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nvd-json-data-feeds/CVE-2022/CVE-2022-487xx/CVE-2022-48795.json
cad-safe-bot e6cbafdc40 Auto-Update: 2024-12-08T03:00:18.988682+00:00
2024-12-08 03:06:42 +00:00

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{
"id": "CVE-2022-48795",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-07-16T12:15:04.220",
"lastModified": "2024-11-21T07:34:02.450",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Fix data TLB miss in sba_unmap_sg\n\nRolf Eike Beer reported the following bug:\n\n[1274934.746891] Bad Address (null pointer deref?): Code=15 (Data TLB miss fault) at addr 0000004140000018\n[1274934.746891] CPU: 3 PID: 5549 Comm: cmake Not tainted 5.15.4-gentoo-parisc64 #4\n[1274934.746891] Hardware name: 9000/785/C8000\n[1274934.746891]\n[1274934.746891] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI\n[1274934.746891] PSW: 00001000000001001111111000001110 Not tainted\n[1274934.746891] r00-03 000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000\n[1274934.746891] r04-07 0000000040b693c0 0000004140000000 000000004a2b08b0 0000000000000001\n[1274934.746891] r08-11 0000000041f98810 0000000000000000 000000004a0a7000 0000000000000001\n[1274934.746891] r12-15 0000000040bddbc0 0000000040c0cbc0 0000000040bddbc0 0000000040bddbc0\n[1274934.746891] r16-19 0000000040bde3c0 0000000040bddbc0 0000000040bde3c0 0000000000000007\n[1274934.746891] r20-23 0000000000000006 000000004a368950 0000000000000000 0000000000000001\n[1274934.746891] r24-27 0000000000001fff 000000000800000e 000000004a1710f0 0000000040b693c0\n[1274934.746891] r28-31 0000000000000001 0000000041f988b0 0000000041f98840 000000004a171118\n[1274934.746891] sr00-03 00000000066e5800 0000000000000000 0000000000000000 00000000066e5800\n[1274934.746891] sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n[1274934.746891]\n[1274934.746891] IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000406760e8 00000000406760ec\n[1274934.746891] IIR: 48780030 ISR: 0000000000000000 IOR: 0000004140000018\n[1274934.746891] CPU: 3 CR30: 00000040e3a9c000 CR31: ffffffffffffffff\n[1274934.746891] ORIG_R28: 0000000040acdd58\n[1274934.746891] IAOQ[0]: sba_unmap_sg+0xb0/0x118\n[1274934.746891] IAOQ[1]: sba_unmap_sg+0xb4/0x118\n[1274934.746891] RP(r2): sba_unmap_sg+0xac/0x118\n[1274934.746891] Backtrace:\n[1274934.746891] [<00000000402740cc>] dma_unmap_sg_attrs+0x6c/0x70\n[1274934.746891] [<000000004074d6bc>] scsi_dma_unmap+0x54/0x60\n[1274934.746891] [<00000000407a3488>] mptscsih_io_done+0x150/0xd70\n[1274934.746891] [<0000000040798600>] mpt_interrupt+0x168/0xa68\n[1274934.746891] [<0000000040255a48>] __handle_irq_event_percpu+0xc8/0x278\n[1274934.746891] [<0000000040255c34>] handle_irq_event_percpu+0x3c/0xd8\n[1274934.746891] [<000000004025ecb4>] handle_percpu_irq+0xb4/0xf0\n[1274934.746891] [<00000000402548e0>] generic_handle_irq+0x50/0x70\n[1274934.746891] [<000000004019a254>] call_on_stack+0x18/0x24\n[1274934.746891]\n[1274934.746891] Kernel panic - not syncing: Bad Address (null pointer deref?)\n\nThe bug is caused by overrunning the sglist and incorrectly testing\nsg_dma_len(sglist) before nents. Normally this doesn't cause a crash,\nbut in this case sglist crossed a page boundary. This occurs in the\nfollowing code:\n\n\twhile (sg_dma_len(sglist) && nents--) {\n\nThe fix is simply to test nents first and move the decrement of nents\ninto the loop."
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: parisc: corregir la falta de TLB de datos en sba_unmap_sg Rolf Eike Beer inform\u00f3 el siguiente error: [1274934.746891] Direcci\u00f3n incorrecta (\u00bfpuntero nulo deref?): C\u00f3digo = 15 (falla de falta de TLB de datos) en direcci\u00f3n 0000004140000018 [1274934.746891] CPU: 3 PID: 5549 Comunicaciones: cmake No contaminado 5.15.4-gentoo-parisc64 #4 [1274934.746891] Nombre de hardware: 9000/785/C8000 [1274934.746891 ] [1274934.746891] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI [1274934.746891] PSW: 000010000000010011111111000001110 No contaminado [1274934.746891] r00-03 000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000 [1274934.746891] r04-07 0b693c0 0000004140000000 000000004a2b08b0 0000000000000001 [1274934.746891] r08-11 0000000041f98810 0000000000000000 00000000 4a0a7000 0000000000000001 [1274934.746891] r12-15 0000000040bddbc0 0000000040c0cbc0 0000000040bddbc0 0000000040bddbc0 [1274934.746891 ] r16-19 0000000040bde3c0 0000000040bddbc0 0000000040bde3c0 0000000000000007 [1274934.746891] r20-23 0000000000000006 000000004a368950 0000000000000000 0000000000000001 [1274934.746891 ] r24-27 0000000000001fff 000000000800000e 000000004a1710f0 0000000040b693c0 [1274934.746891] r28-31 0000000000000001 00000000 41f988b0 0000000041f98840 000000004a171118 [1274934.746891] sr00-03 00000000066e5800 0000000000000000 0000000000000000 000000 00066e5800 [1274934.746891] sr04-07 0000000000000000 0000000000000000 00000000000000000 0000000000000000 [1274934.746891] [1274934.746891] IASQ: 0000000000000000 00000000000000000 IAOQ: 00000000406760e8 00000000406760 ec [1274934.746891] IIR: 48780030 ISR: 0000000000000000 IOR: 0000004140000018 [1274934.746891] CPU: 3 CR30: 00000040e3a9c000 CR31: 1274934.746891] ORIG_R28: 0000000040acdd58 [1274934.746891] IAOQ[ 0]: sba_unmap_sg+0xb0/0x118 [1274934.746891] IAOQ[1]: sba_unmap_sg+0xb4/0x118 [1274934.746891] RP(r2): sba_unmap_sg+0xac/0x118 [1274934.746891] seguimiento: [1274934.746891] [&lt;00000000402740cc&gt;] dma_unmap_sg_attrs+0x6c /0x70 [1274934.746891] [&lt;000000004074d6bc&gt;] scsi_dma_unmap+0x54/0x60 [1274934.746891] [&lt;00000000407a3488&gt;] mptscsih_io_done+0x150/0xd70 4.746891] [&lt;0000000040798600&gt;] mpt_interrupt+0x168/0xa68 [1274934.746891] [&lt;0000000040255a48&gt;] __handle_irq_event_percpu +0xc8/0x278 [1274934.746891] [&lt;0000000040255c34&gt;] handle_irq_event_percpu+0x3c/0xd8 [1274934.746891] [&lt;000000004025ecb4&gt;] handle_percpu_irq+0xb4/0xf0 [1 274934.746891] [&lt;00000000402548e0&gt;] generic_handle_irq+0x50/0x70 [1274934.746891] [&lt;000000004019a254&gt; ] call_on_stack+0x18/0x24 [1274934.746891] [1274934.746891] P\u00e1nico del kernel - no se sincroniza: Direcci\u00f3n incorrecta (\u00bfpuntero nulo deref?) El error se debe a que se sobrepasa sglist y se prueba incorrectamente sg_dma_len(sglist) antes de nents. Normalmente esto no causa un bloqueo, pero en este caso sglist cruz\u00f3 el l\u00edmite de una p\u00e1gina. Esto ocurre en el siguiente c\u00f3digo: while (sg_dma_len(sglist) &amp;&amp; nents--) { La soluci\u00f3n es simplemente probar nents primero y mover la disminuci\u00f3n de nents al bucle."
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/867e50231c7605547d9334904d70a181f39f2d9e",
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