INFO: task hung in process_measurement
Status: upstream: reported C repro on 2018/10/01 07:58
First crash: 616d, last: 206d

Cause bisection: introduced by (bisect log):

commit 8fe5616b20e5742bb5fee0e77dffe2fc76ac92a0
Author: Jyri Sarha <>
Date: Tue Jun 14 08:43:30 2016 +0000

  drm/tilcdc: Restore old dpms state in pm_resume()

Crash: INFO: task hung in process_measurement (log)
Repro: C syz .config

Fix bisection: the fix commit could be any of (bisect log):

  14c2a7b934e4 dt-bindings: dmaengine: nbpfaxi: Rename bindings documentation file
  7607a121f461 dmaengine: fsldma: Mark expected switch fall-through
  b48b8bc45a8f dmaengine: dw: Update Intel Elkhart Lake Service Engine acronym
  069e4a19f44d dmaengine: ti: unexport filter functions
  3a1144f83c53 MAINTAINERS: dmaengine: dw axi dmac: Fix typo in a path
  698f7a9be9b2 dmaengine: mv_xor_v2: Fix -Wshift-negative-value
  ba1cab79cfc6 dmaengine: fsl-edma: implement .device_synchronize callback
  4f48e29f7673 dmaengine: make mux_configure32 static
  d1b622f68daf dmaengine: pl330: use the same attributes when freeing pl330->mcode_cpu
  057b05d5ac47 dmaengine: qcom: hidma_mgmt: Add of_node_put() before goto
  d071fd294f24 dmaengine: change alignment of mux_configure32 and fsl_edma_chan_mux
  232a7f18cf8e dmaengine: fsl-edma: add i.mx7ulp edma2 version support
  a6bc332373e5 dmaengine: acpi: Set up DMA mask based on CSRT
  4b8584bac040 dmaengine: acpi: Add kernel doc parameter descriptions
  719e25dba443 dmaengine: qcom_hidma: Remove call to memset after dmam_alloc_coherent
  9603a7ab6098 dmaengine: imx-sdma: Remove call to memset after dma_alloc_coherent
  ae923c91aa3b dmaengine: dw: Export struct dw_dma_chip_pdata for wider use
  b3757413b91e dmaengine: dw: platform: Use struct dw_dma_chip_pdata
  e17be6e1b713 dmaengine: Remove dev_err() usage after platform_get_irq()
  7f5d7425748d dmaengine: imx-dma: Mark expected switch fall-through
  f8d9ddbc2851 dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake
  a9afc9ea9399 dmaengine: tegra210-adma: Don't program FIFO threshold
  a9c56721d6ae dmaengine: dw: platform: Use devm_platform_ioremap_resource()
  57dbd0e4b97d dmaengine: stm32-mdma: Switch to use device_property_count_u32()
  e7b8514e4d68 dmaengine: dw: platform: Switch to acpi_dma_controller_register()
  2cb114c4fac7 dmaengine: stm32-dmamux: Switch to use device_property_count_u32()
  84da042e7023 dmaengine: dw: platform: Move handle check to dw_dma_acpi_controller_register()
  b685fe26e9af dmaengine: dw: platform: Split ACPI helpers to separate module
  ffbb569b9cee dt-bindings: dmaengine: shdma: Rename bindings documentation file
  edd14218bd66 dt-bindings: dmaengine: Convert Allwinner A31 and A64 DMA to a schema
  f5e84eae7956 dmaengine: dw: platform: Split OF helpers to separate module
  545a29c811f6 dt-bindings: dmaengine: Convert Allwinner A10 DMA to a schema
  e3b9fef8ddf8 dmaengine: ti: edma: Remove 'Assignment in if condition'
  7a09c09c3007 dmaengine: ti: omap-dma: Remove 'Assignment in if condition'
  b37e3534ac42 dt-bindings: dmaengine: Add YAML schemas for the generic DMA bindings
  9fa2df6eafa0 dmaengine: ti: omap-dma: Remove variable override in omap_dma_tx_status()
  aa3c6ce4eab8 dmaengine: ti: edma: Support for polled (memcpy) completion
  097ffdc75259 dmaengine: ti: edma: Correct the residue calculation (fix for memcpy)
  fb9816f9d05f dmaengine: dmatest: Add support for completion polling
  09104bb1b5d4 dmaengine: iop-adma: remove set but not used variable 'slots_per_op'
  e96b1f64ee28 dmaengine: ti: edma: Clean up the 2x32bit array register accesses
  25af5afe77a8 dmanegine: ioat/dca: Use struct_size() helper
  4689d35c765c dmaengine: ti: omap-dma: Improved memcpy polling support
  37256335bd06 dt-bindings: dmaengine: dma-common: Fix the dma-channel-mask property
  aac8670369dc dmaengine: ti: omap-dma: Readability cleanup in omap_dma_tx_status()
  402096cb5b7d dmaengine: stm32-dma: Use struct_size() helper
  f4c255f1a747 dmaengine: dma-jz4780: Break descriptor chains on JZ4740
  156a599b0716 dmaengine: tegra-apb: Support per-burst residue granularity
  d17d9ea95727 dmaengine: iop-adma.c: fix printk format warning
  72503b25ee36 dmaengine: bcm2835: Print error in case setting DMA mask fails
  c5dbe60664b3 dmaengine: ti: edma: Do not reset reserved paRAM slots
  b2003f61a554 dmaengine: ti: edma: Only reset region0 access registers
  d2bfe7b5d182 dmaengine: edma: make edma_filter_fn private
  9c71b9eb3cb2 dmaengine: omap-dma: make omap_dma_filter_fn private
  c5c6faaee6e0 dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits()
  04cbfba62085 Merge tag 'dmaengine-5.4-rc1' of git://
similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.19 INFO: task hung in process_measurement 2 188d 263d 0/1 auto-closed as invalid on 2020/03/29 20:33
linux-4.14 INFO: task hung in process_measurement 3 83d 139d 0/1 upstream: reported on 2020/01/19 02:28

Sample crash report:

Crashes (49):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-root 2019/02/23 17:19 upstream cb268d80 18107ce0 .config log report syz C,,,,,,
ci-upstream-kasan-gce-selinux-root 2018/09/30 16:22 upstream 291d0e5d 41e4b329 .config log report syz C,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/02/23 14:16 linux-next 94a47529 18107ce0 .config log report syz C,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/09/30 17:19 linux-next 4794a36b 41e4b329 .config log report syz C,,,,,,
ci-upstream-kasan-gce-smack-root 2019/11/13 02:00 upstream 100d46bd 048f2d49 .config log report,,,,,,
ci-upstream-kasan-gce-root 2019/08/17 08:19 upstream 2d63ba3e 8fd428a1 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2019/07/26 17:32 upstream 6789f873 3e5d1beb .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2019/03/11 16:41 upstream 12ad143e 12365b99 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2019/02/03 17:59 upstream 12491ed3 c198d5dd .config log report,,,,,,
ci-upstream-kasan-gce-root 2019/01/25 10:21 upstream d73aba11 b5d78bce .config log report,,,,,,
ci-upstream-kasan-gce-selinux-root 2019/01/05 01:57 upstream 96d4f267 0127e3ba .config log report,,,,,,
ci-upstream-kasan-gce-root 2018/12/14 06:58 upstream 65e08c5e fe7127be .config log report,,,,,,
ci-upstream-kasan-gce-root 2018/11/24 10:51 upstream 7c98a426 ecc7c870 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/11/22 16:51 upstream 92b41928 2ee77802 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/11/20 01:08 upstream f2ce1065 adf636a8 .config log report,,,,,,
ci-upstream-kasan-gce-selinux-root 2018/11/18 15:42 upstream 1ce80e0f adf636a8 .config log report,,,,,,
ci-upstream-kasan-gce-root 2018/11/14 13:35 upstream ccda4af0 5f5f6d14 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/10/22 14:32 upstream 84df9525 ecb386fe .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/10/16 00:33 upstream f0a7d188 8cd30605 .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/10/11 00:14 upstream b8db9e69 5f818b4b .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/10/08 23:42 upstream 0854ba5f 8b311eaf .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/10/05 05:04 upstream 10be83cc 8b311eaf .config log report,,,,,,
ci-upstream-kasan-gce-smack-root 2018/09/30 11:59 upstream 291d0e5d 41e4b329 .config log report,,,,,,
ci-upstream-kasan-gce-selinux-root 2018/09/30 11:59 upstream 291d0e5d 41e4b329 .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/09 04:04 net e2a322a0 8b311eaf .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/06 14:47 net 35f3625c 8b311eaf .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/03 13:54 net 45ec3185 0f3e0261 .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/02 23:23 net ad5f97fa a316a2af .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/02 08:04 net 1ad98e9d e06f7713 .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/10/01 06:50 net 43955a45 41e4b329 .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/09/30 20:03 net 43955a45 41e4b329 .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/09/28 08:01 net d4ce5808 0c2fa87b .config log report,,,,,,
ci-upstream-net-this-kasan-gce 2018/09/28 06:44 net d4ce5808 0c2fa87b .config log report,,,,,,
ci-upstream-net-kasan-gce 2019/03/12 22:30 net-next d9862cfb a71bfb62 .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/26 14:20 net-next 44adbac8 a8292de9 .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/25 11:17 net-next 44adbac8 a8292de9 .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/20 02:03 net-next 9333f207 ecb386fe .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/17 14:24 net-next aadd4355 1ba7fd7e .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/08 02:25 net-next 5057ef7f 8b311eaf .config log report,,,,,,
ci-upstream-net-kasan-gce 2018/10/07 17:28 net-next 72438f8c 8b311eaf .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/01/13 11:19 linux-next b808822a c3f3344c .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2019/01/08 02:56 linux-next a85b6b4f 69d69aa9 .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/11/26 06:28 linux-next 442b8cea 3d3ec907 .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/11/18 21:54 linux-next 442b8cea adf636a8 .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/11/16 21:24 linux-next 442b8cea b08ee62a .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/10/10 07:46 linux-next 7f304930 8b311eaf .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/10/10 01:44 linux-next 570b7bde 8b311eaf .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/10/02 17:13 linux-next 62f3d259 a316a2af .config log report,,,,,,
ci-upstream-linux-next-kasan-gce-root 2018/09/30 12:00 linux-next 4794a36b 41e4b329 .config log report,,,,,,