In the Linux kernel, the following vulnerability has been resolved:
parisc: Fix data TLB miss in sba_unmap_sg
Rolf Eike Beer reported the following bug:
[1274934.746891] Bad Address (null pointer deref?): Code=15 (Data TLB miss fault) at addr 0000004140000018
[1274934.746891] CPU: 3 PID: 5549 Comm: cmake Not tainted 5.15.4-gentoo-parisc64 #4
[1274934.746891] Hardware name: 9000/785/C8000
[1274934.746891]
[1274934.746891] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
[1274934.746891] PSW: 00001000000001001111111000001110 Not tainted
[1274934.746891] r00-03 000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000
[1274934.746891] r04-07 0000000040b693c0 0000004140000000 000000004a2b08b0 0000000000000001
[1274934.746891] r08-11 0000000041f98810 0000000000000000 000000004a0a7000 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 0000000041f988b0 0000000041f98840 000000004a171118
[1274934.746891] sr00-03 00000000066e5800 0000000000000000 0000000000000000 00000000066e5800
[1274934.746891] sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[1274934.746891]
[1274934.746891] IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000406760e8 00000000406760ec
[1274934.746891] IIR: 48780030 ISR: 0000000000000000 IOR: 0000004140000018
[1274934.746891] CPU: 3 CR30: 00000040e3a9c000 CR31: ffffffffffffffff
[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] Backtrace:
[1274934.746891] [<00000000402740cc>] dma_unmap_sg_attrs+0x6c/0x70
[1274934.746891] [<000000004074d6bc>] scsi_dma_unmap+0x54/0x60
[1274934.746891] [<00000000407a3488>] mptscsih_io_done+0x150/0xd70
[1274934.746891] [<0000000040798600>] mpt_interrupt+0x168/0xa68
[1274934.746891] [<0000000040255a48>] __handle_irq_event_percpu+0xc8/0x278
[1274934.746891] [<0000000040255c34>] handle_irq_event_percpu+0x3c/0xd8
[1274934.746891] [<000000004025ecb4>] handle_percpu_irq+0xb4/0xf0
[1274934.746891] [<00000000402548e0>] generic_handle_irq+0x50/0x70
[1274934.746891] [<000000004019a254>] call_on_stack+0x18/0x24
[1274934.746891]
[1274934.746891] Kernel panic - not syncing: Bad Address (null pointer deref?)
The bug is caused by overrunning the sglist and incorrectly testing
sg_dma_len(sglist) before nents. Normally this doesn't cause a crash,
but in this case sglist crossed a page boundary. This occurs in the
following code:
while (sg_dma_len(sglist) && nents--) {
The fix is simply to test nents first and move the decrement of nents
into the loop.
References
Configurations
Configuration 1 (hide)
|
History
03 Oct 2025, 14:03
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/867e50231c7605547d9334904d70a181f39f2d9e - Patch | |
| References | () https://git.kernel.org/stable/c/8c8e949ae81e7f5ab58f9f9f8e9b573b93173dd2 - Patch | |
| References | () https://git.kernel.org/stable/c/b7d6f44a0fa716a82969725516dc0b16bc7cd514 - Patch | |
| References | () https://git.kernel.org/stable/c/de75676ee99bf9f25b1124ff301b3f7b8ba597d4 - Patch | |
| References | () https://git.kernel.org/stable/c/e40ae3133ed87d6d526f3c8fc6a5f9a2d72dcdbf - Patch | |
| References | () https://git.kernel.org/stable/c/efccc9b0c7e28d0eb7918a236e59f60dc23db4c3 - Patch | |
| References | () https://git.kernel.org/stable/c/f23f0444ead4d941165aa82ce2fcbb997dc00e97 - Patch | |
| References | () https://git.kernel.org/stable/c/f8f519d7df66c334b5e08f896ac70ee3b53add3b - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.17:rc4:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | NVD-CWE-noinfo |
21 Nov 2024, 07:34
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/867e50231c7605547d9334904d70a181f39f2d9e - | |
| References | () https://git.kernel.org/stable/c/8c8e949ae81e7f5ab58f9f9f8e9b573b93173dd2 - | |
| References | () https://git.kernel.org/stable/c/b7d6f44a0fa716a82969725516dc0b16bc7cd514 - | |
| References | () https://git.kernel.org/stable/c/de75676ee99bf9f25b1124ff301b3f7b8ba597d4 - | |
| References | () https://git.kernel.org/stable/c/e40ae3133ed87d6d526f3c8fc6a5f9a2d72dcdbf - | |
| References | () https://git.kernel.org/stable/c/efccc9b0c7e28d0eb7918a236e59f60dc23db4c3 - | |
| References | () https://git.kernel.org/stable/c/f23f0444ead4d941165aa82ce2fcbb997dc00e97 - | |
| References | () https://git.kernel.org/stable/c/f8f519d7df66c334b5e08f896ac70ee3b53add3b - | |
| Summary |
|
16 Jul 2024, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-07-16 12:15
Updated : 2025-10-03 14:03
NVD link : CVE-2022-48795
Mitre link : CVE-2022-48795
CVE.ORG link : CVE-2022-48795
JSON object : View
Products Affected
linux
- linux_kernel
CWE