INFO: task syz.6.5250:24560 blocked for more than 430 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.5250 state:D stack:0 pid:24560 tgid:24558 ppid:21621 task_flags:0x400140 flags:0x00000001 Call trace: [<81ab254c>] (__schedule) from [<80298890>] (__schedule_loop kernel/sched/core.c:6945 [inline]) [<81ab254c>] (__schedule) from [<80298890>] (rt_mutex_schedule+0x20/0x38 kernel/sched/core.c:7241) r10:8690e000 r9:00000002 r8:00000000 r7:eb081dd8 r6:eb081de0 r5:86066000 r4:86066000 [<80298870>] (rt_mutex_schedule) from [<81aba054>] (rt_mutex_slowlock_block.constprop.0+0x40/0x1d4 kernel/locking/rtmutex.c:1647) r5:86066000 r4:83253454 [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]) [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1760 [inline]) [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (rt_mutex_slowlock.constprop.0+0xd4/0x364 kernel/locking/rtmutex.c:1800) r10:60000013 r9:eb081de0 r8:00000002 r7:eb081dd8 r6:83253454 r5:00000000 r4:86066000 [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (__rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]) [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:49 [inline]) [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (rt_mutex_lock+0x44/0x48 kernel/locking/rtmutex_api.c:89) r10:86221040 r9:00000001 r8:86019000 r7:868d9b00 r6:868d9b00 r5:00000001 r4:83253440 [<81abb6dc>] (rt_mutex_lock) from [<81119400>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:849) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (i2c_lock_bus include/linux/i2c.h:809 [inline]) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:46 [inline]) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (i2c_transfer+0x9c/0x110 drivers/i2c/i2c-core-base.c:2313) [<8111b258>] (i2c_transfer) from [<8112077c>] (i2cdev_ioctl_rdwr+0x228/0x258 drivers/i2c/i2c-dev.c:306) r6:868d9b00 r5:00000001 r4:868d9b0c [<81120554>] (i2cdev_ioctl_rdwr) from [<811212f8>] (i2cdev_ioctl+0x354/0x418 drivers/i2c/i2c-dev.c:467) r10:86066000 r9:00000009 r8:89ade780 r7:00000707 r6:868d9b00 r5:86019000 r4:20000340 [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:583) r7:20000340 r6:89ade781 r5:00000000 r4:00000707 [<805854d8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xeb081fa8 to 0xeb081ff0) 1fa0: 00000000 00000000 00000009 00000707 20000340 00000000 1fc0: 00000000 00000000 00326310 00000036 00310000 00000000 00006364 76f320bc 1fe0: 76f31ec0 76f31eb0 000192bc 00132360 r10:00000036 r9:86066000 r8:8020029c r7:00000036 r6:00326310 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express Call trace: [<80201a74>] (dump_backtrace) from [<80201b70>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000113 r5:60000193 r4:822958fc [<80201b58>] (show_stack) from [<8021eeb4>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b58>] (show_stack) from [<8021eeb4>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021ee44>] (dump_stack_lvl) from [<8021eed8>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021eec0>] (dump_stack) from [<81a9c030>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a9bed0>] (nmi_cpu_backtrace) from [<81a9c17c>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c710 r5:8281af5c r4:ffffffff [<81a9c04c>] (nmi_trigger_cpumask_backtrace) from [<8022f818>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:00007f01 r8:8280c890 r7:0005b700 r6:00007f01 r5:82ac27e4 r4:00000048 [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (__sys_info lib/sys_info.c:157 [inline]) [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (sys_info+0x68/0xa8 lib/sys_info.c:165) [<81aa3c24>] (sys_info) from [<80383814>] (check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]) [<81aa3c24>] (sys_info) from [<80383814>] (watchdog+0x464/0x8a0 kernel/hung_task.c:515) r5:82ac27e4 r4:8331e30c [<803833b0>] (watchdog) from [<8027f6fc>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:803833b0 r7:832a3c00 r6:832a3c00 r5:832e1800 r4:00000001 [<8027f5d0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8d9fb0 to 0xdf8d9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8027f5d0 r4:83368e00 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3091 Comm: sshd-session Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express PC is at avtab_node_cmp security/selinux/ss/avtab.c:68 [inline] PC is at avtab_search_node+0xd0/0x134 security/selinux/ss/avtab.c:156 LR is at 0x438 pc : [<807c2ee4>] lr : [<00000438>] psr: a0010013 sp : df9a1bd8 ip : 862a9ab8 fp : df9a1bf4 r10: 84578a90 r9 : 84ccf144 r8 : df9a1d08 r7 : 1b873593 r6 : def8bb9c r5 : 9be07720 r4 : 0000000f r3 : 0000003d r2 : 000001d6 r1 : df9a1c34 r0 : 84c9af60 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 84bb5500 DAC: fffffffd Call trace: [<807c2e14>] (avtab_search_node) from [<807cbe48>] (context_struct_compute_av+0x1d0/0x4b4 security/selinux/ss/services.c:664) r7:df9a1db0 r6:84ccf140 r5:00000438 r4:00000000 [<807cbc78>] (context_struct_compute_av) from [<807ccc38>] (security_compute_av+0x170/0x2e8 security/selinux/ss/services.c:1177) r10:84f78f00 r9:84f7e000 r8:862a9b6c r7:00000000 r6:00000010 r5:862a9a00 r4:df9a1db0 [<807ccac8>] (security_compute_av) from [<807ad640>] (avc_compute_av+0x40/0x278 security/selinux/avc.c:992) r10:df9a1db0 r9:df9a1d08 r8:00000010 r7:00000058 r6:82aec0cc r5:00000058 r4:00000004 [<807ad600>] (avc_compute_av) from [<807add7c>] (avc_perm_nonode+0x60/0xc4 security/selinux/avc.c:1117) r10:00000058 r9:cc9e2d51 r8:df9a1db0 r7:00000010 r6:00000058 r5:00000058 r4:00000004 [<807add1c>] (avc_perm_nonode) from [<807aec28>] (avc_has_perm_noaudit+0x1a4/0x1dc security/selinux/avc.c:1160) r8:00000010 r7:00000058 r6:00000058 r5:00000004 r4:df9a1db0 [<807aea84>] (avc_has_perm_noaudit) from [<807aecb8>] (avc_has_perm+0x58/0xe8 security/selinux/avc.c:1195) r9:df9a1e1c r8:00000010 r7:00000058 r6:00000058 r5:844ea900 r4:00000004 [<807aec60>] (avc_has_perm) from [<807af248>] (inode_has_perm+0x60/0x74 security/selinux/hooks.c:1687) r9:84dec684 r8:824a35ec r7:856caa80 r6:00000004 r5:844ea900 r4:00000004 [<807af1e8>] (inode_has_perm) from [<807af414>] (file_has_perm+0xf4/0xfc security/selinux/hooks.c:1783) r4:85932240 [<807af320>] (file_has_perm) from [<807b8bc4>] (selinux_revalidate_file_permission security/selinux/hooks.c:3788 [inline]) [<807af320>] (file_has_perm) from [<807b8bc4>] (selinux_file_permission+0xe4/0x154 security/selinux/hooks.c:3809) r8:0000000c r7:845a5400 r6:84d1a0cc r5:00000002 r4:85932240 [<807b8ae0>] (selinux_file_permission) from [<8079f5a0>] (security_file_permission+0x1b0/0x1bc security/security.c:2366) r10:00000004 r9:00bf9560 r8:00000000 r7:00000002 r6:85932240 r5:00000002 r4:85932240 r3:807b8ae0 [<8079f3f0>] (security_file_permission) from [<80568130>] (rw_verify_area+0x5c/0x1a8 fs/read_write.c:473) r5:00000000 r4:0000007c [<805680d4>] (rw_verify_area) from [<8056af0c>] (vfs_write+0x6c/0x44c fs/read_write.c:677) r9:00bf9560 r8:00000000 r7:845a5400 r6:0000007c r5:85932240 r4:85932240 [<8056aea0>] (vfs_write) from [<8056b4b0>] (ksys_write+0xc8/0xe8 fs/read_write.c:738) r10:00000004 r9:845a5400 r8:8020029c r7:0000007c r6:00bf9560 r5:85932240 r4:85932240 [<8056b3e8>] (ksys_write) from [<8056b4e0>] (__do_sys_write fs/read_write.c:749 [inline]) [<8056b3e8>] (ksys_write) from [<8056b4e0>] (sys_write+0x10/0x14 fs/read_write.c:746) r7:00000004 r6:00000004 r5:00000000 r4:00000000 [<8056b4d0>] (sys_write) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xdf9a1fa8 to 0xdf9a1ff0) 1fa0: 00000000 00000000 00000004 00bf9560 0000007c 00000000 1fc0: 00000000 00000000 00000004 00000004 00000fcd 00000001 00000001 7ef6f2bc 1fe0: 00000001 7ef6f178 00000000 7697e590 INFO: task syz.6.5250:24560 blocked for more than 450 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.5250 state:D stack:0 pid:24560 tgid:24558 ppid:21621 task_flags:0x400140 flags:0x00000001 Call trace: [<81ab254c>] (__schedule) from [<80298890>] (__schedule_loop kernel/sched/core.c:6945 [inline]) [<81ab254c>] (__schedule) from [<80298890>] (rt_mutex_schedule+0x20/0x38 kernel/sched/core.c:7241) r10:8690e000 r9:00000002 r8:00000000 r7:eb081dd8 r6:eb081de0 r5:86066000 r4:86066000 [<80298870>] (rt_mutex_schedule) from [<81aba054>] (rt_mutex_slowlock_block.constprop.0+0x40/0x1d4 kernel/locking/rtmutex.c:1647) r5:86066000 r4:83253454 [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]) [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1760 [inline]) [<81aba014>] (rt_mutex_slowlock_block.constprop.0) from [<81abb3ac>] (rt_mutex_slowlock.constprop.0+0xd4/0x364 kernel/locking/rtmutex.c:1800) r10:60000013 r9:eb081de0 r8:00000002 r7:eb081dd8 r6:83253454 r5:00000000 r4:86066000 [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (__rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]) [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:49 [inline]) [<81abb2d8>] (rt_mutex_slowlock.constprop.0) from [<81abb720>] (rt_mutex_lock+0x44/0x48 kernel/locking/rtmutex_api.c:89) r10:86221040 r9:00000001 r8:86019000 r7:868d9b00 r6:868d9b00 r5:00000001 r4:83253440 [<81abb6dc>] (rt_mutex_lock) from [<81119400>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:849) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (i2c_lock_bus include/linux/i2c.h:809 [inline]) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:46 [inline]) [<811193ec>] (i2c_adapter_lock_bus) from [<8111b2f4>] (i2c_transfer+0x9c/0x110 drivers/i2c/i2c-core-base.c:2313) [<8111b258>] (i2c_transfer) from [<8112077c>] (i2cdev_ioctl_rdwr+0x228/0x258 drivers/i2c/i2c-dev.c:306) r6:868d9b00 r5:00000001 r4:868d9b0c [<81120554>] (i2cdev_ioctl_rdwr) from [<811212f8>] (i2cdev_ioctl+0x354/0x418 drivers/i2c/i2c-dev.c:467) r10:86066000 r9:00000009 r8:89ade780 r7:00000707 r6:868d9b00 r5:86019000 r4:20000340 [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:583) r7:20000340 r6:89ade781 r5:00000000 r4:00000707 [<805854d8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xeb081fa8 to 0xeb081ff0) 1fa0: 00000000 00000000 00000009 00000707 20000340 00000000 1fc0: 00000000 00000000 00326310 00000036 00310000 00000000 00006364 76f320bc 1fe0: 76f31ec0 76f31eb0 000192bc 00132360 r10:00000036 r9:86066000 r8:8020029c r7:00000036 r6:00326310 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express Call trace: [<80201a74>] (dump_backtrace) from [<80201b70>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000013 r5:60000093 r4:822958fc [<80201b58>] (show_stack) from [<8021eeb4>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b58>] (show_stack) from [<8021eeb4>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021ee44>] (dump_stack_lvl) from [<8021eed8>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021eec0>] (dump_stack) from [<81a9c030>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a9bed0>] (nmi_cpu_backtrace) from [<81a9c17c>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c710 r5:8281af5c r4:ffffffff [<81a9c04c>] (nmi_trigger_cpumask_backtrace) from [<8022f818>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:00007f11 r8:8280c890 r7:0005bf00 r6:00007f11 r5:82ac27e4 r4:00000048 [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (__sys_info lib/sys_info.c:157 [inline]) [<8022f800>] (arch_trigger_cpumask_backtrace) from [<81aa3c8c>] (sys_info+0x68/0xa8 lib/sys_info.c:165) [<81aa3c24>] (sys_info) from [<80383814>] (check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]) [<81aa3c24>] (sys_info) from [<80383814>] (watchdog+0x464/0x8a0 kernel/hung_task.c:515) r5:82ac27e4 r4:838ff90c [<803833b0>] (watchdog) from [<8027f6fc>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:803833b0 r7:832a3c00 r6:832a3c00 r5:832e1800 r4:00000001 [<8027f5d0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8d9fb0 to 0xdf8d9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8027f5d0 r4:83368e00 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 17190 Comm: syz.2.3418 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express PC is at i2c_versatile_getscl+0x14/0x20 drivers/i2c/busses/i2c-versatile.c:52 LR is at sclhi+0x64/0xa8 drivers/i2c/algos/i2c-algo-bit.c:86 pc : [<81125f24>] lr : [<81121de8>] psr: 20000113 sp : ec791d50 ip : ec791d60 fp : ec791d5c r10: 00000373 r9 : 824a9ec8 r8 : 00000042 r7 : 00000042 r6 : 0005bebb r5 : 82804d80 r4 : 832536f0 r3 : df8d2000 r2 : 00000064 r1 : 00000000 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85d48f00 DAC: fffffffd Call trace: [<81125f10>] (i2c_versatile_getscl) from [<81121de8>] (sclhi+0x64/0xa8 drivers/i2c/algos/i2c-algo-bit.c:86) [<81121d84>] (sclhi) from [<81122500>] (i2c_outb+0x58/0x118 drivers/i2c/algos/i2c-algo-bit.c:164) r6:824a9ec8 r5:00000006 r4:832536f0 [<811224a8>] (i2c_outb) from [<81122620>] (try_address+0x60/0x88 drivers/i2c/algos/i2c-algo-bit.c:326) r7:83253440 r6:45013708 r5:832536f0 r4:ffffff92 [<811225c0>] (try_address) from [<81122820>] (bit_doAddress drivers/i2c/algos/i2c-algo-bit.c:512 [inline]) [<811225c0>] (try_address) from [<81122820>] (bit_xfer+0x1d8/0x57c drivers/i2c/algos/i2c-algo-bit.c:552) r10:832536f0 r9:45013708 r8:00000000 r7:832536f0 r6:00000000 r5:00000200 r4:00000000 r3:00000021 [<81122648>] (bit_xfer) from [<8111aba0>] (__i2c_transfer+0x194/0x84c drivers/i2c/i2c-core-base.c:2261) r10:82804d80 r9:00030418 r8:00000000 r7:85d48740 r6:00000001 r5:8280c6c0 r4:83253440 [<8111aa0c>] (__i2c_transfer) from [<8111b304>] (i2c_transfer drivers/i2c/i2c-core-base.c:2317 [inline]) [<8111aa0c>] (__i2c_transfer) from [<8111b304>] (i2c_transfer+0xac/0x110 drivers/i2c/i2c-core-base.c:2293) r10:85d48180 r9:00000001 r8:84dfc000 r7:85d48740 r6:85d48740 r5:00000001 r4:83253440 [<8111b258>] (i2c_transfer) from [<8112077c>] (i2cdev_ioctl_rdwr+0x228/0x258 drivers/i2c/i2c-dev.c:306) r6:85d48740 r5:00000001 r4:85d4874c [<81120554>] (i2cdev_ioctl_rdwr) from [<811212f8>] (i2cdev_ioctl+0x354/0x418 drivers/i2c/i2c-dev.c:467) r10:8690e000 r9:00000006 r8:86ba19c0 r7:00000707 r6:85d48740 r5:84dfc000 r4:20000340 [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (do_vfs_ioctl fs/ioctl.c:551 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (__do_sys_ioctl fs/ioctl.c:595 [inline]) [<81120fa4>] (i2cdev_ioctl) from [<80585608>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:583) r7:20000340 r6:86ba19c1 r5:00000000 r4:00000707 [<805854d8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67) Exception stack(0xec791fa8 to 0xec791ff0) 1fa0: 00000000 00000000 00000006 00000707 20000340 00000000 1fc0: 00000000 00000000 00326310 00000036 00310000 00000000 00006364 76faa0bc 1fe0: 76fa9ec0 76fa9eb0 000192bc 00132360 r10:00000036 r9:8690e000 r8:8020029c r7:00000036 r6:00326310 r5:00000000 r4:00000000