syzbot


upstream test error: WARNING in ep_scan_ready_list

Status: auto-closed as invalid on 2020/09/09 09:34
Reported-by: syzbot+d99fcdc44745d2f54a57@syzkaller.appspotmail.com
First crash: 781d, last: 781d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5067 at fs/eventpoll.c:688 ep_scan_ready_list+0x9f/0x470 fs/eventpoll.c:688
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 5067 Comm: systemd-journal 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:ep_scan_ready_list+0x9f/0x470 fs/eventpoll.c:688
Code: d7 cf c6 ff 85 db 74 1d e8 be cb c6 ff 40 84 ed 75 0c eb 1d e8 b2 cb c6 ff 40 84 ed 74 13 e8 a8 cb c6 ff eb 1c e8 a1 cb c6 ff <0f> 0b 40 84 ed 75 ed e8 95 cb c6 ff 4c 89 f7 44 89 fe e8 ea f8 a3
RSP: 0018:ffffc90000e23dd0 EFLAGS: 00010293
RAX: ffffffff81854ecf RBX: 0000000000000000 RCX: ffff88812565e540
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81854ea9 R09: 0000ffff88619eb7
R10: 0000ffffffffffff R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90000e23df0 R14: ffff8881242eec00 R15: 0000000000000000
 ep_send_events fs/eventpoll.c:1788 [inline]
 ep_poll fs/eventpoll.c:1944 [inline]
 do_epoll_wait+0x55c/0x920 fs/eventpoll.c:2333
 __do_sys_epoll_wait fs/eventpoll.c:2343 [inline]
 __se_sys_epoll_wait fs/eventpoll.c:2340 [inline]
 __x64_sys_epoll_wait+0x4d/0x60 fs/eventpoll.c:2340
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7faf859782e3
Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24
RSP: 002b:00007ffdf772ef08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8
RAX: ffffffffffffffda RBX: 000055b9e29831e0 RCX: 00007faf859782e3
RDX: 0000000000000013 RSI: 00007ffdf772ef10 RDI: 0000000000000008
RBP: 00007ffdf772f100 R08: 00000014c066fa40 R09: 00007ffdf779b080
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdf772ef10
R13: 0000000000000001 R14: ffffffffffffffff R15: 0005ac1e11a3412d
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-kcsan-gce 2020/08/05 09:34 upstream 2324d50d051e b7129355 .config log report
ci2-upstream-kcsan-gce 2020/08/04 22:52 upstream 3950e975431b 02034dac .config log report
* Struck through repros no longer work on HEAD.