On Wed, Sep 26, 2018 at 9:49 AM syzbot <syzbot+942a1909765f04133...@syzkaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 739d0def85ca Merge branch 'hv_netvsc-Support-LRO-RSC-in-th.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=13aa179e400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=e79b9299baeb2298 > dashboard link: https://syzkaller.appspot.com/bug?extid=942a1909765f0413329b > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+942a1909765f04133...@syzkaller.appspotmail.com > > ================================================================== > BUG: KASAN: slab-out-of-bounds in sg_mark_end > include/linux/scatterlist.h:195 [inline] > BUG: KASAN: slab-out-of-bounds in tls_push_record+0x1243/0x1330 > net/tls/tls_sw.c:521 > Read of size 8 at addr ffff8801a4d235f8 by task syz-executor1/7668
This is probably: #syz dup: KASAN: out-of-bounds Write in tls_push_record > CPU: 1 PID: 7668 Comm: syz-executor1 Not tainted 4.19.0-rc4+ #228 > 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+0x1c4/0x2b4 lib/dump_stack.c:113 > print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 > kasan_report_error mm/kasan/report.c:354 [inline] > kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 > __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 > sg_mark_end include/linux/scatterlist.h:195 [inline] > tls_push_record+0x1243/0x1330 net/tls/tls_sw.c:521 > tls_sw_push_pending_record+0x22/0x30 net/tls/tls_sw.c:558 > tls_handle_open_record net/tls/tls_main.c:155 [inline] > tls_sk_proto_close+0x439/0x750 net/tls/tls_main.c:272 > inet_release+0x104/0x1f0 net/ipv4/af_inet.c:428 > inet6_release+0x50/0x70 net/ipv6/af_inet6.c:458 > __sock_release+0xd7/0x250 net/socket.c:579 > sock_close+0x19/0x20 net/socket.c:1141 > __fput+0x385/0xa30 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 > RIP: 0033:0x411151 > Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 19 00 00 c3 48 > 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 > 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 > RSP: 002b:00007fff8ba9e200 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 > RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411151 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 > R10: 00007fff8ba9e130 R11: 0000000000000293 R12: 000000000000000f > R13: 0000000000086e3d R14: 0000000000000412 R15: badc0ffeebadface > > Allocated by task 0: > (stack is not available) > > Freed by task 0: > (stack is not available) > > The buggy address belongs to the object at ffff8801a4d22d80 > which belongs to the cache kmalloc-2048 of size 2048 > The buggy address is located 120 bytes to the right of > 2048-byte region [ffff8801a4d22d80, ffff8801a4d23580) > The buggy address belongs to the page: > page:ffffea0006934880 count:1 mapcount:0 mapping:ffff8801da800c40 index:0x0 > compound_mapcount: 0 > flags: 0x2fffc0000008100(slab|head) > raw: 02fffc0000008100 ffffea000717fd08 ffff8801da801948 ffff8801da800c40 > raw: 0000000000000000 ffff8801a4d22500 0000000100000003 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8801a4d23480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8801a4d23500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > > ffff8801a4d23580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ^ > ffff8801a4d23600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8801a4d23680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ================================================================== > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/000000000000ccb25d0576c17446%40google.com. > For more options, visit https://groups.google.com/d/optout.
