CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-50229 – nilfs2: fix potential deadlock with newly created symlinks
https://notcve.org/view.php?id=CVE-2024-50229
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential deadlock with newly created symlinks Syzbot reported that page_symlink(), called by nilfs_symlink(), triggers memory reclamation involving the filesystem layer, which can result in circular lock dependencies among the reader/writer semaphore nilfs->ns_segctor_sem, s_writers percpu_rwsem (intwrite) and the fs_reclaim pseudo lock. This is because after commit 21fc61c73c39 ("don't put symlink bodies in pagecache into highmem"), the gfp flags of the page cache for symbolic links are overwritten to GFP_KERNEL via inode_nohighmem(). This is not a problem for symlinks read from the backing device, because the __GFP_FS flag is dropped after inode_nohighmem() is called. However, when a new symlink is created with nilfs_symlink(), the gfp flags remain overwritten to GFP_KERNEL. Then, memory allocation called from page_symlink() etc. triggers memory reclamation including the FS layer, which may call nilfs_evict_inode() or nilfs_dirty_inode(). And these can cause a deadlock if they are called while nilfs->ns_segctor_sem is held: Fix this issue by dropping the __GFP_FS flag from the page cache GFP flags of newly created symlinks in the same way that nilfs_new_inode() and __nilfs_read_inode() do, as a workaround until we adopt nofs allocation scope consistently or improve the locking constraints. • https://git.kernel.org/stable/c/21fc61c73c3903c4c312d0802da01ec2b323d174 https://git.kernel.org/stable/c/076e4ab3279eb3ddb206de44d04df7aeb2428e09 https://git.kernel.org/stable/c/cc38c596e648575ce58bfc31623a6506eda4b94a https://git.kernel.org/stable/c/a1686db1e59f8fc016c4c9361e2119dd206f479a https://git.kernel.org/stable/c/c72e0df0b56c1166736dc8eb62070ebb12591447 https://git.kernel.org/stable/c/69548bb663fcb63f9ee0301be808a36b9d78dac3 https://git.kernel.org/stable/c/58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38 https://git.kernel.org/stable/c/1246d86e7bbde265761932c6e2dce28c6 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-50218 – ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow
https://notcve.org/view.php?id=CVE-2024-50218
In the Linux kernel, the following vulnerability has been resolved: ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow Syzbot reported a kernel BUG in ocfs2_truncate_inline. There are two reasons for this: first, the parameter value passed is greater than ocfs2_max_inline_data_with_xattr, second, the start and end parameters of ocfs2_truncate_inline are "unsigned int". So, we need to add a sanity check for byte_start and byte_len right before ocfs2_truncate_inline() in ocfs2_remove_inode_range(), if they are greater than ocfs2_max_inline_data_with_xattr return -EINVAL. • https://git.kernel.org/stable/c/1afc32b952335f665327a1a9001ba1b44bb76fd9 https://git.kernel.org/stable/c/27d95867bee806cdc448d122bd99f1d8b0544035 https://git.kernel.org/stable/c/95fbed8ae8c32c0977e6be1721c190d8fea23f2f https://git.kernel.org/stable/c/70767689ec6ee5f05fb0a2c17d7ec1927946e486 https://git.kernel.org/stable/c/ecd62f684386fa64f9c0cea92eea361f4e6444c2 https://git.kernel.org/stable/c/2fe5d62e122b040ce7fc4d31aa7fa96ae328cefc https://git.kernel.org/stable/c/88f97a4b5843ce21c1286e082c02a5fb4d8eb473 https://git.kernel.org/stable/c/0b6b8c2055784261de3fb641c5d0d6396 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50217 – btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()
https://notcve.org/view.php?id=CVE-2024-50217
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids() Mounting btrfs from two images (which have the same one fsid and two different dev_uuids) in certain executing order may trigger an UAF for variable 'device->bdev_file' in __btrfs_free_extra_devids(). And following are the details: 1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs devices by ioctl(BTRFS_IOC_SCAN_DEV): / btrfs_device_1 → loop0 fs_device \ btrfs_device_2 → loop1 2. mount /dev/loop0 /mnt btrfs_open_devices btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0) btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1) btrfs_fill_super open_ctree fail: btrfs_close_devices // -ENOMEM btrfs_close_bdev(btrfs_device_1) fput(btrfs_device_1->bdev_file) // btrfs_device_1->bdev_file is freed btrfs_close_bdev(btrfs_device_2) fput(btrfs_device_2->bdev_file) 3. mount /dev/loop1 /mnt btrfs_open_devices btrfs_get_bdev_and_sb(&bdev_file) // EIO, btrfs_device_1->bdev_file is not assigned, // which points to a freed memory area btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1) btrfs_fill_super open_ctree btrfs_free_extra_devids if (btrfs_device_1->bdev_file) fput(btrfs_device_1->bdev_file) // UAF ! Fix it by setting 'device->bdev_file' as 'NULL' after closing the btrfs_device in btrfs_close_one_device(). • https://git.kernel.org/stable/c/142388194191a3edc9ba01cfcfd8b691e0971fb2 https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343 • CWE-416: Use After Free •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-50211 – udf: refactor inode_bmap() to handle error
https://notcve.org/view.php?id=CVE-2024-50211
In the Linux kernel, the following vulnerability has been resolved: udf: refactor inode_bmap() to handle error Refactor inode_bmap() to handle error since udf_next_aext() can return error now. On situations like ftruncate, udf_extend_file() can now detect errors and bail out early without resorting to checking for particular offsets and assuming internal behavior of these functions. • https://git.kernel.org/stable/c/493447dd8336607fce426f7879e581095f6c606e https://git.kernel.org/stable/c/b22d9a5698abf04341f8fbc30141e0673863c3a6 https://git.kernel.org/stable/c/c226964ec786f3797ed389a16392ce4357697d24 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-50205 – ALSA: firewire-lib: Avoid division by zero in apply_constraint_to_size()
https://notcve.org/view.php?id=CVE-2024-50205
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-lib: Avoid division by zero in apply_constraint_to_size() The step variable is initialized to zero. It is changed in the loop, but if it's not changed it will remain zero. Add a variable check before the division. The observed behavior was introduced by commit 826b5de90c0b ("ALSA: firewire-lib: fix insufficient PCM rule for period/buffer size"), and it is difficult to show that any of the interval parameters will satisfy the snd_interval_test() condition with data from the amdtp_rate_table[] table. Found by Linux Verification Center (linuxtesting.org) with SVACE. • https://git.kernel.org/stable/c/826b5de90c0bca4e9de6231da9e1730480621588 https://git.kernel.org/stable/c/d575414361630b8b0523912532fcd7c79e43468c https://git.kernel.org/stable/c/5e431f85c87bbffd93a9830d5a576586f9855291 https://git.kernel.org/stable/c/7d4eb9e22131ec154e638cbd56629195c9bcbe9a https://git.kernel.org/stable/c/d2826873db70a6719cdd9212a6739f3e6234cfc4 https://git.kernel.org/stable/c/4bdc21506f12b2d432b1f2667e5ff4c75eee58e3 https://git.kernel.org/stable/c/3452d39c4704aa12504e4190298c721fb01083c3 https://git.kernel.org/stable/c/72cafe63b35d06b5cfbaf807e90ae6579 •