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KASAN: alloca-out-of-bounds Read in tick_sched_handle

Status: closed as invalid on 2018/04/13 11:18
Subsystems: kernel
[Documentation on labels]
First crash: 2707d, last: 2699d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: alloca-out-of-bounds Read in tick_sched_handle (2) kernel -1 syz 7 2699d 2699d 0/29 closed as invalid on 2018/04/13 13:01
upstream KASAN: alloca-out-of-bounds Read in tick_sched_handle (3) kernel -1 syz 68 2698d 2699d 0/29 closed as invalid on 2018/05/13 12:27

Sample crash report:
==================================================================
BUG: KASAN: alloca-out-of-bounds in tick_sched_handle+0x16d/0x180 kernel/time/tick-sched.c:171
Read of size 8 at addr ffff8801d88372d0 by task syzkaller268977/4622

CPU: 0 PID: 4622 Comm: syzkaller268977 Not tainted 4.16.0+ #17
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+0x1b9/0x294 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+0xac/0x2f5 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 tick_sched_handle+0x16d/0x180 kernel/time/tick-sched.c:171
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
 __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
 hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
 </IRQ>
RIP: 0010:kasan_unpoison_shadow+0x0/0x50 mm/kasan/kasan.c:51
RSP: 0018:ffff8801d88372f8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: ffff8801d8bb2240 RBX: ffffffff85f30c20 RCX: ffffffff85ec13ef
RDX: 0000000000000000 RSI: 00000000000000d0 RDI: ffff8801d8837240
RBP: ffff8801d8837300 R08: ffff8801d8bb2240 R09: fffffbfff15db292
R10: fffffbfff15db292 R11: ffffffff8aed9497 R12: 00000000ffffffea
R13: 0000000000000000 R14: 00000000ffffffea R15: ffff8801ba25e0c0
 rcu_lock_release include/linux/rcupdate.h:251 [inline]
 rcu_read_unlock include/linux/rcupdate.h:688 [inline]
 nfnetlink_rcv_msg+0x6af/0xfe0 net/netfilter/nfnetlink.c:196
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 nfnetlink_rcv+0x1fe/0x1ba0 net/netfilter/nfnetlink.c:513
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 ___sys_sendmsg+0x805/0x940 net/socket.c:2117
 __sys_sendmsg+0x115/0x270 net/socket.c:2155
 SYSC_sendmsg net/socket.c:2164 [inline]
 SyS_sendmsg+0x29/0x30 net/socket.c:2162
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x447329
RSP: 002b:00007f6bc4d9cce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006ddc5c RCX: 0000000000447329
RDX: 0000000000000000 RSI: 0000000020498000 RDI: 00000000000003ff
RBP: 00000000006ddc58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea5a41b9f R14: 00007f6bc4d9d9c0 R15: 0000000000000005

The buggy address belongs to the page:
page:ffffea0007620dc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea0007620101 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d8837180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d8837200: 00 00 00 00 00 00 00 00 ca ca ca ca 00 00 00 00
>ffff8801d8837280: 00 00 00 00 00 00 00 00 cb cb cb cb 00 00 00 00
                                                 ^
 ffff8801d8837300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d8837380: 00 00 00 00 00 00 00 f1 f1 f1 f1 f8 f2 f2 f2 f2
==================================================================

Crashes (1144):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/12 04:53 upstream b284d4d5a678 9cd56d71 .config console log report syz C ci-upstream-kasan-gce-root
2018/04/11 01:37 upstream c18bb396d3d2 8b8de427 .config console log report syz C ci-upstream-kasan-gce
2018/04/10 16:43 upstream c18bb396d3d2 8e873e9d .config console log report syz C ci-upstream-kasan-gce-root
2018/04/05 12:19 upstream 06dd3dfeea60 5e1ccffc .config console log report syz C ci-upstream-kasan-gce-root
2018/04/05 10:11 net-next-old 17dec0a94915 5e1ccffc .config console log report syz C ci-upstream-net-kasan-gce
2018/04/12 21:17 upstream c17b0aadb7d8 eb2295de .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 12:10 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 11:25 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 10:50 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 05:26 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 02:21 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/12 02:10 upstream b284d4d5a678 9cd56d71 .config console log report syz ci-upstream-kasan-gce-root
2018/04/11 18:41 upstream b284d4d5a678 8b8de427 .config console log report syz ci-upstream-kasan-gce-root
2018/04/11 06:38 upstream c18bb396d3d2 8b8de427 .config console log report syz ci-upstream-kasan-gce-root
2018/04/10 14:22 upstream c18bb396d3d2 8e873e9d .config console log report syz ci-upstream-kasan-gce
2018/04/09 02:07 upstream 3fd14cdcc05a 77bd5117 .config console log report syz ci-upstream-kasan-gce-root
2018/04/08 16:39 upstream 3fd14cdcc05a 77bd5117 .config console log report syz ci-upstream-kasan-gce
2018/04/08 14:52 upstream 3fd14cdcc05a 77bd5117 .config console log report syz ci-upstream-kasan-gce-root
2018/04/08 04:40 upstream 3fd14cdcc05a 66f22a7f .config console log report syz ci-upstream-kasan-gce-root
2018/04/07 16:57 upstream 3fd14cdcc05a 66f22a7f .config console log report syz ci-upstream-kasan-gce
2018/04/06 12:03 upstream 38c23685b273 4f1152d4 .config console log report syz ci-upstream-kasan-gce-root
2018/04/06 11:44 upstream 38c23685b273 4f1152d4 .config console log report syz ci-upstream-kasan-gce
2018/04/06 07:32 upstream 3c8ba0d61d04 a932eae6 .config console log report syz ci-upstream-kasan-gce-root
2018/04/11 21:48 net-next-old 17dec0a94915 9cd56d71 .config console log report syz ci-upstream-net-kasan-gce
2018/04/07 20:08 net-next-old 17dec0a94915 66f22a7f .config console log report syz ci-upstream-net-kasan-gce
2018/04/12 09:47 upstream b284d4d5a678 9cd56d71 .config console log report ci-upstream-kasan-gce-root
2018/04/11 16:18 upstream b284d4d5a678 8b8de427 .config console log report ci-upstream-kasan-gce
2018/04/06 22:52 upstream 3fd14cdcc05a d613535f .config console log report ci-upstream-kasan-gce
2018/04/05 20:09 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 19:56 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 19:53 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 19:33 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 19:32 upstream e02d37bf55a9 5e1ccffc .config console log report ci-upstream-kasan-gce
2018/04/05 19:12 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 18:53 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 18:42 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 17:57 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 17:43 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 17:39 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 17:20 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 16:59 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 16:06 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 15:37 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 14:56 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 13:47 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 12:59 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 11:35 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 11:34 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 11:34 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 11:27 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/05 11:11 upstream 06dd3dfeea60 5e1ccffc .config console log report ci-upstream-kasan-gce-root
2018/04/12 17:27 net-next-old 17dec0a94915 eb2295de .config console log report ci-upstream-net-kasan-gce
2018/04/10 19:28 net-next-old 17dec0a94915 8b8de427 .config console log report ci-upstream-net-kasan-gce
2018/04/10 01:56 net-next-old 17dec0a94915 b9f65507 .config console log report ci-upstream-net-kasan-gce
2018/04/07 12:33 net-next-old 17dec0a94915 66f22a7f .config console log report ci-upstream-net-kasan-gce
2018/04/05 20:33 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 16:00 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 15:52 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 15:37 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 15:20 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 15:05 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 15:02 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 11:56 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 11:45 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 11:33 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 11:21 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 11:07 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
2018/04/05 10:13 net-next-old 17dec0a94915 5e1ccffc .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.