INFO: task syz-executor.1:9311 blocked for more than 430 seconds. Not tainted 6.2.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:9311 ppid:9214 flags:0x00000001 Backtrace: [<817cc004>] (__schedule) from [<817ccc7c>] (schedule+0x5c/0xac kernel/sched/core.c:6693) r10:84972e00 r9:00000000 r8:00000002 r7:00000000 r6:e46e1e10 r5:84977300 r4:84977300 [<817ccc20>] (schedule) from [<817d1f38>] (rt_mutex_slowlock_block.constprop.0+0x38/0x164 kernel/locking/rtmutex.c:1558) r5:84977300 r4:82952454 [<817d1f00>] (rt_mutex_slowlock_block.constprop.0) from [<817d3100>] (__rt_mutex_slowlock.constprop.0+0x78/0x270 kernel/locking/rtmutex.c:1626) r10:84f52e94 r9:83eb0d80 r8:e46e1e10 r7:00000002 r6:82952454 r5:00000000 r4:84977300 r3:e46e1e10 [<817d3088>] (__rt_mutex_slowlock.constprop.0) from [<817d33a4>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1662 [inline]) [<817d3088>] (__rt_mutex_slowlock.constprop.0) from [<817d33a4>] (rt_mutex_slowlock kernel/locking/rtmutex.c:1691 [inline]) [<817d3088>] (__rt_mutex_slowlock.constprop.0) from [<817d33a4>] (__rt_mutex_lock kernel/locking/rtmutex.c:1703 [inline]) [<817d3088>] (__rt_mutex_slowlock.constprop.0) from [<817d33a4>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline]) [<817d3088>] (__rt_mutex_slowlock.constprop.0) from [<817d33a4>] (rt_mutex_lock+0xac/0xc4 kernel/locking/rtmutex_api.c:71) r9:83eb0d80 r8:84f52e80 r7:00000006 r6:a0000013 r5:82952454 r4:00000000 [<817d32f8>] (rt_mutex_lock) from [<80f00a14>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:827) r6:83eb0d80 r5:00000006 r4:82952440 [<80f00a00>] (i2c_adapter_lock_bus) from [<80f02778>] (i2c_lock_bus include/linux/i2c.h:793 [inline]) [<80f00a00>] (i2c_adapter_lock_bus) from [<80f02778>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:44 [inline]) [<80f00a00>] (i2c_adapter_lock_bus) from [<80f02778>] (i2c_transfer+0x94/0x134 drivers/i2c/i2c-core-base.c:2166) [<80f026e4>] (i2c_transfer) from [<80f07914>] (i2cdev_ioctl_rdwr+0x1f8/0x234 drivers/i2c/i2c-dev.c:297) r6:00000005 r5:00000005 r4:83eb0dc8 [<80f0771c>] (i2cdev_ioctl_rdwr) from [<80f0831c>] (i2cdev_ioctl+0x2d4/0x34c drivers/i2c/i2c-dev.c:458) r10:83d0ee50 r9:00000003 r8:83ee0c00 r7:20000440 r6:84fbf800 r5:00000707 r4:20000440 [<80f08048>] (i2cdev_ioctl) from [<804d175c>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80f08048>] (i2cdev_ioctl) from [<804d175c>] (do_vfs_ioctl fs/ioctl.c:830 [inline]) [<80f08048>] (i2cdev_ioctl) from [<804d175c>] (__do_sys_ioctl fs/ioctl.c:868 [inline]) [<80f08048>] (i2cdev_ioctl) from [<804d175c>] (sys_ioctl+0x110/0xa70 fs/ioctl.c:856) r6:83ee0c01 r5:00000000 r4:00000707 [<804d164c>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xe46e1fa8 to 0xe46e1ff0) 1fa0: 00000000 00000000 00000003 00000707 20000440 00000000 1fc0: 00000000 00000000 0014c348 00000036 7eebe3c2 76b846d0 7eebe534 76b8420c 1fe0: 76b84020 76b84010 00016fec 0004dfa0 r10:00000036 r9:84977300 r8:80200288 r7:00000036 r6:0014c348 r5:00000000 r4:00000000 NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.2.0-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<817ac548>] (dump_backtrace) from [<817ac63c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:8240c5e0 r5:60000193 r4:81d8ab40 [<817ac624>] (show_stack) from [<817c8b50>] (__dump_stack lib/dump_stack.c:88 [inline]) [<817ac624>] (show_stack) from [<817c8b50>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817c8b08>] (dump_stack_lvl) from [<817c8b74>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:00000001 [<817c8b5c>] (dump_stack) from [<81799f30>] (nmi_cpu_backtrace+0x170/0x18c lib/nmi_backtrace.c:111) [<81799dc0>] (nmi_cpu_backtrace) from [<8179a0cc>] (nmi_trigger_cpumask_backtrace+0x180/0x228 lib/nmi_backtrace.c:62) r9:00000002 r8:8020fd94 r7:00000000 r6:8240c5e0 r5:8240c49c r4:00000000 [<81799f4c>] (nmi_trigger_cpumask_backtrace) from [<80210edc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:854) r10:00000064 r9:00017cc0 r8:82404d40 r7:00007f2f r6:826929a8 r5:8240c5fc r4:840aa964 r3:00000001 [<80210ec4>] (arch_trigger_cpumask_backtrace) from [<80333a30>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]) [<80210ec4>] (arch_trigger_cpumask_backtrace) from [<80333a30>] (check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]) [<80210ec4>] (arch_trigger_cpumask_backtrace) from [<80333a30>] (watchdog+0x4a4/0x58c kernel/hung_task.c:377) [<8033358c>] (watchdog) from [<8026a0b0>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df819e4c r8:82abc880 r7:00000000 r6:8033358c r5:82902e00 r4:82abc7c0 [<80269fc4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:133) Exception stack(0xdf8c9fb0 to 0xdf8c9ff8) 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 r5:80269fc4 r4:82abc7c0 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2736 Comm: klogd Not tainted 6.2.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76e4f134 LR is at 0x76e9471c pc : [<76e4f134>] lr : [<76e9471c>] psr: 600f0010 sp : 7ee9cbe8 ip : 000003ef fp : 00000000 r10: 76fdc080 r9 : 00000000 r8 : 7ee9ccb0 r7 : 76f82b1c r6 : 76f84000 r5 : 00000000 r4 : 00419190 r3 : 00000000 r2 : 76f84c80 r1 : 76f84638 r0 : 00419190 Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment none Control: 30c5387d Table: 841220c0 DAC: 00000000 Backtrace: no frame pointer