EXT4-fs warning (device sda1): verify_group_input:104: Cannot add at group 59 (only 16 groups) ================================================================== BUG: KASAN: use-after-free in dev_map_flush_old kernel/bpf/devmap.c:389 [inline] BUG: KASAN: use-after-free in __dev_map_entry_free+0x2a9/0x330 kernel/bpf/devmap.c:403 Read of size 8 at addr ffff8880944e7e48 by task syz-executor.4/18140 CPU: 0 PID: 18140 Comm: syz-executor.4 Not tainted 5.0.0-rc6+ #52 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135 dev_map_flush_old kernel/bpf/devmap.c:389 [inline] __dev_map_entry_free+0x2a9/0x330 kernel/bpf/devmap.c:403 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0x928/0x1390 kernel/rcu/tree.c:2754 __do_softirq+0x266/0x95a kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:__jump_label_transform+0xae/0x330 arch/x86/kernel/jump_label.c:45 Code: 0f b6 05 a9 d2 60 00 88 45 9c 48 c7 c0 20 cf 8f 88 48 c1 e8 03 80 3c 30 00 0f 85 61 02 00 00 48 8d 55 d8 48 8b 1d 82 7a 8b 01 <48> b8 00 00 00 00 00 fc ff df 48 8d 7b 48 48 89 fe 48 c1 ee 03 80 RSP: 0018:ffff888062d178c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff111f9e4 RBX: ffffffff87655140 RCX: 0000000000000000 RDX: ffff888062d17958 RSI: dffffc0000000000 RDI: ffffffff886f7b00 RBP: ffff888062d17980 R08: 1ffffffff112ee84 R09: fffffbfff112ee85 R10: ffff888062d17980 R11: ffffffff88977427 R12: ffffffff886f7b00 R13: 1ffff1100c5a2f1b R14: 0000000000000000 R15: 0000000000000001 arch_jump_label_transform+0x2b/0x40 arch/x86/kernel/jump_label.c:99 __jump_label_update+0x16a/0x210 kernel/jump_label.c:389 jump_label_update kernel/jump_label.c:752 [inline] jump_label_update+0x1ce/0x3d0 kernel/jump_label.c:731 static_key_slow_inc_cpuslocked+0x1c1/0x250 kernel/jump_label.c:129 static_key_slow_inc+0x1b/0x30 kernel/jump_label.c:144 tracepoint_add_func kernel/tracepoint.c:268 [inline] tracepoint_probe_register_prio+0x56b/0x7b0 kernel/tracepoint.c:328 tracepoint_probe_register+0x2b/0x40 kernel/tracepoint.c:348 trace_event_reg+0x299/0x350 kernel/trace/trace_events.c:306 perf_trace_event_reg kernel/trace/trace_event_perf.c:124 [inline] perf_trace_event_init+0x500/0x990 kernel/trace/trace_event_perf.c:199 perf_trace_init+0x189/0x250 kernel/trace/trace_event_perf.c:223 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8352 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9808 [inline] perf_event_alloc.part.0+0xf98/0x2e00 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0x842/0x2730 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3e23414c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e29 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f3e234156d4 R13: 00000000004c4491 R14: 00000000004d7bf8 R15: 00000000ffffffff Allocated by task 18097: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:504 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3609 kmalloc include/linux/slab.h:545 [inline] kzalloc include/linux/slab.h:740 [inline] dev_map_alloc kernel/bpf/devmap.c:102 [inline] dev_map_alloc+0x1be/0x6e0 kernel/bpf/devmap.c:88 find_and_alloc_map kernel/bpf/syscall.c:129 [inline] map_create kernel/bpf/syscall.c:526 [inline] __do_sys_bpf+0x97b/0x3ea0 kernel/bpf/syscall.c:2685 __se_sys_bpf kernel/bpf/syscall.c:2662 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2662 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 7745: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:458 kasan_slab_free+0xe/0x10 mm/kasan/common.c:466 __cache_free mm/slab.c:3487 [inline] kfree+0xcf/0x230 mm/slab.c:3806 dev_map_free+0x43c/0x540 kernel/bpf/devmap.c:192 bpf_map_free_deferred+0xba/0xf0 kernel/bpf/syscall.c:290 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8880944e7d40 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 264 bytes inside of 512-byte region [ffff8880944e7d40, ffff8880944e7f40) The buggy address belongs to the page: page:ffffea00025139c0 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0x0 flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea000246cf48 ffffea0001aaf2c8 ffff88812c3f0940 raw: 0000000000000000 ffff8880944e70c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880944e7d00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8880944e7d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880944e7e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880944e7e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880944e7f00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================