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| author | Tianyang Zhang <zhangtianyang@loongson.cn> | 2025-05-30 21:45:57 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-05-30 21:45:57 +0800 |
| commit | ee084fa96123ede8b0563a1b5a9b23adc43cd50d (patch) | |
| tree | 243c4f2b06d6a927e48e6c1efadd90f047133d66 /scripts/lib/kdoc/kdoc_files.py | |
| parent | LoongArch: Preserve firmware configuration when desired (diff) | |
| download | linux-ee084fa96123ede8b0563a1b5a9b23adc43cd50d.tar.gz linux-ee084fa96123ede8b0563a1b5a9b23adc43cd50d.zip | |
LoongArch: Fix panic caused by NULL-PMD in huge_pte_offset()
ERROR INFO:
CPU 25 Unable to handle kernel paging request at virtual address 0x0
...
Call Trace:
[<900000000023c30c>] huge_pte_offset+0x3c/0x58
[<900000000057fd4c>] hugetlb_follow_page_mask+0x74/0x438
[<900000000051fee8>] __get_user_pages+0xe0/0x4c8
[<9000000000522414>] faultin_page_range+0x84/0x380
[<9000000000564e8c>] madvise_vma_behavior+0x534/0xa48
[<900000000056689c>] do_madvise+0x1bc/0x3e8
[<9000000000566df4>] sys_madvise+0x24/0x38
[<90000000015b9e88>] do_syscall+0x78/0x98
[<9000000000221f18>] handle_syscall+0xb8/0x158
In some cases, pmd may be NULL and rely on NULL as the return value for
processing, so it is necessary to determine this situation here.
Cc: stable@vger.kernel.org
Fixes: bd51834d1cf6 ("LoongArch: Return NULL from huge_pte_offset() for invalid PMD")
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_files.py')
0 files changed, 0 insertions, 0 deletions