CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-44972 – btrfs: do not clear page dirty inside extent_write_locked_range()
https://notcve.org/view.php?id=CVE-2024-44972
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not clear page dirty inside extent_write_locked_range() [BUG] For subpage + zoned case, the following workload can lead to rsv data leak at unmount time: # mkfs.btrfs -f -s 4k $dev # mount $dev $mnt # fsstress -w -n 8 -d $mnt -s 1709539240 0/0: fiemap - no filename 0/1: copyrange read - no filename 0/2: write - no filename 0/3: rename - no source filename 0/4: creat f0 x:0 0 0 0/4: creat add id=0,parent=-1 0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0 0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1 0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat() 0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0 # umount $mnt The dmesg includes the following rsv leak detection warning (all call trace skipped): ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): space_info DATA has 268218368 free, is not full BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0 BTRFS info (device sda): global_block_rsv: size 0 reserved 0 BTRFS info (device sda): trans_block_rsv: size 0 reserved 0 BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs] ---[ end trace 0000000000000000 ]--- BTRFS info (device sda): space_info METADATA has 267796480 free, is not full BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760 BTRFS info (device sda): global_block_rsv: size 0 reserved 0 BTRFS info (device sda): trans_block_rsv: size 0 reserved 0 BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0 BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0 Above $dev is a tcmu-runner emulated zoned HDD, which has a max zone append size of 64K, and the system has 64K page size. [CAUSE] I have added several trace_printk() to show the events (header skipped): > btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688 > btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288 > btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536 > btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864 The above lines show our buffered write has dirtied 3 pages of inode 259 of root 5: 704K 768K 832K 896K I |////I/////////////////I///////////| I 756K 868K |///| is the dirtied range using subpage bitmaps. and 'I' is the page boundary. Meanwhile all three pages (704K, 768K, 832K) have their PageDirty flag set. > btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400 Then direct IO writ ---truncated--- • https://git.kernel.org/stable/c/ba4dedb71356638d8284e34724daca944be70368 https://git.kernel.org/stable/c/d3b403209f767e5857c1b9fda66726e6e6ffc99f https://git.kernel.org/stable/c/97713b1a2ced1e4a2a6c40045903797ebd44d7e0 •
CVSS: 7.1EPSS: 0%CPEs: 4EXPL: 0CVE-2024-44970 – net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink
https://notcve.org/view.php?id=CVE-2024-44970
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: SHAMPO, Fix invalid WQ linked list unlink When all the strides in a WQE have been consumed, the WQE is unlinked from the WQ linked list (mlx5_wq_ll_pop()). For SHAMPO, it is possible to receive CQEs with 0 consumed strides for the same WQE even after the WQE is fully consumed and unlinked. This triggers an additional unlink for the same wqe which corrupts the linked list. Fix this scenario by accepting 0 sized consumed strides without unlinking the WQE again. • https://git.kernel.org/stable/c/7b379353e9144e1f7460ff15f39862012c9d0d78 https://git.kernel.org/stable/c/650e24748e1e0a7ff91d5c72b72a2f2a452b5b76 https://git.kernel.org/stable/c/50d8009a0ac02c3311b23a0066511f8337bd88d9 https://git.kernel.org/stable/c/fba8334721e266f92079632598e46e5f89082f30 https://access.redhat.com/security/cve/CVE-2024-44970 https://bugzilla.redhat.com/show_bug.cgi?id=2309801 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-44969 – s390/sclp: Prevent release of buffer in I/O
https://notcve.org/view.php?id=CVE-2024-44969
In the Linux kernel, the following vulnerability has been resolved: s390/sclp: Prevent release of buffer in I/O When a task waiting for completion of a Store Data operation is interrupted, an attempt is made to halt this operation. If this attempt fails due to a hardware or firmware problem, there is a chance that the SCLP facility might store data into buffers referenced by the original operation at a later time. Handle this situation by not releasing the referenced data buffers if the halt attempt fails. For current use cases, this might result in a leak of few pages of memory in case of a rare hardware/firmware malfunction. • https://git.kernel.org/stable/c/7a7e60ed23d471a07dbbe72565d2992ee8244bbe https://git.kernel.org/stable/c/1ec5ea9e25f582fd6999393e2f2c3bf56f234e05 https://git.kernel.org/stable/c/a3e52a4c22c846858a6875e1c280030a3849e148 https://git.kernel.org/stable/c/a88a49473c94ccfd8dce1e766aacf3c627278463 https://git.kernel.org/stable/c/46f67233b011385d53cf14d272431755de3a7c79 https://git.kernel.org/stable/c/1e8b7fb427af6b2ddd54eff66a6b428a81c96633 https://git.kernel.org/stable/c/2429ea3b4330e3653b72b210a0d5f2a717359506 https://git.kernel.org/stable/c/bf365071ea92b9579d5a272679b74052a •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-44965 – x86/mm: Fix pti_clone_pgtable() alignment assumption
https://notcve.org/view.php?id=CVE-2024-44965
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pti_clone_pgtable() alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then #DF from the stack guard. It turned out that pti_clone_pgtable() had alignment assumptions on the start address, notably it hard assumes start is PMD aligned. This is true on x86_64, but very much not true on i386. These assumptions can cause the end condition to malfunction, leading to a 'short' clone. Guess what happens when the user mapping has a short copy of the entry text? Use the correct increment form for addr to avoid alignment assumptions. • https://git.kernel.org/stable/c/16a3fe634f6a568c6234b8747e5d50487fed3526 https://git.kernel.org/stable/c/18da1b27ce16a14a9b636af9232acb4fb24f4c9e https://git.kernel.org/stable/c/25a727233a40a9b33370eec9f0cad67d8fd312f8 https://git.kernel.org/stable/c/d00c9b4bbc442d99e1dafbdfdab848bc1ead73f6 https://git.kernel.org/stable/c/4d143ae782009b43b4f366402e5c37f59d4e4346 https://git.kernel.org/stable/c/5c580c1050bcbc15c3e78090859d798dcf8c9763 https://git.kernel.org/stable/c/ca07aab70dd3b5e7fddb62d7a6ecd7a7d6d0b2ed https://git.kernel.org/stable/c/df3eecb5496f87263d171b254ca6e2758 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-44963 – btrfs: do not BUG_ON() when freeing tree block after error
https://notcve.org/view.php?id=CVE-2024-44963
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON() when freeing tree block after error When freeing a tree block, at btrfs_free_tree_block(), if we fail to create a delayed reference we don't deal with the error and just do a BUG_ON(). The error most likely to happen is -ENOMEM, and we have a comment mentioning that only -ENOMEM can happen, but that is not true, because in case qgroups are enabled any error returned from btrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned from btrfs_search_slot() for example) can be propagated back to btrfs_free_tree_block(). So stop doing a BUG_ON() and return the error to the callers and make them abort the transaction to prevent leaking space. Syzbot was triggering this, likely due to memory allocation failure injection. • https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11 •