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006d021491bc7-69998c8f08emr6569595eaf.1.1778210642580; Thu, 07 May 2026 20:24:02 -0700 (PDT) Date: Thu, 07 May 2026 20:24:02 -0700 In-Reply-To: <20260508025546.167667-1-daiky0325@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69fd5752.a00a0220.a7d34.0003.GAE@google.com> Subject: Re: [syzbot] [media?] [usb?] memory leak in v4l2_ctrl_handler_init_class (3) From: syzbot To: daiky0325@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" 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 0xffff888127f5d7b8 (size 8): comm "kworker/1:1", pid 41, jiffies 4294945272 hex dump (first 8 bytes): 00 38 e7 10 81 88 ff ff .8...... backtrace (crc f4c8de14): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kvmalloc_node_noprof+0x537/0x760 mm/slub.c:6832 v4l2_ctrl_handler_init_class+0x59/0x90 drivers/media/v4l2-core/v4l2-ctrls-core.c:1728 msi2500_probe+0x2a9/0x390 drivers/media/usb/msi2500/msi2500.c:1248 usb_probe_interface+0x22a/0x4e0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:631 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:709 __driver_probe_device+0xe8/0x1a0 drivers/base/dd.c:871 driver_probe_device+0x2a/0x120 drivers/base/dd.c:901 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1029 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1101 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1156 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:613 device_add+0x99b/0xc70 drivers/base/core.c:3706 usb_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250 usb_probe_device+0x78/0x1f0 drivers/usb/core/driver.c:291 BUG: memory leak unreferenced object 0xffff888127f5d6f8 (size 8): comm "kworker/1:3", pid 5345, jiffies 4294945276 hex dump (first 8 bytes): 40 3d 2a 2a 81 88 ff ff @=**.... backtrace (crc c98a9e13): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kvmalloc_node_noprof+0x537/0x760 mm/slub.c:6832 v4l2_ctrl_handler_init_class+0x59/0x90 drivers/media/v4l2-core/v4l2-ctrls-core.c:1728 msi2500_probe+0x2a9/0x390 drivers/media/usb/msi2500/msi2500.c:1248 usb_probe_interface+0x22a/0x4e0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:631 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:709 __driver_probe_device+0xe8/0x1a0 drivers/base/dd.c:871 driver_probe_device+0x2a/0x120 drivers/base/dd.c:901 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1029 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1101 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1156 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:613 device_add+0x99b/0xc70 drivers/base/core.c:3706 usb_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250 usb_probe_device+0x78/0x1f0 drivers/usb/core/driver.c:291 BUG: memory leak unreferenced object 0xffff8881281a5300 (size 256): comm "kworker/1:3", pid 5345, jiffies 4294945276 hex dump (first 32 bytes): 58 47 ec 10 81 88 ff ff 58 47 ec 10 81 88 ff ff XG......XG...... 10 53 1a 28 81 88 ff ff 10 53 1a 28 81 88 ff ff .S.(.....S.(.... backtrace (crc 58363894): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kvmalloc_node_noprof+0x537/0x760 mm/slub.c:6832 v4l2_ctrl_new+0x2bb/0x1470 drivers/media/v4l2-core/v4l2-ctrls-core.c:2139 v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2293 handler_new_ref+0x34d/0x440 drivers/media/v4l2-core/v4l2-ctrls-core.c:1874 v4l2_ctrl_add_handler drivers/media/v4l2-core/v4l2-ctrls-core.c:2443 [inline] v4l2_ctrl_add_handler+0x12d/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2417 msi2500_probe+0x2e0/0x390 drivers/media/usb/msi2500/msi2500.c:1256 usb_probe_interface+0x22a/0x4e0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:631 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:709 __driver_probe_device+0xe8/0x1a0 drivers/base/dd.c:871 driver_probe_device+0x2a/0x120 drivers/base/dd.c:901 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1029 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1101 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1156 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:613 device_add+0x99b/0xc70 drivers/base/core.c:3706 BUG: memory leak unreferenced object 0xffff88812a2a3e80 (size 64): comm "kworker/1:3", pid 5345, jiffies 4294945276 hex dump (first 32 bytes): 40 3e 2a 2a 81 88 ff ff 68 47 ec 10 81 88 ff ff @>**....hG...... 00 00 00 00 00 00 00 00 00 53 1a 28 81 88 ff ff .........S.(.... backtrace (crc ca953fb9): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] handler_new_ref+0xd9/0x440 drivers/media/v4l2-core/v4l2-ctrls-core.c:1882 v4l2_ctrl_new+0x69e/0x1470 drivers/media/v4l2-core/v4l2-ctrls-core.c:2222 v4l2_ctrl_new_std+0x122/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2293 handler_new_ref+0x34d/0x440 drivers/media/v4l2-core/v4l2-ctrls-core.c:1874 v4l2_ctrl_add_handler drivers/media/v4l2-core/v4l2-ctrls-core.c:2443 [inline] v4l2_ctrl_add_handler+0x12d/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2417 msi2500_probe+0x2e0/0x390 drivers/media/usb/msi2500/msi2500.c:1256 usb_probe_interface+0x22a/0x4e0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:631 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:709 __driver_probe_device+0xe8/0x1a0 drivers/base/dd.c:871 driver_probe_device+0x2a/0x120 drivers/base/dd.c:901 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1029 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1101 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1156 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:613 BUG: memory leak unreferenced object 0xffff88812a2a3e40 (size 64): comm "kworker/1:3", pid 5345, jiffies 4294945276 hex dump (first 32 bytes): 00 3e 2a 2a 81 88 ff ff 80 3e 2a 2a 81 88 ff ff .>**.....>**.... 80 3e 2a 2a 81 88 ff ff 00 59 1a 28 81 88 ff ff .>**.....Y.(.... backtrace (crc 1280a325): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] handler_new_ref+0xd9/0x440 drivers/media/v4l2-core/v4l2-ctrls-core.c:1882 v4l2_ctrl_add_handler drivers/media/v4l2-core/v4l2-ctrls-core.c:2443 [inline] v4l2_ctrl_add_handler+0x12d/0x180 drivers/media/v4l2-core/v4l2-ctrls-core.c:2417 msi2500_probe+0x2e0/0x390 drivers/media/usb/msi2500/msi2500.c:1256 usb_probe_interface+0x22a/0x4e0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:631 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:709 __driver_probe_device+0xe8/0x1a0 drivers/base/dd.c:871 driver_probe_device+0x2a/0x120 drivers/base/dd.c:901 __device_attach_driver+0x10f/0x170 drivers/base/dd.c:1029 bus_for_each_drv+0xd2/0x130 drivers/base/bus.c:500 __device_attach+0xf9/0x290 drivers/base/dd.c:1101 device_initial_probe+0x6f/0x80 drivers/base/dd.c:1156 bus_probe_device+0x3e/0xb0 drivers/base/bus.c:613 device_add+0x99b/0xc70 drivers/base/core.c:3706 usb_set_configuration+0x8f5/0xb80 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x73/0xb0 drivers/usb/core/generic.c:250 connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF Tested on: commit: 917719c4 Merge tag 'selinux-pr-20260507' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14a55f48580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c47d4d4befc65788 dashboard link: https://syzkaller.appspot.com/bug?extid=b1de0d5fd8a15fac11aa compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Note: no patches were applied.