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In the Linux kernel, the following vulnerability has been resolved:
drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes
drm_cvt_mode may return NULL and we should check it.
This bug is found by syzkaller:
FAULT_INJECTION stacktrace: [ 168.567394] FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 [ 168.567403] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1 [ 168.567406] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 168.567408] Call trace: [ 168.567414] dump_backtrace+0x0/0x310 [ 168.567418] show_stack+0x28/0x38 [ 168.567423] dump_stack+0xec/0x15c [ 168.567427] should_fail+0x3ac/0x3d0 [ 168.567437] __should_failslab+0xb8/0x120 [ 168.567441] should_failslab+0x28/0xc0 [ 168.567445] kmem_cache_alloc_trace+0x50/0x640 [ 168.567454] drm_mode_create+0x40/0x90 [ 168.567458] drm_cvt_mode+0x48/0xc78 [ 168.567477] virtio_gpu_conn_get_modes+0xa8/0x140 [virtio_gpu] [ 168.567485] drm_helper_probe_single_connector_modes+0x3a4/0xd80 [ 168.567492] drm_mode_getconnector+0x2e0/0xa70 [ 168.567496] drm_ioctl_kernel+0x11c/0x1d8 [ 168.567514] drm_ioctl+0x558/0x6d0 [ 168.567522] do_vfs_ioctl+0x160/0xf30 [ 168.567525] ksys_ioctl+0x98/0xd8 [ 168.567530] __arm64_sys_ioctl+0x50/0xc8 [ 168.567536] el0_svc_common+0xc8/0x320 [ 168.567540] el0_svc_handler+0xf8/0x160 [ 168.567544] el0_svc+0x10/0x218
KASAN stacktrace: [ 168.567561] BUG: KASAN: null-ptr-deref in virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu] [ 168.567565] Read of size 4 at addr 0000000000000054 by task syz/6425 [ 168.567566] [ 168.567571] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1 [ 168.567573] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 [ 168.567575] Call trace: [ 168.567578] dump_backtrace+0x0/0x310 [ 168.567582] show_stack+0x28/0x38 [ 168.567586] dump_stack+0xec/0x15c [ 168.567591] kasan_report+0x244/0x2f0 [ 168.567594] __asan_load4+0x58/0xb0 [ 168.567607] virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu] [ 168.567612] drm_helper_probe_single_connector_modes+0x3a4/0xd80 [ 168.567617] drm_mode_getconnector+0x2e0/0xa70 [ 168.567621] drm_ioctl_kernel+0x11c/0x1d8 [ 168.567624] drm_ioctl+0x558/0x6d0 [ 168.567628] do_vfs_ioctl+0x160/0xf30 [ 168.567632] ksys_ioctl+0x98/0xd8 [ 168.567636] __arm64_sys_ioctl+0x50/0xc8 [ 168.567641] el0_svc_common+0xc8/0x320 [ 168.567645] el0_svc_handler+0xf8/0x160 [ 168.567649] el0_svc+0x10/0x218
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-4.14.285-215.501Upgrade bpftoolUpgrade python-perfUpgrade kernel-toolsUpgrade perfUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-develUpgrade kernel-livepatch-5.10.126-117.518Upgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade kernelUpgrade kernel-debuginfo | Mar 14, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel | May 13, 2025 | Feb 26, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel | Jun 11, 2025 | Feb 26, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-oracle-5.15Upgrade linux-aws-5.15Upgrade linux-oracle-5.4Upgrade linux-azure-fipsUpgrade linux-ibm-5.4Upgrade linux-gcpUpgrade linux-raspi-5.4Upgrade linux-intel-iotgUpgrade linux-awsUpgrade linuxUpgrade linux-aws-hweUpgrade linux-fipsUpgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linux-riscv-5.15Upgrade linux-gcp-5.4Upgrade linux-gkeUpgrade linux-aws-5.4Upgrade linux-hweUpgrade linux-iotUpgrade linux-nvidiaUpgrade linux-azure-5.4Upgrade linux-gkeopUpgrade linux-azure-fde-5.15Upgrade linux-gcp-fipsUpgrade linux-realtimeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-oracleUpgrade linux-raspiUpgrade linux-hwe-5.4Upgrade linux-kvmUpgrade linux-azure-4.15Upgrade linux-azureUpgrade linux-aws-fipsUpgrade linux-hwe-5.15Upgrade linux-gcp-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.15Upgrade linux-ibm | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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