On Mon, Apr 29, 2019 at 8:51 AM syzbot <syzbot+58d8f704b86e4e3fb4d3@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: fdfdf867 net: phy: marvell: Fix buffer overrun with stats .. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=12be0d38a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a42d110b47dd6b36 > dashboard link: https://syzkaller.appspot.com/bug?extid=58d8f704b86e4e3fb4d3 > compiler: gcc (GCC) 9.0.0 20181231 (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+58d8f704b86e4e3fb4d3@xxxxxxxxxxxxxxxxxxxxxxxxx Eric, can this be fixed by your "ipv6: fix races in ip6_dst_destroy()"? https://patchwork.ozlabs.org/patch/1092328/ > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] PREEMPT SMP KASAN > CPU: 1 PID: 20190 Comm: syz-executor.0 Not tainted 5.1.0-rc6+ #184 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:ip6_route_get_saddr include/net/ip6_route.h:119 [inline] > RIP: 0010:ip6_dst_lookup_tail+0xf0e/0x1b30 net/ipv6/ip6_output.c:971 > Code: e6 07 e8 55 57 61 fb 48 85 db 0f 84 83 08 00 00 e8 47 57 61 fb 48 8d > 7b 7c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 > 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 07 > RSP: 0018:ffff888063406f40 EFLAGS: 00010207 > RAX: dffffc0000000000 RBX: 00c0200001ffff88 RCX: ffffc90005fe4000 > RDX: 0018040000400000 RSI: ffffffff860f35a9 RDI: 00c0200002000004 > RBP: ffff888063407098 R08: ffff888085a7c000 R09: ffffed1015d25bc8 > R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: ffff8880653b3270 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880653b3298 > FS: 00007f58b1851700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000001fc96f0 CR3: 000000006d91d000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > ip6_dst_lookup_flow+0xa8/0x220 net/ipv6/ip6_output.c:1094 > sctp_v6_get_dst+0x785/0x1d80 net/sctp/ipv6.c:293 > sctp_transport_route+0x132/0x370 net/sctp/transport.c:312 > sctp_assoc_add_peer+0x53e/0xfc0 net/sctp/associola.c:678 > sctp_process_param net/sctp/sm_make_chunk.c:2548 [inline] > sctp_process_init+0x249f/0x2b20 net/sctp/sm_make_chunk.c:2361 > sctp_sf_do_unexpected_init net/sctp/sm_statefuns.c:1556 [inline] > sctp_sf_do_unexpected_init.isra.0+0x7cd/0x1350 net/sctp/sm_statefuns.c:1456 > sctp_sf_do_5_2_1_siminit+0x35/0x40 net/sctp/sm_statefuns.c:1685 > sctp_do_sm+0x12c/0x5770 net/sctp/sm_sideeffect.c:1188 > sctp_assoc_bh_rcv+0x343/0x660 net/sctp/associola.c:1074 > sctp_inq_push+0x1ea/0x290 net/sctp/inqueue.c:95 > sctp_backlog_rcv+0x196/0xbe0 net/sctp/input.c:354 > sk_backlog_rcv include/net/sock.h:943 [inline] > __release_sock+0x12e/0x3a0 net/core/sock.c:2413 > release_sock+0x59/0x1c0 net/core/sock.c:2929 > sctp_wait_for_connect+0x316/0x540 net/sctp/socket.c:9048 > __sctp_connect+0xac2/0xce0 net/sctp/socket.c:1241 > sctp_connect net/sctp/socket.c:4858 [inline] > sctp_inet_connect+0x2a2/0x340 net/sctp/socket.c:4874 > __sys_connect+0x266/0x330 net/socket.c:1808 > __do_sys_connect net/socket.c:1819 [inline] > __se_sys_connect net/socket.c:1816 [inline] > __x64_sys_connect+0x73/0xb0 net/socket.c:1816 > do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x458da9 > Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f58b1850c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9 > RDX: 000000000000001c RSI: 0000000020000200 RDI: 0000000000000003 > RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f58b18516d4 > R13: 00000000004bf1f1 R14: 00000000004d02c0 R15: 00000000ffffffff > Modules linked in: > ---[ end trace 04c26bfcf25dca59 ]--- > RIP: 0010:ip6_route_get_saddr include/net/ip6_route.h:119 [inline] > RIP: 0010:ip6_dst_lookup_tail+0xf0e/0x1b30 net/ipv6/ip6_output.c:971 > Code: e6 07 e8 55 57 61 fb 48 85 db 0f 84 83 08 00 00 e8 47 57 61 fb 48 8d > 7b 7c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 > 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 07 > RSP: 0018:ffff888063406f40 EFLAGS: 00010207 > RAX: dffffc0000000000 RBX: 00c0200001ffff88 RCX: ffffc90005fe4000 > RDX: 0018040000400000 RSI: ffffffff860f35a9 RDI: 00c0200002000004 > RBP: ffff888063407098 R08: ffff888085a7c000 R09: ffffed1015d25bc8 > R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: ffff8880653b3270 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880653b3298 > FS: 00007f58b1851700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000070c09b CR3: 000000006d91d000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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 syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status 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+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000006b30f30587a5b569%40google.com. > For more options, visit https://groups.google.com/d/optout.
