linux-cve-announce - CVE-2024-41087: ata: libata-core: Fix double free on error

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Message-ID: <2024072952-CVE-2024-41087-7924@gregkh>
Date: Mon, 29 Jul 2024 17:48:51 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-41087: ata: libata-core: Fix double free on error

Description
===========

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

ata: libata-core: Fix double free on error

If e.g. the ata_port_alloc() call in ata_host_alloc() fails, we will jump
to the err_out label, which will call devres_release_group().
devres_release_group() will trigger a call to ata_host_release().
ata_host_release() calls kfree(host), so executing the kfree(host) in
ata_host_alloc() will lead to a double free:

kernel BUG at mm/slub.c:553!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 11 PID: 599 Comm: (udev-worker) Not tainted 6.10.0-rc5 #47
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014
RIP: 0010:kfree+0x2cf/0x2f0
Code: 5d 41 5e 41 5f 5d e9 80 d6 ff ff 4d 89 f1 41 b8 01 00 00 00 48 89 d9 48 89 da
RSP: 0018:ffffc90000f377f0 EFLAGS: 00010246
RAX: ffff888112b1f2c0 RBX: ffff888112b1f2c0 RCX: ffff888112b1f320
RDX: 000000000000400b RSI: ffffffffc02c9de5 RDI: ffff888112b1f2c0
RBP: ffffc90000f37830 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90000f37610 R11: 617461203a736b6e R12: ffffea00044ac780
R13: ffff888100046400 R14: ffffffffc02c9de5 R15: 0000000000000006
FS:  00007f2f1cabe980(0000) GS:ffff88813b380000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f1c3acf75 CR3: 0000000111724000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 <TASK>
 ? __die_body.cold+0x19/0x27
 ? die+0x2e/0x50
 ? do_trap+0xca/0x110
 ? do_error_trap+0x6a/0x90
 ? kfree+0x2cf/0x2f0
 ? exc_invalid_op+0x50/0x70
 ? kfree+0x2cf/0x2f0
 ? asm_exc_invalid_op+0x1a/0x20
 ? ata_host_alloc+0xf5/0x120 [libata]
 ? ata_host_alloc+0xf5/0x120 [libata]
 ? kfree+0x2cf/0x2f0
 ata_host_alloc+0xf5/0x120 [libata]
 ata_host_alloc_pinfo+0x14/0xa0 [libata]
 ahci_init_one+0x6c9/0xd20 [ahci]

Ensure that we will not call kfree(host) twice, by performing the kfree()
only if the devres_open_group() call failed.

The Linux kernel CVE team has assigned CVE-2024-41087 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 4.19.317 with commit 290073b2b557
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 5.4.279 with commit 56f1c7e290cd
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 5.10.221 with commit 010de9acbea5
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 5.15.162 with commit 5dde5f8b7902
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 6.1.97 with commit 702c1edbafb2
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 6.6.37 with commit 062e256516d7
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 6.9.8 with commit 8106da4d88bb
	Issue introduced in 4.17 with commit dafd6c496381 and fixed in 6.10 with commit ab9e0c529eb7

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-41087
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/ata/libata-core.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/290073b2b557e4dc21ee74a1e403d9ae79e393a2
	https://git.kernel.org/stable/c/56f1c7e290cd6c69c948fcd2e2a49e6a637ec38f
	https://git.kernel.org/stable/c/010de9acbea58fbcbda08e3793d6262086a493fe
	https://git.kernel.org/stable/c/5dde5f8b790274723640d29a07c5a97d57d62047
	https://git.kernel.org/stable/c/702c1edbafb2e6f9d20f6d391273b5be09d366a5
	https://git.kernel.org/stable/c/062e256516d7db5e7dcdef117f52025cd5c456e3
	https://git.kernel.org/stable/c/8106da4d88bbaed809e023cc8014b766223d6e76
	https://git.kernel.org/stable/c/ab9e0c529eb7cafebdd31fe1644524e80a48b05d