Hello, I'm trying to make EIP97 work on Mediatek mtk7623n (Banana PI R2). The kernel version is 4.14.145. My tests uses af_alg in libaio mode, and encrypts the data. For smaller blocks it works just fine, but if I increase the size I'm getting the kernel error (it fails on 8k block and larger, 4k works fine): [ 38.978165] ------------[ cut here ]------------ [ 38.982765] WARNING: CPU: 2 PID: 0 at lib/percpu-refcount.c:155 percpu_ref_switch_to_atomic_rcu+0xc8/0x19c [ 38.992361] percpu ref (free_ioctx_reqs) <= 0 (0) after switching to atomic [ 38.992365] Modules linked in: pppoe ppp_async pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_FLOWOFFLOAD slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat cryptodev ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables tun algif_skcipher algif_hash af_alg ghash_generic gf128mul gcm authenc leds_gpio gpio_button_hotplug tpm_tis [ 39.069577] tpm_tis_core tpm [ 39.072534] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.14.131 #0 [ 39.078573] Hardware name: Mediatek Cortex-A7 (Device Tree) [ 39.084112] [<c010e99c>] (unwind_backtrace) from [<c010aa78>] (show_stack+0x10/0x14) [ 39.091797] [<c010aa78>] (show_stack) from [<c053649c>] (dump_stack+0x78/0x8c) [ 39.098964] [<c053649c>] (dump_stack) from [<c0116f00>] (__warn+0xe4/0x100) [ 39.105871] [<c0116f00>] (__warn) from [<c0116f54>] (warn_slowpath_fmt+0x38/0x48) [ 39.113293] [<c0116f54>] (warn_slowpath_fmt) from [<c02d7740>] (percpu_ref_switch_to_atomic_rcu+0xc8/0x19c) [ 39.122959] [<c02d7740>] (percpu_ref_switch_to_atomic_rcu) from [<c0163624>] (rcu_process_callbacks+0x308/0x48c) [ 39.133053] [<c0163624>] (rcu_process_callbacks) from [<c010155c>] (__do_softirq+0xe4/0x250) [ 39.141423] [<c010155c>] (__do_softirq) from [<c011ba90>] (irq_exit+0xac/0xf4) [ 39.148588] [<c011ba90>] (irq_exit) from [<c01558f0>] (__handle_domain_irq+0xbc/0xe4) [ 39.156355] [<c01558f0>] (__handle_domain_irq) from [<c0101440>] (gic_handle_irq+0x5c/0x90) [ 39.164638] [<c0101440>] (gic_handle_irq) from [<c010b64c>] (__irq_svc+0x6c/0xa8) [ 39.172056] Exception stack(0xef073f88 to 0xef073fd0) [ 39.177065] 3f80: 00000002 c06bfd0c 2d9ef000 c0113be0 ffffe000 c1e03c74 [ 39.185175] 3fa0: c1e03c28 c1e2ac90 8000406a 410fc073 00000000 00000000 00000e24 ef073fd8 [ 39.193283] 3fc0: c01081a8 c01081ac 60000013 ffffffff [ 39.198294] [<c010b64c>] (__irq_svc) from [<c01081ac>] (arch_cpu_idle+0x34/0x38) [ 39.205631] [<c01081ac>] (arch_cpu_idle) from [<c014ac98>] (do_idle+0xa8/0x11c) [ 39.212881] [<c014ac98>] (do_idle) from [<c014af90>] (cpu_startup_entry+0x18/0x1c) [ 39.220389] [<c014af90>] (cpu_startup_entry) from [<8010176c>] (0x8010176c) [ 39.227307] ---[ end trace 9954b743e1ffbf50 ]--- [ 53.380247] Unable to handle kernel NULL pointer dereference at virtual address 00000009 [ 53.388298] pgd = c143c000 [ 53.390978] [00000009] *pgd=81b20835, *pte=00000000, *ppte=00000000 [ 53.397199] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 53.402549] Modules linked in: pppoe ppp_async pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_FLOWOFFLOAD slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat cryptodev ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables tun algif_skcipher algif_hash af_alg ghash_generic gf128mul gcm authenc leds_gpio gpio_button_hotplug tpm_tis [ 53.472823] tpm_tis_core tpm [ 53.475768] CPU: 2 PID: 1127 Comm: sh Tainted: G W 4.14.131 #0 [ 53.482668] Hardware name: Mediatek Cortex-A7 (Device Tree) [ 53.488190] task: c191b480 task.stack: c1ad0000 [ 53.492685] PC is at kmem_cache_alloc+0x118/0x154 [ 53.497345] LR is at 0x2016 [ 53.500110] pc : [<c01ddacc>] lr : [<00002016>] psr: 20000013 [ 53.506321] sp : c1ad1ea0 ip : 2d9ef000 fp : 00000000 [ 53.511499] r10: 00000000 r9 : 0000201a r8 : c193fb00 [ 53.516676] r7 : ffffe000 r6 : c0134538 r5 : 014000c0 r4 : ef001d80 [ 53.523146] r3 : 00000000 r2 : ef7d0504 r1 : a0000013 r0 : 00000009 [ 53.529618] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 53.536692] Control: 10c5387d Table: 8143c06a DAC: 00000051 [ 53.542387] Process sh (pid: 1127, stack limit = 0xc1ad0218) [ 53.547996] Stack: (0xc1ad1ea0 to 0xc1ad2000) [ 53.552317] 1ea0: 00000011 c191b480 c1e2ad90 00000000 00000000 c191b480 00000000 c0134538 [ 53.560427] 1ec0: 00000011 c1bdf380 c1e2ad90 c0134a3c c1bdf380 00000011 c1e2ad90 c0114e38 [ 53.568537] 1ee0: c193fb00 c1e0e718 c06041bc 00000000 00000000 ffffe000 c1ad1f38 c01e5a7c [ 53.576648] 1f00: 00000020 c054efb8 eef95d90 00000001 c1ad1f40 00000001 c06041bc c01e5b68 [ 53.584758] 1f20: eef95d90 c1b930c0 c1900140 c1900100 00000005 00000011 00000000 00000002 [ 53.592868] 1f40: 00000000 00000000 c1ad0000 00000002 00000000 c01161c8 00000000 00000000 [ 53.600979] 1f60: ffffffff b6f1eacc 00000051 bed0da10 00000008 00000000 0154be60 bed0da10 [ 53.609089] 1f80: 00000002 00000002 c01079e4 c1ad0000 00000002 c01164e8 00000000 00000000 [ 53.617199] 1fa0: c01079e4 c01077e0 0154be60 bed0da10 00000000 b6f1eacc bed0da10 00000008 [ 53.625309] 1fc0: 0154be60 bed0da10 00000002 00000002 00080844 00000001 00000000 00000000 [ 53.633419] 1fe0: 0007fc64 bed0da10 b6efab90 b6efab94 60000010 00000000 00000000 00000000 [ 53.641541] [<c01ddacc>] (kmem_cache_alloc) from [<c0134538>] (prepare_creds+0x2c/0x88) [ 53.649482] [<c0134538>] (prepare_creds) from [<c0134a3c>] (copy_creds+0x80/0x11c) [ 53.656993] [<c0134a3c>] (copy_creds) from [<c0114e38>] (copy_process.part.3+0x260/0x1494) [ 53.665191] [<c0114e38>] (copy_process.part.3) from [<c01161c8>] (_do_fork+0xbc/0x364) [ 53.673043] [<c01161c8>] (_do_fork) from [<c01164e8>] (sys_fork+0x24/0x2c) [ 53.679864] [<c01164e8>] (sys_fork) from [<c01077e0>] (ret_fast_syscall+0x0/0x54) [ 53.687285] Code: ea00000d e121f001 eaffffc4 e5943014 (e7903003) [ 53.693387] ---[ end trace 9954b743e1ffbf51 ]--- [ 53.697967] Kernel panic - not syncing: Fatal exception [ 53.703152] CPU1: stopping [ 53.705836] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D W 4.14.131 #0 [ 53.713081] Hardware name: Mediatek Cortex-A7 (Device Tree) [ 53.718616] [<c010e99c>] (unwind_backtrace) from [<c010aa78>] (show_stack+0x10/0x14) [ 53.726301] [<c010aa78>] (show_stack) from [<c053649c>] (dump_stack+0x78/0x8c) [ 53.733466] [<c053649c>] (dump_stack) from [<c010d998>] (handle_IPI+0xf4/0x1ac) [ 53.740715] [<c010d998>] (handle_IPI) from [<c0101470>] (gic_handle_irq+0x8c/0x90) [ 53.748222] [<c0101470>] (gic_handle_irq) from [<c010b64c>] (__irq_svc+0x6c/0xa8) [ 53.755639] Exception stack(0xef071f88 to 0xef071fd0) [ 53.760648] 1f80: 00000001 c06bfd0c 2d9e0000 c0113be0 ffffe000 c1e03c74 [ 53.768758] 1fa0: c1e03c28 c1e2ac90 8000406a 410fc073 00000000 00000000 00001142 ef071fd8 [ 53.776866] 1fc0: c01081a8 c01081ac 60000013 ffffffff [ 53.781875] [<c010b64c>] (__irq_svc) from [<c01081ac>] (arch_cpu_idle+0x34/0x38) [ 53.789214] [<c01081ac>] (arch_cpu_idle) from [<c014ac98>] (do_idle+0xa8/0x11c) [ 53.796464] [<c014ac98>] (do_idle) from [<c014af90>] (cpu_startup_entry+0x18/0x1c) [ 53.803971] [<c014af90>] (cpu_startup_entry) from [<8010176c>] (0x8010176c) [ 53.810873] CPU0: stopping [ 53.813556] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D W 4.14.131 #0 [ 53.820801] Hardware name: Mediatek Cortex-A7 (Device Tree) [ 53.826330] [<c010e99c>] (unwind_backtrace) from [<c010aa78>] (show_stack+0x10/0x14) [ 53.834012] [<c010aa78>] (show_stack) from [<c053649c>] (dump_stack+0x78/0x8c) [ 53.841175] [<c053649c>] (dump_stack) from [<c010d998>] (handle_IPI+0xf4/0x1ac) [ 53.848424] [<c010d998>] (handle_IPI) from [<c0101470>] (gic_handle_irq+0x8c/0x90) [ 53.855930] [<c0101470>] (gic_handle_irq) from [<c010b64c>] (__irq_svc+0x6c/0xa8) [ 53.863348] Exception stack(0xc1e01f48 to 0xc1e01f90) [ 53.868356] 1f40: 00000000 c06bfd0c 2d9d1000 c0113be0 ffffe000 c1e03c74 [ 53.876466] 1f60: c1e03c28 c1e03c00 c1e2a9c0 00000001 efffce00 c0823a28 00001182 c1e01f98 [ 53.884574] 1f80: c01081a8 c01081ac 60000013 ffffffff [ 53.889584] [<c010b64c>] (__irq_svc) from [<c01081ac>] (arch_cpu_idle+0x34/0x38) [ 53.896919] [<c01081ac>] (arch_cpu_idle) from [<c014ac98>] (do_idle+0xa8/0x11c) [ 53.904168] [<c014ac98>] (do_idle) from [<c014af90>] (cpu_startup_entry+0x18/0x1c) [ 53.911677] [<c014af90>] (cpu_startup_entry) from [<c0800c88>] (start_kernel+0x3c0/0x3cc) [ 53.919785] CPU3: stopping [ 53.922469] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D W 4.14.131 #0 [ 53.929714] Hardware name: Mediatek Cortex-A7 (Device Tree) [ 53.935242] [<c010e99c>] (unwind_backtrace) from [<c010aa78>] (show_stack+0x10/0x14) [ 53.942923] [<c010aa78>] (show_stack) from [<c053649c>] (dump_stack+0x78/0x8c) [ 53.950087] [<c053649c>] (dump_stack) from [<c010d998>] (handle_IPI+0xf4/0x1ac) [ 53.957336] [<c010d998>] (handle_IPI) from [<c0101470>] (gic_handle_irq+0x8c/0x90) [ 53.964843] [<c0101470>] (gic_handle_irq) from [<c010b64c>] (__irq_svc+0x6c/0xa8) [ 53.972261] Exception stack(0xef075f88 to 0xef075fd0) [ 53.977269] 5f80: 00000003 c06bfd0c 2d9fe000 c0113be0 ffffe000 c1e03c74 [ 53.985379] 5fa0: c1e03c28 c1e2ac90 8000406a 410fc073 00000000 00000000 00000003 ef075fd8 [ 53.993488] 5fc0: c01081a8 c01081ac 60000013 ffffffff [ 53.998497] [<c010b64c>] (__irq_svc) from [<c01081ac>] (arch_cpu_idle+0x34/0x38) [ 54.005833] [<c01081ac>] (arch_cpu_idle) from [<c014ac98>] (do_idle+0xa8/0x11c) [ 54.013082] [<c014ac98>] (do_idle) from [<c014af90>] (cpu_startup_entry+0x18/0x1c) [ 54.020589] [<c014af90>] (cpu_startup_entry) from [<8010176c>] (0x8010176c) I use openwrt fork for Banana PI R2, it is available here: https://github.com/lancastr/openwrt/commits/bananapi-r2-with-eip97-and-letstrust Appreciate, Gleb Pomykalov
