While running LTP controllers tests on arm64 Raspberry Pi 4 Model B the following kernel crash noticed.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
metadata: git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git_sha: 88084a3df1672e131ddc1b4e39eeacfd39864acf kernel_version: 5.19.0-rc5 kernel-config: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/config build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/5... artifact-location: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh vmlinux.xz: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/vmlinux.xz System.map: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/System.map toolchain: gcc-11
Steps to reproduce: ------------------- ./runltp -p -q -f controllers
Test log: ---------- cgroup_fj_stress_blkio_4_4_each 1 TPASS: All done! cgroup_fj_stress_blkio_4_4_each 2 TINFO: Removing all ltp subgroups... cgroup_fj_stress_blkio_2_9_each 1 TINFO: Subsystem blkio is mounted at /sys/fs/cgroup/blkio cgroup_fj_stress_blkio_2_9_each 1 TINFO: Creating subgroups ... [ 2414.973441] Unable to handle kernel paging request at virtual address 00620000090336a0 [ 2414.981581] Mem abort info: [ 2414.984480] ESR = 0x0000000086000004 [ 2414.988323] EC = 0x21: IABT (current EL), IL = 32 bits [ 2414.993765] SET = 0, FnV = 0 [ 2414.996905] EA = 0, S1PTW = 0 [ 2415.000124] FSC = 0x04: level 0 translation fault [ 2415.005118] [00620000090336a0] address between user and kernel address ranges [ 2415.012393] Internal error: Oops: 86000004 [#1] PREEMPT SMP [ 2415.018048] Modules linked in: btrfs blake2b_generic libcrc32c raid6_pq zstd_compress xhci_pci snd_soc_hdmi_codec xhci_pci_renesas raspberrypi_cpufreq hci_uart btqca brcmfmac brcmutil btbcm vc4 bluetooth cfg80211 cec drm_display_helper drm_cma_helper rfkill clk_raspberrypi reset_raspberrypi drm_kms_helper crct10dif_ce raspberrypi_hwmon drm i2c_bcm2835 iproc_rng200 rng_core pwm_bcm2835 bcm2711_thermal pcie_brcmstb fuse [ 2415.055725] CPU: 0 PID: 11626 Comm: cgroup_fj_stres Not taintedlinu#1 [ 2415.062965] Hardware name: Raspberry Pi 4 Model B (DT) [ 2415.068175] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2415.075238] pc : 0x620000090336a0 [ 2415.078600] lr : ktime_get+0x50/0xac [ 2415.082228] sp : ffff80000dfdbb90 [ 2415.085585] x29: ffff80000dfdbb90 x28: 00000000ffffffff x27: ffff00006405e580 [ 2415.092832] x26: ffff00006405e748 x25: 0000000001200000 x24: ffff00006405e180 [ 2415.100076] x23: ffff80000dfdbd68 x22: 0000000000000000 x21: 000002321545f201 [ 2415.107320] x20: 000000000012017e x19: ffff80000ae3b440 x18: ffff000000000000 [ 2415.114564] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000dc [ 2415.121809] x14: 0000000001200011 x13: 0000000060000000 x12: 0000ffffa7b6c1e8 [ 2415.129052] x11: 0000000000000040 x10: ffff80000a96c5c0 x9 : ffff8000080990d4 [ 2415.136295] x8 : 0000000000000000 x7 : 0000000000a9c84a x6 : 4480001ec1769752 [ 2415.143538] x5 : 00ffbffeffffffff x4 : 0000000900000000 x3 : 0000000000000000 [ 2415.150781] x2 : ffff80000a94e000 x1 : ffff8000090336a0 x0 : ffff80000ad102f0 [ 2415.158025] Call trace: [ 2415.160498] 0x620000090336a0 [ 2415.163505] copy_process+0xe34/0x1534 [ 2415.167307] kernel_clone+0x98/0x430 [ 2415.170931] __do_sys_clone+0x70/0xb0 [ 2415.174643] __arm64_sys_clone+0x2c/0x40 [ 2415.178621] invoke_syscall+0x50/0x120 [ 2415.182425] el0_svc_common.constprop.0+0x104/0x124 [ 2415.187375] do_el0_svc+0x3c/0xcc [ 2415.190736] el0_svc+0x38/0xc0 [ 2415.193832] el0t_64_sync_handler+0xbc/0x140 [ 2415.198162] el0t_64_sync+0x18c/0x190 [ 2415.201880] Code: bad PC value [ 2415.204975] ---[ end trace 0000000000000000 ]--- [ 2435.982529] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 2435.988717] rcu: 0-...0: (8 ticks this GP) idle=c29/1/0x4000000000000000 softirq=479942/479942 fqs=2433 [ 2435.998423] (detected by 2, t=5255 jiffies, g=905669, q=285 ncpus=4) [ 2436.004953] Task dump for CPU 0: [ 2436.008218] task:cgroup_fj_stres state:R running task stack: 0 pid:11626 ppid: 502 flags:0x00000202 [ 2436.018278] Call trace: [ 2436.020749] __switch_to+0xf0/0x160 [ 2436.024291] 0x3600d98dadcfb700 [ 2499.046529] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
full log links, https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v5.19-rc5/tes... https://lkft.validation.linaro.org/scheduler/job/5238392
-- Linaro LKFT https://lkft.linaro.org
On Mon, Jul 04, 2022 at 01:28:30PM +0530, Naresh Kamboju wrote:
While running LTP controllers tests on arm64 Raspberry Pi 4 Model B the following kernel crash noticed.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
metadata: git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git_sha: 88084a3df1672e131ddc1b4e39eeacfd39864acf kernel_version: 5.19.0-rc5 kernel-config: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/config build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/5... artifact-location: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh vmlinux.xz: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/vmlinux.xz System.map: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/System.map toolchain: gcc-11
Steps to reproduce:
./runltp -p -q -f controllers
Test log:
cgroup_fj_stress_blkio_4_4_each 1 TPASS: All done! cgroup_fj_stress_blkio_4_4_each 2 TINFO: Removing all ltp subgroups... cgroup_fj_stress_blkio_2_9_each 1 TINFO: Subsystem blkio is mounted at /sys/fs/cgroup/blkio cgroup_fj_stress_blkio_2_9_each 1 TINFO: Creating subgroups ... [ 2414.973441] Unable to handle kernel paging request at virtual address 00620000090336a0 [ 2414.981581] Mem abort info: [ 2414.984480] ESR = 0x0000000086000004 [ 2414.988323] EC = 0x21: IABT (current EL), IL = 32 bits [ 2414.993765] SET = 0, FnV = 0 [ 2414.996905] EA = 0, S1PTW = 0 [ 2415.000124] FSC = 0x04: level 0 translation fault [ 2415.005118] [00620000090336a0] address between user and kernel address ranges [ 2415.012393] Internal error: Oops: 86000004 [#1] PREEMPT SMP [ 2415.018048] Modules linked in: btrfs blake2b_generic libcrc32c raid6_pq zstd_compress xhci_pci snd_soc_hdmi_codec xhci_pci_renesas raspberrypi_cpufreq hci_uart btqca brcmfmac brcmutil btbcm vc4 bluetooth cfg80211 cec drm_display_helper drm_cma_helper rfkill clk_raspberrypi reset_raspberrypi drm_kms_helper crct10dif_ce raspberrypi_hwmon drm i2c_bcm2835 iproc_rng200 rng_core pwm_bcm2835 bcm2711_thermal pcie_brcmstb fuse [ 2415.055725] CPU: 0 PID: 11626 Comm: cgroup_fj_stres Not taintedlinu#1 [ 2415.062965] Hardware name: Raspberry Pi 4 Model B (DT) [ 2415.068175] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2415.075238] pc : 0x620000090336a0 [ 2415.078600] lr : ktime_get+0x50/0xac [ 2415.082228] sp : ffff80000dfdbb90 [ 2415.085585] x29: ffff80000dfdbb90 x28: 00000000ffffffff x27: ffff00006405e580 [ 2415.092832] x26: ffff00006405e748 x25: 0000000001200000 x24: ffff00006405e180 [ 2415.100076] x23: ffff80000dfdbd68 x22: 0000000000000000 x21: 000002321545f201 [ 2415.107320] x20: 000000000012017e x19: ffff80000ae3b440 x18: ffff000000000000 [ 2415.114564] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000dc [ 2415.121809] x14: 0000000001200011 x13: 0000000060000000 x12: 0000ffffa7b6c1e8 [ 2415.129052] x11: 0000000000000040 x10: ffff80000a96c5c0 x9 : ffff8000080990d4 [ 2415.136295] x8 : 0000000000000000 x7 : 0000000000a9c84a x6 : 4480001ec1769752 [ 2415.143538] x5 : 00ffbffeffffffff x4 : 0000000900000000 x3 : 0000000000000000 [ 2415.150781] x2 : ffff80000a94e000 x1 : ffff8000090336a0 x0 : ffff80000ad102f0 [ 2415.158025] Call trace: [ 2415.160498] 0x620000090336a0 [ 2415.163505] copy_process+0xe34/0x1534
Do you have the disassembly (and source:line infor) around copy_process+0xe34/0x1534? The faulting PC is like a messed up copy of x1 where the upper bits have been corrupted somehow.
Will
On 2022-07-04 12:26, Will Deacon wrote:
On Mon, Jul 04, 2022 at 01:28:30PM +0530, Naresh Kamboju wrote:
While running LTP controllers tests on arm64 Raspberry Pi 4 Model B the following kernel crash noticed.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
metadata: git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git_sha: 88084a3df1672e131ddc1b4e39eeacfd39864acf kernel_version: 5.19.0-rc5 kernel-config: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/config build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/5... artifact-location: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh vmlinux.xz: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/vmlinux.xz System.map: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/System.map toolchain: gcc-11
Steps to reproduce:
./runltp -p -q -f controllers
Test log:
cgroup_fj_stress_blkio_4_4_each 1 TPASS: All done! cgroup_fj_stress_blkio_4_4_each 2 TINFO: Removing all ltp subgroups... cgroup_fj_stress_blkio_2_9_each 1 TINFO: Subsystem blkio is mounted at /sys/fs/cgroup/blkio cgroup_fj_stress_blkio_2_9_each 1 TINFO: Creating subgroups ... [ 2414.973441] Unable to handle kernel paging request at virtual address 00620000090336a0 [ 2414.981581] Mem abort info: [ 2414.984480] ESR = 0x0000000086000004 [ 2414.988323] EC = 0x21: IABT (current EL), IL = 32 bits [ 2414.993765] SET = 0, FnV = 0 [ 2414.996905] EA = 0, S1PTW = 0 [ 2415.000124] FSC = 0x04: level 0 translation fault [ 2415.005118] [00620000090336a0] address between user and kernel address ranges [ 2415.012393] Internal error: Oops: 86000004 [#1] PREEMPT SMP [ 2415.018048] Modules linked in: btrfs blake2b_generic libcrc32c raid6_pq zstd_compress xhci_pci snd_soc_hdmi_codec xhci_pci_renesas raspberrypi_cpufreq hci_uart btqca brcmfmac brcmutil btbcm vc4 bluetooth cfg80211 cec drm_display_helper drm_cma_helper rfkill clk_raspberrypi reset_raspberrypi drm_kms_helper crct10dif_ce raspberrypi_hwmon drm i2c_bcm2835 iproc_rng200 rng_core pwm_bcm2835 bcm2711_thermal pcie_brcmstb fuse [ 2415.055725] CPU: 0 PID: 11626 Comm: cgroup_fj_stres Not taintedlinu#1 [ 2415.062965] Hardware name: Raspberry Pi 4 Model B (DT) [ 2415.068175] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2415.075238] pc : 0x620000090336a0 [ 2415.078600] lr : ktime_get+0x50/0xac [ 2415.082228] sp : ffff80000dfdbb90 [ 2415.085585] x29: ffff80000dfdbb90 x28: 00000000ffffffff x27: ffff00006405e580 [ 2415.092832] x26: ffff00006405e748 x25: 0000000001200000 x24: ffff00006405e180 [ 2415.100076] x23: ffff80000dfdbd68 x22: 0000000000000000 x21: 000002321545f201 [ 2415.107320] x20: 000000000012017e x19: ffff80000ae3b440 x18: ffff000000000000 [ 2415.114564] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000dc [ 2415.121809] x14: 0000000001200011 x13: 0000000060000000 x12: 0000ffffa7b6c1e8 [ 2415.129052] x11: 0000000000000040 x10: ffff80000a96c5c0 x9 : ffff8000080990d4 [ 2415.136295] x8 : 0000000000000000 x7 : 0000000000a9c84a x6 : 4480001ec1769752 [ 2415.143538] x5 : 00ffbffeffffffff x4 : 0000000900000000 x3 : 0000000000000000 [ 2415.150781] x2 : ffff80000a94e000 x1 : ffff8000090336a0 x0 : ffff80000ad102f0 [ 2415.158025] Call trace: [ 2415.160498] 0x620000090336a0 [ 2415.163505] copy_process+0xe34/0x1534
Do you have the disassembly (and source:line infor) around copy_process+0xe34/0x1534? The faulting PC is like a messed up copy of x1 where the upper bits have been corrupted somehow.
Even better, according to the vmlinux that LR value points right after a "blr x1". From the shape of it, looks like it's probably the tk_clock_read() call.
Robin.
On Mon, Jul 04, 2022 at 02:37:52PM +0100, Robin Murphy wrote:
On 2022-07-04 12:26, Will Deacon wrote:
On Mon, Jul 04, 2022 at 01:28:30PM +0530, Naresh Kamboju wrote:
While running LTP controllers tests on arm64 Raspberry Pi 4 Model B the following kernel crash noticed.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
metadata: git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git_sha: 88084a3df1672e131ddc1b4e39eeacfd39864acf kernel_version: 5.19.0-rc5 kernel-config: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/config build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/5... artifact-location: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh vmlinux.xz: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/vmlinux.xz System.map: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/System.map toolchain: gcc-11
Steps to reproduce:
./runltp -p -q -f controllers
Test log:
cgroup_fj_stress_blkio_4_4_each 1 TPASS: All done! cgroup_fj_stress_blkio_4_4_each 2 TINFO: Removing all ltp subgroups... cgroup_fj_stress_blkio_2_9_each 1 TINFO: Subsystem blkio is mounted at /sys/fs/cgroup/blkio cgroup_fj_stress_blkio_2_9_each 1 TINFO: Creating subgroups ... [ 2414.973441] Unable to handle kernel paging request at virtual address 00620000090336a0 [ 2414.981581] Mem abort info: [ 2414.984480] ESR = 0x0000000086000004 [ 2414.988323] EC = 0x21: IABT (current EL), IL = 32 bits [ 2414.993765] SET = 0, FnV = 0 [ 2414.996905] EA = 0, S1PTW = 0 [ 2415.000124] FSC = 0x04: level 0 translation fault [ 2415.005118] [00620000090336a0] address between user and kernel address ranges [ 2415.012393] Internal error: Oops: 86000004 [#1] PREEMPT SMP [ 2415.018048] Modules linked in: btrfs blake2b_generic libcrc32c raid6_pq zstd_compress xhci_pci snd_soc_hdmi_codec xhci_pci_renesas raspberrypi_cpufreq hci_uart btqca brcmfmac brcmutil btbcm vc4 bluetooth cfg80211 cec drm_display_helper drm_cma_helper rfkill clk_raspberrypi reset_raspberrypi drm_kms_helper crct10dif_ce raspberrypi_hwmon drm i2c_bcm2835 iproc_rng200 rng_core pwm_bcm2835 bcm2711_thermal pcie_brcmstb fuse [ 2415.055725] CPU: 0 PID: 11626 Comm: cgroup_fj_stres Not taintedlinu#1 [ 2415.062965] Hardware name: Raspberry Pi 4 Model B (DT) [ 2415.068175] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2415.075238] pc : 0x620000090336a0 [ 2415.078600] lr : ktime_get+0x50/0xac [ 2415.082228] sp : ffff80000dfdbb90 [ 2415.085585] x29: ffff80000dfdbb90 x28: 00000000ffffffff x27: ffff00006405e580 [ 2415.092832] x26: ffff00006405e748 x25: 0000000001200000 x24: ffff00006405e180 [ 2415.100076] x23: ffff80000dfdbd68 x22: 0000000000000000 x21: 000002321545f201 [ 2415.107320] x20: 000000000012017e x19: ffff80000ae3b440 x18: ffff000000000000 [ 2415.114564] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000dc [ 2415.121809] x14: 0000000001200011 x13: 0000000060000000 x12: 0000ffffa7b6c1e8 [ 2415.129052] x11: 0000000000000040 x10: ffff80000a96c5c0 x9 : ffff8000080990d4 [ 2415.136295] x8 : 0000000000000000 x7 : 0000000000a9c84a x6 : 4480001ec1769752 [ 2415.143538] x5 : 00ffbffeffffffff x4 : 0000000900000000 x3 : 0000000000000000 [ 2415.150781] x2 : ffff80000a94e000 x1 : ffff8000090336a0 x0 : ffff80000ad102f0 [ 2415.158025] Call trace: [ 2415.160498] 0x620000090336a0 [ 2415.163505] copy_process+0xe34/0x1534
Do you have the disassembly (and source:line infor) around copy_process+0xe34/0x1534? The faulting PC is like a messed up copy of x1 where the upper bits have been corrupted somehow.
Even better, according to the vmlinux that LR value points right after a "blr x1". From the shape of it, looks like it's probably the tk_clock_read() call.
System.map has:
ffff8000090336a0 t arch_counter_read
so yes, it looks like we want to call that via:
clock->read(clock);
but the indirect branch goes wrong :/
Naresh -- do you see this repeatably and on more than just one board?
Will
On Mon, 4 Jul 2022 at 19:49, Will Deacon will@kernel.org wrote:
On Mon, Jul 04, 2022 at 02:37:52PM +0100, Robin Murphy wrote:
On 2022-07-04 12:26, Will Deacon wrote:
On Mon, Jul 04, 2022 at 01:28:30PM +0530, Naresh Kamboju wrote:
While running LTP controllers tests on arm64 Raspberry Pi 4 Model B the following kernel crash noticed.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
metadata: git_ref: master git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git_sha: 88084a3df1672e131ddc1b4e39eeacfd39864acf kernel_version: 5.19.0-rc5 kernel-config: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/config build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/5... artifact-location: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh vmlinux.xz: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/vmlinux.xz System.map: https://builds.tuxbuild.com/2BSEyt8Sb19HSj6SnBFiMo6kiQh/System.map toolchain: gcc-11
Steps to reproduce:
./runltp -p -q -f controllers
Test log:
cgroup_fj_stress_blkio_4_4_each 1 TPASS: All done! cgroup_fj_stress_blkio_4_4_each 2 TINFO: Removing all ltp subgroups... cgroup_fj_stress_blkio_2_9_each 1 TINFO: Subsystem blkio is mounted at /sys/fs/cgroup/blkio cgroup_fj_stress_blkio_2_9_each 1 TINFO: Creating subgroups ... [ 2414.973441] Unable to handle kernel paging request at virtual address 00620000090336a0 [ 2414.981581] Mem abort info: [ 2414.984480] ESR = 0x0000000086000004 [ 2414.988323] EC = 0x21: IABT (current EL), IL = 32 bits [ 2414.993765] SET = 0, FnV = 0 [ 2414.996905] EA = 0, S1PTW = 0 [ 2415.000124] FSC = 0x04: level 0 translation fault [ 2415.005118] [00620000090336a0] address between user and kernel address ranges [ 2415.012393] Internal error: Oops: 86000004 [#1] PREEMPT SMP [ 2415.018048] Modules linked in: btrfs blake2b_generic libcrc32c raid6_pq zstd_compress xhci_pci snd_soc_hdmi_codec xhci_pci_renesas raspberrypi_cpufreq hci_uart btqca brcmfmac brcmutil btbcm vc4 bluetooth cfg80211 cec drm_display_helper drm_cma_helper rfkill clk_raspberrypi reset_raspberrypi drm_kms_helper crct10dif_ce raspberrypi_hwmon drm i2c_bcm2835 iproc_rng200 rng_core pwm_bcm2835 bcm2711_thermal pcie_brcmstb fuse [ 2415.055725] CPU: 0 PID: 11626 Comm: cgroup_fj_stres Not taintedlinu#1 [ 2415.062965] Hardware name: Raspberry Pi 4 Model B (DT) [ 2415.068175] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 2415.075238] pc : 0x620000090336a0 [ 2415.078600] lr : ktime_get+0x50/0xac [ 2415.082228] sp : ffff80000dfdbb90 [ 2415.085585] x29: ffff80000dfdbb90 x28: 00000000ffffffff x27: ffff00006405e580 [ 2415.092832] x26: ffff00006405e748 x25: 0000000001200000 x24: ffff00006405e180 [ 2415.100076] x23: ffff80000dfdbd68 x22: 0000000000000000 x21: 000002321545f201 [ 2415.107320] x20: 000000000012017e x19: ffff80000ae3b440 x18: ffff000000000000 [ 2415.114564] x17: 0000000000000000 x16: 0000000000000000 x15: 00000000000000dc [ 2415.121809] x14: 0000000001200011 x13: 0000000060000000 x12: 0000ffffa7b6c1e8 [ 2415.129052] x11: 0000000000000040 x10: ffff80000a96c5c0 x9 : ffff8000080990d4 [ 2415.136295] x8 : 0000000000000000 x7 : 0000000000a9c84a x6 : 4480001ec1769752 [ 2415.143538] x5 : 00ffbffeffffffff x4 : 0000000900000000 x3 : 0000000000000000 [ 2415.150781] x2 : ffff80000a94e000 x1 : ffff8000090336a0 x0 : ffff80000ad102f0 [ 2415.158025] Call trace: [ 2415.160498] 0x620000090336a0 [ 2415.163505] copy_process+0xe34/0x1534
Do you have the disassembly (and source:line infor) around copy_process+0xe34/0x1534? The faulting PC is like a messed up copy of x1 where the upper bits have been corrupted somehow.
Even better, according to the vmlinux that LR value points right after a "blr x1". From the shape of it, looks like it's probably the tk_clock_read() call.
System.map has:
ffff8000090336a0 t arch_counter_read
so yes, it looks like we want to call that via:
clock->read(clock);but the indirect branch goes wrong :/
Naresh -- do you see this repeatably and on more than just one board?
I have been trying to reproduce this problem on a pool of Raspberry Pi 4 boards but have not been successful yet.
- Naresh
Will
-
Naresh Kamboju -
Robin Murphy -
Will Deacon