CVSS: 4.4EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26645 – tracing: Ensure visibility when inserting an element into tracing_map
https://notcve.org/view.php?id=CVE-2024-26645
In the Linux kernel, the following vulnerability has been resolved: tracing: Ensure visibility when inserting an element into tracing_map Running the following two commands in parallel on a multi-processor AArch64 machine can sporadically produce an unexpected warning about duplicate histogram entries: $ while true; do echo hist:key=id.syscall:val=hitcount > \ /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist sleep 0.001 done $ stress-ng --sysbadaddr $(nproc) The warning looks as follows: [ 2911.172474] ------------[ cut here ]------------ [ 2911.173111] Duplicates detected: 1 [ 2911.173574] WARNING: CPU: 2 PID: 12247 at kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408 [ 2911.174702] Modules linked in: iscsi_ibft(E) iscsi_boot_sysfs(E) rfkill(E) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) button(E) fuse(E) efi_pstore(E) ip_tables(E) x_tables(E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth(E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E) [ 2911.174738] Unloaded tainted modules: cppc_cpufreq(E):1 [ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: loaded Tainted: G E 6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01 [ 2911.182398] Hardware name: Amazon EC2 c7g.8xlarge/, BIOS 1.0 11/1/2018 [ 2911.183208] pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408 [ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408 [ 2911.185310] sp : ffff8000a1513900 [ 2911.185750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001 [ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 0000000000000008 [ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180 [ 2911.188310] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff [ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a15134b8 [ 2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731 [ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c [ 2911.191716] x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 000000000057ffa8 [ 2911.192554] x5 : ffff0012f6c24ec0 x4 : 0000000000000000 x3 : ffff2e5b72b5d000 [ 2911.193404] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0003ff254480 [ 2911.194259] Call trace: [ 2911.194626] tracing_map_sort_entries+0x3e0/0x408 [ 2911.195220] hist_show+0x124/0x800 [ 2911.195692] seq_read_iter+0x1d4/0x4e8 [ 2911.196193] seq_read+0xe8/0x138 [ 2911.196638] vfs_read+0xc8/0x300 [ 2911.197078] ksys_read+0x70/0x108 [ 2911.197534] __arm64_sys_read+0x24/0x38 [ 2911.198046] invoke_syscall+0x78/0x108 [ 2911.198553] el0_svc_common.constprop.0+0xd0/0xf8 [ 2911.199157] do_el0_svc+0x28/0x40 [ 2911.199613] el0_svc+0x40/0x178 [ 2911.200048] el0t_64_sync_handler+0x13c/0x158 [ 2911.200621] el0t_64_sync+0x1a8/0x1b0 [ 2911.201115] ---[ end trace 0000000000000000 ]--- The problem appears to be caused by CPU reordering of writes issued from __tracing_map_insert(). The check for the presence of an element with a given key in this function is: val = READ_ONCE(entry->val); if (val && keys_match(key, val->key, map->key_size)) ... The write of a new entry is: elt = get_free_elt(map); memcpy(elt->key, key, map->key_size); entry->val = elt; The "memcpy(elt->key, key, map->key_size);" and "entry->val = elt;" stores may become visible in the reversed order on another CPU. This second CPU might then incorrectly determine that a new key doesn't match an already present val->key and subse ---truncated--- En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo: garantiza la visibilidad al insertar un elemento en tracing_map La ejecución de los siguientes dos comandos en paralelo en una máquina multiprocesador AArch64 puede producir esporádicamente una advertencia inesperada sobre entradas de histograma duplicadas: $ while true ; hacer echo hist:key=id.syscall:val=hitcount > \ /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist sleep 0.001 done $ estrés-ng --sysbadaddr $(nproc) La advertencia tiene el siguiente aspecto: [ 2911.172474] ------------[ cortar aquí ]------------ [ 2911.173111] Duplicados detectados: 1 [2911.173574] ADVERTENCIA: CPU: 2 PID: 12247 en kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408 [2911.174702] Módulos vinculados en: iscsi_ibft(E) iscsi_boot_sy sfs(E) rfkill(E ) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) botón(E) fusible(E) efi_pstore(E) ip_tables(E) x_tables (E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E ) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth (E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E) [ 2911.174738] Módulos contaminados descargados: cppc_cpufreq(E):1 [ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: cargado Contaminado: GE 6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01 [2911.182398] Nombre de hardware: Amazon EC2 c7g.8xlarge/, BIOS 1.0 1/11/2018 [2911.183208] pstate: 6140 0005 (nZCv daif +PAN -UAO -TCO +DIT - SSBS BTYPE=--) [ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408 [ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408 [ 2911.185310] sp : ffff8000a1513900 [ 2911.18 5750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001 [ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 00000000000000008 [ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180 [ 2911.1883 10] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff [ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a151 34b8 [2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731 [ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c [ 2911.191716] x8 : 00 0000000017ffe8 x7: c0000000fffeffff x6: 000000000057ffa8 [2911.192554] x5: ffff0012f6c24ec0 x4: 00000000000000000 x3: ffff2e5b72b5d000 [2911.193 404] x2: 0000000000000000 x1: 0000000000000000 x0 : ffff0003ff254480 [2911.194259] Rastreo de llamadas: [2911.194626] tracing_map_sort_entries+0x3e0/0x408 [2911.195220] hist_show+0x124/0x800 [2911.195692] seq_read_iter+0x1d4 /0x4e8 [ 2911.196193] seq_read+0xe8/0x138 [ 2911.196638] vfs_read+0xc8/0x300 [ 2911.197078 ] ksys_read+0x70/0x108 [ 2911.197534] __arm64_sys_read+0x24/0x38 [ 2911.198046] invoke_syscall+0x78/0x108 [ 2911.198553] el0_svc_common.constprop.0+0xd0/0x f8 [ 2911.199157] do_el0_svc+0x28/0x40 [ 2911.199613] el0_svc+0x40/0x178 [ 2911.200048] el0t_64_sync_handler+0x13c/0x158 [ 2911.200621] el0t_64_sync+0x1a8/0x1b0 [ 2911.201115] ---[ end trace 0000000000000000 ]--- El problema parece deberse a la reordenación de la CPU de escrituras emitidas desde __tracing_map_insert(). La comprobación de la presencia de un elemento con una clave determinada en esta función es: val = READ_ONCE(entry->val); if (val && llaves_match(key, val->key, map->key_size)) ... La escritura de una nueva entrada es: elt = get_free_elt(map); memcpy(elt->clave, clave, mapa->key_size); entrada->val = elt; El "memcpy(elt->key, key, map->key_size);" y "entrada->val = elt;" Las tiendas pueden volverse visibles en orden inverso en otra CPU.---truncada--- • https://git.kernel.org/stable/c/c193707dde77ace92a649cd59a17e105e2fbeaef https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860 https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177 https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7 https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac941223 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2024-26644 – btrfs: don't abort filesystem when attempting to snapshot deleted subvolume
https://notcve.org/view.php?id=CVE-2024-26644
In the Linux kernel, the following vulnerability has been resolved: btrfs: don't abort filesystem when attempting to snapshot deleted subvolume If the source file descriptor to the snapshot ioctl refers to a deleted subvolume, we get the following abort: BTRFS: Transaction aborted (error -2) WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998 R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Call Trace: <TASK> ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? __warn+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? report_bug+0x171/0x1a0 ? • https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464 https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256 https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47180 – NFC: nci: fix memory leak in nci_allocate_device
https://notcve.org/view.php?id=CVE-2021-47180
In the Linux kernel, the following vulnerability has been resolved: NFC: nci: fix memory leak in nci_allocate_device nfcmrvl_disconnect fails to free the hci_dev field in struct nci_dev. Fix this by freeing hci_dev in nci_free_device. BUG: memory leak unreferenced object 0xffff888111ea6800 (size 1024): comm "kworker/1:0", pid 19, jiffies 4294942308 (age 13.580s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 60 fd 0c 81 88 ff ff .........`...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000004bc25d43>] kmalloc include/linux/slab.h:552 [inline] [<000000004bc25d43>] kzalloc include/linux/slab.h:682 [inline] [<000000004bc25d43>] nci_hci_allocate+0x21/0xd0 net/nfc/nci/hci.c:784 [<00000000c59cff92>] nci_allocate_device net/nfc/nci/core.c:1170 [inline] [<00000000c59cff92>] nci_allocate_device+0x10b/0x160 net/nfc/nci/core.c:1132 [<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0 drivers/nfc/nfcmrvl/main.c:153 [<000000004da1b57e>] nfcmrvl_probe+0x223/0x290 drivers/nfc/nfcmrvl/usb.c:345 [<00000000d506aed9>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554 [<00000000f5009125>] driver_probe_device+0x84/0x100 drivers/base/dd.c:740 [<000000000ce658ca>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846 [<000000007067d05f>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431 [<00000000f8e13372>] __device_attach+0x122/0x250 drivers/base/dd.c:914 [<000000009cf68860>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491 [<00000000359c965a>] device_add+0x5be/0xc30 drivers/base/core.c:3109 [<00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164 [<00000000ca036872>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<00000000d40d36f6>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<00000000bc632c92>] really_probe+0x159/0x4a0 drivers/base/dd.c:554 En el kernel de Linux, se resolvió la siguiente vulnerabilidad: NFC: nci: corrige la pérdida de memoria en nci_allocate_device nfcmrvl_disconnect no logra liberar el campo hci_dev en la estructura nci_dev. Solucione este problema liberando hci_dev en nci_free_device. ERROR: pérdida de memoria, objeto sin referencia 0xffff888111ea6800 (tamaño 1024): comunicación "kworker/1:0", pid 19, jiffies 4294942308 (edad 13.580 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 60 fd 0c 81 88 ff ff .........`...... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ............. ... seguimiento: [<000000004bc25d43>] kmalloc include/linux/slab.h:552 [en línea] [<000000004bc25d43>] kzalloc include/linux/slab.h:682 [en línea] [<000000004bc25d43>] nci_hci_allocate+0x21/ 0xd0 net/nfc/nci/hci.c:784 [<00000000c59cff92>] nci_allocate_device net/nfc/nci/core.c:1170 [en línea] [<00000000c59cff92>] nci_allocate_device+0x10b/0x160 net/nfc/nci/core. c:1132 [<00000000006e0a8e>] nfcmrvl_nci_register_dev+0x10a/0x1c0 controladores/nfc/nfcmrvl/main.c:153 [<000000004da1b57e>] nfcmrvl_probe+0x223/0x290 controladores/nfc/nfcmr vl/usb.c:345 [<00000000d506aed9>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<00000000bc632c92>] very_probe+0x159/0x4a0 drivers/base/dd.c:554 [<00000000f5009125>] driver_probe_device+0x84/0x100 drivers/base/dd .c:740 [<000000000ce658ca>] __device_attach_driver+0xee/0x110 controladores/base/dd.c:846 [<000000007067d05f>] bus_for_each_drv+0xb7/0x100 controladores/base/bus.c:431 [<00000000f8e1337 2>] __device_attach+0x122 /0x250 controladores/base/dd.c:914 [<000000009cf68860>] bus_probe_device+0xc6/0xe0 controladores/base/bus.c:491 [<00000000359c965a>] dispositivo_add+0x5be/0xc30 controladores/base/core.c:3109 [ <00000000086e4bd3>] usb_set_configuration+0x9d9/0xb90 controladores/usb/core/message.c:2164 [<00000000ca036872>] usb_generic_driver_probe+0x8c/0xc0 controladores/usb/core/generic.c:238 [<00000000d40d3 6f6>] dispositivo_probe_usb+0x5c/ 0x140 controladores/usb/core/driver.c:293 [<00000000bc632c92>] very_probe+0x159/0x4a0 controladores/base/dd.c:554 • https://git.kernel.org/stable/c/11f54f228643d0248ec00ce8c9fb8d872f87e7b8 https://git.kernel.org/stable/c/448a1cb12977f52142e6feb12022c59662d88dc1 https://git.kernel.org/stable/c/4a621621c7af3cec21c47c349b30cd9c3cea11c8 https://git.kernel.org/stable/c/2c2fb2df46ea866b49fea5ec7112ec3cd4896c74 https://git.kernel.org/stable/c/0365701bc44e078682ee1224866a71897495c7ef https://git.kernel.org/stable/c/af2a4426baf71163c0c354580ae98c7888a9aba7 https://git.kernel.org/stable/c/b34cb7ac32cc8e5471dc773180ea9ae676b1a745 https://git.kernel.org/stable/c/65234f50a90b64b335cbb9164b8a98c2a •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-47179 – NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
https://notcve.org/view.php?id=CVE-2021-47179
In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() Commit de144ff4234f changes _pnfs_return_layout() to call pnfs_mark_matching_lsegs_return() passing NULL as the struct pnfs_layout_range argument. Unfortunately, pnfs_mark_matching_lsegs_return() doesn't check if we have a value here before dereferencing it, causing an oops. I'm able to hit this crash consistently when running connectathon basic tests on NFS v4.1/v4.2 against Ontap. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4: corrige una desreferencia de puntero NULL en pnfs_mark_matching_lsegs_return(). Confirme los cambios de144ff4234f _pnfs_return_layout() para llamar a pnfs_mark_matching_lsegs_return() pasando NULL como argumento de estructura pnfs_layout_range. Desafortunadamente, pnfs_mark_matching_lsegs_return() no verifica si tenemos un valor aquí antes de eliminar la referencia a él, lo que provoca un error. • https://git.kernel.org/stable/c/80e34f4957ec3010c85f9bb0b568a8d46acdf535 https://git.kernel.org/stable/c/7b7b9774643220e53eef58c15bb29bd4182fe053 https://git.kernel.org/stable/c/9ffa7967f9379a0a1b924e9ffeda709d72237da7 https://git.kernel.org/stable/c/6be0e4b59314e4a836495f6ffdc5d2c5b079deeb https://git.kernel.org/stable/c/2fafe7d5047f98791afd9a1d90d2afb70debc590 https://git.kernel.org/stable/c/7e65ea887d0c0997f3053acd91a027af45e71c5b https://git.kernel.org/stable/c/96260bde1ea8ae31a5402fe506abbb8951d5a42c https://git.kernel.org/stable/c/4e1ba532dbc1a0e19fc2458d74ab8d986 • CWE-476: NULL Pointer Dereference •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2021-47177 – iommu/vt-d: Fix sysfs leak in alloc_iommu()
https://notcve.org/view.php?id=CVE-2021-47177
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix sysfs leak in alloc_iommu() iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent errors. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: iommu/vt-d: corrige la fuga de sysfs en alloc_iommu() iommu_device_sysfs_add() se llama antes, por lo que debe limpiarse en caso de errores posteriores. • https://git.kernel.org/stable/c/39ab9555c24110671f8dc671311a26e5c985b592 https://git.kernel.org/stable/c/22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8 https://git.kernel.org/stable/c/2ec5e9bb6b0560c90d315559c28a99723c80b996 https://git.kernel.org/stable/c/044bbe8b92ab4e542de7f6c93c88ea65cccd8e29 https://git.kernel.org/stable/c/f01134321d04f47c718bb41b799bcdeda27873d2 https://git.kernel.org/stable/c/ca466561eef36d1ec657673e3944eb6340bddb5b https://git.kernel.org/stable/c/0ee74d5a48635c848c20f152d0d488bf84641304 •