CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-53079 – mm/thp: fix deferred split unqueue naming and locking
https://notcve.org/view.php?id=CVE-2024-53079
In the Linux kernel, the following vulnerability has been resolved: mm/thp: fix deferred split unqueue naming and locking Recent changes are putting more pressure on THP deferred split queues: under load revealing long-standing races, causing list_del corruptions, "Bad page state"s and worse (I keep BUGs in both of those, so usually don't get to see how badly they end up without). The relevant recent changes being 6.8's mTHP, 6.10's mTHP swapout, and 6.12's mTHP swapin, improved swap allocation, and underused THP splitting. Before fixing locking: rename misleading folio_undo_large_rmappable(), which does not undo large_rmappable, to folio_unqueue_deferred_split(), which is what it does. But that and its out-of-line __callee are mm internals of very limited usability: add comment and WARN_ON_ONCEs to check usage; and return a bool to say if a deferred split was unqueued, which can then be used in WARN_ON_ONCEs around safety checks (sparing callers the arcane conditionals in __folio_unqueue_deferred_split()). Just omit the folio_unqueue_deferred_split() from free_unref_folios(), all of whose callers now call it beforehand (and if any forget then bad_page() will tell) - except for its caller put_pages_list(), which itself no longer has any callers (and will be deleted separately). Swapout: mem_cgroup_swapout() has been resetting folio->memcg_data 0 without checking and unqueueing a THP folio from deferred split list; which is unfortunate, since the split_queue_lock depends on the memcg (when memcg is enabled); so swapout has been unqueueing such THPs later, when freeing the folio, using the pgdat's lock instead: potentially corrupting the memcg's list. __remove_mapping() has frozen refcount to 0 here, so no problem with calling folio_unqueue_deferred_split() before resetting memcg_data. That goes back to 5.4 commit 87eaceb3faa5 ("mm: thp: make deferred split shrinker memcg aware"): which included a check on swapcache before adding to deferred queue, but no check on deferred queue before adding THP to swapcache. That worked fine with the usual sequence of events in reclaim (though there were a couple of rare ways in which a THP on deferred queue could have been swapped out), but 6.12 commit dafff3f4c850 ("mm: split underused THPs") avoids splitting underused THPs in reclaim, which makes swapcache THPs on deferred queue commonplace. Keep the check on swapcache before adding to deferred queue? • https://git.kernel.org/stable/c/87eaceb3faa59b9b4d940ec9554ce251325d83fe https://git.kernel.org/stable/c/fc4951c3e3358dd82ea508e893695b916c813f17 https://git.kernel.org/stable/c/afb1352d06b1b6b2cfd1f901c766a430c87078b3 https://git.kernel.org/stable/c/f8f931bba0f92052cf842b7e30917b1afcc77d5a •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-53066 – nfs: Fix KMSAN warning in decode_getfattr_attrs()
https://notcve.org/view.php?id=CVE-2024-53066
In the Linux kernel, the following vulnerability has been resolved: nfs: Fix KMSAN warning in decode_getfattr_attrs() Fix the following KMSAN warning: CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized. Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init(). • https://git.kernel.org/stable/c/88034c3d88c2c48b215f2cc5eb22e564aa817f9c https://git.kernel.org/stable/c/25ffd294fef81a7f3cd9528adf21560c04d98747 https://git.kernel.org/stable/c/bbfcd261cc068fe1cd02a4e871275074a0daa4e2 https://git.kernel.org/stable/c/8fc5ea9231af9122d227c9c13f5e578fca48d2e3 https://git.kernel.org/stable/c/9b453e8b108a5a93a6e348cf2ba4c9c138314a00 https://git.kernel.org/stable/c/f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b https://git.kernel.org/stable/c/f749cb60a01f8391c760a1d6ecd938cadacf9549 https://git.kernel.org/stable/c/9be0a21ae52b3b822d0eec4d14e909ab3 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-53063 – media: dvbdev: prevent the risk of out of memory access
https://notcve.org/view.php?id=CVE-2024-53063
In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: prevent the risk of out of memory access The dvbdev contains a static variable used to store dvb minors. The behavior of it depends if CONFIG_DVB_DYNAMIC_MINORS is set or not. When not set, dvb_register_device() won't check for boundaries, as it will rely that a previous call to dvb_register_adapter() would already be enforcing it. On a similar way, dvb_device_open() uses the assumption that the register functions already did the needed checks. This can be fragile if some device ends using different calls. This also generate warnings on static check analysers like Coverity. So, add explicit guards to prevent potential risk of OOM issues. • https://git.kernel.org/stable/c/5dd3f3071070f5a306bdf8d474c80062f5691cba https://git.kernel.org/stable/c/fedfde9deb83ac8d2f3d5f36f111023df34b1684 https://git.kernel.org/stable/c/3b88675e18b6517043a6f734eaa8ea6eb3bfa140 https://git.kernel.org/stable/c/a4a17210c03ade1c8d9a9f193a105654b7a05c11 https://git.kernel.org/stable/c/5f76f7df14861e3a560898fa41979ec92424b58f https://git.kernel.org/stable/c/b751a96025275c17f04083cbfe856822f1658946 https://git.kernel.org/stable/c/1e461672616b726f29261ee81bb991528818537c https://git.kernel.org/stable/c/9c17085fabbde2041c893d29599800f2d •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-53061 – media: s5p-jpeg: prevent buffer overflows
https://notcve.org/view.php?id=CVE-2024-53061
In the Linux kernel, the following vulnerability has been resolved: media: s5p-jpeg: prevent buffer overflows The current logic allows word to be less than 2. If this happens, there will be buffer overflows, as reported by smatch. Add extra checks to prevent it. While here, remove an unused word = 0 assignment. • https://git.kernel.org/stable/c/6c96dbbc2aa9f5b4aed8792989d69eae22bf77c4 https://git.kernel.org/stable/c/c5f6fefcda8fac8f082b6c5bf416567f4e100c51 https://git.kernel.org/stable/c/e5117f6e7adcf9fd7546cdd0edc9abe4474bc98b https://git.kernel.org/stable/c/f54e8e1e39dacccebcfb9a9a36f0552a0a97e2ef https://git.kernel.org/stable/c/a930cddfd153b5d4401df0c01effa14c831ff21e https://git.kernel.org/stable/c/c85db2d4432de4ff9d97006691ce2dcb5bda660e https://git.kernel.org/stable/c/784bc785a453eb2f8433dd62075befdfa1b2d6fd https://git.kernel.org/stable/c/c951a0859fdacf49a2298b5551a7e52b9 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-53060 – drm/amdgpu: prevent NULL pointer dereference if ATIF is not supported
https://notcve.org/view.php?id=CVE-2024-53060
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: prevent NULL pointer dereference if ATIF is not supported acpi_evaluate_object() may return AE_NOT_FOUND (failure), which would result in dereferencing buffer.pointer (obj) while being NULL. Although this case may be unrealistic for the current code, it is still better to protect against possible bugs. Bail out also when status is AE_NOT_FOUND. This fixes 1 FORWARD_NULL issue reported by Coverity Report: CID 1600951: Null pointer dereferences (FORWARD_NULL) (cherry picked from commit 91c9e221fe2553edf2db71627d8453f083de87a1) • https://git.kernel.org/stable/c/58556dcbd5606a5daccaee73b2130bc16b48e025 https://git.kernel.org/stable/c/43b4fa6e0e238c6e2662f4fb61d9f51c2785fb1d https://git.kernel.org/stable/c/234682910971732cd4da96fd95946e296e486b38 https://git.kernel.org/stable/c/6032287747f874b52dc8b9d7490e2799736e035f https://git.kernel.org/stable/c/cd67af3c1762de4c2483ae4dbdd98f9ea8fa56e3 https://git.kernel.org/stable/c/975ede2a7bec52b5da1428829b3439667c8a234b https://git.kernel.org/stable/c/1d7175f9c57b1abf9ecfbdfd53ea760761f52ffe https://git.kernel.org/stable/c/ce8a00a00e36f61f5a1e47734332420b6 •