syzbot


general protection fault in pick_next_task_fair (2)

Status: auto-closed as invalid on 2020/12/26 17:21
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+6eac7c477acb83f3fa7f@syzkaller.appspotmail.com
First crash: 1333d, last: 1315d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in pick_next_task_fair kernel 2 1640d 1674d 0/26 auto-closed as invalid on 2020/01/06 23:52

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 32304 Comm: syz-executor.0 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0x67/0x100 lib/list_debug.c:51
Code: 4c 89 f7 e8 db 26 10 fe 48 ba 00 01 00 00 00 00 ad de 49 8b 1e 48 39 d3 74 53 48 83 c2 22 49 39 d7 74 5d 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 aa 26 10 fe 49 8b 17 4c 39 f2 75
RSP: 0018:ffffc9000add6e78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880a4a0c2e8 RCX: dffffc0000000000
RDX: dead000000000122 RSI: ffff8880ae8358d8 RDI: ffff8880001e2570
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff131e2e6
R10: fffffbfff131e2e6 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880001e2568 R14: ffff8880001e2568 R15: 0000000000000000
FS:  00007fa66bfb8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d321000 CR3: 0000000214acc000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:132 [inline]
 list_move include/linux/list.h:215 [inline]
 pick_next_task_fair+0x553/0x970 kernel/sched/fair.c:7081
 pick_next_task kernel/sched/core.c:4344 [inline]
 __schedule+0x422/0xd20 kernel/sched/core.c:4495
 preempt_schedule_common kernel/sched/core.c:4683 [inline]
 preempt_schedule+0xc8/0x110 kernel/sched/core.c:4708
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40
 __local_bh_enable_ip+0x165/0x1c0 kernel/softirq.c:202
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 __fib6_clean_all+0x551/0x730 net/ipv6/ip6_fib.c:2248
 rt_genid_bump_ipv6 include/net/net_namespace.h:458 [inline]
 add_addr+0x1e6/0x4a0 net/ipv6/addrconf.c:3078
 sit_add_v4_addrs net/ipv6/addrconf.c:3132 [inline]
 addrconf_sit_config net/ipv6/addrconf.c:3383 [inline]
 addrconf_notify+0x216f/0x3a60 net/ipv6/addrconf.c:3576
 notifier_call_chain kernel/notifier.c:83 [inline]
 __raw_notifier_call_chain kernel/notifier.c:361 [inline]
 raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:368
 __dev_notify_flags+0x253/0x4d0 net/core/dev.c:2033
 rtnl_configure_link+0x21f/0x340 net/core/rtnetlink.c:3130
 __rtnl_newlink net/core/rtnetlink.c:3460 [inline]
 rtnl_newlink+0x15a7/0x1c10 net/core/rtnetlink.c:3500
 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5563
 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2470
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0x519/0x800 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x2b1/0x360 net/socket.c:2440
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa66bfb7c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002cf00 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000008
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffee0be82bf R14: 00007fa66bfb89c0 R15: 000000000118cf4c
Modules linked in:
---[ end trace 92002e359211cd70 ]---
RIP: 0010:__list_del_entry_valid+0x67/0x100 lib/list_debug.c:51
Code: 4c 89 f7 e8 db 26 10 fe 48 ba 00 01 00 00 00 00 ad de 49 8b 1e 48 39 d3 74 53 48 83 c2 22 49 39 d7 74 5d 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 aa 26 10 fe 49 8b 17 4c 39 f2 75
RSP: 0018:ffffc9000add6e78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880a4a0c2e8 RCX: dffffc0000000000
RDX: dead000000000122 RSI: ffff8880ae8358d8 RDI: ffff8880001e2570
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff131e2e6
R10: fffffbfff131e2e6 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880001e2568 R14: ffff8880001e2568 R15: 0000000000000000
FS:  00007fa66bfb8700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d321000 CR3: 0000000214acc000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/09/10 00:52 upstream 34d4ddd359db 409809d8 .config console log report ci-upstream-kasan-gce-smack-root
2020/09/27 17:21 upstream a1bffa48745a 5dd8aee8 .config console log report info ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.