernel/locking/rtmutex.c:1636)
 r5:8415ec00 r4:82e1e054
[<8188b4d4>] (rt_mutex_slowlock_block.constprop.0) from [<8188c794>] (__rt_mutex_slowlock kernel/locking/rtmutex.c:1704 [inline])
[<8188b4d4>] (rt_mutex_slowlock_block.constprop.0) from [<8188c794>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1740 [inline])
[<8188b4d4>] (rt_mutex_slowlock_block.constprop.0) from [<8188c794>] (rt_mutex_slowlock.constprop.0+0xec/0x2cc kernel/locking/rtmutex.c:1778)
 r10:84785300 r9:60000013 r8:00000002 r7:eab71db0 r6:8415ec00 r5:82e1e054
 r4:00000000 r3:eab71db0
[<8188c6a8>] (rt_mutex_slowlock.constprop.0) from [<8188ca58>] (__rt_mutex_lock kernel/locking/rtmutex.c:1793 [inline])
[<8188c6a8>] (rt_mutex_slowlock.constprop.0) from [<8188ca58>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline])
[<8188c6a8>] (rt_mutex_slowlock.constprop.0) from [<8188ca58>] (rt_mutex_lock+0x44/0x48 kernel/locking/rtmutex_api.c:71)
 r9:0000003f r8:00000000 r7:0000003f r6:00000000 r5:00000000 r4:82e1e040
[<8188ca14>] (rt_mutex_lock) from [<80f66934>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:845)
[<80f66920>] (i2c_adapter_lock_bus) from [<80f6bef0>] (i2c_lock_bus include/linux/i2c.h:792 [inline])
[<80f66920>] (i2c_adapter_lock_bus) from [<80f6bef0>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:46 [inline])
[<80f66920>] (i2c_adapter_lock_bus) from [<80f6bef0>] (i2c_smbus_xfer+0xa4/0x12c drivers/i2c/i2c-core-smbus.c:541)
[<80f6be4c>] (i2c_smbus_xfer) from [<80f6dd34>] (i2cdev_ioctl_smbus+0x198/0x334 drivers/i2c/i2c-dev.c:348)
 r8:00000003 r7:20000140 r6:00000000 r5:84181800 r4:00000000
[<80f6db9c>] (i2cdev_ioctl_smbus) from [<80f6e17c>] (i2cdev_ioctl+0x2ac/0x390 drivers/i2c/i2c-dev.c:467)
 r10:84785300 r9:8415ec00 r8:00000003 r7:20000180 r6:00000720 r5:84181800
 r4:20000180
[<80f6ded0>] (i2cdev_ioctl) from [<8050d3f8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80f6ded0>] (i2cdev_ioctl) from [<8050d3f8>] (do_vfs_ioctl fs/ioctl.c:858 [inline])
[<80f6ded0>] (i2cdev_ioctl) from [<8050d3f8>] (__do_sys_ioctl fs/ioctl.c:902 [inline])
[<80f6ded0>] (i2cdev_ioctl) from [<8050d3f8>] (sys_ioctl+0x118/0xc24 fs/ioctl.c:890)
 r6:84785301 r5:00000000 r4:00000720
[<8050d2e0>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xeab71fa8 to 0xeab71ff0)
1fa0:                   00000000 00000000 00000003 00000720 20000180 00000000
1fc0: 00000000 00000000 0014c3e8 00000036 7ecfc32e 7ecfc32f 003d0f00 76b790fc
1fe0: 76b78f08 76b78ef8 000167f8 00050bc0
 r10:00000036 r9:8415ec00 r8:80200288 r7:00000036 r6:0014c3e8 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 PID: 31 Comm: khungtaskd Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<81863744>] (dump_backtrace) from [<81863840>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:00000113 r5:60000193 r4:81fc0f0c
[<81863828>] (show_stack) from [<81880fc4>] (__dump_stack lib/dump_stack.c:88 [inline])
[<81863828>] (show_stack) from [<81880fc4>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:114)
[<81880f54>] (dump_stack_lvl) from [<81880fe8>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
 r5:00000000 r4:00000001
[<81880fd0>] (dump_stack) from [<81850b1c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113)
[<818509bc>] (nmi_cpu_backtrace) from [<81850c68>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62)
 r7:00000000 r6:8260c590 r5:8261a88c r4:ffffffff
[<81850b38>] (nmi_trigger_cpumask_backtrace) from [<80210574>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851)
 r9:8260c6f4 r8:00082e42 r7:8289cfe0 r6:00007f1c r5:850a0204 r4:91b28524
[<8021055c>] (arch_trigger_cpumask_backtrace) from [<8034df78>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline])
[<8021055c>] (arch_trigger_cpumask_backtrace) from [<8034df78>] (check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline])
[<8021055c>] (arch_trigger_cpumask_backtrace) from [<8034df78>] (watchdog+0x480/0x594 kernel/hung_task.c:380)
[<8034daf8>] (watchdog) from [<8026fd30>] (kthread+0x104/0x134 kernel/kthread.c:388)
 r10:00000000 r9:df819e58 r8:82ea03c0 r7:00000000 r6:8034daf8 r5:82ef0c00
 r4:82f4a1c0
[<8026fc2c>] (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 r5:8026fc2c r4:82f4a1c0
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2989 Comm: sshd Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at neigh_output include/net/neighbour.h:538 [inline]
PC is at ip_finish_output2+0x214/0x6d8 net/ipv4/ip_output.c:235
LR is at rcu_read_lock include/linux/rcupdate.h:748 [inline]
LR is at ip_finish_output2+0x100/0x6d8 net/ipv4/ip_output.c:228
pc : [<81535034>]    lr : [<81534f20>]    psr: 60000013
sp : df951aa0  ip : 83d6d800  fp : df951acc
r10: 836d9700  r9 : 828fee80  r8 : 828fee80
r7 : 83d6d800  r6 : 836d9700  r5 : 91b7d540  r4 : 843ea900
r3 : 00082e4a  r2 : 00000000  r1 : 00082e46  r0 : 8349ad80
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 8471df00  DAC: 00000000
Backtrace: 
[<81534e20>] (ip_finish_output2) from [<81536308>] (__ip_finish_output net/ipv4/ip_output.c:313 [inline])
[<81534e20>] (ip_finish_output2) from [<81536308>] (__ip_finish_output+0x9c/0x180 net/ipv4/ip_output.c:295)
 r9:828fee80 r8:00000000 r7:000005dc r6:846e0f80 r5:828fee80 r4:91b7d540
[<8153626c>] (__ip_finish_output) from [<81536418>] (ip_finish_output+0x2c/0xe0 net/ipv4/ip_output.c:323)
 r9:828fee80 r8:00000000 r7:83d6d800 r6:828fee80 r5:91b7d540 r4:846e0f80
[<815363ec>] (ip_finish_output) from [<81536530>] (NF_HOOK_COND include/linux/netfilter.h:303 [inline])
[<815363ec>] (ip_finish_output) from [<81536530>] (ip_output+0x64/0xf8 net/ipv4/ip_output.c:433)
 r7:83d6d800 r6:846e0f80 r5:828fee80 r4:91b7d540
[<815364cc>] (ip_output) from [<81537b9c>] (dst_output include/net/dst.h:450 [inline])
[<815364cc>] (ip_output) from [<81537b9c>] (ip_local_out net/ipv4/ip_output.c:129 [inline])
[<815364cc>] (ip_output) from [<81537b9c>] (__ip_queue_xmit+0x1a0/0x498 net/ipv4/ip_output.c:535)
 r8:00000000 r7:846e1210 r6:00000001 r5:846e0f80 r4:91b7d540
[<815379fc>] (__ip_queue_xmit) from [<81537ea8>] (ip_queue_xmit+0x14/0x18 net/ipv4/ip_output.c:549)
 r10:00010600 r9:00000526 r8:91b7d558 r7:00000014 r6:00000000 r5:91b7d540
 r4:846e0f80
[<81537e94>] (ip_queue_xmit) from [<8155c5bc>] (__tcp_transmit_skb+0x558/0xd10 net/ipv4/tcp_output.c:1462)
[<8155c064>] (__tcp_transmit_skb) from [<8155dd24>] (__tcp_send_ack.part.0+0xd8/0x190 net/ipv4/tcp_output.c:4232)
 r10:00000000 r9:846e1008 r8:846e13d4 r7:00000058 r6:00000000 r5:009ee46a
 r4:846e0f80
[<8155dc4c>] (__tcp_send_ack.part.0) from [<8156134c>] (__tcp_send_ack net/ipv4/tcp_output.c:4199 [inline])
[<8155dc4c>] (__tcp_send_ack.part.0) from [<8156134c>] (tcp_send_ack+0x20/0x24 net/ipv4/tcp_output.c:4238)
 r5:00000058 r4:846e0f80
[<8156132c>] (tcp_send_ack) from [<815471bc>] (__tcp_cleanup_rbuf+0x80/0xdc net/ipv4/tcp.c:1492)
[<8154713c>] (__tcp_cleanup_rbuf) from [<81547290>] (tcp_cleanup_rbuf+0x78/0x80 net/ipv4/tcp.c:1503)
 r5:00000058 r4:846e0f80
[<81547218>] (tcp_cleanup_rbuf) from [<81547dd0>] (tcp_recvmsg_locked+0x290/0x944 net/ipv4/tcp.c:2548)
 r5:846e0f80 r4:00000000
[<81547b40>] (tcp_recvmsg_locked) from [<81549180>] (tcp_recvmsg+0x88/0x1e4 net/ipv4/tcp.c:2578)
 r10:00000001 r9:df951e20 r8:84133000 r7:00040000 r6:00000040 r5:df951e68
 r4:846e0f80
[<815490f8>] (tcp_recvmsg) from [<81589f64>] (inet_recvmsg+0x50/0x110 net/ipv4/af_inet.c:883)
 r9:00000000 r8:7699f008 r7:00000040 r6:833caf00 r5:815490f8 r4:df951e68
[<81589f14>] (inet_recvmsg) from [<8136a934>] (sock_recvmsg_nosec net/socket.c:1046 [inline])
[<81589f14>] (inet_recvmsg) from [<8136a934>] (sock_recvmsg+0x50/0x78 net/socket.c:1068)
 r6:833caf00 r5:df951e68 r4:81589f14
[<8136a8e4>] (sock_recvmsg) from [<8136a9fc>] (sock_read_iter+0xa0/0xf8 net/socket.c:1138)
 r7:8446d900 r6:833caf00 r5:df951f08 r4:df951ef0
[<8136a95c>] (sock_read_iter) from [<804f4378>] (call_read_iter include/linux/fs.h:2102 [inline])
[<8136a95c>] (sock_read_iter) from [<804f4378>] (new_sync_read fs/read_write.c:395 [inline])
[<8136a95c>] (sock_read_iter) from [<804f4378>] (vfs_read+0x2e4/0x314 fs/read_write.c:476)
 r7:00000000 r6:84133000 r5:00040000 r4:8446d900
[<804f4094>] (vfs_read) from [<804f4df8>] (ksys_read+0xc4/0xf8 fs/read_write.c:619)
 r10:00000003 r9:84133000 r8:80200288 r7:00040000 r6:7699f008 r5:8446d900
 r4:8446d900
[<804f4d34>] (ksys_read) from [<804f4e3c>] (__do_sys_read fs/read_write.c:629 [inline])
[<804f4d34>] (ksys_read) from [<804f4e3c>] (sys_read+0x10/0x14 fs/read_write.c:627)
 r7:00000003 r6:7eefe198 r5:76f35c80 r4:00040000
[<804f4e2c>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xdf951fa8 to 0xdf951ff0)
1fa0:                   00040000 76f35c80 00000004 7699f008 00040000 00000000
1fc0: 00040000 76f35c80 7eefe198 00000003 00000000 01f122d0 7eefe27c 00000001
1fe0: 00530b48 7eefe150 00495c34 76b2b2fc