On Wed, Mar 10, 2021 at 11:41AM +0100, Marco Elver wrote:
Adds bit perf_event_attr::remove_on_exec, to support removing an event from a task on exec.
This option supports the case where an event is supposed to be process-wide only, and should not propagate beyond exec, to limit monitoring to the original process image only.
[...]
+static void perf_remove_from_owner(struct perf_event *event); +static void perf_event_exit_event(struct perf_event *child_event,
struct perf_event_context *child_ctx,struct task_struct *child);+/*
- Removes all events from the current task that have been marked
- remove-on-exec, and feeds their values back to parent events.
- */
+static void perf_event_remove_on_exec(void) +{
- int ctxn;
- for_each_task_context_nr(ctxn) {
struct perf_event_context *ctx;struct perf_event *event, *next;ctx = perf_pin_task_context(current, ctxn);if (!ctx)continue;mutex_lock(&ctx->mutex);list_for_each_entry_safe(event, next, &ctx->event_list, event_entry) {if (!event->attr.remove_on_exec)continue;if (!is_kernel_event(event))perf_remove_from_owner(event);perf_remove_from_context(event, DETACH_GROUP);/** Remove the event and feed back its values to the* parent event.*/perf_event_exit_event(event, ctx, current);}mutex_unlock(&ctx->mutex);put_ctx(ctx);- }
+}
Yikes; it seems this is somehow broken. I just decided to run the remove_on_exec kselftest in a loop like so:
for x in {1..10}; do ( tools/testing/selftests/perf_events/remove_on_exec & ) ; done
While the kselftest runs pass, I see a number of kernel warnings (below).
Any suggestions?
I'll go and try to debug this...
Thanks, -- Marco
------ >8 ------
hardirqs last disabled at (4150): [<ffffffffa633219b>] sysvec_call_function_single+0xb/0xc0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3846): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 softirqs last disabled at (3839): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 ---[ end trace 74c79be9940ec2d1 ]--- ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1369 at kernel/events/core.c:247 event_function+0xef/0x100 kernel/events/core.c:249 Modules linked in: CPU: 3 PID: 1369 Comm: exe Tainted: G W 5.12.0-rc2+ #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 RIP: 0010:event_function+0xef/0x100 kernel/events/core.c:247 Code: 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b 05 a5 79 88 5a 85 c0 0f 84 6e ff ff ff 0f 0b e9 67 ff ff ff 4c 39 f5 74 a7 0f 0b eb a3 <0f> 0b eb 9f 0f 0b eb 96 41 bd fd ff ff ff eb ac 90 48 8b 47 10 48 RSP: 0000:ffff980880158f70 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff98088111fde0 RCX: 944f9e9405e234a1 RDX: ffff8a5d4d2ac340 RSI: ffffffffa6b4ccef RDI: ffff8a606fcf0c08 RBP: ffff8a606fcf0c00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: 0000000000000000 R13: ffff8a5d4e6db800 R14: ffff8a5d46534a00 R15: ffff8a606fcf0c08 FS: 0000000000000000(0000) GS:ffff8a606fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2b331e225 CR3: 00000001e0e22006 CR4: 0000000000770ee0 DR0: 0000564596006388 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <IRQ> remote_function kernel/events/core.c:91 [inline] remote_function+0x44/0x50 kernel/events/core.c:71 flush_smp_call_function_queue+0x13a/0x1d0 kernel/smp.c:395 __sysvec_call_function_single+0x3e/0x1c0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243 </IRQ> asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:640 RIP: 0010:lock_page_memcg+0xc7/0x170 mm/memcontrol.c:2157 Code: 00 00 e8 6c ae e9 ff 48 c7 c6 d3 07 83 a5 58 4c 89 f7 e8 6c ab e9 ff 48 85 db 74 06 e8 22 e1 f3 ff fb 41 8b 84 24 00 0b 00 00 <85> c0 7e a7 4d 8d b4 24 70 06 00 00 4c 89 f7 e8 85 b2 b0 00 48 89 RSP: 0000:ffff980881bc7b38 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffffa6c1a6ed RDI: ffffffffa6b9ab37 RBP: ffffccff47891b80 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a5d403e9000 R13: ffffffffa58307d3 R14: ffff8a5d403e9688 R15: ffff8a5d47067128 page_remove_rmap+0xc/0xb0 mm/rmap.c:1348 zap_pte_range mm/memory.c:1276 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0x612/0xb00 mm/memory.c:1451 unmap_vmas+0xbe/0x150 mm/memory.c:1528 exit_mmap+0x8f/0x1d0 mm/mmap.c:3218 __mmput kernel/fork.c:1082 [inline] mmput+0x3c/0xe0 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0x369/0xb60 kernel/exit.c:812 do_group_exit+0x34/0xb0 kernel/exit.c:922 get_signal+0x170/0xc80 kernel/signal.c:2775 arch_do_signal_or_restart+0xea/0x740 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:637 RIP: 0033:0x5598fc00409b Code: Unable to access opcode bytes at RIP 0x5598fc004071. RSP: 002b:00007ffe94151cf0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6db39331b0 RDX: 0000000000000004 RSI: 00007ffe94151cfc RDI: 0000000000000001 RBP: 00007ffe94151da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000059 R11: 0000000000000246 R12: 00005598fc0010d0 R13: 00007ffe94151ea0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 4150 hardirqs last enabled at (4149): [<ffffffffa583080e>] lock_page_memcg+0xbe/0x170 mm/memcontrol.c:2154 hardirqs last disabled at (4150): [<ffffffffa633219b>] sysvec_call_function_single+0xb/0xc0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3846): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 softirqs last disabled at (3839): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 ---[ end trace 74c79be9940ec2d2 ]--- ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1369 at kernel/events/core.c:2253 event_sched_out+0x4c/0x200 kernel/events/core.c:2253 Modules linked in: CPU: 3 PID: 1369 Comm: exe Tainted: G W 5.12.0-rc2+ #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 RIP: 0010:event_sched_out+0x4c/0x200 kernel/events/core.c:2253 Code: 92 01 85 c9 75 12 83 bb a8 00 00 00 01 74 26 5b 5d 41 5c 41 5d 41 5e c3 48 8d 7d 20 be ff ff ff ff e8 18 cd b9 00 85 c0 75 dc <0f> 0b 83 bb a8 00 00 00 01 75 da 48 8b 53 28 48 8b 4b 20 48 8d 43 RSP: 0000:ffff980880158f18 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8a5d4e6db800 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffffa6b4ccef RDI: ffffffffa6b9ab37 RBP: ffff8a5d46534a00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a606fcf0c00 R13: ffff8a606fcf0c00 R14: ffff8a5d46534a00 R15: ffff8a606fcf0c08 FS: 0000000000000000(0000) GS:ffff8a606fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2b331e225 CR3: 00000001e0e22006 CR4: 0000000000770ee0 DR0: 0000564596006388 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <IRQ> __perf_remove_from_context+0x29/0xd0 kernel/events/core.c:2333 event_function+0xab/0x100 kernel/events/core.c:252 remote_function kernel/events/core.c:91 [inline] remote_function+0x44/0x50 kernel/events/core.c:71 flush_smp_call_function_queue+0x13a/0x1d0 kernel/smp.c:395 __sysvec_call_function_single+0x3e/0x1c0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243 </IRQ> asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:640 RIP: 0010:lock_page_memcg+0xc7/0x170 mm/memcontrol.c:2157 Code: 00 00 e8 6c ae e9 ff 48 c7 c6 d3 07 83 a5 58 4c 89 f7 e8 6c ab e9 ff 48 85 db 74 06 e8 22 e1 f3 ff fb 41 8b 84 24 00 0b 00 00 <85> c0 7e a7 4d 8d b4 24 70 06 00 00 4c 89 f7 e8 85 b2 b0 00 48 89 RSP: 0000:ffff980881bc7b38 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffffa6c1a6ed RDI: ffffffffa6b9ab37 RBP: ffffccff47891b80 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a5d403e9000 R13: ffffffffa58307d3 R14: ffff8a5d403e9688 R15: ffff8a5d47067128 page_remove_rmap+0xc/0xb0 mm/rmap.c:1348 zap_pte_range mm/memory.c:1276 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0x612/0xb00 mm/memory.c:1451 unmap_vmas+0xbe/0x150 mm/memory.c:1528 exit_mmap+0x8f/0x1d0 mm/mmap.c:3218 __mmput kernel/fork.c:1082 [inline] mmput+0x3c/0xe0 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0x369/0xb60 kernel/exit.c:812 do_group_exit+0x34/0xb0 kernel/exit.c:922 get_signal+0x170/0xc80 kernel/signal.c:2775 arch_do_signal_or_restart+0xea/0x740 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:637 RIP: 0033:0x5598fc00409b Code: Unable to access opcode bytes at RIP 0x5598fc004071. RSP: 002b:00007ffe94151cf0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6db39331b0 RDX: 0000000000000004 RSI: 00007ffe94151cfc RDI: 0000000000000001 RBP: 00007ffe94151da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000059 R11: 0000000000000246 R12: 00005598fc0010d0 R13: 00007ffe94151ea0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 4150 hardirqs last enabled at (4149): [<ffffffffa583080e>] lock_page_memcg+0xbe/0x170 mm/memcontrol.c:2154 hardirqs last disabled at (4150): [<ffffffffa633219b>] sysvec_call_function_single+0xb/0xc0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3846): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 softirqs last disabled at (3839): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 ---[ end trace 74c79be9940ec2d3 ]--- ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1369 at kernel/events/core.c:2152 perf_group_detach+0xe1/0x300 kernel/events/core.c:2152 Modules linked in: CPU: 3 PID: 1369 Comm: exe Tainted: G W 5.12.0-rc2+ #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 RIP: 0010:perf_group_detach+0xe1/0x300 kernel/events/core.c:2152 Code: 41 5c 41 5d 41 5e 41 5f e9 bc 54 ff ff 48 8b 87 20 02 00 00 be ff ff ff ff 48 8d 78 20 e8 27 88 b9 00 85 c0 0f 85 41 ff ff ff <0f> 0b e9 3a ff ff ff 48 8b 45 10 4c 8b 28 48 8d 58 f0 49 83 ed 10 RSP: 0000:ffff980880158f10 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8a5d4e6db800 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffffa6b4ccef RDI: ffffffffa6b9ab37 RBP: ffff8a5d4e6db800 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a606fcf0c00 R13: 0000000000000001 R14: ffff8a5d46534a00 R15: ffff8a606fcf0c08 FS: 0000000000000000(0000) GS:ffff8a606fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2b331e225 CR3: 00000001e0e22006 CR4: 0000000000770ee0 DR0: 0000564596006388 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <IRQ> __perf_remove_from_context+0x91/0xd0 kernel/events/core.c:2335 event_function+0xab/0x100 kernel/events/core.c:252 remote_function kernel/events/core.c:91 [inline] remote_function+0x44/0x50 kernel/events/core.c:71 flush_smp_call_function_queue+0x13a/0x1d0 kernel/smp.c:395 __sysvec_call_function_single+0x3e/0x1c0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243 </IRQ> asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:640 RIP: 0010:lock_page_memcg+0xc7/0x170 mm/memcontrol.c:2157 Code: 00 00 e8 6c ae e9 ff 48 c7 c6 d3 07 83 a5 58 4c 89 f7 e8 6c ab e9 ff 48 85 db 74 06 e8 22 e1 f3 ff fb 41 8b 84 24 00 0b 00 00 <85> c0 7e a7 4d 8d b4 24 70 06 00 00 4c 89 f7 e8 85 b2 b0 00 48 89 RSP: 0000:ffff980881bc7b38 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffffa6c1a6ed RDI: ffffffffa6b9ab37 RBP: ffffccff47891b80 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a5d403e9000 R13: ffffffffa58307d3 R14: ffff8a5d403e9688 R15: ffff8a5d47067128 page_remove_rmap+0xc/0xb0 mm/rmap.c:1348 zap_pte_range mm/memory.c:1276 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0x612/0xb00 mm/memory.c:1451 unmap_vmas+0xbe/0x150 mm/memory.c:1528 exit_mmap+0x8f/0x1d0 mm/mmap.c:3218 __mmput kernel/fork.c:1082 [inline] mmput+0x3c/0xe0 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0x369/0xb60 kernel/exit.c:812 do_group_exit+0x34/0xb0 kernel/exit.c:922 get_signal+0x170/0xc80 kernel/signal.c:2775 arch_do_signal_or_restart+0xea/0x740 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:637 RIP: 0033:0x5598fc00409b Code: Unable to access opcode bytes at RIP 0x5598fc004071. RSP: 002b:00007ffe94151cf0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6db39331b0 RDX: 0000000000000004 RSI: 00007ffe94151cfc RDI: 0000000000000001 RBP: 00007ffe94151da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000059 R11: 0000000000000246 R12: 00005598fc0010d0 R13: 00007ffe94151ea0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 4150 hardirqs last enabled at (4149): [<ffffffffa583080e>] lock_page_memcg+0xbe/0x170 mm/memcontrol.c:2154 hardirqs last disabled at (4150): [<ffffffffa633219b>] sysvec_call_function_single+0xb/0xc0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3846): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 softirqs last disabled at (3839): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 ---[ end trace 74c79be9940ec2d4 ]--- ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1369 at kernel/events/core.c:1993 list_del_event+0xaf/0x110 kernel/events/core.c:1993 Modules linked in: CPU: 3 PID: 1369 Comm: exe Tainted: G W 5.12.0-rc2+ #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 RIP: 0010:list_del_event+0xaf/0x110 kernel/events/core.c:1993 Code: 00 00 01 eb ba be ff ff ff ff 48 89 ef e8 b9 fe ff ff eb db 48 8d 7b 20 be ff ff ff ff e8 39 1d ba 00 85 c0 0f 85 72 ff ff ff <0f> 0b e9 6b ff ff ff 48 8d 83 e8 00 00 00 f6 85 08 01 00 00 04 48 RSP: 0000:ffff980880158f28 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8a5d46534a00 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffffa6b4ccef RDI: ffffffffa6b9ab37 RBP: ffff8a5d4e6db800 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a606fcf0c00 R13: 0000000000000001 R14: ffff8a5d46534a00 R15: ffff8a606fcf0c08 FS: 0000000000000000(0000) GS:ffff8a606fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2b331e225 CR3: 00000001e0e22006 CR4: 0000000000770ee0 DR0: 0000564596006388 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <IRQ> __perf_remove_from_context+0x3a/0xd0 kernel/events/core.c:2336 event_function+0xab/0x100 kernel/events/core.c:252 remote_function kernel/events/core.c:91 [inline] remote_function+0x44/0x50 kernel/events/core.c:71 flush_smp_call_function_queue+0x13a/0x1d0 kernel/smp.c:395 __sysvec_call_function_single+0x3e/0x1c0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x89/0xc0 arch/x86/kernel/smp.c:243 </IRQ> asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:640 RIP: 0010:lock_page_memcg+0xc7/0x170 mm/memcontrol.c:2157 Code: 00 00 e8 6c ae e9 ff 48 c7 c6 d3 07 83 a5 58 4c 89 f7 e8 6c ab e9 ff 48 85 db 74 06 e8 22 e1 f3 ff fb 41 8b 84 24 00 0b 00 00 <85> c0 7e a7 4d 8d b4 24 70 06 00 00 4c 89 f7 e8 85 b2 b0 00 48 89 RSP: 0000:ffff980881bc7b38 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffffa6c1a6ed RDI: ffffffffa6b9ab37 RBP: ffffccff47891b80 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8a5d4d2accb8 R12: ffff8a5d403e9000 R13: ffffffffa58307d3 R14: ffff8a5d403e9688 R15: ffff8a5d47067128 page_remove_rmap+0xc/0xb0 mm/rmap.c:1348 zap_pte_range mm/memory.c:1276 [inline] zap_pmd_range mm/memory.c:1380 [inline] zap_pud_range mm/memory.c:1409 [inline] zap_p4d_range mm/memory.c:1430 [inline] unmap_page_range+0x612/0xb00 mm/memory.c:1451 unmap_vmas+0xbe/0x150 mm/memory.c:1528 exit_mmap+0x8f/0x1d0 mm/mmap.c:3218 __mmput kernel/fork.c:1082 [inline] mmput+0x3c/0xe0 kernel/fork.c:1103 exit_mm kernel/exit.c:501 [inline] do_exit+0x369/0xb60 kernel/exit.c:812 do_group_exit+0x34/0xb0 kernel/exit.c:922 get_signal+0x170/0xc80 kernel/signal.c:2775 arch_do_signal_or_restart+0xea/0x740 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:637 RIP: 0033:0x5598fc00409b Code: Unable to access opcode bytes at RIP 0x5598fc004071. RSP: 002b:00007ffe94151cf0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6db39331b0 RDX: 0000000000000004 RSI: 00007ffe94151cfc RDI: 0000000000000001 RBP: 00007ffe94151da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000059 R11: 0000000000000246 R12: 00005598fc0010d0 R13: 00007ffe94151ea0 R14: 0000000000000000 R15: 0000000000000000 irq event stamp: 4150 hardirqs last enabled at (4149): [<ffffffffa583080e>] lock_page_memcg+0xbe/0x170 mm/memcontrol.c:2154 hardirqs last disabled at (4150): [<ffffffffa633219b>] sysvec_call_function_single+0xb/0xc0 arch/x86/kernel/smp.c:243 softirqs last enabled at (3846): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (3846): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 softirqs last disabled at (3839): [<ffffffffa566f621>] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (3839): [<ffffffffa566f621>] irq_exit_rcu+0xe1/0x120 kernel/softirq.c:434 ---[ end trace 74c79be9940ec2d5 ]---