While running LTP tracing on qemu_arm the following kernel crash was noticed on the linux mainline master branch kernel. Please find these easy steps to reproduce the kernel build and test steps step to reproduce: # please install tuxmake # sudo pip3 install -U tuxmake # cd linux # tuxmake --runtime docker --target-arch arm --toolchain gcc-9 --kconfig defconfig --kconfig-add https://builds.tuxbuild.com/1kfUeRj2jJIxnGeUvaqc3X5AffD/config # Boot the qemu_arm # /usr/bin/qemu-system-aarch64 -cpu host,aarch64=off -machine virt-2.10,accel=kvm -nographic -net nic,model=virtio,macaddr=BA:DD:AD:CC:09:07 -net tap -m 2048 -monitor none -kernel /kernel/zImage --append "console=ttyAMA0 root=/dev/vda rw" -hda /rootfs/rpb-console-image-lkft-am57xx-evm-20201022181203-3085.rootfs.ext4 -m 4096 -smp 2 -nographic # run ltp tracing # cd /opt/ltp # ./runltp -f tracing Crash log -------------- ftrace-stress-test 1 TINFO: Start pid15=684 /opt/ltp/testcases/bin/ftrace_stress/ftrace_buffer_size_kb.sh ftrace-stress-test 1 TINFO: Start pid16=690 /opt/ltp/testcases/bin/ftrace_stress/ftrace_tracing_cpumask.sh ftrace-stress-test 1 TINFO: Start pid17=692 /opt/ltp/testcases/bin/ftrace_stress/ftrace_set_ftrace_filter.sh [ 25.092146] 8<--- cut here --- [ 25.093626] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 25.097020] pgd = 4cf4586c [ 25.098184] [00000000] *pgd=fb30f835 [ 25.100095] Internal error: Oops: 17 [#1] SMP ARM [ 25.102080] Modules linked in: crc32_arm_ce sha2_arm_ce sha256_arm sha1_arm_ce sha1_arm aes_arm_ce crypto_simd [ 25.106741] CPU: 1 PID: 659 Comm: sh Not tainted 5.10.0-rc5 #2 [ 25.109355] Hardware name: Generic DT based system [ 25.111768] PC is at __traceiter_kmem_cache_alloc+0x38/0x70 [ 25.114516] LR is at kmem_cache_alloc+0x4ac/0x598 [ 25.116855] pc : [<c04aebd8>] lr : [<c04f44fc>] psr: 60000013 [ 25.120096] sp : c4683e28 ip : c04aebb8 fp : c4683e5c [ 25.122777] r10: c051dbbc r9 : 00001000 r8 : 00000cc0 [ 25.125367] r7 : c21da000 r6 : 00001000 r5 : 00000000 r4 : 00000000 [ 25.128579] r3 : 00001000 r2 : c21da000 r1 : c051dbbc r0 : c1f32e60 [ 25.131988] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 25.135803] Control: 10c5383d Table: 4401406a DAC: 00000051 [ 25.138762] Process sh (pid: 659, stack limit = 0xcb88fdd8) [ 25.141679] Stack: (0xc4683e28 to 0xc4684000) [ 25.144063] 3e20: 00000006 c1d04f08 c20f9480 c20f9480 00000000 c21da000 [ 25.148378] 3e40: 00000cc0 c1d056cc c1f9d20c 00024937 c4683e9c c4683e60 c03131b4 c04aebac [ 25.152710] 3e60: 00001000 00000cc0 c051dbbc c21dc000 00000000 00000000 00000000 00105748 [ 25.157000] 3e80: 00000000 00000000 c1d05890 ffffff9c c4683ecc c4683ea0 c03131b4 c04f405c [ 25.161193] 3ea0: 00000001 00000000 00000000 00000000 00000000 c4683f38 00000000 ffffff9c [ 25.165376] 3ec0: c4683edc c4683ed0 c03131b4 c051db94 c4683f34 c4683ee0 c03131b4 c051dcec [ 25.169368] 3ee0: c03f5374 c4683f90 c0509598 00000002 00020241 c03081b6 00000002 00000300 [ 25.173435] 3f00: 00000001 c1d04f08 00104a68 000001b6 00000000 00020241 00000000 ffffff9c [ 25.177849] 3f20: 00105748 00000142 c4683f94 c4683f38 c03131b4 c0507b48 00020241 00000000 [ 25.181908] 3f40: 000001b6 00000000 00000000 00000000 00020241 00000000 000001b6 00000000 [ 25.185915] 3f60: 00000000 00000000 00104a68 c1d04f08 00104a68 00000000 00000002 00000142 [ 25.190042] 3f80: c0300284 c4682000 c4683fa4 c4683f98 c03131b4 c050947c 00000000 c4683fa8 [ 25.194293] 3fa0: c03131b4 c0509588 00104a68 00000000 ffffff9c 00105748 00020241 000001b6 [ 25.198263] 3fc0: 00104a68 00000000 00000002 00000142 00000003 00105748 b6f522f0 be80bf74 [ 25.202447] 3fe0: 00000064 be80be30 b6ede000 b6e60668 60000010 ffffff9c 00000000 00000000 [ 25.206570] Backtrace: [ 25.207873] [<c04aeba0>] (__traceiter_kmem_cache_alloc) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.212483] r10:00024937 r9:c1f9d20c r8:c1d056cc r7:00000cc0 r6:c21da000 r5:00000000 [ 25.216468] r4:c20f9480 [ 25.217838] [<c04f4050>] (kmem_cache_alloc) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.222105] r10:ffffff9c r9:c1d05890 r8:00000000 r7:00000000 r6:00105748 r5:00000000 [ 25.225926] r4:00000000 [ 25.227298] [<c051db88>] (getname_flags) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.231382] r10:ffffff9c r9:00000000 r8:c4683f38 r7:00000000 r6:00000000 r5:00000000 [ 25.235203] r4:00000000 r3:00000001 [ 25.237027] [<c051dce0>] (getname) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.240709] [<c0507b3c>] (do_sys_openat2) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.244824] r10:00000142 r9:00105748 r8:ffffff9c r7:00000000 r6:00020241 r5:00000000 [ 25.248778] r4:000001b6 [ 25.250190] [<c0509470>] (do_sys_open) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.254172] r9:c4682000 r8:c0300284 r7:00000142 r6:00000002 r5:00000000 r4:00104a68 [ 25.257969] [<c050957c>] (sys_openat) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 25.261786] Code: e590403c e1a07002 e59b8008 e1a06003 (e5945000) [ 25.265178] ---[ end trace ce6fdcdd133daa28 ]--- [ 27.003188] 8<--- cut here --- [ 27.004635] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 27.007952] pgd = 932e7ef5 [ 27.009128] [00000000] *pgd=fb2eb835 [ 27.010918] Internal error: Oops: 17 [#2] SMP ARM [ 27.013298] Modules linked in: crc32_arm_ce sha2_arm_ce sha256_arm sha1_arm_ce sha1_arm aes_arm_ce crypto_simd [ 27.018390] CPU: 0 PID: 720 Comm: sh Tainted: G D 5.10.0-rc5 #2 [ 27.021918] Hardware name: Generic DT based system [ 27.024296] PC is at __traceiter_rcu_dyntick+0x34/0x68 [ 27.026836] LR is at rcu_nmi_enter+0x14c/0x158 [ 27.029062] pc : [<c03c839c>] lr : [<c123a8a8>] psr: 600d0193 [ 27.032178] sp : c4749cb8 ip : c03c8380 fp : c4749ce4 [ 27.034764] r10: 0000006b r9 : c18e0b5c r8 : 0011c3fa [ 27.037369] r7 : 40000000 r6 : 40000002 r5 : ee4d5ec0 r4 : 00000000 [ 27.040596] r3 : 40000002 r2 : 40000000 r1 : c18e0b5c r0 : c1f31d80 [ 27.043812] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none [ 27.047394] Control: 10c5383d Table: 446dc06a DAC: 00000051 [ 27.050239] Process sh (pid: 720, stack limit = 0xab7b3677) [ 27.053024] Stack: (0xc4749cb8 to 0xc474a000) [ 27.055215] 9ca0: c04485a0 c0424b40 [ 27.059197] 9cc0: 00000002 ee4d5ec0 c1d04f58 00000000 0000001f 00000000 c4749d14 c4749ce8 [ 27.063169] 9ce0: c03131b4 c03c8374 0011c3fa c4749cf8 c03134dc 600d0193 c04243cc c4748000 [ 27.067238] 9d00: c1f32460 c04486c8 c4749d24 c4749d18 c123a8c4 c123a768 c4749d3c c4749d28 [ 27.071236] 9d20: c03d5394 c123a8c0 c1cbbc10 c04243cc c4749d64 c4749d40 c03131b4 c03d5378 [ 27.075225] 9d40: ee4cfbc0 c4749d90 49832e2c 00000006 00000000 000d0113 c4749d8c c4749d68 [ 27.079216] 9d60: c04243cc c0443044 c031cf2c c03184a4 49832e2c 00000006 ff87959f c32c3180 [ 27.083208] 9d80: c4749dcc c4749d90 c04486c8 c04242bc c03184a4 00000000 49832e2c 00000006 [ 27.087198] 9da0: 49837274 00000006 00000007 c1d04f08 ff87959f 000ff879 c330d6c0 00000000 [ 27.091201] 9dc0: c4749df4 c4749dd0 c03131c0 c0448638 00000001 00000001 ffffffff 00000000 [ 27.095222] 9de0: ffefe758 effe8104 c4749e14 c4749df8 c03131b4 c031cef8 c4749e44 ff87959f [ 27.099234] 9e00: c03131c0 c4749ec8 c4749e44 c4749e18 c03131b4 c031ddb4 effe8120 effe8104 [ 27.103234] 9e20: 00000001 00000406 00000402 c4749ec8 c32c3180 0000006b c4749ea4 c4749e48 [ 27.107227] 9e40: c03131b4 c04c2734 effe8120 00000062 c2ca9420 00000000 c031f4fc c2ca9424 [ 27.111218] 9e60: 00000062 00220000 c2c73ab0 00000000 00000000 c1d04f08 00000254 00000254 [ 27.115217] 9e80: b6ddf000 0000005c 00000040 c4749fb0 0000006b c4749ec8 c4749f2c c4749ea8 [ 27.119222] 9ea0: c03131b4 c0481970 c4749edc c4749eb8 c04243cc c0443044 c1242404 c04c6218 [ 27.123546] 9ec0: 496c8640 b6ddf000 c330d6c0 00000254 00100cca 0000006b b6dd6000 c46dedb0 [ 27.127869] 9ee0: c46dedb0 00000000 00000000 00000000 ffefe758 eff45470 00000000 c1d04f08 [ 27.131949] 9f00: c4749fb0 c4749fb0 b6ddfd74 80000007 c473a400 c473a444 00000000 00000254 [ 27.135930] 9f20: c4749f74 c4749f30 c03131b4 c04c2b18 10c5383d 10c5387d c4749f5c c4749f48 [ 27.139904] 9f40: c03134dc c04484ac b6ddfd74 00000007 c1d0b9e0 b6ddfd74 c4749fb0 c12422fc [ 27.143826] 9f60: 000c8b64 000f60ac c4749fac c4749f78 c03131b4 c1242308 c1d93f00 c1cb7b08 [ 27.147820] 9f80: 2c818000 00020783 b6ddfd74 b6ddfd74 600d0010 ffffffff 10c5383d 10c5387d [ 27.151819] 9fa0: 00000000 c4749fb0 c03131b4 c0318400 b6eb07dc 00103688 00000000 00000b39 [ 27.155822] 9fc0: 001035c0 000000ff 000f4d5c 000002d0 00000000 000c8b64 000f60ac 00102440 [ 27.159899] 9fe0: 000ef094 beef2628 000683f8 b6ddfd74 600d0010 ffffffff 00000000 00000000 [ 27.163927] Backtrace: [ 27.165235] [<c03c8368>] (__traceiter_rcu_dyntick) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.169524] r9:00000000 r8:0000001f r7:00000000 r6:c1d04f58 r5:ee4d5ec0 r4:00000002 [ 27.173340] [<c123a75c>] (rcu_nmi_enter) from [<c123a8c4>] (rcu_irq_enter+0x10/0x14) [ 27.177170] r8:c04486c8 r7:c1f32460 r6:c4748000 r5:c04243cc r4:600d0193 [ 27.180507] [<c123a8b4>] (rcu_irq_enter) from [<c03d5394>] (rcu_irq_enter_irqson+0x28/0x44) [ 27.184606] [<c03d536c>] (rcu_irq_enter_irqson) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.188847] r5:c04243cc r4:c1cbbc10 [ 27.190673] [<c0443038>] (trace_hardirqs_on) from [<c04243cc>] (profile_graph_return+0x11c/0x1a4) [ 27.195072] r9:000d0113 r8:00000000 r7:00000006 r6:49832e2c r5:c4749d90 r4:ee4cfbc0 [ 27.198881] [<c04242b0>] (profile_graph_return) from [<c04486c8>] (ftrace_return_to_handler+0x9c/0x150) [ 27.203459] r9:c32c3180 r8:ff87959f r7:00000006 r6:49832e2c r5:c03184a4 r4:c031cf2c [ 27.207323] [<c044862c>] (ftrace_return_to_handler) from [<c03131c0>] (return_to_handler+0xc/0x18) [ 27.211740] r7:00000000 r6:c330d6c0 r5:000ff879 r4:ff87959f [ 27.214585] [<c031ceec>] (__sync_icache_dcache) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.218843] r5:effe8104 r4:ffefe758 [ 27.220652] [<c031dda8>] (set_pte_at) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.224463] r4:c4749ec8 [ 27.225781] [<c04c2728>] (alloc_set_pte) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.229713] r10:0000006b r9:c32c3180 r8:c4749ec8 r7:00000402 r6:00000406 r5:00000001 [ 27.233562] r4:effe8104 r3:effe8120 [ 27.235377] [<c0481964>] (filemap_map_pages) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.239487] r10:c4749ec8 r9:0000006b r8:c4749fb0 r7:00000040 r6:0000005c r5:b6ddf000 [ 27.243384] r4:00000254 [ 27.244705] [<c04c2b0c>] (handle_mm_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.248734] r10:00000254 r9:00000000 r8:c473a444 r7:c473a400 r6:80000007 r5:b6ddfd74 [ 27.252596] r4:c4749fb0 [ 27.253940] [<c12422fc>] (do_page_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.257918] r10:000f60ac r9:000c8b64 r8:c12422fc r7:c4749fb0 r6:b6ddfd74 r5:c1d0b9e0 [ 27.261779] r4:00000007 [ 27.263082] [<c03183f4>] (do_PrefetchAbort) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 27.267143] r8:10c5387d r7:10c5383d r6:ffffffff r5:600d0010 r4:b6ddfd74 [ 27.270446] Code: e1a09001 e590415c e1a07002 e1a06003 (e5945000) [ 27.273460] ---[ end trace ce6fdcdd133daa29 ]--- [ 50.299401] rcu: INFO: rcu_sched self-detected stall on CPU [ 50.301847] rcu: 0-....: (2100 ticks this GP) idle=412/1/0x40000002 softirq=8327/8327 fqs=1050 [ 50.305470] (t=2101 jiffies g=2009 q=19405) [ 50.305477] NMI backtrace for cpu 0 [ 50.308732] CPU: 0 PID: 720 Comm: sh Tainted: G D 5.10.0-rc5 #2 [ 50.311706] Hardware name: Generic DT based system [ 50.313709] Backtrace: [ 50.314838] [<c122432c>] (dump_backtrace) from [<c12246ec>] (show_stack+0x20/0x24) [ 50.317983] r7:c1df85ac r6:60000193 r5:00000000 r4:c1df85ac [ 50.320340] [<c12246cc>] (show_stack) from [<c122a034>] (dump_stack+0xe4/0x104) [ 50.323613] [<c1229f50>] (dump_stack) from [<c084bd0c>] (nmi_cpu_backtrace+0xd0/0xfc) [ 50.326920] r10:80000193 r9:c18dfafc r8:c13080c8 r7:00000000 r6:00000000 r5:00000000 [ 50.330156] r4:00000000 r3:c1d04f08 [ 50.331677] [<c084bc3c>] (nmi_cpu_backtrace) from [<c084be2c>] (nmi_trigger_cpumask_backtrace+0xf4/0x13c) [ 50.335648] r5:c1d0597c r4:c0310e24 [ 50.337199] [<c084bd38>] (nmi_trigger_cpumask_backtrace) from [<c03120e8>] (arch_trigger_cpumask_backtrace+0x20/0x24) [ 50.341567] r7:c1d8e680 r6:c1d04f5c r5:c1d05008 r4:00000000 [ 50.343929] [<c03120c8>] (arch_trigger_cpumask_backtrace) from [<c12269fc>] (rcu_dump_cpu_stacks+0x10c/0x144) [ 50.348007] [<c12268f0>] (rcu_dump_cpu_stacks) from [<c03d5cb8>] (rcu_sched_clock_irq+0x7e0/0xa64) [ 50.351676] r10:2c818000 r9:c1d03d00 r8:c1cbdec0 r7:c1f31d80 r6:00000000 r5:ee4d5ec0 [ 50.354905] r4:c1d8e680 [ 50.356002] [<c03d54d8>] (rcu_sched_clock_irq) from [<c03e104c>] (update_process_times+0x70/0x98) [ 50.359635] r10:20000193 r9:c4748000 r8:00000000 r7:c4749948 r6:b3bae668 r5:00000000 [ 50.362859] r4:ffffe000 [ 50.363963] [<c03e0fdc>] (update_process_times) from [<c03f5aec>] (tick_sched_handle+0x64/0x68) [ 50.367533] r5:0000000b r4:ee4cf9a8 [ 50.369049] [<c03f5a88>] (tick_sched_handle) from [<c03f5d80>] (tick_sched_timer+0x5c/0xb8) [ 50.372478] [<c03f5d24>] (tick_sched_timer) from [<c03e1fc8>] (__hrtimer_run_queues+0xf8/0x3c0) [ 50.376058] r7:c03f5d24 r6:ee4cf640 r5:ee4cf9a8 r4:ee4cf680 [ 50.378394] [<c03e1ed0>] (__hrtimer_run_queues) from [<c03e2ef4>] (hrtimer_interrupt+0x130/0x2d4) [ 50.382052] r10:ffffffff r9:ee4cf6c8 r8:ee4cf6f0 r7:ee4cf718 r6:00000003 r5:20000193 [ 50.385345] r4:ee4cf640 [ 50.386429] [<c03e2dc4>] (hrtimer_interrupt) from [<c0fee024>] (arch_timer_handler_virt+0x38/0x40) [ 50.390123] r10:c4749ae8 r9:c4749948 r8:c20c0800 r7:c2004fc0 r6:0000001a r5:c1d059f8 [ 50.393352] r4:c20f6500 [ 50.394436] [<c0fedfec>] (arch_timer_handler_virt) from [<c03c0244>] (handle_percpu_devid_irq+0x9c/0x22c) [ 50.398431] [<c03c01a8>] (handle_percpu_devid_irq) from [<c03b9034>] (generic_handle_irq+0x44/0x54) [ 50.402242] r7:00000000 r6:00000001 r5:00000000 r4:c1cbc244 [ 50.404632] [<c03b8ff0>] (generic_handle_irq) from [<c03b9788>] (__handle_domain_irq+0x6c/0xc0) [ 50.408217] [<c03b971c>] (__handle_domain_irq) from [<c03018ec>] (gic_handle_irq+0xa0/0xc0) [ 50.411653] r9:c4749948 r8:f082000c r7:c1cbc250 r6:f0820000 r5:c1df8e08 r4:c1d059f8 [ 50.414844] [<c030184c>] (gic_handle_irq) from [<c0300b70>] (__irq_svc+0x70/0x98) [ 50.417940] Exception stack(0xc4749948 to 0xc4749990) [ 50.420066] 9940: eff45470 00000002 00000001 00000001 c330d6c0 b6d75000 [ 50.423391] 9960: ffefd5d0 00000000 c4748000 b6d74000 c4749ae8 c47499a4 c47499a8 c4749998 [ 50.426779] 9980: c04c0348 c1241fdc 80000013 ffffffff [ 50.428908] r9:c4748000 r8:c4748000 r7:c474997c r6:ffffffff r5:80000013 r4:c1241fdc [ 50.432134] [<c1241f98>] (_raw_spin_lock) from [<c04c0348>] (unmap_page_range+0x1b8/0x824) [ 50.435530] [<c04c0190>] (unmap_page_range) from [<c04c0a44>] (unmap_single_vma+0x90/0x98) [ 50.438974] r10:c2316540 r9:ffffe000 r8:00000000 r7:c4749ae8 r6:b6e9f000 r5:b6d74000 [ 50.442236] r4:c330d6c0 [ 50.443318] [<c04c09b4>] (unmap_single_vma) from [<c04c0ba4>] (unmap_vmas+0x3c/0x6c) [ 50.446524] r7:00000000 r6:c4749ae8 r5:ffffffff r4:c330d6c0 [ 50.448885] [<c04c0b68>] (unmap_vmas) from [<c04c8880>] (exit_mmap+0xec/0x190) [ 50.451872] r8:00000000 r7:c473a444 r6:c473a400 r5:00000000 r4:c370b660 [ 50.454642] [<c04c8794>] (exit_mmap) from [<c034acb8>] (mmput+0x64/0x128) [ 50.457450] r6:ffffe000 r5:c473a400 r4:c473a400 [ 50.459374] [<c034ac54>] (mmput) from [<c0354f20>] (do_exit+0x368/0xab8) [ 50.462149] r5:c473a400 r4:c2316540 [ 50.463653] [<c0354bb8>] (do_exit) from [<c030e434>] (die+0x380/0x38c) [ 50.466418] r7:c1d0ae6c [ 50.467493] [<c030e0b4>] (die) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.470440] r10:0000006b r9:c4748000 r8:ffffe000 r7:c473a400 r6:00000017 r5:c4749c68 [ 50.473667] r4:00000000 [ 50.474744] [<c03181f8>] (__do_kernel_fault.part.0) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.478431] r7:c473a400 r4:c4749c68 [ 50.479967] [<c12422fc>] (do_page_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.483257] r10:0000006b r9:c4748000 r8:c4749c68 r7:c12422fc r6:00000000 r5:00000017 [ 50.486482] r4:c1d0b7e0 [ 50.487571] [<c0318324>] (do_DataAbort) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.490870] r8:0011c3fa r7:c4749c9c r6:ffffffff r5:600d0193 r4:c03c839c [ 50.493674] [<c03c8368>] (__traceiter_rcu_dyntick) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.497329] r9:00000000 r8:0000001f r7:00000000 r6:c1d04f58 r5:ee4d5ec0 r4:00000002 [ 50.500532] [<c123a75c>] (rcu_nmi_enter) from [<c123a8c4>] (rcu_irq_enter+0x10/0x14) [ 50.503713] r8:c04486c8 r7:c1f32460 r6:c4748000 r5:c04243cc r4:600d0193 [ 50.506501] [<c123a8b4>] (rcu_irq_enter) from [<c03d5394>] (rcu_irq_enter_irqson+0x28/0x44) [ 50.509949] [<c03d536c>] (rcu_irq_enter_irqson) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.513552] r5:c04243cc r4:c1cbbc10 [ 50.515057] [<c0443038>] (trace_hardirqs_on) from [<c04243cc>] (profile_graph_return+0x11c/0x1a4) [ 50.518698] r9:000d0113 r8:00000000 r7:00000006 r6:49832e2c r5:c4749d90 r4:ee4cfbc0 [ 50.521904] [<c04242b0>] (profile_graph_return) from [<c04486c8>] (ftrace_return_to_handler+0x9c/0x150) [ 50.525767] r9:c32c3180 r8:ff87959f r7:00000006 r6:49832e2c r5:c03184a4 r4:c031cf2c [ 50.528953] [<c044862c>] (ftrace_return_to_handler) from [<c03131c0>] (return_to_handler+0xc/0x18) [ 50.532633] r7:00000000 r6:c330d6c0 r5:000ff879 r4:ff87959f [ 50.534969] [<c031ceec>] (__sync_icache_dcache) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.538506] r5:effe8104 r4:ffefe758 [ 50.540008] [<c031dda8>] (set_pte_at) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.543178] r4:c4749ec8 [ 50.544275] [<c04c2728>] (alloc_set_pte) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.547560] r10:0000006b r9:c32c3180 r8:c4749ec8 r7:00000402 r6:00000406 r5:00000001 [ 50.550777] r4:effe8104 r3:effe8120 [ 50.552298] [<c0481964>] (filemap_map_pages) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.555717] r10:c4749ec8 r9:0000006b r8:c4749fb0 r7:00000040 r6:0000005c r5:b6ddf000 [ 50.558956] r4:00000254 [ 50.560065] [<c04c2b0c>] (handle_mm_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.563451] r10:00000254 r9:00000000 r8:c473a444 r7:c473a400 r6:80000007 r5:b6ddfd74 [ 50.566676] r4:c4749fb0 [ 50.567759] [<c12422fc>] (do_page_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.571062] r10:000f60ac r9:000c8b64 r8:c12422fc r7:c4749fb0 r6:b6ddfd74 r5:c1d0b9e0 [ 50.574298] r4:00000007 [ 50.575373] [<c03183f4>] (do_PrefetchAbort) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 50.578764] r8:10c5387d r7:10c5383d r6:ffffffff r5:600d0010 r4:b6ddfd74 [ 56.829452] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 2112 jiffies s: 105 root: 0x1/. [ 56.833647] rcu: blocking rcu_node structures: [ 56.835568] Task dump for CPU 0: [ 56.836953] task:sh state:R running task stack: 0 pid: 720 ppid: 690 flags:0x00000002 [ 56.841166] Backtrace: [ 56.842171] [<c474998c>] (0xc474998c) from [<c47499a8>] (0xc47499a8) [ 56.844650] [<c473a3f4>] (0xc473a3f4) from [<c4749af0>] (0xc4749af0) [ 56.847122] Backtrace aborted due to bad frame pointer <ed5443ef> [ 113.329402] rcu: INFO: rcu_sched self-detected stall on CPU [ 113.332023] rcu: 0-....: (8376 ticks this GP) idle=412/1/0x40000002 softirq=8327/8327 fqs=4170 [ 113.335788] (t=8404 jiffies g=2009 q=76289) [ 113.335795] NMI backtrace for cpu 0 [ 113.339113] CPU: 0 PID: 720 Comm: sh Tainted: G D 5.10.0-rc5 #2 [ 113.342132] Hardware name: Generic DT based system [ 113.344136] Backtrace: [ 113.345257] [<c122432c>] (dump_backtrace) from [<c12246ec>] (show_stack+0x20/0x24) [ 113.348663] r7:c1df85ac r6:60000193 r5:00000000 r4:c1df85ac [ 113.351115] [<c12246cc>] (show_stack) from [<c122a034>] (dump_stack+0xe4/0x104) [ 113.354303] [<c1229f50>] (dump_stack) from [<c084bd0c>] (nmi_cpu_backtrace+0xd0/0xfc) [ 113.357578] r10:80000193 r9:c18dfafc r8:c13080c8 r7:00000000 r6:00000000 r5:00000000 [ 113.360808] r4:00000000 r3:c1d04f08 [ 113.362373] [<c084bc3c>] (nmi_cpu_backtrace) from [<c084be2c>] (nmi_trigger_cpumask_backtrace+0xf4/0x13c) [ 113.366758] r5:c1d0597c r4:c0310e24 [ 113.368346] [<c084bd38>] (nmi_trigger_cpumask_backtrace) from [<c03120e8>] (arch_trigger_cpumask_backtrace+0x20/0x24) [ 113.372954] r7:c1d8e680 r6:c1d04f5c r5:c1d05008 r4:00000000 [ 113.375420] [<c03120c8>] (arch_trigger_cpumask_backtrace) from [<c12269fc>] (rcu_dump_cpu_stacks+0x10c/0x144) [ 113.379611] [<c12268f0>] (rcu_dump_cpu_stacks) from [<c03d5cb8>] (rcu_sched_clock_irq+0x7e0/0xa64) [ 113.383441] r10:2c818000 r9:c1d03d00 r8:c1cbdec0 r7:c1f31d80 r6:00000000 r5:ee4d5ec0 [ 113.386861] r4:c1d8e680 [ 113.387975] [<c03d54d8>] (rcu_sched_clock_irq) from [<c03e104c>] (update_process_times+0x70/0x98) [ 113.391750] r10:20000193 r9:c4748000 r8:00000000 r7:c4749948 r6:609c59e4 r5:00000000 [ 113.395122] r4:ffffe000 [ 113.396234] [<c03e0fdc>] (update_process_times) from [<c03f5aec>] (tick_sched_handle+0x64/0x68) [ 113.399929] r5:0000001a r4:ee4cf9a8 [ 113.401505] [<c03f5a88>] (tick_sched_handle) from [<c03f5d80>] (tick_sched_timer+0x5c/0xb8) [ 113.405106] [<c03f5d24>] (tick_sched_timer) from [<c03e1fc8>] (__hrtimer_run_queues+0xf8/0x3c0) [ 113.408848] r7:c03f5d24 r6:ee4cf640 r5:ee4cf9a8 r4:ee4cf680 [ 113.411369] [<c03e1ed0>] (__hrtimer_run_queues) from [<c03e2ef4>] (hrtimer_interrupt+0x130/0x2d4) [ 113.415431] r10:ffffffff r9:ee4cf6c8 r8:ee4cf6f0 r7:ee4cf718 r6:00000003 r5:20000193 [ 113.418910] r4:ee4cf640 [ 113.420136] [<c03e2dc4>] (hrtimer_interrupt) from [<c0fee024>] (arch_timer_handler_virt+0x38/0x40) [ 113.424271] r10:c4749ae8 r9:c4749948 r8:c20c0800 r7:c2004fc0 r6:0000001a r5:c1d059f8 [ 113.427549] r4:c20f6500 [ 113.428622] [<c0fedfec>] (arch_timer_handler_virt) from [<c03c0244>] (handle_percpu_devid_irq+0x9c/0x22c) [ 113.432921] [<c03c01a8>] (handle_percpu_devid_irq) from [<c03b9034>] (generic_handle_irq+0x44/0x54) [ 113.436681] r7:00000000 r6:00000001 r5:00000000 r4:c1cbc244 [ 113.439058] [<c03b8ff0>] (generic_handle_irq) from [<c03b9788>] (__handle_domain_irq+0x6c/0xc0) [ 113.442618] [<c03b971c>] (__handle_domain_irq) from [<c03018ec>] (gic_handle_irq+0xa0/0xc0) [ 113.446381] r9:c4749948 r8:f082000c r7:c1cbc250 r6:f0820000 r5:c1df8e08 r4:c1d059f8 [ 113.449733] [<c030184c>] (gic_handle_irq) from [<c0300b70>] (__irq_svc+0x70/0x98) [ 113.452928] Exception stack(0xc4749948 to 0xc4749990) [ 113.469892] 9940: eff45470 00000002 00000001 00000001 c330d6c0 b6d75000 [ 113.512042] 9960: ffefd5d0 00000000 c4748000 b6d74000 c4749ae8 c47499a4 c47499a8 c4749998 [ 113.515704] 9980: c04c0348 c1241fd8 80000013 ffffffff [ 113.517991] r9:c4748000 r8:c4748000 r7:c474997c r6:ffffffff r5:80000013 r4:c1241fd8 [ 113.521186] [<c1241f98>] (_raw_spin_lock) from [<c04c0348>] (unmap_page_range+0x1b8/0x824) [ 113.524653] [<c04c0190>] (unmap_page_range) from [<c04c0a44>] (unmap_single_vma+0x90/0x98) [ 113.528076] r10:c2316540 r9:ffffe000 r8:00000000 r7:c4749ae8 r6:b6e9f000 r5:b6d74000 [ 113.531326] r4:c330d6c0 [ 113.532397] [<c04c09b4>] (unmap_single_vma) from [<c04c0ba4>] (unmap_vmas+0x3c/0x6c) [ 113.535570] r7:00000000 r6:c4749ae8 r5:ffffffff r4:c330d6c0 [ 113.537922] [<c04c0b68>] (unmap_vmas) from [<c04c8880>] (exit_mmap+0xec/0x190) [ 113.540919] r8:00000000 r7:c473a444 r6:c473a400 r5:00000000 r4:c370b660 [ 113.543707] [<c04c8794>] (exit_mmap) from [<c034acb8>] (mmput+0x64/0x128) [ 113.546527] r6:ffffe000 r5:c473a400 r4:c473a400 [ 113.548435] [<c034ac54>] (mmput) from [<c0354f20>] (do_exit+0x368/0xab8) [ 113.551203] r5:c473a400 r4:c2316540 [ 113.552697] [<c0354bb8>] (do_exit) from [<c030e434>] (die+0x380/0x38c) [ 113.555389] r7:c1d0ae6c [ 113.556457] [<c030e0b4>] (die) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.559406] r10:0000006b r9:c4748000 r8:ffffe000 r7:c473a400 r6:00000017 r5:c4749c68 [ 113.562632] r4:00000000 [ 113.563711] [<c03181f8>] (__do_kernel_fault.part.0) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.567363] r7:c473a400 r4:c4749c68 [ 113.568829] [<c12422fc>] (do_page_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.572157] r10:0000006b r9:c4748000 r8:c4749c68 r7:c12422fc r6:00000000 r5:00000017 [ 113.575465] r4:c1d0b7e0 [ 113.576551] [<c0318324>] (do_DataAbort) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.579788] r8:0011c3fa r7:c4749c9c r6:ffffffff r5:600d0193 r4:c03c839c [ 113.582553] [<c03c8368>] (__traceiter_rcu_dyntick) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.586196] r9:00000000 r8:0000001f r7:00000000 r6:c1d04f58 r5:ee4d5ec0 r4:00000002 [ 113.642656] [<c123a75c>] (rcu_nmi_enter) from [<c123a8c4>] (rcu_irq_enter+0x10/0x14) [ 113.645985] r8:c04486c8 r7:c1f32460 r6:c4748000 r5:c04243cc r4:600d0193 [ 113.648793] [<c123a8b4>] (rcu_irq_enter) from [<c03d5394>] (rcu_irq_enter_irqson+0x28/0x44) [ 113.652321] [<c03d536c>] (rcu_irq_enter_irqson) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.655956] r5:c04243cc r4:c1cbbc10 [ 113.657459] [<c0443038>] (trace_hardirqs_on) from [<c04243cc>] (profile_graph_return+0x11c/0x1a4) [ 113.661051] r9:000d0113 r8:00000000 r7:00000006 r6:49832e2c r5:c4749d90 r4:ee4cfbc0 [ 113.664255] [<c04242b0>] (profile_graph_return) from [<c04486c8>] (ftrace_return_to_handler+0x9c/0x150) [ 113.668060] r9:c32c3180 r8:ff87959f r7:00000006 r6:49832e2c r5:c03184a4 r4:c031cf2c [ 113.671233] [<c044862c>] (ftrace_return_to_handler) from [<c03131c0>] (return_to_handler+0xc/0x18) [ 113.674871] r7:00000000 r6:c330d6c0 r5:000ff879 r4:ff87959f [ 113.677225] [<c031ceec>] (__sync_icache_dcache) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.680721] r5:effe8104 r4:ffefe758 [ 113.682213] [<c031dda8>] (set_pte_at) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.685492] r4:c4749ec8 [ 113.686597] [<c04c2728>] (alloc_set_pte) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.689965] r10:0000006b r9:c32c3180 r8:c4749ec8 r7:00000402 r6:00000406 r5:00000001 [ 113.693281] r4:effe8104 r3:effe8120 [ 113.694820] [<c0481964>] (filemap_map_pages) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.698536] r10:c4749ec8 r9:0000006b r8:c4749fb0 r7:00000040 r6:0000005c r5:b6ddf000 [ 113.701827] r4:00000254 [ 113.702931] [<c04c2b0c>] (handle_mm_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.706352] r10:00000254 r9:00000000 r8:c473a444 r7:c473a400 r6:80000007 r5:b6ddfd74 [ 113.721917] r4:c4749fb0 [ 113.751301] [<c12422fc>] (do_page_fault) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.767276] r10:000f60ac r9:000c8b64 r8:c12422fc r7:c4749fb0 r6:b6ddfd74 r5:c1d0b9e0 [ 113.770706] r4:00000007 [ 113.771784] [<c03183f4>] (do_PrefetchAbort) from [<c03131b4>] (return_to_handler+0x0/0x18) [ 113.775293] r8:10c5387d r7:10c5383d r6:ffffffff r5:600d0010 r4:b6ddfd74 /opt/ltp/testcases/bin/ftrace_lib.sh: line 176: 659 Segmentation fault sh ftrace_${target}.sh ftrace-stress-test 1 TINFO: killing 658 <> [ 965.948651] Out of memory and no killable processes... [ 965.950965] Kernel panic - not syncing: System is deadlocked on memory Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> metadata: git branch: master git repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline git commit: 418baf2c28f3473039f2f7377760bd8f6897ae18 git describe: v5.10-rc5 make_kernelversion: 5.10.0-rc5 kernel-config: https://builds.tuxbuild.com/1kfUeRj2jJIxnGeUvaqc3X5AffD/config full test log link, https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v5.10-rc5/testrun/3476119/suite/linux-log-parser/test/check-kernel-oops-1967813/log -- Linaro LKFT https://lkft.linaro.org
