CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52797 – drivers: perf: Check find_first_bit() return value
https://notcve.org/view.php?id=CVE-2023-52797
In the Linux kernel, the following vulnerability has been resolved: drivers: perf: Check find_first_bit() return value We must check the return value of find_first_bit() before using the return value as an index array since it happens to overflow the array and then panic: [ 107.318430] Kernel BUG [#1] [ 107.319434] CPU: 3 PID: 1238 Comm: kill Tainted: G E 6.6.0-rc6ubuntu-defconfig #2 [ 107.319465] Hardware name: riscv-virtio,qemu (DT) [ 107.319551] epc : pmu_sbi_ovf_handler+0x3a4/0x3ae [ 107.319840] ra : pmu_sbi_ovf_handler+0x52/0x3ae [ 107.319868] epc : ffffffff80a0a77c ra : ffffffff80a0a42a sp : ffffaf83fecda350 [ 107.319884] gp : ffffffff823961a8 tp : ffffaf8083db1dc0 t0 : ffffaf83fecda480 [ 107.319899] t1 : ffffffff80cafe62 t2 : 000000000000ff00 s0 : ffffaf83fecda520 [ 107.319921] s1 : ffffaf83fecda380 a0 : 00000018fca29df0 a1 : ffffffffffffffff [ 107.319936] a2 : 0000000001073734 a3 : 0000000000000004 a4 : 0000000000000000 [ 107.319951] a5 : 0000000000000040 a6 : 000000001d1c8774 a7 : 0000000000504d55 [ 107.319965] s2 : ffffffff82451f10 s3 : ffffffff82724e70 s4 : 000000000000003f [ 107.319980] s5 : 0000000000000011 s6 : ffffaf8083db27c0 s7 : 0000000000000000 [ 107.319995] s8 : 0000000000000001 s9 : 00007fffb45d6558 s10: 00007fffb45d81a0 [ 107.320009] s11: ffffaf7ffff60000 t3 : 0000000000000004 t4 : 0000000000000000 [ 107.320023] t5 : ffffaf7f80000000 t6 : ffffaf8000000000 [ 107.320037] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003 [ 107.320081] [<ffffffff80a0a77c>] pmu_sbi_ovf_handler+0x3a4/0x3ae [ 107.320112] [<ffffffff800b42d0>] handle_percpu_devid_irq+0x9e/0x1a0 [ 107.320131] [<ffffffff800ad92c>] generic_handle_domain_irq+0x28/0x36 [ 107.320148] [<ffffffff8065f9f8>] riscv_intc_irq+0x36/0x4e [ 107.320166] [<ffffffff80caf4a0>] handle_riscv_irq+0x54/0x86 [ 107.320189] [<ffffffff80cb0036>] do_irq+0x64/0x96 [ 107.320271] Code: 85a6 855e b097 ff7f 80e7 9220 b709 9002 4501 bbd9 (9002) 6097 [ 107.320585] ---[ end trace 0000000000000000 ]--- [ 107.320704] Kernel panic - not syncing: Fatal exception in interrupt [ 107.320775] SMP: stopping secondary CPUs [ 107.321219] Kernel Offset: 0x0 from 0xffffffff80000000 [ 107.333051] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers: perf: Verifique el valor de retorno de find_first_bit(). Debemos verificar el valor de retorno de find_first_bit() antes de usar el valor de retorno como una matriz de índice ya que sucede que desborda la matriz y luego pánico: [107.318430] BUG del kernel [#1] [107.319434] CPU: 3 PID: 1238 Comm: kill Contaminado: GE 6.6.0-rc6ubuntu-defconfig #2 [ 107.319465] Nombre de hardware: riscv-virtio,qemu (DT) [ 107.319551] epc: pmu_sbi_ovf_handler+0x3a4/0x3ae [107.319840] ra: pmu_sbi_ovf_handler+0x52/0x3ae [107.319868] epc: ffffffff80a0a77c ra: ffffffff80a0a42a sp: 83fecda350 [ 107.319884] gp : ffffffff823961a8 tp : ffffaf8083db1dc0 t0 : ffffaf83fecda480 [ 107.319899] t1 : ffffffff80cafe62 t2 : 000000000000ff00 s0 : ffffaf83fecda520 [ 107.319921] s1 : ffffaf83fecda380 a0 : 00000018fca29df0 a1 : ffffffffffffffff [ 107.319936] a2 : 000000000107373 4 a3: 0000000000000004 a4: 0000000000000000 [107.319951] a5: 0000000000000040 a6: 000000001d1c8774 a7: 000000000504d55 [107.3199 65] s2: ffffffff82451f10 s3: ffffffff82724e70 s4: 000000000000003f [107.319980] s5: 0000000000000011 s6: ffffaf8083db27c0 s7: 00000000000000000 [107.319995] s8: 000000000000 0001 s9: 00007fffb45d6558 s10: 00007fffb45d81a0 [107.320009] s11: ffffaf7ffff60000 t3: 00000000000000004 t4: 0000000000000000 [ 107.320 023] t5: ffffaf7f80000000 t6: ffffaf8000000000 [107.320037 ] estado: 0000000200000100 badaddr: 00000000000000000 causa: 0000000000000003 [ 107.320081] [] pmu_sbi_ovf_handler+0x3a4/0x3ae [ 107.3201 12] [] handle_percpu_devid_irq+0x9e/0x1a0 [ 107.320131] [] generic_handle_domain_irq+0x28/0x36 [ 107.320148] [] riscv_intc_irq+0x36/0x4e [ 107.320166] [] handle_riscv_irq+0x54/0x86 [ 107.320189] [] _irq+0x64/0x96 [ 107.320271] Código: 85a6 855e b097 ff7f 80e7 9220 b709 9002 4501 bbd9 (9002) 6097 [107.320585] ---[ seguimiento final 0000000000000000 ]--- [ 107.320704] Pánico del kernel - no se sincroniza: excepción fatal en interrupción [ 107.320775] SMP: deteniendo CPU secundarias [ 107.32121 9]Compensación del kernel: 0x0 desde 0xffffffff80000000 [107.333051] ---[ fin del pánico del kernel - no se sincroniza: excepción fatal en la interrupción ]--- • https://git.kernel.org/stable/c/4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 https://git.kernel.org/stable/c/2c86b24095fcf72cf51bc72d12e4350163b4e11d https://git.kernel.org/stable/c/45a0de41ec383c8b7c6d442734ba3852dd2fc4a7 https://git.kernel.org/stable/c/c6e316ac05532febb0c966fa9b55f5258ed037be •
CVSS: 4.4EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52796 – ipvlan: add ipvlan_route_v6_outbound() helper
https://notcve.org/view.php?id=CVE-2023-52796
In the Linux kernel, the following vulnerability has been resolved: ipvlan: add ipvlan_route_v6_outbound() helper Inspired by syzbot reports using a stack of multiple ipvlan devices. Reduce stack size needed in ipvlan_process_v6_outbound() by moving the flowi6 struct used for the route lookup in an non inlined helper. ipvlan_route_v6_outbound() needs 120 bytes on the stack, immediately reclaimed. Also make sure ipvlan_process_v4_outbound() is not inlined. We might also have to lower MAX_NEST_DEV, because only syzbot uses setups with more than four stacked devices. BUG: TASK stack guard page was hit at ffffc9000e803ff8 (stack is ffffc9000e804000..ffffc9000e808000) stack guard page: 0000 [#1] SMP KASAN CPU: 0 PID: 13442 Comm: syz-executor.4 Not tainted 6.1.52-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:kasan_check_range+0x4/0x2a0 mm/kasan/generic.c:188 Code: 48 01 c6 48 89 c7 e8 db 4e c1 03 31 c0 5d c3 cc 0f 0b eb 02 0f 0b b8 ea ff ff ff 5d c3 cc 00 00 cc cc 00 00 cc cc 55 48 89 e5 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 a4 01 00 00 48 89 RSP: 0018:ffffc9000e804000 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817e5bf2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff887c6568 RBP: ffffc9000e804000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001d0080c R13: dffffc0000000000 R14: ffffffff87e6b100 R15: 0000000000000000 FS: 00007fd0c55826c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc9000e803ff8 CR3: 0000000170ef7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> [<ffffffff81f281d1>] __kasan_check_read+0x11/0x20 mm/kasan/shadow.c:31 [<ffffffff817e5bf2>] instrument_atomic_read include/linux/instrumented.h:72 [inline] [<ffffffff817e5bf2>] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] [<ffffffff817e5bf2>] cpumask_test_cpu include/linux/cpumask.h:506 [inline] [<ffffffff817e5bf2>] cpu_online include/linux/cpumask.h:1092 [inline] [<ffffffff817e5bf2>] trace_lock_acquire include/trace/events/lock.h:24 [inline] [<ffffffff817e5bf2>] lock_acquire+0xe2/0x590 kernel/locking/lockdep.c:5632 [<ffffffff8563221e>] rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:306 [<ffffffff8561464d>] rcu_read_lock include/linux/rcupdate.h:747 [inline] [<ffffffff8561464d>] ip6_pol_route+0x15d/0x1440 net/ipv6/route.c:2221 [<ffffffff85618120>] ip6_pol_route_output+0x50/0x80 net/ipv6/route.c:2606 [<ffffffff856f65b5>] pol_lookup_func include/net/ip6_fib.h:584 [inline] [<ffffffff856f65b5>] fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116 [<ffffffff85618009>] ip6_route_output_flags_noref+0x2d9/0x3a0 net/ipv6/route.c:2638 [<ffffffff8561821a>] ip6_route_output_flags+0xca/0x340 net/ipv6/route.c:2651 [<ffffffff838bd5a3>] ip6_route_output include/net/ip6_route.h:100 [inline] [<ffffffff838bd5a3>] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:473 [inline] [<ffffffff838bd5a3>] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline] [<ffffffff838bd5a3>] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline] [<ffffffff838bd5a3>] ipvlan_queue_xmit+0xc33/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677 [<ffffffff838c2909>] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229 [<ffffffff84d03900>] netdev_start_xmit include/linux/netdevice.h:4966 [inline] [<ffffffff84d03900>] xmit_one net/core/dev.c:3644 [inline] [<ffffffff84d03900>] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660 [<ffffffff84d080e2>] __dev_queue_xmit+0x16b2/0x3370 net/core/dev.c:4324 [<ffffffff855ce4cd>] dev_queue_xmit include/linux/netdevice.h:3067 [inline] [<ffffffff855ce4cd>] neigh_hh_output include/net/neighbour.h:529 [inline] [<f ---truncated--- En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ipvlan: agregue el asistente ipvlan_route_v6_outbound(). Inspirado en los informes de syzbot que utilizan una pila de múltiples dispositivos ipvlan. Reduzca el tamaño de pila necesario en ipvlan_process_v6_outbound() moviendo la estructura flowi6 utilizada para la búsqueda de rutas en un asistente no integrado. ipvlan_route_v6_outbound() necesita 120 bytes en la pila, que se recuperan inmediatamente. También asegúrese de que ipvlan_process_v4_outbound() no esté incluido. Es posible que también tengamos que reducir MAX_NEST_DEV, porque solo syzbot usa configuraciones con más de cuatro dispositivos apilados. • https://git.kernel.org/stable/c/2ad7bf3638411cb547f2823df08166c13ab04269 https://git.kernel.org/stable/c/4f7f850611aa27aaaf1bf5687702ad2240ae442a https://git.kernel.org/stable/c/4d2d30f0792b47908af64c4d02ed1ee25ff50542 https://git.kernel.org/stable/c/43b781e7cb5cd0b435de276111953bf2bacd1f02 https://git.kernel.org/stable/c/1f64cad3ac38ac5978b53c40e6c5e6fd3477c68f https://git.kernel.org/stable/c/732a67ca436887b594ebc43bb5a04ffb0971a760 https://git.kernel.org/stable/c/8872dc638c24bb774cd2224a69d72a7f661a4d56 https://git.kernel.org/stable/c/03cddc4df8c6be47fd27c8f8b87e5f9a9 • CWE-121: Stack-based Buffer Overflow •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52795 – vhost-vdpa: fix use after free in vhost_vdpa_probe()
https://notcve.org/view.php?id=CVE-2023-52795
In the Linux kernel, the following vulnerability has been resolved: vhost-vdpa: fix use after free in vhost_vdpa_probe() The put_device() calls vhost_vdpa_release_dev() which calls ida_simple_remove() and frees "v". So this call to ida_simple_remove() is a use after free and a double free. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: vhost-vdpa: corrige el use after free en vhost_vdpa_probe(). El put_device() llama a vhost_vdpa_release_dev() que llama a ida_simple_remove() y libera "v". Entonces esta llamada a ida_simple_remove() es un use after free y double free. • https://git.kernel.org/stable/c/ebe6a354fa7e0a7d5b581da31ad031b19d8693f9 https://git.kernel.org/stable/c/c0f8b8fb7df9d1a38652eb5aa817afccd3c56111 https://git.kernel.org/stable/c/ae8ea4e200675a940c365b496ef8e3fb4123601c https://git.kernel.org/stable/c/bf04132cd64ccde4e9e9765d489c83fe83c09b7f https://git.kernel.org/stable/c/e07754e0a1ea2d63fb29574253d1fd7405607343 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52792 – cxl/region: Do not try to cleanup after cxl_region_setup_targets() fails
https://notcve.org/view.php?id=CVE-2023-52792
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Do not try to cleanup after cxl_region_setup_targets() fails Commit 5e42bcbc3fef ("cxl/region: decrement ->nr_targets on error in cxl_region_attach()") tried to avoid 'eiw' initialization errors when ->nr_targets exceeded 16, by just decrementing ->nr_targets when cxl_region_setup_targets() failed. Commit 86987c766276 ("cxl/region: Cleanup target list on attach error") extended that cleanup to also clear cxled->pos and p->targets[pos]. The initialization error was incidentally fixed separately by: Commit 8d4285425714 ("cxl/region: Fix port setup uninitialized variable warnings") which was merged a few days after 5e42bcbc3fef. But now the original cleanup when cxl_region_setup_targets() fails prevents endpoint and switch decoder resources from being reused: 1) the cleanup does not set the decoder's region to NULL, which results in future dpa_size_store() calls returning -EBUSY 2) the decoder is not properly freed, which results in future commit errors associated with the upstream switch Now that the initialization errors were fixed separately, the proper cleanup for this case is to just return immediately. Then the resources associated with this target get cleanup up as normal when the failed region is deleted. The ->nr_targets decrement in the error case also helped prevent a p->targets[] array overflow, so add a new check to prevent against that overflow. Tested by trying to create an invalid region for a 2 switch * 2 endpoint topology, and then following up with creating a valid region. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: cxl/region: no intente realizar la limpieza después de que cxl_region_setup_targets() falle. Confirme 5e42bcbc3fef ("cxl/region: decrement ->nr_targets on error in cxl_region_attach()") intentó evitar ' Los mismos errores de inicialización cuando ->nr_targets excedieron 16, simplemente disminuyendo ->nr_targets cuando cxl_region_setup_targets() falló. • https://git.kernel.org/stable/c/5e42bcbc3fef6e759dfb4d3f4cfb394c382b4249 https://git.kernel.org/stable/c/90db4c1d5ebaf574d3c3065c055977982c378a83 https://git.kernel.org/stable/c/9090c5537c93cd0811ab7bfbd925b57addfffb60 https://git.kernel.org/stable/c/07ffcd8ec79cf7383e1e45815f4842fd357991c2 https://git.kernel.org/stable/c/0718588c7aaa7a1510b4de972370535b61dddd0d •
CVSS: 4.4EPSS: 0%CPEs: 7EXPL: 0CVE-2023-52791 – i2c: core: Run atomic i2c xfer when !preemptible
https://notcve.org/view.php?id=CVE-2023-52791
In the Linux kernel, the following vulnerability has been resolved: i2c: core: Run atomic i2c xfer when !preemptible Since bae1d3a05a8b, i2c transfers are non-atomic if preemption is disabled. However, non-atomic i2c transfers require preemption (e.g. in wait_for_completion() while waiting for the DMA). panic() calls preempt_disable_notrace() before calling emergency_restart(). Therefore, if an i2c device is used for the restart, the xfer should be atomic. This avoids warnings like: [ 12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0 [ 12.676926] Voluntary context switch within RCU read-side critical section! • https://git.kernel.org/stable/c/bae1d3a05a8b99bd748168bbf8155a1d047c562e https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809 https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0 https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1 https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91 https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37 • CWE-459: Incomplete Cleanup •