Description

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov772x: Fix memleak in ov772x_probe() A memory leak was reported when testing ov772x with bpf mock device: AssertionError: unreferenced object 0xffff888109afa7a8 (size 8): comm "python3", pid 279, jiffies 4294805921 (age 20.681s) hex dump (first 8 bytes): 80 22 88 15 81 88 ff ff ."...... backtrace: [] __kmalloc_node+0x44/0x1b0 [] kvmalloc_node+0x34/0x180 [] v4l2_ctrl_handler_init_class+0x11d/0x180 [videodev] [] ov772x_probe+0x1c3/0x68c [ov772x] [] i2c_device_probe+0x28d/0x680 [] really_probe+0x17c/0x3f0 [] __driver_probe_device+0xe3/0x170 [] driver_probe_device+0x49/0x120 [] __device_attach_driver+0xf7/0x150 [] bus_for_each_drv+0x114/0x180 [] __device_attach+0x1e5/0x2d0 [] bus_probe_device+0x126/0x140 [] device_add+0x810/0x1130 [] i2c_new_client_device+0x359/0x4f0 [] of_i2c_register_device+0xf1/0x110 [] of_i2c_notify+0x100/0x160 unreferenced object 0xffff888119825c00 (size 256): comm "python3", pid 279, jiffies 4294805921 (age 20.681s) hex dump (first 32 bytes): 00 b4 a5 17 81 88 ff ff 00 5e 82 19 81 88 ff ff .........^...... 10 5c 82 19 81 88 ff ff 10 5c 82 19 81 88 ff ff .\.......\...... backtrace: [] __kmalloc_node+0x44/0x1b0 [] kvmalloc_node+0x34/0x180 [] v4l2_ctrl_new.cold+0x19b/0x86f [videodev] [] v4l2_ctrl_new_std+0x16f/0x210 [videodev] [] ov772x_probe+0x1fa/0x68c [ov772x] [] i2c_device_probe+0x28d/0x680 [] really_probe+0x17c/0x3f0 [] __driver_probe_device+0xe3/0x170 [] driver_probe_device+0x49/0x120 [] __device_attach_driver+0xf7/0x150 [] bus_for_each_drv+0x114/0x180 [] __device_attach+0x1e5/0x2d0 [] bus_probe_device+0x126/0x140 [] device_add+0x810/0x1130 [] i2c_new_client_device+0x359/0x4f0 [] of_i2c_register_device+0xf1/0x110 The reason is that if priv->hdl.error is set, ov772x_probe() jumps to the error_mutex_destroy without doing v4l2_ctrl_handler_free(), and all resources allocated in v4l2_ctrl_handler_init() and v4l2_ctrl_new_std() are leaked.