ci2 starts bisection 2023-06-07 23:12:11.139636857 +0000 UTC m=+21003.377278356
bisecting fixing commit since ca48fc16c49388400eddd6c6614593ebf7c7726a
building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb
ensuring issue is reproducible on original commit ca48fc16c49388400eddd6c6614593ebf7c7726a

testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 6e6e7abbc3bd3fe9d49932541bc30df99abaf3a2852a2e01c4a63ea58e730876
all runs: crashed: WARNING in media_create_pad_link
testing current HEAD 76ba310227d2490018c271f1ecabb6c0a3212eb0
testing commit 76ba310227d2490018c271f1ecabb6c0a3212eb0 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: c7b840a4764d8b7b12b7dcba56cd23904b15200bba8a2465da6b6ee41cf5d43a
all runs: crashed: WARNING in media_create_pad_link
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 33m51.360646886s (build: 26m52.150405309s, test: 6m36.178599511s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 6.1.32
crash: WARNING in media_create_pad_link
usb 1-1: New USB device found, idVendor=0bd3, idProduct=0d55, bcdDevice=69.6a
usb 1-1: New USB device strings: Mfr=64, Product=0, SerialNumber=0
usb 1-1: Manufacturer: syz
usb 1-1: config 0 descriptor??
usb 1-1: Found UVC 0.00 device <unnamed> (0bd3:0d55)
uvcvideo 1-1:0.0: Entity type for entity Output 255 was not initialized!
------------[ cut here ]------------
WARNING: CPU: 0 PID: 14 at drivers/media/mc/mc-entity.c:1021 media_create_pad_link+0x8b1/0x9f0
Modules linked in:
CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 6.1.32-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_create_pad_link+0x8b1/0x9f0 drivers/media/mc/mc-entity.c:1021
Code: 7c 24 18 48 89 ee e8 5e 01 00 00 b9 f4 ff ff ff 89 c8 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b b9 ea ff ff ff eb e6 <0f> 0b b9 ea ff ff ff eb dd 0f 0b b9 ea ff ff ff eb d4 0f 0b b9 ea
RSP: 0018:ffffc90000136a60 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88807b7d28b8 RCX: 0000000000000000
RDX: ffff8880203c2880 RSI: 0000000000000000 RDI: ffff88807b7d2880
RBP: 0000000000000000 R08: 0000000000000003 R09: ffffed1002cdae98
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880203c2880
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88807b7d2880
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb100064ba8 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x5c0/0x790 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains+0x38b/0x440 drivers/media/usb/uvc/uvc_driver.c:2034
 uvc_probe+0x95ad/0x9e10 drivers/media/usb/uvc/uvc_driver.c:2171
 usb_probe_interface+0x49b/0x9a0 drivers/usb/core/driver.c:396
 really_probe+0x259/0xa30 drivers/base/dd.c:639
 __driver_probe_device+0x138/0x340 drivers/base/dd.c:783
 driver_probe_device+0x4b/0x3a0 drivers/base/dd.c:813
 __device_attach_driver+0x2c9/0x3e0 drivers/base/dd.c:941
 bus_for_each_drv+0x152/0x1b0 drivers/base/bus.c:427
 __device_attach+0x2bd/0x4b0 drivers/base/dd.c:1013
 bus_probe_device+0x82/0x190 drivers/base/bus.c:487
 device_add+0x7d1/0xde0 drivers/base/core.c:3664
 usb_set_configuration+0x17e7/0x1df0 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x61/0xf0 drivers/usb/core/generic.c:238
 usb_probe_device+0xc3/0x1e0 drivers/usb/core/driver.c:293
 really_probe+0x259/0xa30 drivers/base/dd.c:639
 __driver_probe_device+0x138/0x340 drivers/base/dd.c:783
 driver_probe_device+0x4b/0x3a0 drivers/base/dd.c:813
 __device_attach_driver+0x2c9/0x3e0 drivers/base/dd.c:941
 bus_for_each_drv+0x152/0x1b0 drivers/base/bus.c:427
 __device_attach+0x2bd/0x4b0 drivers/base/dd.c:1013
 bus_probe_device+0x82/0x190 drivers/base/bus.c:487
 device_add+0x7d1/0xde0 drivers/base/core.c:3664
 usb_new_device+0xbf6/0x1820 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5355 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5499 [inline]
 port_event drivers/usb/core/hub.c:5655 [inline]
 hub_event+0x24e8/0x4910 drivers/usb/core/hub.c:5737
 process_one_work+0x7be/0xf30 kernel/workqueue.c:2289
 worker_thread+0x8c5/0xfc0 kernel/workqueue.c:2436
 kthread+0x230/0x2b0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>