CVE-2023-53271
Description
In the Linux kernel, the following vulnerability has been resolved: ubi: Fix unreferenced object reported by kmemleak in ubi_resize_volume() There is a memory leaks problem reported by kmemleak: unreferenced object 0xffff888102007a00 (size 128): comm "ubirsvol", pid 32090, jiffies 4298464136 (age 2361.231s) hex dump (first 32 bytes): ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ backtrace: [<ffffffff8176cecd>] __kmalloc+0x4d/0x150 [<ffffffffa02a9a36>] ubi_eba_create_table+0x76/0x170 [ubi] [<ffffffffa029764e>] ubi_resize_volume+0x1be/0xbc0 [ubi] [<ffffffffa02a3321>] ubi_cdev_ioctl+0x701/0x1850 [ubi] [<ffffffff81975d2d>] __x64_sys_ioctl+0x11d/0x170 [<ffffffff83c142a5>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 This is due to a mismatch between create and destroy interfaces, and in detail that "new_eba_tbl" created by ubi_eba_create_table() but destroyed by kfree(), while will causing "new_eba_tbl->entries" not freed. Fix it by replacing kfree(new_eba_tbl) with ubi_eba_destroy_table(new_eba_tbl)
How to fix
- linux linux_kernel4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.9 ≤ v < 4.14.308, 4.15 ≤ v < 4.19.276, 4.20 ≤ v < 5.4.235, 5.5 ≤ v < 5.10.173, 5.11 ≤ v < 5.15.100, 5.16 ≤ v < 6.1.18, 6.2 ≤ v < 6.2.5 | 4.14.308, 4.19.276, 5.4.235, 5.10.173, 5.15.100, 6.1.18, 6.2.5 |
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