In the Linux kernel, the following vulnerability has been resolved:
iommufd: Fix protection fault in iommufd_test_syz_conv_iova
Syzkaller reported the following bug:
general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
Call Trace:
lock_acquire
lock_acquire+0x1ce/0x4f0
down_read+0x93/0x4a0
iommufd_test_syz_conv_iova+0x56/0x1f0
iommufd_test_access_rw.isra.0+0x2ec/0x390
iommufd_test+0x1058/0x1e30
iommufd_fops_ioctl+0x381/0x510
vfs_ioctl
__do_sys_ioctl
__se_sys_ioctl
__x64_sys_ioctl+0x170/0x1e0
do_syscall_x64
do_syscall_64+0x71/0x140
This is because the new iommufd_access_change_ioas() sets access->ioas to
NULL during its process, so the lock might be gone in a concurrent racing
context.
Fix this by doing the same access->ioas sanity as iommufd_access_rw() and
iommufd_access_pin_pages() functions do.
Metrics
Affected Vendors & Products
References
History
Wed, 13 Nov 2024 02:45:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Redhat
Redhat enterprise Linux |
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CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
Vendors & Products |
Redhat
Redhat enterprise Linux |
Thu, 07 Nov 2024 19:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-120 |
Thu, 10 Oct 2024 11:45:00 +0000
Type | Values Removed | Values Added |
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References |
|
Thu, 19 Sep 2024 10:45:00 +0000
Type | Values Removed | Values Added |
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Weaknesses | CWE-400 |
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-04-04T08:20:18.467Z
Updated: 2024-11-07T18:54:48.729Z
Reserved: 2024-02-19T14:20:24.178Z
Link: CVE-2024-26785
Vulnrichment
Updated: 2024-08-02T00:14:13.352Z
NVD
Status : Awaiting Analysis
Published: 2024-04-04T09:15:08.187
Modified: 2024-11-21T09:03:03.967
Link: CVE-2024-26785
Redhat