================================================================== BUG: KASAN: slab-out-of-bounds in primary_event_id kernel/events/core.c:1316 [inline] BUG: KASAN: slab-out-of-bounds in perf_output_read_group kernel/events/core.c:5895 [inline] BUG: KASAN: slab-out-of-bounds in perf_output_read+0x1046/0x1090 kernel/events/core.c:5930 Read of size 8 at addr ffff8880b45c3fe0 by task syz-executor709/10152 CPU: 1 PID: 10152 Comm: syz-executor709 Not tainted 4.14.216-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 primary_event_id kernel/events/core.c:1316 [inline] perf_output_read_group kernel/events/core.c:5895 [inline] perf_output_read+0x1046/0x1090 kernel/events/core.c:5930 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5972 __perf_event_output kernel/events/core.c:6285 [inline] perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6298 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7547 perf_swevent_overflow kernel/events/core.c:7623 [inline] perf_swevent_event+0x299/0x460 kernel/events/core.c:7651 do_perf_sw_event kernel/events/core.c:7764 [inline] ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7795 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7807 perf_sw_event include/linux/perf_event.h:1046 [inline] __do_page_fault+0x692/0xad0 arch/x86/mm/fault.c:1483 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1123 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 RSP: 0018:ffff88809da07a78 EFLAGS: 00010206 RAX: ffffed1013470000 RBX: 0000000000008000 RCX: 0000000000002acb RDX: 0000000000008000 RSI: 0000000020f6b000 RDI: ffff88809a37d535 RBP: 0000000020f65acb R08: 0000000000000001 R09: ffffed101346ffff R10: ffff88809a37ffff R11: 0000000000000000 R12: ffff88809a378000 R13: 00007ffffffff000 R14: 0000000020f6dacb R15: ffff88809a378000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline] copyin+0x99/0xc0 lib/iov_iter.c:146 _copy_from_iter_full+0x197/0x690 lib/iov_iter.c:608 copy_from_iter_full include/linux/uio.h:126 [inline] skb_do_copy_data_nocache include/net/sock.h:1889 [inline] skb_copy_to_page_nocache include/net/sock.h:1915 [inline] tcp_sendmsg_locked+0x23fc/0x2ef0 net/ipv4/tcp.c:1360 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 SYSC_sendto net/socket.c:1763 [inline] SyS_sendto+0x1c7/0x2c0 net/socket.c:1731 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x44c249 RSP: 002b:00007f25d8d69cd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000006e2c48 RCX: 000000000044c249 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006 RBP: 00000000006e2c40 R08: 0000000000000000 R09: 0000000000000053 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e2c4c R13: 00007ffce20f218f R14: 00007f25d8d6a9c0 R15: 20c49ba5e353f7cf Allocated by task 10145: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] pskb_expand_head+0x128/0xd30 net/core/skbuff.c:1462 __skb_pad+0x1ff/0x5d0 net/core/skbuff.c:1638 __skb_put_padto include/linux/skbuff.h:3022 [inline] skb_put_padto include/linux/skbuff.h:3041 [inline] send_hsr_supervision_frame+0xc2c/0xf00 net/hsr/hsr_device.c:318 hsr_announce+0xf0/0x330 net/hsr/hsr_device.c:350 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x254/0xa1d kernel/softirq.c:288 Freed by task 17: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 skb_free_head net/core/skbuff.c:554 [inline] skb_release_data+0x5f6/0x820 net/core/skbuff.c:574 skb_release_all net/core/skbuff.c:631 [inline] __kfree_skb net/core/skbuff.c:645 [inline] kfree_skb+0xe7/0x390 net/core/skbuff.c:663 __netif_receive_skb_core+0x427/0x2a30 net/core/dev.c:4481 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512 process_backlog+0x218/0x6f0 net/core/dev.c:5194 napi_poll net/core/dev.c:5596 [inline] net_rx_action+0x466/0xfd0 net/core/dev.c:5662 __do_softirq+0x254/0xa1d kernel/softirq.c:288 The buggy address belongs to the object at ffff8880b45c3d00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 224 bytes to the right of 512-byte region [ffff8880b45c3d00, ffff8880b45c3f00) The buggy address belongs to the page: page:ffffea0002d170c0 count:1 mapcount:0 mapping:ffff8880b45c3080 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880b45c3080 0000000000000000 0000000100000006 raw: ffffea000264cea0 ffffea00026742a0 ffff88813fe80940 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b45c3e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880b45c3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880b45c3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880b45c4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880b45c4080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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