CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48628 – ceph: drop messages from MDS when unmounting
https://notcve.org/view.php?id=CVE-2022-48628
In the Linux kernel, the following vulnerability has been resolved: ceph: drop messages from MDS when unmounting When unmounting all the dirty buffers will be flushed and after the last osd request is finished the last reference of the i_count will be released. Then it will flush the dirty cap/snap to MDSs, and the unmounting won't wait the possible acks, which will ihold the inodes when updating the metadata locally but makes no sense any more, of this. This will make the evict_inodes() to skip these inodes. If encrypt is enabled the kernel generate a warning when removing the encrypt keys when the skipped inodes still hold the keyring: WARNING: CPU: 4 PID: 168846 at fs/crypto/keyring.c:242 fscrypt_destroy_keyring+0x7e/0xd0 CPU: 4 PID: 168846 Comm: umount Tainted: G S 6.1.0-rc5-ceph-g72ead199864c #1 Hardware name: Supermicro SYS-5018R-WR/X10SRW-F, BIOS 2.0 12/17/2015 RIP: 0010:fscrypt_destroy_keyring+0x7e/0xd0 RSP: 0018:ffffc9000b277e28 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff88810d52ac00 RCX: ffff88810b56aa00 RDX: 0000000080000000 RSI: ffffffff822f3a09 RDI: ffff888108f59000 RBP: ffff8881d394fb88 R08: 0000000000000028 R09: 0000000000000000 R10: 0000000000000001 R11: 11ff4fe6834fcd91 R12: ffff8881d394fc40 R13: ffff888108f59000 R14: ffff8881d394f800 R15: 0000000000000000 FS: 00007fd83f6f1080(0000) GS:ffff88885fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f918d417000 CR3: 000000017f89a005 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> generic_shutdown_super+0x47/0x120 kill_anon_super+0x14/0x30 ceph_kill_sb+0x36/0x90 [ceph] deactivate_locked_super+0x29/0x60 cleanup_mnt+0xb8/0x140 task_work_run+0x67/0xb0 exit_to_user_mode_prepare+0x23d/0x240 syscall_exit_to_user_mode+0x25/0x60 do_syscall_64+0x40/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd83dc39e9b Later the kernel will crash when iput() the inodes and dereferencing the "sb->s_master_keys", which has been released by the generic_shutdown_super(). • https://git.kernel.org/stable/c/89744b64914426cbabceb3d8a149176b5dafdfb5 https://git.kernel.org/stable/c/47f82395f04a976d4fa97de7f2acffa1c1096571 https://git.kernel.org/stable/c/e3dfcab2080dc1f9a4b09cc1327361bc2845bfcd •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26621 – mm: huge_memory: don't force huge page alignment on 32 bit
https://notcve.org/view.php?id=CVE-2024-26621
In the Linux kernel, the following vulnerability has been resolved: mm: huge_memory: don't force huge page alignment on 32 bit commit efa7df3e3bb5 ("mm: align larger anonymous mappings on THP boundaries") caused two issues [1] [2] reported on 32 bit system or compat userspace. It doesn't make too much sense to force huge page alignment on 32 bit system due to the constrained virtual address space. [1] https://lore.kernel.org/linux-mm/d0a136a0-4a31-46bc-adf4-2db109a61672@kernel.org/ [2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD-sQ@mail.gmail.com/ En el kernel de Linux, se resolvió la siguiente vulnerabilidad: mm: huge_memory: no forzar una alineación de página enorme en el commit de 32 bits efa7df3e3bb5 ("mm: alinear asignaciones anónimas más grandes en los límites de THP") causó dos problemas [1] [2] informado en un sistema de 32 bits o espacio de usuario compatible. No tiene mucho sentido forzar una gran alineación de páginas en un sistema de 32 bits debido al espacio limitado de direcciones virtuales. [1] https://lore.kernel.org/linux-mm/d0a136a0-4a31-46bc-adf4-2db109a61672@kernel.org/ [2] https://lore.kernel.org/linux-mm/CAJuCfpHXLdQy1a2B6xN2d7quTYwg2OoZseYPZTRpU0eHHKD- sQ@mail.gmail.com/ • https://git.kernel.org/stable/c/1854bc6e2420472676c5c90d3d6b15f6cd640e40 https://git.kernel.org/stable/c/87632bc9ecff5ded93433bc0fca428019bdd1cfe https://git.kernel.org/stable/c/6ea9aa8d97e6563676094cb35755884173269555 https://git.kernel.org/stable/c/7432376c913381c5f24d373a87ff629bbde94b47 https://git.kernel.org/stable/c/4ef9ad19e17676b9ef071309bc62020e2373705d http://www.openwall.com/lists/oss-security/2024/07/08/3 http://www.openwall.com/lists/oss-security/2024/07/08/4 http://www.openwall.com/lists/oss-security/2024/07&# •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26620 – s390/vfio-ap: always filter entire AP matrix
https://notcve.org/view.php?id=CVE-2024-26620
In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: always filter entire AP matrix The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID will be filtered from the mdev's matrix when updating the guest's AP configuration. Inspecting only the APID of the new adapter or APQI of the new domain will result in passing AP queues through to a guest that are not bound to the vfio_ap device driver under certain circumstances. Consider the following: guest's AP configuration (all also assigned to the mdev's matrix): 14.0004 14.0005 14.0006 16.0004 16.0005 16.0006 unassign domain 4 unbind queue 16.0005 assign domain 4 When domain 4 is re-assigned, since only domain 4 will be inspected, the APQNs that will be examined will be: 14.0004 16.0004 Since both of those APQNs reference queue devices that are bound to the vfio_ap device driver, nothing will get filtered from the mdev's matrix when updating the guest's AP configuration. • https://git.kernel.org/stable/c/48cae940c31d2407d860d87c41d5f9871c0521db https://git.kernel.org/stable/c/d6b8d034b576f406af920a7bee81606c027b24c6 https://git.kernel.org/stable/c/c69d821197611678533fb3eb784fc823b921349a https://git.kernel.org/stable/c/cdd134d56138302976685e6c7bc4755450b3880e https://git.kernel.org/stable/c/850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11 •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-26618 – arm64/sme: Always exit sme_alloc() early with existing storage
https://notcve.org/view.php?id=CVE-2024-26618
In the Linux kernel, the following vulnerability has been resolved: arm64/sme: Always exit sme_alloc() early with existing storage When sme_alloc() is called with existing storage and we are not flushing we will always allocate new storage, both leaking the existing storage and corrupting the state. Fix this by separating the checks for flushing and for existing storage as we do for SVE. Callers that reallocate (eg, due to changing the vector length) should call sme_free() themselves. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64/sme: salir siempre de sme_alloc() antes de tiempo con el almacenamiento existente. Cuando se llama a sme_alloc() con el almacenamiento existente y no estamos vaciando, siempre asignaremos nuevo almacenamiento, y ambos filtrarán el almacenamiento existente, almacenamiento y corrupción del estado. Solucione este problema separando los controles de descarga y de almacenamiento existente como lo hacemos con SVE. • https://git.kernel.org/stable/c/5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b https://git.kernel.org/stable/c/21614ba60883eb93b99a7ee4b41cb927f93b39ae https://git.kernel.org/stable/c/e01af8e26c23a08625a3dd6c8c472a1752d76cce https://git.kernel.org/stable/c/569156e4fa347237f8fa2a7e935d860109c55ac4 https://git.kernel.org/stable/c/814af6b4e6000e574e74d92197190edf07cc3680 https://git.kernel.org/stable/c/dc7eb8755797ed41a0d1b5c0c39df3c8f401b3d9 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-26616 – btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned
https://notcve.org/view.php?id=CVE-2024-26616
In the Linux kernel, the following vulnerability has been resolved: btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned [BUG] There is a bug report that, on a ext4-converted btrfs, scrub leads to various problems, including: - "unable to find chunk map" errors BTRFS info (device vdb): scrub: started on devid 1 BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 4096 BTRFS critical (device vdb): unable to find chunk map for logical 2214744064 length 45056 This would lead to unrepariable errors. - Use-after-free KASAN reports: ================================================================== BUG: KASAN: slab-use-after-free in __blk_rq_map_sg+0x18f/0x7c0 Read of size 8 at addr ffff8881013c9040 by task btrfs/909 CPU: 0 PID: 909 Comm: btrfs Not tainted 6.7.0-x64v3-dbg #11 c50636e9419a8354555555245df535e380563b2b Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 2023.11-2 12/24/2023 Call Trace: <TASK> dump_stack_lvl+0x43/0x60 print_report+0xcf/0x640 kasan_report+0xa6/0xd0 __blk_rq_map_sg+0x18f/0x7c0 virtblk_prep_rq.isra.0+0x215/0x6a0 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff] virtio_queue_rqs+0xc4/0x310 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff] blk_mq_flush_plug_list.part.0+0x780/0x860 __blk_flush_plug+0x1ba/0x220 blk_finish_plug+0x3b/0x60 submit_initial_group_read+0x10a/0x290 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] flush_scrub_stripes+0x38e/0x430 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_stripe+0x82a/0xae0 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_chunk+0x178/0x200 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] scrub_enumerate_chunks+0x4bc/0xa30 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btrfs_scrub_dev+0x398/0x810 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btrfs_ioctl+0x4b9/0x3020 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] __x64_sys_ioctl+0xbd/0x100 do_syscall_64+0x5d/0xe0 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f47e5e0952b - Crash, mostly due to above use-after-free [CAUSE] The converted fs has the following data chunk layout: item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 2214658048) itemoff 16025 itemsize 80 length 86016 owner 2 stripe_len 65536 type DATA|single For above logical bytenr 2214744064, it's at the chunk end (2214658048 + 86016 = 2214744064). This means btrfs_submit_bio() would split the bio, and trigger endio function for both of the two halves. However scrub_submit_initial_read() would only expect the endio function to be called once, not any more. This means the first endio function would already free the bbio::bio, leaving the bvec freed, thus the 2nd endio call would lead to use-after-free. [FIX] - Make sure scrub_read_endio() only updates bits in its range Since we may read less than 64K at the end of the chunk, we should not touch the bits beyond chunk boundary. - Make sure scrub_submit_initial_read() only to read the chunk range This is done by calculating the real number of sectors we need to read, and add sector-by-sector to the bio. Thankfully the scrub read repair path won't need extra fixes: - scrub_stripe_submit_repair_read() With above fixes, we won't update error bit for range beyond chunk, thus scrub_stripe_submit_repair_read() should never submit any read beyond the chunk. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: limpieza: evita el use-after-free cuando la longitud del fragmento no está alineada con 64 K [ERROR] Hay un informe de error que indica que, en un btrfs convertido a ext4, la limpieza conduce a varios problemas, que incluyen: - Errores "no se puede encontrar el mapa de fragmentos" Información BTRFS (dispositivo vdb): limpieza: iniciado en el devid 1 BTRFS crítico (dispositivo vdb): no se puede encontrar el mapa de fragmentos para la longitud lógica 2214744064 4096 BTRFS crítico (dispositivo vdb): No se puede encontrar el mapa de fragmentos para la longitud lógica 2214744064 45056. Esto provocaría errores irreparables. - Informes KASAN de uso gratuito: =========================================== ========================= ERROR: KASAN: slab-use-after-free en __blk_rq_map_sg+0x18f/0x7c0 Lectura de tamaño 8 en la dirección ffff8881013c9040 por tarea btrfs/909 CPU: 0 PID: 909 Comm: btrfs Not tainted 6.7.0-x64v3-dbg #11 c50636e9419a8354555555245df535e380563b2b Nombre de hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS 2023.11-2 24/12/2023 Seguimiento de llamadas : dump_stack_lvl+0x43/0x60 print_report+0xcf/0x640 kasan_report+0xa6/0xd0 __blk_rq_map_sg+0x18f/0x7c0 virtblk_prep_rq.isra.0+0x215/0x6a0 [virtio_blk 19a65eeee9ae6fcf02ed fad39bb9ddee07dcdaff] virtio_queue_rqs+0xc4/0x310 [virtio_blk 19a65eeee9ae6fcf02edfad39bb9ddee07dcdaff] blk_mq_flush_plug_list.part. 0+0x780/0x860 __blk_flush_plug+0x1ba/0x220 blk_finish_plug+0x3b/0x60 submit_initial_group_read+0x10a/0x290 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] Flush_scrub_stripes+0x38 e/0x430 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] Scrub_stripe+0x82a/0xae0 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] Scrub_chunk+0x178/0x200 [btrfs e579 87a360cama82fe8756dcd3e0de5406ccfe965 ] Scrub_enumerate_chunks+0x4bc/0xa30 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btrfs_scrub_dev+0x398/0x810 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] btr fs_ioctl+0x4b9/0x3020 [btrfs e57987a360bed82fe8756dcd3e0de5406ccfe965] __x64_sys_ioctl+0xbd/0x100 do_syscall_64+0x5d/0xe0 Entry_SYSCALL_64_after_hwframe+0x63/0x6b QEPD: 0033:0x7f47e5e0952b - Fallo , principalmente debido al use-after-free anterior [CAUSA] El fs convertido tiene el siguiente diseño de fragmento de datos: clave del elemento 2 (FIRST_CHUNK_TREE CHUNK_ITEM 2214658048) itemoff 16025 tamaño del elemento 80 longitud 86016 propietario 2 stripe_len 65536 tipo DATOS|single Para el bytenr lógico anterior 2214744064 , está al final del fragmento (2214658048 + 86016 = 2214744064). Esto significa que btrfs_submit_bio() dividiría la biografía y activaría la función endio para ambas mitades. Sin embargo, Scrub_submit_initial_read() solo esperaría que la función endio se llamara una vez, ya no. • https://git.kernel.org/stable/c/e02ee89baa66c40e1002cf8b09141fce7265e0f5 https://git.kernel.org/stable/c/642b9c520ef2f104277ad1f902f8526edbe087fb https://git.kernel.org/stable/c/34de0f04684ec00c093a0455648be055f0e8e24f https://git.kernel.org/stable/c/f546c4282673497a06ecb6190b50ae7f6c85b02f •