memory leak in zr364xx_start

memory leak in zr364xx_start_readpipe
Status: upstream: reported C repro on 2021/05/17 11:37
Reported-by: syzbot+af4fa391ef18efdd5f69@syzkaller.appspotmail.com
Fix commit: 0a045eac8d04 media: zr364xx: fix memory leak in zr364xx_start_readpipe
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-arm32 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 85d, last: 40d

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/05/17 18:59	16m	paskripkin@gmail.com		https://linux.googlesource.com/linux/kernel/git/torvalds/linux refs/changes/96/11196/1	OK

Sample crash report:

BUG: memory leak
unreferenced object 0xffff8881112c1600 (size 192):
  comm "kworker/1:5", pid 8088, jiffies 4294943845 (age 8.070s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 18 16 2c 11 81 88 ff ff  ..........,.....
  backtrace:
    [<ffffffff82baedf6>] kmalloc include/linux/slab.h:561 [inline]
    [<ffffffff82baedf6>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<ffffffff82f7cce8>] zr364xx_start_readpipe+0x78/0x130 drivers/media/usb/zr364xx/zr364xx.c:1022
    [<ffffffff84251dfc>] zr364xx_board_init drivers/media/usb/zr364xx/zr364xx.c:1383 [inline]
    [<ffffffff84251dfc>] zr364xx_probe+0x6a3/0x851 drivers/media/usb/zr364xx/zr364xx.c:1516
    [<ffffffff82bb6507>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff826018a9>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff82601cdb>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763
    [<ffffffff82602406>] __device_attach_driver+0xf6/0x120 drivers/base/dd.c:870
    [<ffffffff825fe797>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff82601f82>] __device_attach+0x122/0x260 drivers/base/dd.c:938
    [<ffffffff82600436>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff825fc855>] device_add+0x5d5/0xd70 drivers/base/core.c:3319
    [<ffffffff82bb3aa9>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bc3e3c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82bb5c6c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff826018a9>] really_probe+0x159/0x500 drivers/base/dd.c:576
    [<ffffffff82601cdb>] driver_probe_device+0x8b/0x100 drivers/base/dd.c:763

Crashes (2):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-gce-leak	2021/04/29 07:51	upstream	d72cd4ad4174	77e2b668	.config	log	report	syz	C		memory leak in zr364xx_start_readpipe
ci-upstream-gce-leak	2021/06/13 14:03	upstream	8ecfa36cd4db	1ba81399	.config	log	report	syz			memory leak in zr364xx_start_readpipe