ci2 starts bisection 2023-06-07 18:03:42.029948957 +0000 UTC m=+2494.267590466
bisecting fixing commit since 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95
building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb
ensuring issue is reproducible on original commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95

testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 79266f889b7e660e7b64fc7fda120c6bc9093d29b99a37ef3c387247b668db12
all runs: crashed: WARNING in media_create_pad_link
testing current HEAD d7af3e5ba454d007b4939f858739cf1cecdeab46
testing commit d7af3e5ba454d007b4939f858739cf1cecdeab46 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: e332a55b4efe5e081c68703f7250b6c563230834bd06cf6a5a8b3b76ded506a2
all runs: crashed: WARNING in media_create_pad_link
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 27m46.155818245s (build: 21m1.483874331s, test: 6m19.444493358s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 5.15.115
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: 1 PID: 1070 at drivers/media/mc/mc-entity.c:667 media_create_pad_link+0x461/0x6b0 drivers/media/mc/mc-entity.c:713
Modules linked in:
CPU: 1 PID: 1070 Comm: kworker/1:2 Not tainted 5.15.115-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+0x461/0x6b0 drivers/media/mc/mc-entity.c:667
Code: 45 3a 01 31 c0 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b 48 83 c4 20 b8 ea ff ff ff 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b b8 ea ff ff ff eb d2 0f 0b b8 ea ff ff ff eb c9 0f 0b b8 ea
RSP: 0018:ffffc9000523ef18 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888021922880 RCX: 0000000000000000
RDX: 1ffff1100f0a7e17 RSI: 0000000000000000 RDI: ffff88807853f0b8
RBP: ffff88807853f080 R08: 0000000000000003 R09: ffff88807846a4bb
R10: ffffed100f08d497 R11: 000000000007e084 R12: 1ffff1100432453f
R13: ffff888021922880 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557bbc257950 CR3: 0000000022a33000 CR4: 00000000003506e0
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+0x443/0x7e0 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains drivers/media/usb/uvc/uvc_driver.c:2300 [inline]
 uvc_probe.cold+0x2727/0x2ebe drivers/media/usb/uvc/uvc_driver.c:2437
 usb_probe_interface+0x274/0x6a0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:516 [inline]
 really_probe+0x1c2/0xb60 drivers/base/dd.c:595
 __driver_probe_device+0x27f/0x3e0 drivers/base/dd.c:755
 driver_probe_device+0x44/0x110 drivers/base/dd.c:785
 __device_attach_driver+0x14a/0x270 drivers/base/dd.c:907
 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
 __device_attach+0x19e/0x440 drivers/base/dd.c:979
 bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
 device_add+0x9bb/0x1b30 drivers/base/core.c:3394
 usb_set_configuration+0xa33/0x17e0 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x74/0xa0 drivers/usb/core/generic.c:238
 usb_probe_device+0x95/0x240 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:516 [inline]
 really_probe+0x1c2/0xb60 drivers/base/dd.c:595
 __driver_probe_device+0x27f/0x3e0 drivers/base/dd.c:755
 driver_probe_device+0x44/0x110 drivers/base/dd.c:785
 __device_attach_driver+0x14a/0x270 drivers/base/dd.c:907
 bus_for_each_drv+0x11e/0x1a0 drivers/base/bus.c:427
 __device_attach+0x19e/0x440 drivers/base/dd.c:979
 bus_probe_device+0x19d/0x250 drivers/base/bus.c:487
 device_add+0x9bb/0x1b30 drivers/base/core.c:3394
 usb_new_device.cold+0x585/0xe70 drivers/usb/core/hub.c:2568
 hub_port_connect drivers/usb/core/hub.c:5358 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 port_event drivers/usb/core/hub.c:5648 [inline]
 hub_event+0x111f/0x3830 drivers/usb/core/hub.c:5730
 process_one_work+0x85b/0x1360 kernel/workqueue.c:2307
 worker_thread+0x5a6/0xf90 kernel/workqueue.c:2454
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>