CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2024-26757 – md: Don't ignore read-only array in md_check_recovery()
https://notcve.org/view.php?id=CVE-2024-26757
In the Linux kernel, the following vulnerability has been resolved: md: Don't ignore read-only array in md_check_recovery() Usually if the array is not read-write, md_check_recovery() won't register new sync_thread in the first place. And if the array is read-write and sync_thread is registered, md_set_readonly() will unregister sync_thread before setting the array read-only. md/raid follow this behavior hence there is no problem. After commit f52f5c71f3d4 ("md: fix stopping sync thread"), following hang can be triggered by test shell/integrity-caching.sh: 1) array is read-only. dm-raid update super block: rs_update_sbs ro = mddev->ro mddev->ro = 0 -> set array read-write md_update_sb 2) register new sync thread concurrently. 3) dm-raid set array back to read-only: rs_update_sbs mddev->ro = ro 4) stop the array: raid_dtr md_stop stop_sync_thread set_bit(MD_RECOVERY_INTR, &mddev->recovery); md_wakeup_thread_directly(mddev->sync_thread); wait_event(..., !test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) 5) sync thread done: md_do_sync set_bit(MD_RECOVERY_DONE, &mddev->recovery); md_wakeup_thread(mddev->thread); 6) daemon thread can't unregister sync thread: md_check_recovery if (!md_is_rdwr(mddev) && !test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) return; -> -> MD_RECOVERY_RUNNING can't be cleared, hence step 4 hang; The root cause is that dm-raid manipulate 'mddev->ro' by itself, however, dm-raid really should stop sync thread before setting the array read-only. • https://git.kernel.org/stable/c/ecbfb9f118bce49f571675929160e4ecef91cc8a https://git.kernel.org/stable/c/2ea169c5a0b1134d573d07fc27a16f327ad0e7d3 https://git.kernel.org/stable/c/55a48ad2db64737f7ffc0407634218cc6e4c513b https://access.redhat.com/security/cve/CVE-2024-26757 https://bugzilla.redhat.com/show_bug.cgi?id=2273208 • CWE-20: Improper Input Validation CWE-404: Improper Resource Shutdown or Release •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-26756 – md: Don't register sync_thread for reshape directly
https://notcve.org/view.php?id=CVE-2024-26756
In the Linux kernel, the following vulnerability has been resolved: md: Don't register sync_thread for reshape directly Currently, if reshape is interrupted, then reassemble the array will register sync_thread directly from pers->run(), in this case 'MD_RECOVERY_RUNNING' is set directly, however, there is no guarantee that md_do_sync() will be executed, hence stop_sync_thread() will hang because 'MD_RECOVERY_RUNNING' can't be cleared. Last patch make sure that md_do_sync() will set MD_RECOVERY_DONE, however, following hang can still be triggered by dm-raid test shell/lvconvert-raid-reshape.sh occasionally: [root@fedora ~]# cat /proc/1982/stack [<0>] stop_sync_thread+0x1ab/0x270 [md_mod] [<0>] md_frozen_sync_thread+0x5c/0xa0 [md_mod] [<0>] raid_presuspend+0x1e/0x70 [dm_raid] [<0>] dm_table_presuspend_targets+0x40/0xb0 [dm_mod] [<0>] __dm_destroy+0x2a5/0x310 [dm_mod] [<0>] dm_destroy+0x16/0x30 [dm_mod] [<0>] dev_remove+0x165/0x290 [dm_mod] [<0>] ctl_ioctl+0x4bb/0x7b0 [dm_mod] [<0>] dm_ctl_ioctl+0x11/0x20 [dm_mod] [<0>] vfs_ioctl+0x21/0x60 [<0>] __x64_sys_ioctl+0xb9/0xe0 [<0>] do_syscall_64+0xc6/0x230 [<0>] entry_SYSCALL_64_after_hwframe+0x6c/0x74 Meanwhile mddev->recovery is: MD_RECOVERY_RUNNING | MD_RECOVERY_INTR | MD_RECOVERY_RESHAPE | MD_RECOVERY_FROZEN Fix this problem by remove the code to register sync_thread directly from raid10 and raid5. And let md_check_recovery() to register sync_thread. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md: No registre sync_thread para remodelar directamente Actualmente, si se interrumpe el proceso de remodelación, volver a ensamblar la matriz registrará sync_thread directamente desde pers->run(), en este caso 'MD_RECOVERY_RUNNING ' se configura directamente, sin embargo, no hay garantía de que md_do_sync() se ejecute, por lo tanto, stop_sync_thread() se bloqueará porque 'MD_RECOVERY_RUNNING' no se puede borrar. En el último parche, asegúrese de que md_do_sync() establezca MD_RECOVERY_DONE; sin embargo, dm-raid test shell/lvconvert-raid-reshape.sh ocasionalmente puede activar el siguiente bloqueo: [root@fedora ~]# cat /proc/1982/stack [<0>] stop_sync_thread+0x1ab/0x270 [md_mod] [<0>] md_frozen_sync_thread+0x5c/0xa0 [md_mod] [<0>] raid_presuspend+0x1e/0x70 [dm_raid] [<0>] dm_table_presuspend_targets+0x40/0xb0 [ dm_mod] [<0>] __dm_destroy+0x2a5/0x310 [dm_mod] [<0>] dm_destroy+0x16/0x30 [dm_mod] [<0>] dev_remove+0x165/0x290 [dm_mod] [<0>] ctl_ioctl+0x4bb/ 0x7b0 [dm_mod] [<0>] dm_ctl_ioctl+0x11/0x20 [dm_mod] [<0>] vfs_ioctl+0x21/0x60 [<0>] __x64_sys_ioctl+0xb9/0xe0 [<0>] do_syscall_64+0xc6/0x230 [<0 >] Entry_SYSCALL_64_after_hwframe+0x6c/0x74 Mientras tanto mddev->recovery es: MD_RECOVERY_RUNNING | MD_RECOVERY_INTR | MD_RECOVERY_RESHAPE | MD_RECOVERY_FROZEN Solucione este problema eliminando el código para registrar sync_thread directamente desde raid10 y raid5. Y deje que md_check_recovery() registre sync_thread. • https://git.kernel.org/stable/c/f67055780caac6a99f43834795c43acf99eba6a6 https://git.kernel.org/stable/c/13b520fb62b772e408f9b79c5fe18ad414e90417 https://git.kernel.org/stable/c/ad39c08186f8a0f221337985036ba86731d6aafe •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26754 – gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp()
https://notcve.org/view.php?id=CVE-2024-26754
In the Linux kernel, the following vulnerability has been resolved: gtp: fix use-after-free and null-ptr-deref in gtp_genl_dump_pdp() The gtp_net_ops pernet operations structure for the subsystem must be registered before registering the generic netlink family. Syzkaller hit 'general protection fault in gtp_genl_dump_pdp' bug: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 5826 Comm: gtp Not tainted 6.8.0-rc3-std-def-alt1 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014 RIP: 0010:gtp_genl_dump_pdp+0x1be/0x800 [gtp] Code: c6 89 c6 e8 64 e9 86 df 58 45 85 f6 0f 85 4e 04 00 00 e8 c5 ee 86 df 48 8b 54 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 de 05 00 00 48 8b 44 24 18 4c 8b 30 4c 39 f0 74 RSP: 0018:ffff888014107220 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88800fcda588 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f1be4eb05c0(0000) GS:ffff88806ce80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1be4e766cf CR3: 000000000c33e000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? show_regs+0x90/0xa0 ? die_addr+0x50/0xd0 ? exc_general_protection+0x148/0x220 ? asm_exc_general_protection+0x22/0x30 ? • https://git.kernel.org/stable/c/459aa660eb1d8ce67080da1983bb81d716aa5a69 https://git.kernel.org/stable/c/f0ecdfa679189d26aedfe24212d4e69e42c2c861 https://git.kernel.org/stable/c/f8cbd1791900b5d96466eede8e9439a5b9ca4de7 https://git.kernel.org/stable/c/2e534fd15e5c2ca15821c897352cf0e8a3e30dca https://git.kernel.org/stable/c/a576308800be28f2eaa099e7caad093b97d66e77 https://git.kernel.org/stable/c/3963f16cc7643b461271989b712329520374ad2a https://git.kernel.org/stable/c/ba6b8b02a3314e62571a540efa96560888c5f03e https://git.kernel.org/stable/c/5013bd54d283eda5262c9ae3bcc966d01 •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-26744 – RDMA/srpt: Support specifying the srpt_service_guid parameter
https://notcve.org/view.php?id=CVE-2024-26744
In the Linux kernel, the following vulnerability has been resolved: RDMA/srpt: Support specifying the srpt_service_guid parameter Make loading ib_srpt with this parameter set work. The current behavior is that setting that parameter while loading the ib_srpt kernel module triggers the following kernel crash: BUG: kernel NULL pointer dereference, address: 0000000000000000 Call Trace: <TASK> parse_one+0x18c/0x1d0 parse_args+0xe1/0x230 load_module+0x8de/0xa60 init_module_from_file+0x8b/0xd0 idempotent_init_module+0x181/0x240 __x64_sys_finit_module+0x5a/0xb0 do_syscall_64+0x5f/0xe0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/srpt: admite la especificación del parámetro srpt_service_guid. Hace que la carga de ib_srpt con este conjunto de parámetros funcione. El comportamiento actual es que configurar ese parámetro mientras se carga el módulo del kernel ib_srpt desencadena el siguiente fallo del kernel: ERROR: desreferencia del puntero NULL del kernel, dirección: 0000000000000000 Seguimiento de llamadas: parse_one+0x18c/0x1d0 parse_args+0xe1/0x230 load_module+0x8de/ 0xa60 init_module_from_file+0x8b/0xd0 idempotent_init_module+0x181/0x240 __x64_sys_finit_module+0x5a/0xb0 do_syscall_64+0x5f/0xe0 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 A flaw was foundin the Linux Kernel when specifying the srpt_service_guid parameter, which may lead to kernel crash. • https://git.kernel.org/stable/c/a42d985bd5b234da8b61347a78dc3057bf7bb94d https://git.kernel.org/stable/c/84f1dac960cfa210a3b7a7522e6c2320ae91932b https://git.kernel.org/stable/c/5a5c039dac1b1b7ba3e91c791f4421052bf79b82 https://git.kernel.org/stable/c/989af2f29342a9a7c7515523d879b698ac8465f4 https://git.kernel.org/stable/c/aee4dcfe17219fe60f2821923adea98549060af8 https://git.kernel.org/stable/c/fe2a73d57319feab4b3b175945671ce43492172f https://git.kernel.org/stable/c/c99a827d3cff9f84e1cb997b7cc6386d107aa74d https://git.kernel.org/stable/c/fdfa083549de5d50ebf7f6811f3375778 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 6EXPL: 0CVE-2024-26733 – arp: Prevent overflow in arp_req_get().
https://notcve.org/view.php?id=CVE-2024-26733
In the Linux kernel, the following vulnerability has been resolved: arp: Prevent overflow in arp_req_get(). syzkaller reported an overflown write in arp_req_get(). [0] When ioctl(SIOCGARP) is issued, arp_req_get() looks up an neighbour entry and copies neigh->ha to struct arpreq.arp_ha.sa_data. The arp_ha here is struct sockaddr, not struct sockaddr_storage, so the sa_data buffer is just 14 bytes. In the splat below, 2 bytes are overflown to the next int field, arp_flags. We initialise the field just after the memcpy(), so it's not a problem. However, when dev->addr_len is greater than 22 (e.g. MAX_ADDR_LEN), arp_netmask is overwritten, which could be set as htonl(0xFFFFFFFFUL) in arp_ioctl() before calling arp_req_get(). To avoid the overflow, let's limit the max length of memcpy(). Note that commit b5f0de6df6dc ("net: dev: Convert sa_data to flexible array in struct sockaddr") just silenced syzkaller. [0]: memcpy: detected field-spanning write (size 16) of single field "r->arp_ha.sa_data" at net/ipv4/arp.c:1128 (size 14) WARNING: CPU: 0 PID: 144638 at net/ipv4/arp.c:1128 arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128 Modules linked in: CPU: 0 PID: 144638 Comm: syz-executor.4 Not tainted 6.1.74 #31 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014 RIP: 0010:arp_req_get+0x411/0x4a0 net/ipv4/arp.c:1128 Code: fd ff ff e8 41 42 de fb b9 0e 00 00 00 4c 89 fe 48 c7 c2 20 6d ab 87 48 c7 c7 80 6d ab 87 c6 05 25 af 72 04 01 e8 5f 8d ad fb <0f> 0b e9 6c fd ff ff e8 13 42 de fb be 03 00 00 00 4c 89 e7 e8 a6 RSP: 0018:ffffc900050b7998 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88803a815000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8641a44a RDI: 0000000000000001 RBP: ffffc900050b7a98 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 203a7970636d656d R12: ffff888039c54000 R13: 1ffff92000a16f37 R14: ffff88803a815084 R15: 0000000000000010 FS: 00007f172bf306c0(0000) GS:ffff88805aa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f172b3569f0 CR3: 0000000057f12005 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> arp_ioctl+0x33f/0x4b0 net/ipv4/arp.c:1261 inet_ioctl+0x314/0x3a0 net/ipv4/af_inet.c:981 sock_do_ioctl+0xdf/0x260 net/socket.c:1204 sock_ioctl+0x3ef/0x650 net/socket.c:1321 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x18e/0x220 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x64/0xce RIP: 0033:0x7f172b262b8d Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f172bf300b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f172b3abf80 RCX: 00007f172b262b8d RDX: 0000000020000000 RSI: 0000000000008954 RDI: 0000000000000003 RBP: 00007f172b2d3493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f172b3abf80 R15: 00007f172bf10000 </TASK> En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: arp: Evita el desbordamiento en arp_req_get(). syzkaller informó una escritura desbordada en arp_req_get(). [0] Cuando se emite ioctl(SIOCGARP), arp_req_get() busca una entrada vecina y copia neigh->ha para estructurar arpreq.arp_ha.sa_data. El arp_ha aquí es struct sockaddr, no struct sockaddr_storage, por lo que el búfer sa_data tiene solo 14 bytes. En el siguiente símbolo, se desbordan 2 bytes al siguiente campo int, arp_flags. • https://git.kernel.org/stable/c/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 https://git.kernel.org/stable/c/dbc9b22d0ed319b4e29034ce0a3fe32a3ee2c587 https://git.kernel.org/stable/c/97eaa2955db4120ce6ec2ef123e860bc32232c50 https://git.kernel.org/stable/c/f119f2325ba70cbfdec701000dcad4d88805d5b0 https://git.kernel.org/stable/c/a3f2c083cb575d80a7627baf3339e78fedccbb91 https://git.kernel.org/stable/c/3ab0d6f8289ba8402ca95a9fc61a34909d5e1f3a https://git.kernel.org/stable/c/a7d6027790acea24446ddd6632d394096c0f4667 https://lists.debian.org/debian-lts-announce/2024/06/ • CWE-122: Heap-based Buffer Overflow •