Il giorno lun 16 mag 2022 alle ore 15:56 Arturo Laurenzi
<[email protected]> ha scritto:
>
> > The call-stack is not reported as fully reliable. Are you running with
> > CONFIG_DEBUG_INFO=y? Do you have CONFIG_UNWINDER_ORC=y?
> >
> > Assuming it is reliable, we may try to run some irq-work that no longer
> > exists. But that's speculation.
> >
> > What may help here is ftrace dump on panic, see
> > https://www.kernel.org/doc/html/latest/admin-guide/sysctl/kernel.html#ftrace-dump-on-oops
> >
> > Jan
>
> Hi Jan, all,
> sorry for getting back to you after so long. Our test machine hasn't
> been available for a period of time, due to independent reasons.
> We now enable debug information when building the kernel, as well as
> ftrace support. You might want to check the attached .config
> for correctness.
Sorry, missing attachment!
> We add the cmd line parameter that you suggested
> (ftrace_dump_on_oops), and enable function_graphs as current tracer.
> Here's the resulting serial dump.
>
> [ 444.320303] kernel tried to execute NX-protected page - exploit
> attempt? (uid: 1000)
> [ 444.320306] BUG: unable to handle page fault for address: ffff963f5a327040
> [ 444.320309] #PF: supervisor instruction fetch in kernel mode
> [ 444.320311] #PF: error_code(0x0011) - permissions violation
> [ 444.320313] PGD 44e001067 P4D 44e001067 PUD 80000001800001e3
> [ 444.320323] Oops: 0011 [#1] SMP PTI IRQ_PIPELINE
> [ 444.320326] CPU: 7 PID: 4206 Comm: xbot2-core Not tainted
> 5.10.89-xeno-ipipe-3.1+ #7
> [ 444.320328] Hardware name: /TS175, BIOS BQKLR112 07/04/2017
> [ 444.320330] IRQ stage: Linux
> [ 444.320333] RIP: 0010:0xffff963f5a327040
> [ 444.320336] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 <00> 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 08 a4 8
> [ 444.320338] RSP: 0018:ffff981f00238f90 EFLAGS: 00010202
> [ 444.320343] RAX: ffff963f5a327040 RBX: ffff981f0339fdd0 RCX:
> 0000000000000000
> [ 444.320346] RDX: ffff981f0339fdd8 RSI: ffff96421fd80000 RDI:
> ffff981f0339fdd0
> [ 444.320348] RBP: 000000000339fe70 R08: 0000000000000048 R09:
> ffff963f349f3000
> [ 444.320350] R10: 0000000000000002 R11: ffff963f349e0a60 R12:
> 000000000339fe70
> [ 444.320353] R13: 0000000000000000 R14: 0000000000000024 R15:
> 0000000000000000
> [ 444.320355] FS: 00007f52856c5600(0000) GS:ffff96421fd80000(0000)
> knlGS:0000000000000000
> [ 444.320358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 444.320360] CR2: ffff963f5a327040 CR3: 000000019a0d4005 CR4:
> 00000000003706e0
> [ 444.320363] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 444.320365] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [ 444.320368] Call Trace:
> [ 444.320370] <IRQ>
> [ 444.320372] ? irq_work_single+0x2c/0x40
> [ 444.320375] ? irq_work_run_list+0x2d/0x40
> [ 444.320377] ? irq_work_run+0x14/0x30
> [ 444.320380] ? inband_work_interrupt+0xa/0x10
> [ 444.320382] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320384] ? handle_synthetic_irq+0x61/0xf0
> [ 444.320387] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320389] ? asm_call_irq_on_stack+0x12/0x20
> [ 444.320391] </IRQ>
> [ 444.320394] ? arch_do_IRQ_pipelined+0xbe/0x140
> [ 444.320396] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320399] ? sync_current_irq_stage+0x1af/0x230
> [ 444.320401] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320403] ? __inband_irq_enable+0x47/0x50
> [ 444.320406] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320408] ? _raw_spin_unlock_irqrestore+0x1e/0x20
> [ 444.320411] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320413] ? __set_cpus_allowed_ptr+0xa1/0x230
> [ 444.320415] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320418] ? sched_setaffinity+0x1b0/0x290
> [ 444.320420] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320423] ? __x64_sys_sched_setaffinity+0x4e/0x90
> [ 444.320425] ? ftrace_graph_caller+0xa0/0xa0
> [ 444.320427] ? do_syscall_64+0x3f/0x90
> [ 444.320430] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 444.320432] Modules linked in: fuse rtpacket binfmt_misc nls_ascii
> nls_cp437 vfat fat i915 rt_e1000e i2c_algo_bit evdev drm_kms_helper
> cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fon
> [ 444.320553] Dumping ftrace buffer:
> [ 444.320556] ---------------------------------
> [ 444.320558] CPU:5 [LOST 200196842 EVENTS]
> [ 444.320561] 5) 0.903 us | } /* down_write */
> [ 444.320563] 5) 0.255 us |
> anon_vma_interval_tree_insert();
> [ 444.320566] 5) 0.175 us | up_write();
> [ 444.320568] 5) 7.399 us | } /* anon_vma_clone */
> [ 444.320571] 5) | kmem_cache_alloc() {
> [ 444.320573] 5) | _cond_resched() {
> [ 444.320576] 5) 0.173 us | rcu_all_qs();
> [ 444.320578] 5) 0.535 us | }
> [ 444.320580] 5) 0.174 us | should_failslab();
> [ 444.320583] 5) 0.173 us | mem_cgroup_from_task();
> [ 444.320585] 5) 0.173 us | rcu_read_unlock_strict();
> [ 444.320588] 5) 0.171 us | rcu_read_unlock_strict();
> [ 444.320590] 5) | obj_cgroup_charge() {
> [ 444.320593] 5) 0.182 us | __inband_irq_enable();
> [ 444.320595] 5) 0.542 us | }
> [ 444.320598] 5) | _cond_resched() {
> [ 444.320600] 5) 0.175 us | rcu_all_qs();
> [ 444.320602] 5) 0.532 us | }
> [ 444.320605] 5) 0.184 us | __inband_irq_enable();
> [ 444.320607] 5) 0.171 us | rcu_read_unlock_strict();
> [ 444.320610] 5) | __mod_memcg_lruvec_state() {
> [ 444.320612] 5) 0.176 us | __mod_memcg_state();
> [ 444.320615] 5) 0.543 us | }
> [ 444.320617] 5) 0.186 us | __inband_irq_enable();
> [ 444.320619] 5) 0.173 us | rcu_read_unlock_strict();
> [ 444.320622] 5) 0.172 us | rcu_read_unlock_strict();
> [ 444.320624] 5) 6.404 us | }
> [ 444.320627] 5) | kmem_cache_alloc() {
> [ 444.320629] 5) | _cond_resched() {
> [ 444.320632] 5) 0.172 us | rcu_all_qs();
> [ 444.320634] 5) 0.547 us | }
> [ 444.320636] 5) 0.174 us | should_failslab();
> [ 444.320639] 5) 0.177 us | mem_cgroup_from_task();
> [ 444.320641] 5) 0.173 us | rcu_read_unlock_strict();
> [ 444.320644] 5) 0.168 us | rcu_read_unlock_strict();
> [ 444.320646] 5) | obj_cgroup_charge() {
> [ 444.320649] 5) 0.186 us | __inband_irq_enable();
> [ 444.320651] 5) 0.172 us | rcu_read_unlock_strict();
> [ 444.320654] 5) 0.174 us | rcu_read_unlock_strict();
> [ 444.320656] 5) | __memcg_kmem_charge() {
> [ 444.320659] 5) | try_charge() {
> [ 444.320661] 5) 0.180 us | __inband_irq_enable();
> [ 444.320663] 5) 0.557 us | }
> [ 444.320666] 5) | page_counter_try_charge()
> {
> [ 444.320668] 5) 0.172 us |
> propagate_protected_usage();
> [ 444.320671] 5) 0.171 us |
> propagate_protected_usage();
> [ 444.320673] 5) 0.172 us |
> propagate_protected_usage();
> [ 444.320676] 5) 0.179 us |
> propagate_protected_usage();
> [ 444.320678] 5) 1.635 us | }
> [ 444.320681] 5) 2.748 us | }
> [ 444.320683] 5) | refill_obj_stock() {
> [ 444.320686] 5) 0.183 us | __inband_irq_enable();
> [ 444.320688] 5) 0.541 us | }
> [ 444.320691] 5) 0.173 us | rcu_read_unlock_strict();
> [ 444.320693] 5) 5.330 us | }
> [ 444.320695] 5) | _cond_resched() {
> [ 444.320698] 5) 0.192 us | rcu_all_qs();
> [ 444.320700] 5) 0.551 us | }
> [ 444.320703] 5) 0.186 us | __inband_irq_enable();
> [ 444.320705] 5) 0.176 us | rcu_read_unlock_strict();
> [ 444.320708] 5) | __mod_memcg_lruvec_state() {
> [ 444.320710] 5) 0.177 us | __mod_memcg_state();
> [ 444.320712] 5) 0.548 us | }
> [ 444.320715] 5) 0.186 us | __inband_irq_enable();
> [ 444.320717] 5) 0.176 us | rcu_read_unlock_strict();
> [ 444.320720] 5) 0.174 us | rcu_read_unlock_strict();
> [ 444.320722] 5) + 11.236 us | }
> [ 444.320725] 5) | down_write() {
> [ 444.320727] 5) | _cond_resched() {
> [ 444.320730] 5) 0.173 us | rcu_all_qs();
> [ 444.320732] 5) 0.533 us | }
> [ 444.320734] 5) 0.899 us | }
> [ 444.320737] 5) 0.195 us | anon_vma_interval_tree_insert();
> [ 444.320739] 5) 0.176 us | up_write();
> [ 444.320742] 5) + 27.739 us | } /* anon_vma_fork */
> [ 444.320744] 5) | __vma_link_rb() {
> [ 444.320747] 5) 0.184 us | vma_gap_callbacks_rotate();
> [ 444.320749] 5) 0.570 us | }
> [ 444.320751] 5) | copy_page_range() {
> [ 444.320754] 5) | _cond_resched() {
> [ 444.320756] 5) 0.178 us | rcu_all_qs();
> [ 444.320759] 5) 0.538 us | }
> [ 444.320761] 5) 0.177 us | _raw_spin_lock();
> [ 444.320763] 5) 0.179 us | _raw_spin_lock();
> [ 444.320766] 5) | _cond_resched() {
> [ 444.320768] 5) 0.176 us | rcu_all_qs();
> [ 444.320771] 5) 0.535 us | }
> [ 444.320773] 5) | __pte_alloc() {
> [ 444.320776] 5) | pte_alloc_one() {
> [ 444.320778] 5) | alloc_pages_current() {
> [ 444.320781] 5) 0.178 us | get_task_policy.part.0();
> [ 444.320783] 5) 0.176 us | policy_nodemask();
> [ 444.320785] 5) 0.178 us | policy_node();
> [ 444.320788] 5) | __alloc_pages_nodemask() {
> [ 444.320790] 5) | _cond_resched() {
> [ 444.320793] 5) 0.176 us | rcu_all_qs();
> [ 444.320795] 5) 0.540 us | }
> [ 444.320798] 5) 0.174 us |
> [ 444.320803] Lost 233836 message(s)!
> [ 455.241663] ---[ end trace f09305f9ddaf2ac5 ]---
> [ 455.241667] RIP: 0010:0xffff963f5a327040
> [ 455.241671] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 <00> 00 00 00 00 00 00 00 70 00 00 00 00 00 00 00 08 a4 8
> [ 455.241675] RSP: 0018:ffff981f00238f90 EFLAGS: 00010202
> [ 455.241683] RAX: ffff963f5a327040 RBX: ffff981f0339fdd0 RCX:
> 0000000000000000
> [ 455.241687] RDX: ffff981f0339fdd8 RSI: ffff96421fd80000 RDI:
> ffff981f0339fdd0
> [ 455.241690] RBP: 000000000339fe70 R08: 0000000000000048 R09:
> ffff963f349f3000
> [ 455.241694] R10: 0000000000000002 R11: ffff963f349e0a60 R12:
> 000000000339fe70
> [ 455.241698] R13: 0000000000000000 R14: 0000000000000024 R15:
> 0000000000000000
> [ 455.241702] FS: 00007f52856c5600(0000) GS:ffff96421fd80000(0000)
> knlGS:0000000000000000
> [ 455.241705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 455.241707] CR2: ffff963f5a327040 CR3: 000000019a0d4005 CR4:
> 00000000003706e0
> [ 455.241710] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 455.241712] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [ 455.241715] Kernel panic - not syncing: Fatal exception in interrupt
> [ 455.242117] Dumping ftrace buffer:
> [ 455.242119] (ftrace buffer empty)
> [ 455.242122] Kernel Offset: 0x34c00000 from 0xffffffff81000000
> (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
>
>
> Does this help in any way? What else can we do to increase the amount
> of reported information?
>
> Thanks,
> Arturo and Davide
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