INFO: task syz-executor.1:22069 blocked for more than 430 seconds. Not tainted 6.1.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:22069 ppid:22001 flags:0x00000001 Backtrace: [<817b0288>] (__schedule) from [<817b0db0>] (schedule+0x5c/0xac kernel/sched/core.c:6631) r10:849adc00 r9:00000000 r8:00000002 r7:00000000 r6:ece59e10 r5:83ef0000 r4:83ef0000 [<817b0d54>] (schedule) from [<817b5b54>] (rt_mutex_slowlock_block.constprop.0+0x38/0x164 kernel/locking/rtmutex.c:1520) r5:83ef0000 r4:8294a854 [<817b5b1c>] (rt_mutex_slowlock_block.constprop.0) from [<817b6d1c>] (__rt_mutex_slowlock.constprop.0+0x78/0x254 kernel/locking/rtmutex.c:1588) r10:84d92f04 r9:84d92680 r8:ece59e10 r7:00000002 r6:8294a854 r5:00000000 r4:83ef0000 r3:ece59e10 [<817b6ca4>] (__rt_mutex_slowlock.constprop.0) from [<817b6fa4>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1624 [inline]) [<817b6ca4>] (__rt_mutex_slowlock.constprop.0) from [<817b6fa4>] (rt_mutex_slowlock kernel/locking/rtmutex.c:1653 [inline]) [<817b6ca4>] (__rt_mutex_slowlock.constprop.0) from [<817b6fa4>] (__rt_mutex_lock kernel/locking/rtmutex.c:1665 [inline]) [<817b6ca4>] (__rt_mutex_slowlock.constprop.0) from [<817b6fa4>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline]) [<817b6ca4>] (__rt_mutex_slowlock.constprop.0) from [<817b6fa4>] (rt_mutex_lock+0xac/0xc4 kernel/locking/rtmutex_api.c:71) r9:84d92680 r8:84d92f00 r7:00000002 r6:a0000013 r5:8294a854 r4:00000000 [<817b6ef8>] (rt_mutex_lock) from [<80ee7548>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:827) r6:84d92680 r5:00000002 r4:8294a840 [<80ee7534>] (i2c_adapter_lock_bus) from [<80ee92c4>] (i2c_lock_bus include/linux/i2c.h:793 [inline]) [<80ee7534>] (i2c_adapter_lock_bus) from [<80ee92c4>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:44 [inline]) [<80ee7534>] (i2c_adapter_lock_bus) from [<80ee92c4>] (i2c_transfer+0x94/0x134 drivers/i2c/i2c-core-base.c:2166) [<80ee9230>] (i2c_transfer) from [<80eee460>] (i2cdev_ioctl_rdwr+0x1f8/0x234 drivers/i2c/i2c-dev.c:297) r6:00000001 r5:00000001 r4:84d92698 [<80eee268>] (i2cdev_ioctl_rdwr) from [<80eeee68>] (i2cdev_ioctl+0x2d4/0x34c drivers/i2c/i2c-dev.c:458) r10:83d86e50 r9:00000007 r8:8489a780 r7:20000240 r6:840ccc00 r5:00000707 r4:20000240 [<80eeeb94>] (i2cdev_ioctl) from [<804c8870>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80eeeb94>] (i2cdev_ioctl) from [<804c8870>] (do_vfs_ioctl fs/ioctl.c:830 [inline]) [<80eeeb94>] (i2cdev_ioctl) from [<804c8870>] (__do_sys_ioctl fs/ioctl.c:868 [inline]) [<80eeeb94>] (i2cdev_ioctl) from [<804c8870>] (sys_ioctl+0x110/0xa70 fs/ioctl.c:856) r6:8489a781 r5:00000000 r4:00000707 [<804c8760>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xece59fa8 to 0xece59ff0) 9fa0: 00000000 00000000 00000007 00000707 20000240 00000000 9fc0: 00000000 00000000 0014c2b8 00000036 7efe13d2 76b5b6d0 7efe1544 76b5b20c 9fe0: 76b5b020 76b5b010 00016f9c 0004df20 r10:00000036 r9:83ef0000 r8:80200288 r7:00000036 r6:0014c2b8 r5:00000000 r4:00000000 NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.1.0-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81791638>] (dump_backtrace) from [<8179172c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:8240c5e0 r5:60000093 r4:81d8757c [<81791714>] (show_stack) from [<817adb28>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81791714>] (show_stack) from [<817adb28>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817adae0>] (dump_stack_lvl) from [<817adb4c>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:00000001 [<817adb34>] (dump_stack) from [<8177f020>] (nmi_cpu_backtrace+0x170/0x18c lib/nmi_backtrace.c:111) [<8177eeb0>] (nmi_cpu_backtrace) from [<8177f1bc>] (nmi_trigger_cpumask_backtrace+0x180/0x228 lib/nmi_backtrace.c:62) r9:00000002 r8:8020fdd4 r7:00000000 r6:8240c5e0 r5:8240c49c r4:00000000 [<8177f03c>] (nmi_trigger_cpumask_backtrace) from [<80211058>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:854) r10:00000064 r9:000416c0 r8:82404d40 r7:00007f4b r6:8268d9a8 r5:8240c5fc r4:8406ec64 r3:00000001 [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b10>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b10>] (check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332b10>] (watchdog+0x4a8/0x590 kernel/hung_task.c:377) [<80332668>] (watchdog) from [<8026a024>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df819e4c r8:82ab3900 r7:00000000 r6:80332668 r5:828fae00 r4:82ab3840 [<80269f38>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:148) 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 r5:80269f38 r4:82ab3840 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2941 Comm: syz-fuzzer Not tainted 6.1.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x304f4 LR is at 0x2fb18 pc : [<000304f4>] lr : [<0002fb18>] psr: 20000010 sp : 02045f24 ip : 000001dc fp : 00000074 r10: 02000960 r9 : 0000006c r8 : 00000002 r7 : 66f62d77 r6 : 00000002 r5 : 66f30674 r4 : 0000000f r3 : 03cd8fc0 r2 : 00000040 r1 : 03d0f9e0 r0 : 00000008 Flags: nzCv IRQs on FIQs on Mode USER_32 ISA ARM Segment none Control: 30c5387d Table: 841ce380 DAC: 00000000 Backtrace: invalid frame pointer 0x00000074