CVE-2022-48750 (GCVE-0-2022-48750)
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2025-05-04 08:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (nct6775) Fix crash in clear_caseopen Paweł Marciniak reports the following crash, observed when clearing the chassis intrusion alarm. BUG: kernel NULL pointer dereference, address: 0000000000000028 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 3 PID: 4815 Comm: bash Tainted: G S 5.16.2-200.fc35.x86_64 #1 Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z97 Extreme4, BIOS P2.60A 05/03/2018 RIP: 0010:clear_caseopen+0x5a/0x120 [nct6775] Code: 68 70 e8 e9 32 b1 e3 85 c0 0f 85 d2 00 00 00 48 83 7c 24 ... RSP: 0018:ffffabcb02803dd8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff8e8808192880 RSI: 0000000000000000 RDI: ffff8e87c7509a68 RBP: 0000000000000000 R08: 0000000000000001 R09: 000000000000000a R10: 000000000000000a R11: f000000000000000 R12: 000000000000001f R13: ffff8e87c7509828 R14: ffff8e87c7509a68 R15: ffff8e88494527a0 FS: 00007f4db9151740(0000) GS:ffff8e8ebfec0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000028 CR3: 0000000166b66001 CR4: 00000000001706e0 Call Trace: <TASK> kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x10b/0x180 vfs_write+0x209/0x2a0 ksys_write+0x4f/0xc0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The problem is that the device passed to clear_caseopen() is the hwmon device, not the platform device, and the platform data is not set in the hwmon device. Store the pointer to sio_data in struct nct6775_data and get if from there if needed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79da533d3cc717ccc05ddbd3190da8a72bc2408bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cfb7d12f2e4a4d694f49e9b4ebb352f7b67cdfbbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/79da533d3cc717ccc05ddbd3190da8a72bc2408bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cfb7d12f2e4a4d694f49e9b4ebb352f7b67cdfbbPatch
Impacted products
Vendor Product Version
Linux Linux Version: 2e7b9886968b89f0b4cbc59b8e6ed47fd4edd0dd
Version: 2e7b9886968b89f0b4cbc59b8e6ed47fd4edd0dd
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   Linux Linux Version: 5.16
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