CVE-2022-50772
Description
In the Linux kernel, the following vulnerability has been resolved: netdevsim: fix memory leak in nsim_bus_dev_new() If device_register() failed in nsim_bus_dev_new(), the value of reference in nsim_bus_dev->dev is 1. obj->name in nsim_bus_dev->dev will not be released. unreferenced object 0xffff88810352c480 (size 16): comm "echo", pid 5691, jiffies 4294945921 (age 133.270s) hex dump (first 16 bytes): 6e 65 74 64 65 76 73 69 6d 31 00 00 00 00 00 00 netdevsim1...... backtrace: [<000000005e2e5e26>] __kmalloc_node_track_caller+0x3a/0xb0 [<0000000094ca4fc8>] kvasprintf+0xc3/0x160 [<00000000aad09bcc>] kvasprintf_const+0x55/0x180 [<000000009bac868d>] kobject_set_name_vargs+0x56/0x150 [<000000007c1a5d70>] dev_set_name+0xbb/0xf0 [<00000000ad0d126b>] device_add+0x1f8/0x1cb0 [<00000000c222ae24>] new_device_store+0x3b6/0x5e0 [<0000000043593421>] bus_attr_store+0x72/0xa0 [<00000000cbb1833a>] sysfs_kf_write+0x106/0x160 [<00000000d0dedb8a>] kernfs_fop_write_iter+0x3a8/0x5a0 [<00000000770b66e2>] vfs_write+0x8f0/0xc80 [<0000000078bb39be>] ksys_write+0x106/0x210 [<00000000005e55a4>] do_syscall_64+0x35/0x80 [<00000000eaa40bbc>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
How to fix
- Linux Linux77579e4065295071fbd9662f03430dca5b50b086, cf2010aa1c739bab067cbc90b690d28eaa0b47da or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 40e4fe4ce115c409c3e2fbb247085103ef1cc755 ≤ v < 77579e4065295071fbd9662f03430dca5b50b086, 40e4fe4ce115c409c3e2fbb247085103ef1cc755 ≤ v < cf2010aa1c739bab067cbc90b690d28eaa0b47da, 5.2 | 77579e4065295071fbd9662f03430dca5b50b086, cf2010aa1c739bab067cbc90b690d28eaa0b47da |
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