CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-50279 – dm cache: fix out-of-bounds access to the dirty bitset when resizing
https://notcve.org/view.php?id=CVE-2024-50279
In the Linux kernel, the following vulnerability has been resolved: dm cache: fix out-of-bounds access to the dirty bitset when resizing dm-cache checks the dirty bits of the cache blocks to be dropped when shrinking the fast device, but an index bug in bitset iteration causes out-of-bounds access. Reproduce steps: 1. create a cache device of 1024 cache blocks (128 bytes dirty bitset) dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 131072 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct dmsetup create cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" 2. shrink the fast device to 512 cache blocks, triggering out-of-bounds access to the dirty bitset (offset 0x80) dmsetup suspend cache dmsetup reload cdata --table "0 65536 linear /dev/sdc 8192" dmsetup resume cdata dmsetup resume cache KASAN reports: BUG: KASAN: vmalloc-out-of-bounds in cache_preresume+0x269/0x7b0 Read of size 8 at addr ffffc900000f3080 by task dmsetup/131 (...snip...) The buggy address belongs to the virtual mapping at [ffffc900000f3000, ffffc900000f5000) created by: cache_ctr+0x176a/0x35f0 (...snip...) Memory state around the buggy address: ffffc900000f2f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900000f3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc900000f3080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc900000f3100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900000f3180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 Fix by making the index post-incremented. • https://git.kernel.org/stable/c/f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 https://git.kernel.org/stable/c/4fa4feb873cea0e9d6ff883b37cca6f33169d8b4 https://git.kernel.org/stable/c/8501e38dc9e0060814c4085815fc83da3e6d43bf https://git.kernel.org/stable/c/ee1f74925717ab36f6a091104c170639501ce818 https://git.kernel.org/stable/c/ff1dd8a04c30e8d4e2fd5c83198ca672eb6a9e7f https://git.kernel.org/stable/c/56507203e1b6127967ec2b51fb0b23a0d4af1334 https://git.kernel.org/stable/c/e57648ce325fa405fe6bbd0e6a618ced7c301a2d https://git.kernel.org/stable/c/3b02c40ff10fdf83cc545850db208de85 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-50278 – dm cache: fix potential out-of-bounds access on the first resume
https://notcve.org/view.php?id=CVE-2024-50278
In the Linux kernel, the following vulnerability has been resolved: dm cache: fix potential out-of-bounds access on the first resume Out-of-bounds access occurs if the fast device is expanded unexpectedly before the first-time resume of the cache table. This happens because expanding the fast device requires reloading the cache table for cache_create to allocate new in-core data structures that fit the new size, and the check in cache_preresume is not performed during the first resume, leading to the issue. Reproduce steps: 1. prepare component devices: dmsetup create cmeta --table "0 8192 linear /dev/sdc 0" dmsetup create cdata --table "0 65536 linear /dev/sdc 8192" dmsetup create corig --table "0 524288 linear /dev/sdc 262144" dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct 2. load a cache table of 512 cache blocks, and deliberately expand the fast device before resuming the cache, making the in-core data structures inadequate. dmsetup create cache --notable dmsetup reload cache --table "0 524288 cache /dev/mapper/cmeta \ /dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0" dmsetup reload cdata --table "0 131072 linear /dev/sdc 8192" dmsetup resume cdata dmsetup resume cache 3. suspend the cache to write out the in-core dirty bitset and hint array, leading to out-of-bounds access to the dirty bitset at offset 0x40: dmsetup suspend cache KASAN reports: BUG: KASAN: vmalloc-out-of-bounds in is_dirty_callback+0x2b/0x80 Read of size 8 at addr ffffc90000085040 by task dmsetup/90 (...snip...) The buggy address belongs to the virtual mapping at [ffffc90000085000, ffffc90000087000) created by: cache_ctr+0x176a/0x35f0 (...snip...) Memory state around the buggy address: ffffc90000084f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90000084f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc90000085000: 00 00 00 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90000085080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90000085100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 Fix by checking the size change on the first resume. • https://git.kernel.org/stable/c/f494a9c6b1b6dd9a9f21bbb75d9210d478eeb498 https://git.kernel.org/stable/c/e492f71854ce03474d49e87fd98b8df1f7cd1d2d https://git.kernel.org/stable/c/2222b0929d00e2d13732b799b63be391b5de4492 https://git.kernel.org/stable/c/483b7261b35a9d369082ab298a6670912243f0be https://git.kernel.org/stable/c/fdef3b94dfebd57e3077a578b6e309a2bb6fa688 https://git.kernel.org/stable/c/c52ec00cb2f9bebfada22edcc0db385b910a1cdb https://git.kernel.org/stable/c/036dd6e3d2638103e0092864577ea1d091466b86 https://git.kernel.org/stable/c/13ed3624c6ef283acefa4cc42cc8ae54f •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-50277 – dm: fix a crash if blk_alloc_disk fails
https://notcve.org/view.php?id=CVE-2024-50277
In the Linux kernel, the following vulnerability has been resolved: dm: fix a crash if blk_alloc_disk fails If blk_alloc_disk fails, the variable md->disk is set to an error value. cleanup_mapped_device will see that md->disk is non-NULL and it will attempt to access it, causing a crash on this statement "md->disk->private_data = NULL;". • https://git.kernel.org/stable/c/d7aec2a06730b774a97caaf48cbbc58330a85829 https://git.kernel.org/stable/c/fed13a5478680614ba97fc87e71f16e2e197912e •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-50272 – filemap: Fix bounds checking in filemap_read()
https://notcve.org/view.php?id=CVE-2024-50272
In the Linux kernel, the following vulnerability has been resolved: filemap: Fix bounds checking in filemap_read() If the caller supplies an iocb->ki_pos value that is close to the filesystem upper limit, and an iterator with a count that causes us to overflow that limit, then filemap_read() enters an infinite loop. This behaviour was discovered when testing xfstests generic/525 with the "localio" optimisation for loopback NFS mounts. • https://git.kernel.org/stable/c/c2a9737f45e27d8263ff9643f994bda9bac0b944 https://git.kernel.org/stable/c/272830350bb1bb5bb39395966ea63b9864b135d1 https://git.kernel.org/stable/c/fbc7b803831e5c8a42c1f3427a17e55a814d6b3c https://git.kernel.org/stable/c/3d549dcfbbb0ecdaa571431a27ee5da9f2466716 https://git.kernel.org/stable/c/26530b757c81f1389fb33ae0357500150933161b https://git.kernel.org/stable/c/a2746ab3bbc9c6408da5cd072653ec8c24749235 https://git.kernel.org/stable/c/6450e73f4c86d481ac2e22e1bc848d346e140826 https://git.kernel.org/stable/c/ace149e0830c380ddfce7e466fe860ca5 •
CVSS: -EPSS: 0%CPEs: 11EXPL: 0CVE-2024-50269 – usb: musb: sunxi: Fix accessing an released usb phy
https://notcve.org/view.php?id=CVE-2024-50269
In the Linux kernel, the following vulnerability has been resolved: usb: musb: sunxi: Fix accessing an released usb phy Commit 6ed05c68cbca ("usb: musb: sunxi: Explicitly release USB PHY on exit") will cause that usb phy @glue->xceiv is accessed after released. 1) register platform driver @sunxi_musb_driver // get the usb phy @glue->xceiv sunxi_musb_probe() -> devm_usb_get_phy(). 2) register and unregister platform driver @musb_driver musb_probe() -> sunxi_musb_init() use the phy here //the phy is released here musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy() 3) register @musb_driver again musb_probe() -> sunxi_musb_init() use the phy here but the phy has been released at 2). ... Fixed by reverting the commit, namely, removing devm_usb_put_phy() from sunxi_musb_exit(). • https://git.kernel.org/stable/c/6ed05c68cbcae42cd52b8e53b66952bfa9c002ce https://git.kernel.org/stable/c/583a4219841d00e96b5de55be160aa7eb7721a4d https://git.kernel.org/stable/c/b4ecc15d6f5a13c0bbe2777438e87e321f83faaa https://git.kernel.org/stable/c/a2259ebaa933331c53904caf792b619ec42f0da5 https://git.kernel.org/stable/c/721ddad945596220c123eb6f7126729fe277ee4f https://git.kernel.org/stable/c/4aa77d5ea9944468e16c3eed15e858fd5de44de1 https://git.kernel.org/stable/c/6e2848d1c8c0139161e69ac0a94133e90e9988e8 https://git.kernel.org/stable/c/63559ba8077cbadae1c92a65b73ea522b •