INFO: task syz-executor.0:17973 blocked for more than 430 seconds. Not tainted 6.2.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:17973 ppid:17904 flags:0x00000001 Backtrace: [<817c1730>] (__schedule) from [<817c2258>] (schedule+0x5c/0xac kernel/sched/core.c:6682) r10:86062e00 r9:00000000 r8:00000002 r7:00000000 r6:ec9d5e08 r5:84a5a280 r4:84a5a280 [<817c21fc>] (schedule) from [<817c704c>] (rt_mutex_slowlock_block.constprop.0+0x38/0x164 kernel/locking/rtmutex.c:1557) r5:84a5a280 r4:8294a054 [<817c7014>] (rt_mutex_slowlock_block.constprop.0) from [<817c8214>] (__rt_mutex_slowlock.constprop.0+0x78/0x270 kernel/locking/rtmutex.c:1625) r10:000000b5 r9:84a5a280 r8:ec9d5e08 r7:00000002 r6:8294a054 r5:00000000 r4:84a5a280 r3:ec9d5e08 [<817c819c>] (__rt_mutex_slowlock.constprop.0) from [<817c84b8>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1661 [inline]) [<817c819c>] (__rt_mutex_slowlock.constprop.0) from [<817c84b8>] (rt_mutex_slowlock kernel/locking/rtmutex.c:1690 [inline]) [<817c819c>] (__rt_mutex_slowlock.constprop.0) from [<817c84b8>] (__rt_mutex_lock kernel/locking/rtmutex.c:1702 [inline]) [<817c819c>] (__rt_mutex_slowlock.constprop.0) from [<817c84b8>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline]) [<817c819c>] (__rt_mutex_slowlock.constprop.0) from [<817c84b8>] (rt_mutex_lock+0xac/0xc4 kernel/locking/rtmutex_api.c:71) r9:84a5a280 r8:00000000 r7:8885d800 r6:a0000013 r5:8294a054 r4:00000000 [<817c840c>] (rt_mutex_lock) from [<80ef7988>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:827) r6:ec9d5ea0 r5:00000001 r4:8294a040 [<80ef7974>] (i2c_adapter_lock_bus) from [<80ef9704>] (i2c_lock_bus include/linux/i2c.h:793 [inline]) [<80ef7974>] (i2c_adapter_lock_bus) from [<80ef9704>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:44 [inline]) [<80ef7974>] (i2c_adapter_lock_bus) from [<80ef9704>] (i2c_transfer+0x94/0x134 drivers/i2c/i2c-core-base.c:2166) [<80ef9670>] (i2c_transfer) from [<80ef97fc>] (i2c_transfer_buffer_flags+0x58/0x8c drivers/i2c/i2c-core-base.c:2198) r6:8534a840 r5:00000010 r4:00000000 [<80ef97a4>] (i2c_transfer_buffer_flags) from [<80efe4e0>] (i2c_master_send include/linux/i2c.h:110 [inline]) [<80ef97a4>] (i2c_transfer_buffer_flags) from [<80efe4e0>] (i2cdev_write+0x50/0x90 drivers/i2c/i2c-dev.c:175) r4:00000000 [<80efe490>] (i2cdev_write) from [<804b1930>] (vfs_write+0xb0/0x3bc fs/read_write.c:582) r7:ec9d5f78 r6:00000000 r5:8534a840 r4:80efe490 [<804b1880>] (vfs_write) from [<804b20cc>] (ksys_pwrite64 fs/read_write.c:699 [inline]) [<804b1880>] (vfs_write) from [<804b20cc>] (__do_sys_pwrite64 fs/read_write.c:709 [inline]) [<804b1880>] (vfs_write) from [<804b20cc>] (sys_pwrite64+0xa0/0xd0 fs/read_write.c:706) r10:000000b5 r9:84a5a280 r8:80200288 r7:00000000 r6:8534a840 r5:00000000 r4:8534a841 [<804b202c>] (sys_pwrite64) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xec9d5fa8 to 0xec9d5ff0) 5fa0: 00000000 00000000 00000003 00000000 00000000 00000000 5fc0: 00000000 00000000 0014c34c 000000b5 7edef3d2 76b656d0 7edef544 76b6520c 5fe0: 76b65020 76b65010 00016fec 0004dfa0 r7:000000b5 r6:0014c34c r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<817a2a48>] (dump_backtrace) from [<817a2b3c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:8240c5e0 r5:60000193 r4:81d8a418 [<817a2b24>] (show_stack) from [<817befd0>] (__dump_stack lib/dump_stack.c:88 [inline]) [<817a2b24>] (show_stack) from [<817befd0>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817bef88>] (dump_stack_lvl) from [<817beff4>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000001 r4:00000001 [<817befdc>] (dump_stack) from [<81790430>] (nmi_cpu_backtrace+0x170/0x18c lib/nmi_backtrace.c:111) [<817902c0>] (nmi_cpu_backtrace) from [<817905cc>] (nmi_trigger_cpumask_backtrace+0x180/0x228 lib/nmi_backtrace.c:62) r9:00000002 r8:8020fdd4 r7:00000001 r6:8240c5e0 r5:8240c49c r4:00000000 [<8179044c>] (nmi_trigger_cpumask_backtrace) from [<80211058>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:854) r10:00000064 r9:00090640 r8:82404d40 r7:00007f32 r6:8268e9a8 r5:8240c5fc r4:86073264 r3:00000001 [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332d6c>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332d6c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]) [<80211040>] (arch_trigger_cpumask_backtrace) from [<80332d6c>] (watchdog+0x4a8/0x590 kernel/hung_task.c:377) [<803328c4>] (watchdog) from [<8026a00c>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df819e4c r8:82ab39c0 r7:00000000 r6:803328c4 r5:828fae00 r4:82ab3900 [<80269f20>] (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 r5:80269f20 r4:82ab3900 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2736 Comm: klogd Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76e4e9bc LR is at 0x76e494c0 pc : [<76e4e9bc>] lr : [<76e494c0>] psr: 20070010 sp : 7ec67bd8 ip : 00000000 fp : 00000000 r10: 76f1f764 r9 : 00000000 r8 : 00002000 r7 : 76f77080 r6 : 00019be8 r5 : 00000000 r4 : 0075a420 r3 : 0075a440 r2 : 00001fe4 r1 : 00000000 r0 : 0075a420 Flags: nzCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 84209d00 DAC: fffffffd Backtrace: no frame pointer