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INFO: task hung in i2c_transfer (3)

Status: auto-obsoleted due to no activity on 2023/07/20 22:15
Subsystems: i2c
[Documentation on labels]
First crash: 1072d, last: 859d
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in i2c_transfer (4) i2c 1 3 516d 528d 0/29 auto-obsoleted due to no activity on 2024/06/27 07:25
upstream INFO: task hung in i2c_transfer i2c 1 1 1531d 1531d 0/29 auto-closed as invalid on 2021/09/16 19:15
upstream INFO: task hung in i2c_transfer (2) i2c 1 1 1233d 1233d 0/29 auto-closed as invalid on 2022/07/11 10:46

Sample crash report:
INFO: task syz-executor.1:30320 blocked for more than 430 seconds.
      Not tainted 6.3.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:0     pid:30320 ppid:30250  flags:0x00000001
Backtrace: 
[<817d231c>] (__schedule) from [<817d2f90>] (schedule+0x5c/0xac kernel/sched/core.c:6701)
 r10:83df8000 r9:00000000 r8:00000002 r7:00000000 r6:ec959e10 r5:8587dc00
 r4:8587dc00
[<817d2f34>] (schedule) from [<817d8144>] (rt_mutex_slowlock_block.constprop.0+0x38/0x164 kernel/locking/rtmutex.c:1558)
 r5:8587dc00 r4:8294e854
[<817d810c>] (rt_mutex_slowlock_block.constprop.0) from [<817d930c>] (__rt_mutex_slowlock.constprop.0+0x78/0x258 kernel/locking/rtmutex.c:1626)
 r10:8d33bccc r9:8d33bc80 r8:ec959e10 r7:00000002 r6:8294e854 r5:00000000
 r4:8587dc00 r3:ec959e10
[<817d9294>] (__rt_mutex_slowlock.constprop.0) from [<817d9598>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1662 [inline])
[<817d9294>] (__rt_mutex_slowlock.constprop.0) from [<817d9598>] (rt_mutex_slowlock kernel/locking/rtmutex.c:1691 [inline])
[<817d9294>] (__rt_mutex_slowlock.constprop.0) from [<817d9598>] (__rt_mutex_lock kernel/locking/rtmutex.c:1703 [inline])
[<817d9294>] (__rt_mutex_slowlock.constprop.0) from [<817d9598>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline])
[<817d9294>] (__rt_mutex_slowlock.constprop.0) from [<817d9598>] (rt_mutex_lock+0xac/0xc4 kernel/locking/rtmutex_api.c:71)
 r9:8d33bc80 r8:8d33bcc0 r7:00000004 r6:a0000013 r5:8294e854 r4:00000000
[<817d94ec>] (rt_mutex_lock) from [<80f0ac6c>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:823)
 r6:8d33bc80 r5:00000004 r4:8294e840
[<80f0ac58>] (i2c_adapter_lock_bus) from [<80f0c9c0>] (i2c_lock_bus include/linux/i2c.h:797 [inline])
[<80f0ac58>] (i2c_adapter_lock_bus) from [<80f0c9c0>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:44 [inline])
[<80f0ac58>] (i2c_adapter_lock_bus) from [<80f0c9c0>] (i2c_transfer+0x94/0x134 drivers/i2c/i2c-core-base.c:2260)
[<80f0c92c>] (i2c_transfer) from [<80f119e0>] (i2cdev_ioctl_rdwr+0x1f8/0x234 drivers/i2c/i2c-dev.c:297)
 r6:00000003 r5:00000003 r4:8d33bcb0
[<80f117e8>] (i2cdev_ioctl_rdwr) from [<80f123a4>] (i2cdev_ioctl+0x2d4/0x34c drivers/i2c/i2c-dev.c:458)
 r10:839c6a50 r9:00000004 r8:84fdc780 r7:20000200 r6:84042000 r5:00000707
 r4:20000200
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (do_vfs_ioctl fs/ioctl.c:830 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (__do_sys_ioctl fs/ioctl.c:868 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (sys_ioctl+0x110/0xa70 fs/ioctl.c:856)
 r6:84fdc781 r5:00000000 r4:00000707
[<804d3bcc>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xec959fa8 to 0xec959ff0)
9fa0:                   00000000 00000000 00000004 00000707 20000200 00000000
9fc0: 00000000 00000000 0014c2b8 00000036 7ee5a3c2 76b046d0 7ee5a534 76b0420c
9fe0: 76b04020 76b04010 00017004 0004dfb0
 r10:00000036 r9:8587dc00 r8:80200288 r7:00000036 r6:0014c2b8 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.3.0-rc7-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<817b2528>] (dump_backtrace) from [<817b261c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:000d0013 r5:600d0093 r4:81d901d4
[<817b2604>] (show_stack) from [<817cec84>] (__dump_stack lib/dump_stack.c:88 [inline])
[<817b2604>] (show_stack) from [<817cec84>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<817cec3c>] (dump_stack_lvl) from [<817ceca8>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:00000001
[<817cec90>] (dump_stack) from [<8179ffc4>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113)
[<8179fe64>] (nmi_cpu_backtrace) from [<817a0114>] (nmi_trigger_cpumask_backtrace+0x134/0x1dc lib/nmi_backtrace.c:62)
 r7:8240c498 r6:00000000 r5:8241a844 r4:00000000
[<8179ffe0>] (nmi_trigger_cpumask_backtrace) from [<80210d80>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:854)
 r9:000a2540 r8:82404d40 r7:00007f49 r6:82693168 r5:8240c604 r4:850d1a64
[<80210d68>] (arch_trigger_cpumask_backtrace) from [<803330b4>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline])
[<80210d68>] (arch_trigger_cpumask_backtrace) from [<803330b4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline])
[<80210d68>] (arch_trigger_cpumask_backtrace) from [<803330b4>] (watchdog+0x498/0x59c kernel/hung_task.c:379)
[<80332c1c>] (watchdog) from [<8026abc0>] (kthread+0xec/0x11c kernel/kthread.c:376)
 r10:00000000 r9:df819e4c r8:82abca40 r7:00000000 r6:80332c1c r5:828fae00
 r4:82abc980
[<8026aad4>] (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 r5:8026aad4 r4:82abc980
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 30213 Comm: syz-executor.1 Not tainted 6.3.0-rc7-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at arch_timer_read_counter_long+0x1c/0x20 arch/arm/kernel/arch_timer.c:20
LR is at arch_timer_read_counter_long+0x1c/0x20 arch/arm/kernel/arch_timer.c:19
pc : [<802119f0>]    lr : [<802119f0>]    psr: a0000113
sp : ec7c1d20  ip : ec7c1d20  fp : ec7c1d2c
r10: 0009a911  r9 : 81f64550  r8 : 00000040
r7 : ffffffff  r6 : 275eff12  r5 : 00000752  r4 : 82725248
r3 : 811101f4  r2 : 000346dc  r1 : 00000065  r0 : 275f065a
Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 90215300  DAC: 00000000
Backtrace: 
[<802119d4>] (arch_timer_read_counter_long) from [<81785a20>] (read_current_timer arch/arm/lib/delay.c:35 [inline])
[<802119d4>] (arch_timer_read_counter_long) from [<81785a20>] (__timer_delay+0x40/0x68 arch/arm/lib/delay.c:49)
[<817859e0>] (__timer_delay) from [<81785aa8>] (__timer_const_udelay arch/arm/lib/delay.c:57 [inline])
[<817859e0>] (__timer_delay) from [<81785aa8>] (__timer_udelay+0x34/0x38 arch/arm/lib/delay.c:62)
 r7:ffffffff r6:000a2546 r5:82404d40 r4:8294eae0
[<81785a74>] (__timer_udelay) from [<80f12ebc>] (sclhi+0x78/0x9c drivers/i2c/algos/i2c-algo-bit.c:109)
[<80f12e44>] (sclhi) from [<80f13624>] (i2c_outb+0xc4/0x118 drivers/i2c/algos/i2c-algo-bit.c:179)
 r7:ffffffff r6:00000040 r5:81f64550 r4:8294eae0
[<80f13560>] (i2c_outb) from [<80f136d8>] (try_address+0x60/0x88 drivers/i2c/algos/i2c-algo-bit.c:326)
 r7:8294e840 r6:7df88731 r5:8294eae0 r4:00000000
[<80f13678>] (try_address) from [<80f1382c>] (bit_doAddress drivers/i2c/algos/i2c-algo-bit.c:512 [inline])
[<80f13678>] (try_address) from [<80f1382c>] (bit_xfer+0x12c/0x58c drivers/i2c/algos/i2c-algo-bit.c:552)
 r10:8240c440 r9:82404d40 r8:7df88731 r7:8294eae0 r6:81f64550 r5:00000000
 r4:00000000 r3:00000820
[<80f13700>] (bit_xfer) from [<80f0c264>] (__i2c_transfer drivers/i2c/i2c-core-base.c:2203 [inline])
[<80f13700>] (bit_xfer) from [<80f0c264>] (__i2c_transfer+0x178/0x840 drivers/i2c/i2c-core-base.c:2168)
 r10:8240c440 r9:82404d40 r8:00000000 r7:8d3ff4c0 r6:00000004 r5:000935fd
 r4:8294e840
[<80f0c0ec>] (__i2c_transfer) from [<80f0c9d0>] (i2c_transfer+0xa4/0x134 drivers/i2c/i2c-core-base.c:2264)
 r10:85453a4c r9:8d3ff4c0 r8:85453a40 r7:00000004 r6:8d3ff4c0 r5:00000004
 r4:8294e840
[<80f0c92c>] (i2c_transfer) from [<80f119e0>] (i2cdev_ioctl_rdwr+0x1f8/0x234 drivers/i2c/i2c-dev.c:297)
 r6:00000003 r5:00000003 r4:8d3ff4f0
[<80f117e8>] (i2cdev_ioctl_rdwr) from [<80f123a4>] (i2cdev_ioctl+0x2d4/0x34c drivers/i2c/i2c-dev.c:458)
 r10:839c6a50 r9:00000004 r8:85435840 r7:20000200 r6:83d39000 r5:00000707
 r4:20000200
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (do_vfs_ioctl fs/ioctl.c:830 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (__do_sys_ioctl fs/ioctl.c:868 [inline])
[<80f120d0>] (i2cdev_ioctl) from [<804d3cdc>] (sys_ioctl+0x110/0xa70 fs/ioctl.c:856)
 r6:85435841 r5:00000000 r4:00000707
[<804d3bcc>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xec7c1fa8 to 0xec7c1ff0)
1fa0:                   00000000 00000000 00000004 00000707 20000200 00000000
1fc0: 00000000 00000000 0014c2b8 00000036 7ef0c3c2 76ba76d0 7ef0c534 76ba720c
1fe0: 76ba7020 76ba7010 00017004 0004dfb0
 r10:00000036 r9:83df8000 r8:80200288 r7:00000036 r6:0014c2b8 r5:00000000
 r4:00000000

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/21 22:13 upstream 2af3e53a4dc0 2b32bd34 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2023/04/10 14:14 upstream 09a9639e56c0 71147e29 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2023/02/22 00:06 upstream 89f5349e0673 ec0a9fe9 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2023/02/07 12:16 upstream 05ecb680708a 5bc3be51 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2023/02/07 00:19 upstream d2d11f342b17 0a9c11b6 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2022/12/24 03:59 upstream a27405b2ed9c 9da18ae8 .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2022/10/17 02:28 upstream 493ffd6605b2 67cb024c .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2022/09/21 03:43 upstream 60891ec99e14 c4b8ccfd .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
2022/09/20 17:48 upstream 521a547ced64 7c41a9ba .config console log report info ci-qemu2-arm32 INFO: task hung in i2c_transfer
* Struck through repros no longer work on HEAD.