Title | Replies (including bot) | Last reply |
---|---|---|
KASAN: use-after-free Read in finish_task_switch | 0 (2) | 2018/08/12 20:50 |
syzbot |
sign-in | mailing list | source | docs |
Title | Replies (including bot) | Last reply |
---|---|---|
KASAN: use-after-free Read in finish_task_switch | 0 (2) | 2018/08/12 20:50 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: use-after-free Read in finish_task_switch (2) kernel | syz | done | 1 | 1871d | 1870d | 0/27 | closed as dup on 2019/07/24 07:07 |
urandom_read: 1 callbacks suppressed random: sshd: uninitialized urandom read (32 bytes read) hrtimer: interrupt took 35369 ns L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details. ================================================================== BUG: KASAN: use-after-free in __fire_sched_in_preempt_notifiers kernel/sched/core.c:2481 [inline] BUG: KASAN: use-after-free in fire_sched_in_preempt_notifiers kernel/sched/core.c:2487 [inline] BUG: KASAN: use-after-free in finish_task_switch+0x544/0x870 kernel/sched/core.c:2679 Read of size 8 at addr ffff8801c7b20058 by task syz-executor815/4696 CPU: 0 PID: 4696 Comm: syz-executor815 Not tainted 4.19.0-rc2+ #220 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __fire_sched_in_preempt_notifiers kernel/sched/core.c:2481 [inline] fire_sched_in_preempt_notifiers kernel/sched/core.c:2487 [inline] finish_task_switch+0x544/0x870 kernel/sched/core.c:2679 context_switch kernel/sched/core.c:2828 [inline] __schedule+0x884/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue_me+0x3f9/0x840 kernel/futex.c:2530 futex_wait+0x45b/0xa20 kernel/futex.c:2645 do_futex+0x336/0x27d0 kernel/futex.c:3528 __do_sys_futex kernel/futex.c:3589 [inline] __se_sys_futex kernel/futex.c:3557 [inline] __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3557 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4464d9 Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd07b576da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 00000000004464d9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc58 RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c R13: 6d766b2f7665642f R14: 00007fd07b5779c0 R15: 0000000000000003 Allocated by task 4698: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x710 mm/slab.c:3554 kmem_cache_zalloc include/linux/slab.h:697 [inline] vmx_create_vcpu+0xcf/0x2830 arch/x86/kvm/vmx.c:10954 kvm_arch_vcpu_create+0xe5/0x220 arch/x86/kvm/x86.c:8434 kvm_vm_ioctl_create_vcpu arch/x86/kvm/../../../virt/kvm/kvm_main.c:2476 [inline] kvm_vm_ioctl+0x488/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2977 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 4668: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x280 mm/slab.c:3756 vmx_free_vcpu+0x26b/0x300 arch/x86/kvm/vmx.c:10948 kvm_arch_vcpu_free arch/x86/kvm/x86.c:8420 [inline] kvm_free_vcpus arch/x86/kvm/x86.c:8870 [inline] kvm_arch_destroy_vm+0x365/0x7c0 arch/x86/kvm/x86.c:8967 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:752 [inline] kvm_put_kvm+0x73f/0x1060 arch/x86/kvm/../../../virt/kvm/kvm_main.c:773 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2407 __fput+0x38a/0xa40 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801c7b20040 which belongs to the cache kvm_vcpu of size 23872 The buggy address is located 24 bytes inside of 23872-byte region [ffff8801c7b20040, ffff8801c7b25d80) The buggy address belongs to the page: page:ffffea00071ec800 count:1 mapcount:0 mapping:ffff8801d523fb40 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801d7395148 ffffea00071f7408 ffff8801d523fb40 raw: 0000000000000000 ffff8801c7b20040 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c7b1ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801c7b1ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801c7b20000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8801c7b20080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801c7b20100: 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/09/03 08:50 | upstream | 60c1f89241d4 | a4718693 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2018/08/14 21:31 | linux-next | 4e8b38549b50 | 5084a625 | .config | console log | report | syz | C | ci-upstream-linux-next-kasan-gce-root | |||
2018/08/12 20:49 | linux-next | 4110b42356f3 | 7a88b141 | .config | console log | report | syz | C | ci-upstream-linux-next-kasan-gce-root | |||
2018/09/21 18:43 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | syz | ci-upstream-kasan-gce | ||||
2018/09/21 13:54 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | syz | ci-upstream-kasan-gce-selinux-root | ||||
2018/09/21 09:11 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | syz | ci-upstream-kasan-gce-smack-root | ||||
2018/09/03 10:07 | upstream | 60c1f89241d4 | a4718693 | .config | console log | report | syz | ci-upstream-kasan-gce-root | ||||
2018/09/01 03:01 | upstream | 420f51f4ab6b | a4718693 | .config | console log | report | syz | ci-upstream-kasan-gce-root | ||||
2018/08/29 04:16 | upstream | 3f16503b7d22 | b771b17e | .config | console log | report | syz | ci-upstream-kasan-gce | ||||
2018/09/20 23:41 | linux-next | a0cb0cabe4bb | 6cee973c | .config | console log | report | syz | ci-upstream-linux-next-kasan-gce-root | ||||
2018/09/01 05:19 | linux-next | a880148cb2af | a4718693 | .config | console log | report | syz | ci-upstream-linux-next-kasan-gce-root | ||||
2018/09/21 20:02 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/09/21 17:43 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce | |||||
2018/09/21 16:57 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/09/21 15:46 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2018/09/21 14:46 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-smack-root | |||||
2018/09/21 13:25 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce | |||||
2018/09/21 19:00 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-386 | |||||
2018/09/21 12:20 | upstream | 234b69e3e089 | 37079712 | .config | console log | report | ci-upstream-kasan-gce-386 | |||||
2018/09/24 05:45 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/24 04:00 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/24 02:28 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/24 01:40 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 23:33 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 22:21 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 20:27 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 19:17 | linux-next | 46c163a036b4 | 28d9ac76 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 14:41 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 13:37 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 10:13 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 08:34 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 05:36 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 04:45 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 03:27 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 02:23 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/23 01:02 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 23:34 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 22:33 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 21:18 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 20:46 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 19:15 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 17:33 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 15:25 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 14:00 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 10:54 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 08:01 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 06:13 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 05:02 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 01:14 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 01:12 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/22 00:10 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/21 22:28 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/09/21 21:27 | linux-next | 46c163a036b4 | 37079712 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | |||||
2018/08/06 12:36 | linux-next | 8c8399e0a3fb | 1beb8136 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root |