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"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: fix gup_pud_range() for dax\n\nFor dax pud, pud_huge() returns true on x86. So the function works as long\nas hugetlb is configured. However, dax doesn't depend on hugetlb.\nCommit 414fd080d125 (\"mm/gup: fix gup_pmd_range() for dax\") fixed\ndevmap-backed huge PMDs, but missed devmap-backed huge PUDs. Fix this as\nwell.\n\nThis fixes the below kernel panic:\n\ngeneral protection fault, probably for non-canonical address 0x69e7c000cc478: 0000 [#1] SMP\n\t< snip >\nCall Trace:\n\nget_user_pages_fast+0x1f/0x40\niov_iter_get_pages+0xc6/0x3b0\n? mempool_alloc+0x5d/0x170\nbio_iov_iter_get_pages+0x82/0x4e0\n? bvec_alloc+0x91/0xc0\n? bio_alloc_bioset+0x19a/0x2a0\nblkdev_direct_IO+0x282/0x480\n? __io_complete_rw_common+0xc0/0xc0\n? filemap_range_has_page+0x82/0xc0\ngeneric_file_direct_write+0x9d/0x1a0\n? inode_update_time+0x24/0x30\n__generic_file_write_iter+0xbd/0x1e0\nblkdev_write_iter+0xb4/0x150\n? io_import_iovec+0x8d/0x340\nio_write+0xf9/0x300\nio_issue_sqe+0x3c3/0x1d30\n? sysvec_reschedule_ipi+0x6c/0x80\n__io_queue_sqe+0x33/0x240\n? fget+0x76/0xa0\nio_submit_sqes+0xe6a/0x18d0\n? __fget_light+0xd1/0x100\n__x64_sys_io_uring_enter+0x199/0x880\n? __context_tracking_enter+0x1f/0x70\n? irqentry_exit_to_user_mode+0x24/0x30\n? irqentry_exit+0x1d/0x30\n? __context_tracking_exit+0xe/0x70\ndo_syscall_64+0x3b/0x90\nentry_SYSCALL_64_after_hwframe+0x61/0xcb\nRIP: 0033:0x7fc97c11a7be\n\t< snip >\n\n---[ end trace 48b2e0e67debcaeb ]---\nRIP: 0010:internal_get_user_pages_fast+0x340/0x990\n\t< snip >\nKernel panic - not syncing: Fatal exception\nKernel Offset: disabled",
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"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: fix gup_pud_range() for dax\n\nFor dax pud, pud_huge() returns true on x86. So the function works as long\nas hugetlb is configured. However, dax doesn't depend on hugetlb.\nCommit 414fd080d125 (\"mm/gup: fix gup_pmd_range() for dax\") fixed\ndevmap-backed huge PMDs, but missed devmap-backed huge PUDs. Fix this as\nwell.\n\nThis fixes the below kernel panic:\n\ngeneral protection fault, probably for non-canonical address 0x69e7c000cc478: 0000 [#1] SMP\n\t< snip >\nCall Trace:\n\nget_user_pages_fast+0x1f/0x40\niov_iter_get_pages+0xc6/0x3b0\n? mempool_alloc+0x5d/0x170\nbio_iov_iter_get_pages+0x82/0x4e0\n? bvec_alloc+0x91/0xc0\n? bio_alloc_bioset+0x19a/0x2a0\nblkdev_direct_IO+0x282/0x480\n? __io_complete_rw_common+0xc0/0xc0\n? filemap_range_has_page+0x82/0xc0\ngeneric_file_direct_write+0x9d/0x1a0\n? inode_update_time+0x24/0x30\n__generic_file_write_iter+0xbd/0x1e0\nblkdev_write_iter+0xb4/0x150\n? io_import_iovec+0x8d/0x340\nio_write+0xf9/0x300\nio_issue_sqe+0x3c3/0x1d30\n? sysvec_reschedule_ipi+0x6c/0x80\n__io_queue_sqe+0x33/0x240\n? fget+0x76/0xa0\nio_submit_sqes+0xe6a/0x18d0\n? __fget_light+0xd1/0x100\n__x64_sys_io_uring_enter+0x199/0x880\n? __context_tracking_enter+0x1f/0x70\n? irqentry_exit_to_user_mode+0x24/0x30\n? irqentry_exit+0x1d/0x30\n? __context_tracking_exit+0xe/0x70\ndo_syscall_64+0x3b/0x90\nentry_SYSCALL_64_after_hwframe+0x61/0xcb\nRIP: 0033:0x7fc97c11a7be\n\t< snip >\n\n---[ end trace 48b2e0e67debcaeb ]---\nRIP: 0010:internal_get_user_pages_fast+0x340/0x990\n\t< snip >\nKernel panic - not syncing: Fatal exception\nKernel Offset: disabled",
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"title":"Vulnerability Description"
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"openEuler-22.03-LTS-SP1:perf-5.10.0-136.99.0.180.oe2203sp1.x86_64",
"openEuler-22.03-LTS-SP1:perf-debuginfo-5.10.0-136.99.0.180.oe2203sp1.x86_64",
"openEuler-22.03-LTS-SP1:python3-perf-5.10.0-136.99.0.180.oe2203sp1.x86_64",
"openEuler-22.03-LTS-SP1:python3-perf-debuginfo-5.10.0-136.99.0.180.oe2203sp1.x86_64"
]
}
],
"threats":[
{
"details":"Medium",
"category":"impact"
}
],
"title":"CVE-2022-48986"
}
]
}