syzbot


upstream test error: WARNING in __local_bh_enable_ip

Status: auto-closed as invalid on 2020/09/09 20:06
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+8db9e1ecde74e590a657@syzkaller.appspotmail.com
First crash: 1350d, last: 1350d
Discussions (3)
Title Replies (including bot) Last reply
[PATCH] kcsan: Treat runtime as NMI-like with interrupt tracing 8 (8) 2020/08/17 07:10
[PATCH] x86/paravirt: Add missing noinstr to arch_local*() helpers 34 (34) 2020/08/12 08:57
upstream test error: WARNING in __local_bh_enable_ip 0 (1) 2020/08/05 07:19

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8725 at kernel/softirq.c:175 __local_bh_enable_ip+0xdf/0x100 kernel/softirq.c:175
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8725 Comm: syz-fuzzer Not tainted 5.8.0-syzkaller #0
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+0x16e/0x25d lib/dump_stack.c:118
 panic+0x20c/0x69a kernel/panic.c:231
 __warn+0x211/0x240 kernel/panic.c:600
 report_bug+0x153/0x1d0 lib/bug.c:198
 handle_bug+0x4d/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x16/0x70 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:__local_bh_enable_ip+0xdf/0x100 kernel/softirq.c:175
Code: 00 00 65 8b 05 ae cd cf 7e 85 c0 75 05 e8 10 ae ce ff 5b 41 5e c3 0f 0b 83 3d 00 f9 2f 07 00 0f 85 49 ff ff ff e9 53 ff ff ff <0f> 0b e9 4c ff ff ff e8 15 00 00 00 eb aa 0f 0b 0f 0b 0f 1f 44 00
RSP: 0018:ffffc90000de7cc8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88811e73c000
RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff811bf3f5
RBP: 0000000000000000 R08: 0000000000000000 R09: 000088811e73d5c3
R10: 0000ffffffffffff R11: 0000000000000000 R12: 000000c000061c80
R13: ffff88811e73c000 R14: ffffffff811bf3f5 R15: 0000000000000000
 local_bh_enable+0x1b/0x20 include/linux/bottom_half.h:32
 fpregs_unlock arch/x86/include/asm/fpu/api.h:41 [inline]
 __fpu__restore_sig+0x371/0x900 arch/x86/kernel/fpu/signal.c:368
 fpu__restore_sig+0x51/0x80 arch/x86/kernel/fpu/signal.c:490
 restore_sigcontext+0x171/0x1c0 arch/x86/kernel/signal.c:139
 __do_sys_rt_sigreturn+0x91/0xf0 arch/x86/kernel/signal.c:653
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x467f53
Code: 00 48 81 eb 00 01 00 00 48 81 c7 00 01 00 00 48 81 fb 00 01 00 00 73 82 e9 07 ff ff ff c5 fd ef c0 48 81 fb 00 00 00 02 73 46 <c5> fe 7f 07 c5 fe 7f 47 20 c5 fe 7f 47 40 c5 fe 7f 47 60 48 81 eb
RSP: 002b:000000c000049ed8 EFLAGS: 00010287
RAX: 0000000000000000 RBX: 0000000000080000 RCX: 0000000000000000
RDX: 00007f1ae6c61000 RSI: 0000000000080000 RDI: 00007f1ae6be1000
RBP: 000000c000049f50 R08: 0000000001000000 R09: 00007f1ae6d3efff
R10: 00007f1ae69bbd40 R11: 000000000000121f R12: 00000000000007ff
R13: 0000000000000012 R14: 000080c001440000 R15: 000080c00243ffff
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
2020/08/05 20:05 upstream 585524081ecd b7129355 .config console log report ci2-upstream-kcsan-gce
2020/08/05 19:14 upstream 060a72a26857 b7129355 .config console log report ci2-upstream-kcsan-gce
2020/08/05 09:34 upstream 2324d50d051e b7129355 .config console log report ci2-upstream-kcsan-gce
2020/08/05 06:30 upstream 2324d50d051e 02034dac .config console log report ci2-upstream-kcsan-gce
2020/08/05 01:50 upstream 442489c21923 02034dac .config console log report ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.