Re: [Kernel-packages] [Bug 1822871] Re: enabling ftrace on Hi1620 CS causes an Oops
On Wed, Apr 10, 2019 at 11:01 AM Ard Biesheuvel wrote: > > On Tue, 9 Apr 2019 at 16:30, dann frazier wrote: > > > > Yeah, no crash anymore - thanks Ard! > > > > ubuntu@d06-4:~$ echo function | sudo tee > > /sys/kernel/debug/tracing/current_tracer > > function > > [ 72.778123] ftrace: far branches to multiple entry points unsupported > > inside a single module > > > > ^ I assume this is expected > > > > Uhm, not really. :( > You don't have any out of tree live patching code in your kernel, right? I see the same behavior w/ just-this-patch on top of upstream: [ 431.876690] ftrace: far branches to multiple entry points unsupported inside a single module [ 431.885157] WARNING: CPU: 21 PID: 3388 at kernel/trace/ftrace.c:2008 ftrace_bug+0xb0/0x2b0 [ 431.885158] Modules linked in: nls_iso8859_1 ipmi_ssif joydev input_leds hns_roce_hw_v2 hns_roce ipmi_si ib_uverbs tpm_tis_spi ipmi_devintf ipmi_msghandler spi_dw_mmio spi_dw cppc_cpufreq sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 ses enclosure btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c raid1 raid0 multipath linear marvell aes_ce_blk aes_ce_cipher hid_generic hibmc_drm crct10dif_ce ttm ghash_ce drm_kms_helper sha2_ce syscopyarea sha256_arm64 sysfillrect sha1_ce hisi_sas_v3_hw sysimgblt ixgbe usbhid hns3 fb_sys_fops hisi_sas_main igb drm hclge libsas i2c_algo_bit hid xfrm_algo ahci mdio hnae3 scsi_transport_sas libahci hinic gpio_dwapb aes_neon_bs aes_neon_blk crypto_simd cryptd aes_arm64 [ 431.885213] CPU: 21 PID: 3388 Comm: tee Not tainted 5.1.0-rc4+ #79 [ 431.885215] Hardware name: Huawei TaiShan 2280 V2/BC82AMDA, BIOS TA BIOS 2280-A CS V2.17.01 03/30/2019 [ 431.885217] pstate: 6049 (nZCv daif +PAN -UAO) [ 431.885219] pc : ftrace_bug+0xb0/0x2b0 [ 431.885221] lr : ftrace_replace_code+0xa8/0xc0 [ 431.885222] sp : 20d6bb20 [ 431.885223] x29: 20d6bb20 x28: 97b7828e1d80 [ 431.885225] x27: x26: [ 431.885227] x25: e3d7c228 x24: 20d6bd13 [ 431.885229] x23: 0002 x22: 0001 [ 431.885231] x21: 3ed411993928 x20: 97b7c5810010 [ 431.885232] x19: 97b7c5810010 x18: [ 431.885234] x17: x16: 3ed4ff397168 [ 431.885236] x15: 3ed50005c708 x14: 7320612065646973 [ 431.885237] x13: 6e6920646574726f x12: 707075736e752073 [ 431.885239] x11: 746e696f70207972 x10: 746e6520656c7069 [ 431.885241] x9 : 3ed50005d168 x8 : 3ed4ff141588 [ 431.885243] x7 : 0945 x6 : 3ed500095308 [ 431.885244] x5 : 97b7cfaef150 x4 : 3ed4feba7480 [ 431.885246] x3 : x2 : 12122b60e4976500 [ 431.885248] x1 : 97b7c5810010 x0 : ffea [ 431.885250] Call trace: [ 431.885252] ftrace_bug+0xb0/0x2b0 [ 431.885254] ftrace_replace_code+0xa8/0xc0 [ 431.885256] ftrace_modify_all_code+0xc8/0x160 [ 431.885262] arch_ftrace_update_code+0x10/0x18 [ 431.885264] ftrace_run_update_code+0x20/0x70 [ 431.885266] ftrace_startup_enable+0x4c/0x58 [ 431.885268] ftrace_startup+0xa4/0x140 [ 431.885270] register_ftrace_function+0x64/0x80 [ 431.885272] function_trace_init+0x50/0x98 [ 431.885275] tracing_set_tracer+0x124/0x200 [ 431.885277] tracing_set_trace_write+0x10c/0x168 [ 431.885280] __vfs_write+0x48/0x80 [ 431.885281] vfs_write+0xac/0x1b8 [ 431.885283] ksys_write+0x74/0xf0 [ 431.885284] __arm64_sys_write+0x24/0x30 [ 431.885286] el0_svc_common+0x74/0x118 [ 431.885288] el0_svc_handler+0x38/0x78 [ 431.885290] el0_svc+0x8/0xc [ 431.885292] ---[ end trace d418734dc3074a2a ]--- [ 431.885294] ftrace failed to modify [ 431.885297] [] aes_decrypt+0x20/0x50 [aes_arm64] [ 431.885298] actual: 1f:20:03:d5 [ 431.885302] Setting ftrace call site to call ftrace function [ 431.885303] ftrace record flags: 8001 [ 431.885304] (1) expected tramp: 3ed4fea40c24 ** Attachment added: ".config" https://bugs.launchpad.net/bugs/1822871/+attachment/5254769/+files/.config -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1822871 Title: enabling ftrace on Hi1620 CS causes an Oops Status in linux package in Ubuntu: Confirmed Bug description: [Impact] Attempting to enable the function tracer causes an Oops. This impacts the current disco kernel, as well as latest upstream (@5e7a8ca319268a70a6c7c3c1fde5bea38e1e5539). This is 100% reproducible on D06 CS systems, but not reproducible on D06 ES systems (the previous silicon rev). [Test Case] $ echo function | sudo tee /sys/kernel/debug/tracing/current_tracer [ 3125.651453] kernel BUG at arch/arm64/kernel/insn.c:1325! [ 3125.656766] Internal error: Oops - BUG: 0 [#1] SMP [ 3125.661551] Modules linked in:
Re: [Kernel-packages] [Bug 1822871] Re: enabling ftrace on Hi1620 CS causes an Oops
On Tue, 9 Apr 2019 at 16:30, dann frazier wrote: > > Yeah, no crash anymore - thanks Ard! > > ubuntu@d06-4:~$ echo function | sudo tee > /sys/kernel/debug/tracing/current_tracer > function > [ 72.778123] ftrace: far branches to multiple entry points unsupported > inside a single module > > ^ I assume this is expected > Uhm, not really. You don't have any out of tree live patching code in your kernel, right? > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1822871 > > Title: > enabling ftrace on Hi1620 CS causes an Oops > > Status in linux package in Ubuntu: > Confirmed > > Bug description: > [Impact] > Attempting to enable the function tracer causes an Oops. This impacts the > current disco kernel, as well as latest upstream > (@5e7a8ca319268a70a6c7c3c1fde5bea38e1e5539). > > This is 100% reproducible on D06 CS systems, but not reproducible on > D06 ES systems (the previous silicon rev). > > [Test Case] > $ echo function | sudo tee /sys/kernel/debug/tracing/current_tracer > > [ 3125.651453] kernel BUG at arch/arm64/kernel/insn.c:1325! > [ 3125.656766] Internal error: Oops - BUG: 0 [#1] SMP > [ 3125.661551] Modules linked in: nls_iso8859_1 ipmi_ssif joydev input_leds > tpm_tis_spi hns_roce_hw_v2 hns_roce ib_uverbs spi_dw_mmio ipmi_si spi_dw > ipmi_devintf ipmi_msghandler cppc_cpufreq sch_fq_codel ib_iser rdma_cm iw_cm > ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables > x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov > async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c > raid1 raid0 multipath linear ses enclosure marvell aes_ce_blk aes_ce_cipher > hibmc_drm hid_generic ttm crct10dif_ce drm_kms_helper ghash_ce sha2_ce > syscopyarea sha256_arm64 sysfillrect ixgbe igb sha1_ce hns3 sysimgblt usbhid > fb_sys_fops hisi_sas_v3_hw hclge i2c_algo_bit xfrm_algo hisi_sas_main mdio > hid drm hnae3 libsas ahci scsi_transport_sas hinic gpio_dwapb aes_neon_bs > aes_neon_blk crypto_simd cryptd aes_arm64 > [ 3125.736544] CPU: 124 PID: 3306 Comm: tee Not tainted 5.0.0-rc4+ #12 > [ 3125.742802] Hardware name: Huawei TaiShan 2280 V2/BC82AMDA, BIOS TA BIOS > 2280-A CS V2.16.01 03/16/2019 > [ 3125.752099] pstate: 0049 (nzcv daif +PAN -UAO) > [ 3125.756893] pc : aarch64_insn_adrp_get_offset+0x34/0x38 > [ 3125.762111] lr : plt_entries_equal.part.3+0x40/0x80 > [ 3125.766979] sp : 2837b9f0 > [ 3125.770286] x29: 2837b9f0 x28: bef4fd20d880 > [ 3125.775591] x27: x26: > [ 3125.780896] x25: dea2a7e8 x24: 3dceb8413000 > [ 3125.786200] x23: 0002 x22: 3dce9d2289a4 > [ 3125.791504] x21: 2837ba8c x20: 2837b000 > [ 3125.796808] x19: 3dce9d228000 x18: > [ 3125.802112] x17: x16: 3dceb7742780 > [ 3125.807416] x15: 3dceb7ce7c38 x14: 0001 > [ 3125.812720] x13: bef50bb9e188 x12: > [ 3125.818023] x11: 7efba3e79608 x10: 0a70 > [ 3125.823327] x9 : 3dceb6deeacc x8 : > [ 3125.828631] x7 : 0005 x6 : 3dceb8413f10 > [ 3125.833935] x5 : 002b3000 x4 : 3dceb6f4f4b8 > [ 3125.839239] x3 : x2 : 9000 > [ 3125.844543] x1 : x0 : > [ 3125.849850] Process tee (pid: 3306, stack limit = 0x262bb476) > [ 3125.856281] Call trace: > [ 3125.858723] aarch64_insn_adrp_get_offset+0x34/0x38 > [ 3125.863593] plt_entries_equal.part.3+0x40/0x80 > [ 3125.868115] plt_entries_equal+0x5c/0x70 > [ 3125.872031] ftrace_make_call+0xf0/0x150 > [ 3125.875950] __ftrace_replace_code+0xe8/0xf8 > [ 3125.880212] ftrace_replace_code+0x64/0xc0 > [ 3125.884301] ftrace_modify_all_code+0xb0/0x148 > [ 3125.888738] arch_ftrace_update_code+0x10/0x18 > [ 3125.893174] ftrace_run_update_code+0x20/0x70 > [ 3125.897524] ftrace_startup_enable+0x4c/0x58 > [ 3125.901788] ftrace_startup+0xa4/0x140 > [ 3125.905531] register_ftrace_function+0x64/0x80 > [ 3125.910059] function_trace_init+0x50/0x98 > [ 3125.914149] tracing_set_tracer+0xf4/0x1c0 > [ 3125.918238] tracing_set_trace_write+0x10c/0x168 > [ 3125.922852] __vfs_write+0x60/0x1a8 > [ 3125.926333] vfs_write+0xac/0x1b8 > [ 3125.929641] ksys_write+0x6c/0xd8 > [ 3125.932949] __arm64_sys_write+0x24/0x30 > [ 3125.936866] el0_svc_common+0x78/0x120 > [ 3125.940608] el0_svc_handler+0x38/0x78 > [ 3125.944349] el0_svc+0x8/0xc > [ 3125.947224] Code: 97fffb33 53144c00 a8c17bfd d65f03c0 (d421) > [ 3125.953312] ---[ end trace 0872d3e5933385e2 ]--- > > [Fix] > TBD > > [Regression Risk] > TBD > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1822871/+subscriptions -- You received this bug notification because you are a
