CVE-2024-41087

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ata: libata-core: Fix double free on error<br /> <br /> If e.g. the ata_port_alloc() call in ata_host_alloc() fails, we will jump<br /> to the err_out label, which will call devres_release_group().<br /> devres_release_group() will trigger a call to ata_host_release().<br /> ata_host_release() calls kfree(host), so executing the kfree(host) in<br /> ata_host_alloc() will lead to a double free:<br /> <br /> kernel BUG at mm/slub.c:553!<br /> Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI<br /> CPU: 11 PID: 599 Comm: (udev-worker) Not tainted 6.10.0-rc5 #47<br /> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014<br /> RIP: 0010:kfree+0x2cf/0x2f0<br /> 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<br /> RSP: 0018:ffffc90000f377f0 EFLAGS: 00010246<br /> RAX: ffff888112b1f2c0 RBX: ffff888112b1f2c0 RCX: ffff888112b1f320<br /> RDX: 000000000000400b RSI: ffffffffc02c9de5 RDI: ffff888112b1f2c0<br /> RBP: ffffc90000f37830 R08: 0000000000000000 R09: 0000000000000000<br /> R10: ffffc90000f37610 R11: 617461203a736b6e R12: ffffea00044ac780<br /> R13: ffff888100046400 R14: ffffffffc02c9de5 R15: 0000000000000006<br /> FS: 00007f2f1cabe980(0000) GS:ffff88813b380000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 00007f2f1c3acf75 CR3: 0000000111724000 CR4: 0000000000750ef0<br /> PKRU: 55555554<br /> Call Trace:<br /> <br /> ? __die_body.cold+0x19/0x27<br /> ? die+0x2e/0x50<br /> ? do_trap+0xca/0x110<br /> ? do_error_trap+0x6a/0x90<br /> ? kfree+0x2cf/0x2f0<br /> ? exc_invalid_op+0x50/0x70<br /> ? kfree+0x2cf/0x2f0<br /> ? asm_exc_invalid_op+0x1a/0x20<br /> ? ata_host_alloc+0xf5/0x120 [libata]<br /> ? ata_host_alloc+0xf5/0x120 [libata]<br /> ? kfree+0x2cf/0x2f0<br /> ata_host_alloc+0xf5/0x120 [libata]<br /> ata_host_alloc_pinfo+0x14/0xa0 [libata]<br /> ahci_init_one+0x6c9/0xd20 [ahci]<br /> <br /> Ensure that we will not call kfree(host) twice, by performing the kfree()<br /> only if the devres_open_group() call failed.