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KASAN: use-after-free Read in nr_rx_frame | 1 (2) | 2019/01/07 19:02 |
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KASAN: use-after-free Read in nr_rx_frame | 1 (2) | 2019/01/07 19:02 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: use-after-free Read in nr_rx_frame (2) hams | C | done | 3 | 1891d | 1899d | 12/28 | fixed on 2019/08/27 17:15 |
IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 ================================================================== BUG: KASAN: use-after-free in sk_acceptq_added include/net/sock.h:855 [inline] BUG: KASAN: use-after-free in nr_rx_frame+0x1c5f/0x1d50 net/netrom/af_netrom.c:1012 Read of size 4 at addr ffff8880969d07e8 by task swapper/0/0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.20.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 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_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134 sk_acceptq_added include/net/sock.h:855 [inline] nr_rx_frame+0x1c5f/0x1d50 net/netrom/af_netrom.c:1012 nr_loopback_timer+0x7b/0x170 net/netrom/nr_loopback.c:62 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 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+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 </IRQ> RIP: 0010:native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:58 Code: ff ff ff 48 89 c7 48 89 45 d8 e8 59 49 d3 f9 48 8b 45 d8 e9 ce fe ff ff 48 89 df e8 48 49 d3 f9 eb 82 90 90 90 90 90 90 fb f4 <c3> 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f4 c3 90 90 90 90 90 90 RSP: 0018:ffffffff89807c60 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13249e9 RBX: 1ffffffff1300f8f RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff8987b73c RBP: ffffffff89807d20 R08: ffffffff8987aec0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff89807cf8 R14: 0000000000000000 R15: ffffffff89924f38 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:555 default_idle_call+0x36/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x386/0x5d0 kernel/sched/idle.c:262 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:353 rest_init+0x245/0x37b init/main.c:443 arch_call_rest_init+0xe/0x1b start_kernel+0x882/0x8bd init/main.c:741 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Allocated by task 10788: save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] kasan_kmalloc mm/kasan/common.c:482 [inline] kasan_kmalloc+0xcf/0xe0 mm/kasan/common.c:455 __do_kmalloc mm/slab.c:3709 [inline] __kmalloc+0x15c/0x740 mm/slab.c:3718 kmalloc include/linux/slab.h:550 [inline] sk_prot_alloc+0x19c/0x2e0 net/core/sock.c:1477 sk_alloc+0xd7/0x1690 net/core/sock.c:1531 nr_create+0xb9/0x5e0 net/netrom/af_netrom.c:436 __sock_create+0x532/0x930 net/socket.c:1277 sock_create net/socket.c:1317 [inline] __sys_socket+0x106/0x260 net/socket.c:1347 __do_sys_socket net/socket.c:1356 [inline] __se_sys_socket net/socket.c:1354 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1354 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10834: 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:444 kasan_slab_free+0xe/0x10 mm/kasan/common.c:452 __cache_free mm/slab.c:3485 [inline] kfree+0xcf/0x230 mm/slab.c:3804 sk_prot_free net/core/sock.c:1514 [inline] __sk_destruct+0x76d/0xa60 net/core/sock.c:1596 sk_destruct+0x7b/0x90 net/core/sock.c:1604 __sk_free+0xce/0x300 net/core/sock.c:1615 sk_free+0x42/0x50 net/core/sock.c:1626 sock_put include/net/sock.h:1703 [inline] nr_release+0x337/0x3c0 net/netrom/af_netrom.c:557 __sock_release+0xd3/0x250 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1141 __fput+0x3c5/0xb10 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113 get_signal+0x168d/0x19b0 kernel/signal.c:2347 do_signal+0x91/0x1e80 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880969d0440 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 936 bytes inside of 2048-byte region [ffff8880969d0440, ffff8880969d0c40) The buggy address belongs to the page: page:ffffea00025a7400 count:1 mapcount:0 mapping:ffff88812c3f0c40 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea000292f708 ffffea00023ae408 ffff88812c3f0c40 raw: 0000000000000000 ffff8880969d0440 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880969d0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880969d0700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880969d0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880969d0800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880969d0880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
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2019/01/01 22:00 | upstream | e1ef035d272e | 3d85f48c | .config | console log | report | syz | ci-upstream-kasan-gce-root | ||||
2019/01/08 21:20 | net-next-old | b71acb0e3721 | 010ed08b | .config | console log | report | ci-upstream-net-kasan-gce |