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In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to truncate preallocated blocks in f2fs_file_open()
chenyuwen reports a f2fs bug as below:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000011 fscrypt_set_bio_crypt_ctx+0x78/0x1e8 f2fs_grab_read_bio+0x78/0x208 f2fs_submit_page_read+0x44/0x154 f2fs_get_read_data_page+0x288/0x5f4 f2fs_get_lock_data_page+0x60/0x190 truncate_partial_data_page+0x108/0x4fc f2fs_do_truncate_blocks+0x344/0x5f0 f2fs_truncate_blocks+0x6c/0x134 f2fs_truncate+0xd8/0x200 f2fs_iget+0x20c/0x5ac do_garbage_collect+0x5d0/0xf6c f2fs_gc+0x22c/0x6a4 f2fs_disable_checkpoint+0xc8/0x310 f2fs_fill_super+0x14bc/0x1764 mount_bdev+0x1b4/0x21c f2fs_mount+0x20/0x30 legacy_get_tree+0x50/0xbc vfs_get_tree+0x5c/0x1b0 do_new_mount+0x298/0x4cc path_mount+0x33c/0x5fc __arm64_sys_mount+0xcc/0x15c invoke_syscall+0x60/0x150 el0_svc_common+0xb8/0xf8 do_el0_svc+0x28/0xa0 el0_svc+0x24/0x84 el0t_64_sync_handler+0x88/0xec
It is because inode.i_crypt_info is not initialized during below path: - mount - f2fs_fill_super - f2fs_disable_checkpoint - f2fs_gc - f2fs_iget - f2fs_truncate
So, let's relocate truncation of preallocated blocks to f2fs_file_open(), after fscrypt_file_open().
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | Oct 7, 2024 | Aug 17, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-raspiUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-50-genericUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-kvmUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-azure-fdeUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-oracleUpgrade linux-image-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-oem-24.04aUpgrade linux-image-oracle-64kUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-azureUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-genericUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-generic-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1020-awsUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-ibmUpgrade linux-image-gkeopUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1018-oemUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-nvidiaUpgrade linux-image-oem-22.04a | Dec 13, 2024 | Aug 17, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Aug 17, 2024 |
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