CVE-2026-90385
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid1: create serial pool adding rdev to array with serialize_policy=1 The following bug has been observed with kernel 7.1.3 after adding a new rdev to an existing RAID1 array with serialize_policy enabled: Oops: 0002 [#1] CPU: 0 UID: 0 PID: 19639 Comm: ext4lazyinit Not tainted 7.1.3-1-default RIP: _raw_spin_lock_irqsave+0x27/0x50 CR2: 0000000000004960 Call Trace: wait_for_serialization+0xb9/0x260 [raid1] raid1_make_request+0x762/0xaff [raid1] md_handle_request+0x1c9/0x2e0 [md_mod] The raid1.c code calls wait_for_serialization() if the MD_SERIALIZE_POLICY is set, and wait_for_serialization assumes that rdev->serial is initialized. Normally this will be the case for arrays that have the serialize_policy sysfs attribute set to 1. But when a new rdev is added to an existing array in bind_rdev_to_array(), the condition at mddev_create_serial_pool() causes creation of rdev->serial to be skipped. Fix it.
How to fix
- Linux Linux6ea458171bed2b706dc7bcd80b15356c0e9ed718, 0b187e14dab458d54425fc400f1e1e8d481d9bcf, f9e4364449f7ca6917f3599eb32064dba5b7b147, 37f11973c3eb72a5eb061082cad529bb6939c24f, c02d675e81468003e4f2253b616c53729070d712, 140234b2380ffb8ffb0cfc46fee0e822f43adef7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < 6ea458171bed2b706dc7bcd80b15356c0e9ed718, 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < 0b187e14dab458d54425fc400f1e1e8d481d9bcf, 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < f9e4364449f7ca6917f3599eb32064dba5b7b147, 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < 37f11973c3eb72a5eb061082cad529bb6939c24f, 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < c02d675e81468003e4f2253b616c53729070d712, 69b00b5bb23552d43e8bbed73ef6624604bb94a2 ≤ v < 140234b2380ffb8ffb0cfc46fee0e822f43adef7, 5.6 | 6ea458171bed2b706dc7bcd80b15356c0e9ed718, 0b187e14dab458d54425fc400f1e1e8d481d9bcf, f9e4364449f7ca6917f3599eb32064dba5b7b147, 37f11973c3eb72a5eb061082cad529bb6939c24f, c02d675e81468003e4f2253b616c53729070d712, 140234b2380ffb8ffb0cfc46fee0e822f43adef7 |
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