CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-26727 – btrfs: do not ASSERT() if the newly created subvolume already got read
https://notcve.org/view.php?id=CVE-2024-26727
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not ASSERT() if the newly created subvolume already got read [BUG] There is a syzbot crash, triggered by the ASSERT() during subvolume creation: assertion failed: !anon_dev, in fs/btrfs/disk-io.c:1319 ------------[ cut here ]------------ kernel BUG at fs/btrfs/disk-io.c:1319! invalid opcode: 0000 [#1] PREEMPT SMP KASAN RIP: 0010:btrfs_get_root_ref.part.0+0x9aa/0xa60 <TASK> btrfs_get_new_fs_root+0xd3/0xf0 create_subvol+0xd02/0x1650 btrfs_mksubvol+0xe95/0x12b0 __btrfs_ioctl_snap_create+0x2f9/0x4f0 btrfs_ioctl_snap_create+0x16b/0x200 btrfs_ioctl+0x35f0/0x5cf0 __x64_sys_ioctl+0x19d/0x210 do_syscall_64+0x3f/0xe0 entry_SYSCALL_64_after_hwframe+0x63/0x6b ---[ end trace 0000000000000000 ]--- [CAUSE] During create_subvol(), after inserting root item for the newly created subvolume, we would trigger btrfs_get_new_fs_root() to get the btrfs_root of that subvolume. The idea here is, we have preallocated an anonymous device number for the subvolume, thus we can assign it to the new subvolume. But there is really nothing preventing things like backref walk to read the new subvolume. If that happens before we call btrfs_get_new_fs_root(), the subvolume would be read out, with a new anonymous device number assigned already. In that case, we would trigger ASSERT(), as we really expect no one to read out that subvolume (which is not yet accessible from the fs). But things like backref walk is still possible to trigger the read on the subvolume. Thus our assumption on the ASSERT() is not correct in the first place. [FIX] Fix it by removing the ASSERT(), and just free the @anon_dev, reset it to 0, and continue. If the subvolume tree is read out by something else, it should have already get a new anon_dev assigned thus we only need to free the preallocated one. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: btrfs: no haga ASSERT() si el subvolumen recién creado ya se leyó [ERROR] Hay un bloqueo del syzbot, provocado por ASSERT() durante la creación del subvolumen: la aserción falló: ! anon_dev, en fs/btrfs/disk-io.c:1319 ------------[ cortar aquí ]------------ ERROR del kernel en fs/btrfs/disk -io.c:1319! • https://git.kernel.org/stable/c/2dfb1e43f57dd3aeaa66f7cf05d068db2d4c8788 https://git.kernel.org/stable/c/917d608fe375041eb7f29befa6a6d7fd3cf32dde https://git.kernel.org/stable/c/3f5d47eb163bceb1b9e613c9003bae5fefc0046f https://git.kernel.org/stable/c/e31546b0f34af21738c4ceac47d662c00ee6382f https://git.kernel.org/stable/c/66b317a2fc45b2ef66527ee3f8fa08fb5beab88d https://git.kernel.org/stable/c/833775656d447c545133a744a0ed1e189ce61430 https://git.kernel.org/stable/c/5a172344bfdabb46458e03708735d7b1a918c468 https://git.kernel.org/stable/c/e03ee2fe873eb68c1f9ba5112fee70303 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26726 – btrfs: don't drop extent_map for free space inode on write error
https://notcve.org/view.php?id=CVE-2024-26726
In the Linux kernel, the following vulnerability has been resolved: btrfs: don't drop extent_map for free space inode on write error While running the CI for an unrelated change I hit the following panic with generic/648 on btrfs_holes_spacecache. assertion failed: block_start != EXTENT_MAP_HOLE, in fs/btrfs/extent_io.c:1385 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent_io.c:1385! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 2695096 Comm: fsstress Kdump: loaded Tainted: G W 6.8.0-rc2+ #1 RIP: 0010:__extent_writepage_io.constprop.0+0x4c1/0x5c0 Call Trace: <TASK> extent_write_cache_pages+0x2ac/0x8f0 extent_writepages+0x87/0x110 do_writepages+0xd5/0x1f0 filemap_fdatawrite_wbc+0x63/0x90 __filemap_fdatawrite_range+0x5c/0x80 btrfs_fdatawrite_range+0x1f/0x50 btrfs_write_out_cache+0x507/0x560 btrfs_write_dirty_block_groups+0x32a/0x420 commit_cowonly_roots+0x21b/0x290 btrfs_commit_transaction+0x813/0x1360 btrfs_sync_file+0x51a/0x640 __x64_sys_fdatasync+0x52/0x90 do_syscall_64+0x9c/0x190 entry_SYSCALL_64_after_hwframe+0x6e/0x76 This happens because we fail to write out the free space cache in one instance, come back around and attempt to write it again. However on the second pass through we go to call btrfs_get_extent() on the inode to get the extent mapping. Because this is a new block group, and with the free space inode we always search the commit root to avoid deadlocking with the tree, we find nothing and return a EXTENT_MAP_HOLE for the requested range. This happens because the first time we try to write the space cache out we hit an error, and on an error we drop the extent mapping. • https://git.kernel.org/stable/c/02f2b95b00bf57d20320ee168b30fb7f3db8e555 https://git.kernel.org/stable/c/7bddf18f474f166c19f91b2baf67bf7c5eda03f7 https://git.kernel.org/stable/c/a4b7741c8302e28073bfc6dd1c2e73598e5e535e https://git.kernel.org/stable/c/5571e41ec6e56e35f34ae9f5b3a335ef510e0ade •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26722 – ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()
https://notcve.org/view.php?id=CVE-2024-26722
In the Linux kernel, the following vulnerability has been resolved: ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work() There is a path in rt5645_jack_detect_work(), where rt5645->jd_mutex is left locked forever. That may lead to deadlock when rt5645_jack_detect_work() is called for the second time. Found by Linux Verification Center (linuxtesting.org) with SVACE. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: rt5645: corrige el punto muerto en rt5645_jack_detect_work() Hay una ruta en rt5645_jack_detect_work(), donde rt5645->jd_mutex queda bloqueado para siempre. Eso puede provocar un punto muerto cuando se llama a rt5645_jack_detect_work() por segunda vez. Encontrado por el Centro de verificación de Linux (linuxtesting.org) con SVACE. • https://git.kernel.org/stable/c/48ce529c83522944f116f03884819051f44f0fb6 https://git.kernel.org/stable/c/b67005b284ddaf62043468d1ce5905c17d85b0e6 https://git.kernel.org/stable/c/ffe13302b8fd486f80c98019bdcb7f3e512d0eda https://git.kernel.org/stable/c/7a3ff8a2bb2620ba6a806f0967c38be1a8d306d9 https://git.kernel.org/stable/c/1613195bf31e68b192bc731bea71726773e3482f https://git.kernel.org/stable/c/8f82f2e4d9c4966282e494ae67b0bc05a6c2b904 https://git.kernel.org/stable/c/cdba4301adda7c60a2064bf808e48fccd352aaa9 https://git.kernel.org/stable/c/3dd2d99e2352903d0e0b8769e6c9b8293 •
CVSS: 5.5EPSS: 0%CPEs: 18EXPL: 0CVE-2024-26720 – mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again
https://notcve.org/view.php?id=CVE-2024-26720
In the Linux kernel, the following vulnerability has been resolved: mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again (struct dirty_throttle_control *)->thresh is an unsigned long, but is passed as the u32 divisor argument to div_u64(). On architectures where unsigned long is 64 bytes, the argument will be implicitly truncated. Use div64_u64() instead of div_u64() so that the value used in the "is this a safe division" check is the same as the divisor. Also, remove redundant cast of the numerator to u64, as that should happen implicitly. This would be difficult to exploit in memcg domain, given the ratio-based arithmetic domain_drity_limits() uses, but is much easier in global writeback domain with a BDI_CAP_STRICTLIMIT-backing device, using e.g. vm.dirty_bytes=(1<<32)*PAGE_SIZE so that dtc->thresh == (1<<32) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: mm/writeback: corrige la posible división por cero en wb_dirty_limits(), nuevamente (struct dirty_throttle_control *)->thresh es un largo sin firmar, pero se pasa como argumento del divisor u32 a div_u64(). En arquitecturas donde la longitud sin firmar es de 64 bytes, el argumento se truncará implícitamente. Utilice div64_u64() en lugar de div_u64() para que el valor utilizado en la comprobación "¿Es esta una división segura" sea el mismo que el divisor? Además, elimine la conversión redundante del numerador a u64, ya que eso debería suceder implícitamente. • https://git.kernel.org/stable/c/f6789593d5cea42a4ecb1cbeab6a23ade5ebbba7 https://git.kernel.org/stable/c/c5fec566bef6a027e75c84c35ec970482eb88cea https://git.kernel.org/stable/c/c05d1fe6c19f4df2f0b8cba151a8f0c53b87d878 https://git.kernel.org/stable/c/3f7d325fbbe12e5ade71a1f90759c06ed2d27e3c https://git.kernel.org/stable/c/c593d26fb5d577ef31b6e49a31e08ae3ebc1bc1e https://git.kernel.org/stable/c/253f9ea7e8e53a5176bd80ceb174907b10724c1a https://git.kernel.org/stable/c/1f12e4b3284d6c863f272eb2de0d4248ed211cf4 https://git.kernel.org/stable/c/23a28f5f3f6ca1e4184bd0e9631cd0944 • CWE-369: Divide By Zero •
CVSS: 4.4EPSS: 0%CPEs: 3EXPL: 0CVE-2024-26719 – nouveau: offload fence uevents work to workqueue
https://notcve.org/view.php?id=CVE-2024-26719
In the Linux kernel, the following vulnerability has been resolved: nouveau: offload fence uevents work to workqueue This should break the deadlock between the fctx lock and the irq lock. This offloads the processing off the work from the irq into a workqueue. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nuevo: descargar valla uevents work to workqueue Esto debería romper el punto muerto entre el bloqueo fctx y el bloqueo irq. Esto descarga el procesamiento del trabajo del irq a una cola de trabajo. • https://git.kernel.org/stable/c/cc0037fa592d56e4abb9c7d1c52c4d2dc25cd906 https://git.kernel.org/stable/c/985d053f7633d8b539ab1531738d538efac678a9 https://git.kernel.org/stable/c/39126abc5e20611579602f03b66627d7cd1422f0 https://access.redhat.com/security/cve/CVE-2024-26719 https://bugzilla.redhat.com/show_bug.cgi?id=2273143 • CWE-833: Deadlock •