CVE-2023-53078

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate()

If alua_rtpg_queue() failed from alua_activate(), then 'qdata' is not freed, which will cause following memleak:

unreferenced object 0xffff88810b2c6980 (size 32): comm "kworker/u16:2", pid 635322, jiffies 4355801099 (age 1216426.076s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. 40 39 24 c1 ff ff ff ff 00 f8 ea 0a 81 88 ff ff @9$…………. backtrace: [<0000000098f3a26d>] alua_activate+0xb0/0x320 [<000000003b529641>] scsi_dh_activate+0xb2/0x140 [<000000007b296db3>] activate_path_work+0xc6/0xe0 [dm_multipath] [<000000007adc9ace>] process_one_work+0x3c5/0x730 [<00000000c457a985>] worker_thread+0x93/0x650 [<00000000cb80e628>] kthread+0x1ba/0x210 [<00000000a1e61077>] ret_from_fork+0x22/0x30

Fix the problem by freeing 'qdata' in error path.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/123483df146492ca22b503ae6dacc2ce7c3a3974
• https://git.kernel.org/stable/c/c110051d335ef7f62ad33474b0c23997fee5bfb5
• https://git.kernel.org/stable/c/5c4d71424df34fc23dc5336d09394ce68c849542
• https://git.kernel.org/stable/c/c09cdf6eb815ee35e55d6c50ac7f63db58bd20b8
• https://git.kernel.org/stable/c/9311e7a554dffd3823499e309a8b86a5cd1540e5
• https://git.kernel.org/stable/c/1c55982beb80c7d3c30278fc6cfda8496a31dbe6
• https://git.kernel.org/stable/c/0d89254a4320eb7de0970c478172f764125c6355
• https://git.kernel.org/stable/c/a13faca032acbf2699293587085293bdfaafc8ae

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