syzbot


WARNING in static_key_disable_cpuslocked

Status: fixed on 2019/01/11 01:22
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+6cffdef928852907751c@syzkaller.appspotmail.com
Fix commit: 9c48060141bd udp: fix jump label misuse
First crash: 2046d, last: 2023d
Discussions (1)
Title Replies (including bot) Last reply
WARNING in static_key_disable_cpuslocked 3 (4) 2018/11/17 17:08

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
hrtimer: interrupt took 32101 ns
WARNING: CPU: 0 PID: 7564 at kernel/jump_label.c:188 static_key_disable_cpuslocked+0x2bb/0x310 kernel/jump_label.c:188
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7564 Comm: syz-executor2 Not tainted 4.20.0-rc1-next-20181109+ #110
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:static_key_disable_cpuslocked+0x2bb/0x310 kernel/jump_label.c:188
Code: ff eb db e8 07 da e3 ff 48 89 da 48 c7 c6 00 bf 31 88 48 c7 c7 e0 bb 31 88 e8 71 0d ad ff 0f 0b e9 0e fe ff ff e8 e5 d9 e3 ff <0f> 0b e9 2b ff ff ff 4c 89 f7 e8 56 32 27 00 e9 5e fe ff ff 48 89
RSP: 0018:ffff8801ba2b7928 EFLAGS: 00010293
RAX: ffff8801bb558340 RBX: 00000000ffffffff RCX: ffffffff819bcdf5
RDX: 0000000000000000 RSI: ffffffff819bcecb RDI: 0000000000000005
RBP: ffff8801ba2b79f0 R08: ffff8801bb558340 R09: fffffbfff17885c4
R10: fffffbfff17885c4 R11: ffffffff8bc42e23 R12: 1ffff10037456f25
R13: 1ffff10037456f31 R14: dffffc0000000000 R15: ffff8801ba2b79c8
 static_key_disable+0x1a/0x30 kernel/jump_label.c:202
 udpv6_destroy_sock+0x1e3/0x220 net/ipv6/udp.c:1492
 sk_common_release+0x6d/0x320 net/core/sock.c:3001
 udp_lib_close+0x15/0x20 include/net/udp.h:206
 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:580
 sock_close+0x19/0x20 net/socket.c:1142
 __fput+0x3bc/0xa70 fs/file_table.c:279
 ____fput+0x15/0x20 fs/file_table.c:312
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [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: 0033:0x411021
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:00007ffeb03ec0a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411021
RDX: 0000000000000001 RSI: 0000000000731ce8 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffeb03ebfd0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000002
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/11/13 11:47 linux-next 442b8cea2477 5f5f6d14 .config console log report syz ci-upstream-linux-next-kasan-gce-root
2018/12/05 23:28 linux-next 442b8cea2477 764b42c4 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/03 23:27 linux-next 442b8cea2477 03f94a45 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/12/02 11:28 linux-next 442b8cea2477 e0d8c853 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/11/13 08:55 linux-next 442b8cea2477 5f5f6d14 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.