bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a
building syzkaller on 816e0689d7d9d8321f8bf360740f0e516aee15ca
testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a with gcc (GCC) 8.4.1 20210217
kernel signature: d708975816f01793082efe16dc3687b4765f73f67acfe9ee971b4503b3152d7c
run #0: crashed: WARNING: ODEBUG bug in netdev_freemem
run #1: crashed: WARNING: ODEBUG bug in bt_host_release
run #2: crashed: WARNING: ODEBUG bug in bt_host_release
run #3: crashed: INFO: task hung in hci_req_sync
run #4: crashed: WARNING: Unsupported flag value(s) of 0x%x in DT_FLAGS_1.
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
reproducer seems to be flaky
testing current HEAD 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79
testing commit 3242aa3a635c0958671ee1e4b0958dcc7c4e5c79 with gcc (GCC) 8.4.1 20210217
kernel signature: 473da0f74e386344e44be1e13f5765c221a70e637277b704ad1b4a4d7fd80d4e
run #0: crashed: WARNING: ODEBUG bug in bt_host_release
run #1: crashed: WARNING: ODEBUG bug in bt_host_release
run #2: crashed: INFO: task hung in hci_req_sync
run #3: crashed: WARNING: ODEBUG bug in bt_host_release
run #4: crashed: WARNING: ODEBUG bug in bt_host_release
run #5: crashed: general protection fault in __queue_work
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
Reproducer flagged being flaky
revisions tested: 2, total time: 42m30.341979182s (build: 18m1.771163463s, test: 23m18.173502626s)
the crash still happens on HEAD
commit msg: Linux 4.14.222
crash: general protection fault in __queue_work
Bluetooth: hci1 command 0x0401 tx timeout
Bluetooth: hci1 command 0x0401 tx timeout
Bluetooth: hci1 command 0x0401 tx timeout
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
Modules linked in:
CPU: 1 PID: 31697 Comm: syz-executor.3 Not tainted 4.14.222-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88810f9ac400 task.stack: ffff8881696d8000
RIP: 0010:__queue_work+0x128/0xea0 kernel/workqueue.c:1406
RSP: 0018:ffff8881696df858 EFLAGS: 00010046
RAX: ffff8881f248d1c0 RBX: 0000000000000001 RCX: ffff8881f5c00068
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffff8881696df8d0 R08: ffffffff87f55600 R09: ffffffff87f55608
R10: 0000000000000000 R11: 0000000000000040 R12: 0000000000000000
R13: ffff8881b4678780 R14: 0000000000000040 R15: dffffc0000000000
FS:  00007fbf26478700(0000) GS:ffff8881f6700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66baefe740 CR3: 00000001c09bd001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 queue_work_on+0x140/0x180 kernel/workqueue.c:1490
 queue_work include/linux/workqueue.h:491 [inline]
 req_run+0x2b2/0x590 net/bluetooth/hci_request.c:77
 hci_req_run_skb net/bluetooth/hci_request.c:89 [inline]
 __hci_req_sync+0x297/0x7d0 net/bluetooth/hci_request.c:214
 hci_req_sync+0x70/0xb0 net/bluetooth/hci_request.c:285
 hci_inquiry+0x580/0x790 net/bluetooth/hci_core.c:1272
 hci_sock_ioctl+0x199/0x600 net/bluetooth/hci_sock.c:1043
 sock_do_ioctl+0x62/0xa0 net/socket.c:974
 sock_ioctl+0x251/0x430 net/socket.c:1071
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465109
RSP: 002b:00007fbf26478188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000055cf00 RCX: 0000000000465109
RDX: 0000000020000200 RSI: 00000000800448f0 RDI: 0000000000000004
RBP: 00000000004af711 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055cf00
R13: 00007ffea8c1297f R14: 00007fbf26478300 R15: 0000000000022000
Code: e8 6e a1 ef ff 4c 89 ef 89 c6 e8 c4 76 ff ff 48 8b 7d d0 49 89 c4 e8 78 df ff ff 48 85 c0 0f 84 d5 02 00 00 4c 89 e2 48 c1 ea 03 <42> 80 3c 3a 00 0f 85 4b 0c 00 00 49 39 04 24 0f 85 84 04 00 00 
RIP: __queue_work+0x128/0xea0 kernel/workqueue.c:1406 RSP: ffff8881696df858
---[ end trace 481ed56571203370 ]---