From: syzbot <syzbot+a41b73dce23962a74c72@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-usb@vger.kernel.org, ssranevjti@gmail.com,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [media?] [usb?] memory leak in v4l2_ctrl_handler_init_class (2)
Date: Tue, 25 Nov 2025 12:38:02 -0800 [thread overview]
Message-ID: <692613aa.a70a0220.d98e3.00bd.GAE@google.com> (raw)
In-Reply-To: <c0152541-a1ff-4eb4-afdd-5335150f29ba@gmail.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in v4l2_ctrl_handler_init_class
BUG: memory leak
unreferenced object 0xffff88812b84cfc0 (size 8):
comm "kworker/0:7", pid 6710, jiffies 4294946048
hex dump (first 8 bytes):
40 fc ec 19 81 88 ff ff @.......
backtrace (crc 82d035d3):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kvmalloc_node_noprof+0x51c/0x820 mm/slub.c:7112
kvmalloc_array_node_noprof include/linux/slab.h:1122 [inline]
v4l2_ctrl_handler_init_class+0x67/0x90 drivers/media/v4l2-core/v4l2-ctrls-core.c:1625
usb_keene_probe+0xc4/0x450 drivers/media/radio/radio-keene.c:326
usb_probe_interface+0x173/0x3f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
__driver_probe_device+0xc3/0x1a0 drivers/base/dd.c:801
driver_probe_device+0x2a/0x120 drivers/base/dd.c:831
__device_attach_driver+0x10f/0x170 drivers/base/dd.c:959
bus_for_each_drv+0xcf/0x120 drivers/base/bus.c:462
__device_attach+0xf9/0x290 drivers/base/dd.c:1031
bus_probe_device+0xcd/0xe0 drivers/base/bus.c:537
device_add+0x983/0xc80 drivers/base/core.c:3689
usb_set_configuration+0x961/0xc70 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x83/0xd0 drivers/usb/core/generic.c:250
usb_probe_device+0x7c/0x1d0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
BUG: memory leak
unreferenced object 0xffff888119edee00 (size 256):
comm "kworker/0:7", pid 6710, jiffies 4294946048
hex dump (first 32 bytes):
00 a0 ef 19 81 88 ff ff 00 ef ed 19 81 88 ff ff ................
10 ee ed 19 81 88 ff ff 10 ee ed 19 81 88 ff ff ................
backtrace (crc 3c002570):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kvmalloc_node_noprof+0x51c/0x820 mm/slub.c:7112
v4l2_ctrl_new+0x2bf/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2031
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
usb_keene_probe+0xe8/0x450 drivers/media/radio/radio-keene.c:327
usb_probe_interface+0x173/0x3f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
__driver_probe_device+0xc3/0x1a0 drivers/base/dd.c:801
driver_probe_device+0x2a/0x120 drivers/base/dd.c:831
__device_attach_driver+0x10f/0x170 drivers/base/dd.c:959
bus_for_each_drv+0xcf/0x120 drivers/base/bus.c:462
__device_attach+0xf9/0x290 drivers/base/dd.c:1031
bus_probe_device+0xcd/0xe0 drivers/base/bus.c:537
device_add+0x983/0xc80 drivers/base/core.c:3689
usb_set_configuration+0x961/0xc70 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x83/0xd0 drivers/usb/core/generic.c:250
usb_probe_device+0x7c/0x1d0 drivers/usb/core/driver.c:291
BUG: memory leak
unreferenced object 0xffff888119edef00 (size 256):
comm "kworker/0:7", pid 6710, jiffies 4294946048
hex dump (first 32 bytes):
00 ee ed 19 81 88 ff ff 30 fd 58 26 81 88 ff ff ........0.X&....
10 ef ed 19 81 88 ff ff 10 ef ed 19 81 88 ff ff ................
backtrace (crc 61944fdf):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kvmalloc_node_noprof+0x51c/0x820 mm/slub.c:7112
v4l2_ctrl_new+0x2bf/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2031
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
handler_new_ref+0x352/0x450 drivers/media/v4l2-core/v4l2-ctrls-core.c:1772
v4l2_ctrl_new+0x67d/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2114
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
usb_keene_probe+0xe8/0x450 drivers/media/radio/radio-keene.c:327
usb_probe_interface+0x173/0x3f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
__driver_probe_device+0xc3/0x1a0 drivers/base/dd.c:801
driver_probe_device+0x2a/0x120 drivers/base/dd.c:831
__device_attach_driver+0x10f/0x170 drivers/base/dd.c:959
bus_for_each_drv+0xcf/0x120 drivers/base/bus.c:462
__device_attach+0xf9/0x290 drivers/base/dd.c:1031
bus_probe_device+0xcd/0xe0 drivers/base/bus.c:537
device_add+0x983/0xc80 drivers/base/core.c:3689
BUG: memory leak
unreferenced object 0xffff888119ecfb40 (size 64):
comm "kworker/0:7", pid 6710, jiffies 4294946048
hex dump (first 32 bytes):
80 fb ec 19 81 88 ff ff 40 fd 58 26 81 88 ff ff ........@.X&....
00 00 00 00 00 00 00 00 00 ef ed 19 81 88 ff ff ................
backtrace (crc 96c5954f):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5662
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
handler_new_ref+0xd7/0x450 drivers/media/v4l2-core/v4l2-ctrls-core.c:1780
v4l2_ctrl_new+0x67d/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2114
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
handler_new_ref+0x352/0x450 drivers/media/v4l2-core/v4l2-ctrls-core.c:1772
v4l2_ctrl_new+0x67d/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2114
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
usb_keene_probe+0xe8/0x450 drivers/media/radio/radio-keene.c:327
usb_probe_interface+0x173/0x3f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
__driver_probe_device+0xc3/0x1a0 drivers/base/dd.c:801
driver_probe_device+0x2a/0x120 drivers/base/dd.c:831
__device_attach_driver+0x10f/0x170 drivers/base/dd.c:959
bus_for_each_drv+0xcf/0x120 drivers/base/bus.c:462
__device_attach+0xf9/0x290 drivers/base/dd.c:1031
bus_probe_device+0xcd/0xe0 drivers/base/bus.c:537
BUG: memory leak
unreferenced object 0xffff888119ecfb80 (size 64):
comm "kworker/0:7", pid 6710, jiffies 4294946048
hex dump (first 32 bytes):
00 fb ec 19 81 88 ff ff 40 fb ec 19 81 88 ff ff ........@.......
40 fb ec 19 81 88 ff ff 00 ee ed 19 81 88 ff ff @...............
backtrace (crc ef37c6b5):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kmalloc_noprof+0x3e3/0x6b0 mm/slub.c:5662
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
handler_new_ref+0xd7/0x450 drivers/media/v4l2-core/v4l2-ctrls-core.c:1780
v4l2_ctrl_new+0x67d/0x1340 drivers/media/v4l2-core/v4l2-ctrls-core.c:2114
v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2185
usb_keene_probe+0xe8/0x450 drivers/media/radio/radio-keene.c:327
usb_probe_interface+0x173/0x3f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x12f/0x430 drivers/base/dd.c:659
__driver_probe_device+0xc3/0x1a0 drivers/base/dd.c:801
driver_probe_device+0x2a/0x120 drivers/base/dd.c:831
__device_attach_driver+0x10f/0x170 drivers/base/dd.c:959
bus_for_each_drv+0xcf/0x120 drivers/base/bus.c:462
__device_attach+0xf9/0x290 drivers/base/dd.c:1031
bus_probe_device+0xcd/0xe0 drivers/base/bus.c:537
device_add+0x983/0xc80 drivers/base/core.c:3689
usb_set_configuration+0x961/0xc70 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x83/0xd0 drivers/usb/core/generic.c:250
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: 30f09200 Merge tag 'arm64-fixes' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17c4f8b4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f30cc590c4f6da44
dashboard link: https://syzkaller.appspot.com/bug?extid=a41b73dce23962a74c72
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
Note: no patches were applied.
next prev parent reply other threads:[~2025-11-25 20:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-25 7:55 [syzbot] [media?] [usb?] memory leak in v4l2_ctrl_handler_init_class (2) syzbot
2025-11-25 17:01 ` shaurya
2025-11-25 20:38 ` syzbot [this message]
2025-11-25 17:03 ` shaurya
2025-11-25 21:09 ` syzbot
2025-11-25 20:21 ` shaurya
2025-11-25 21:29 ` syzbot
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