diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/kernel/unwind.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c index 9f9ecc15556e..cf2828ab0905 100644 --- a/arch/arc/kernel/unwind.c +++ b/arch/arc/kernel/unwind.c @@ -293,13 +293,13 @@ static void init_unwind_hdr(struct unwind_table *table, const u32 *cie = cie_for_fde(fde, table); signed ptrType; - if (cie == ¬_fde) + if (cie == ¬_fde) /* only process FDE here */ continue; if (cie == NULL || cie == &bad_cie) - return; + continue; /* say FDE->CIE.version != 1 */ ptrType = fde_pointer_type(cie); if (ptrType < 0) - return; + continue; ptr = (const u8 *)(fde + 2); if (!read_pointer(&ptr, (const u8 *)(fde + 1) + *fde, @@ -343,6 +343,10 @@ static void init_unwind_hdr(struct unwind_table *table, if (fde[1] == 0xffffffff) continue; /* this is a CIE */ + + if (*(u8 *)(cie + 2) != 1) + continue; /* FDE->CIE.version not supported */ + ptr = (const u8 *)(fde + 2); header->table[n].start = read_pointer(&ptr, (const u8 *)(fde + 1) + @@ -519,7 +523,8 @@ static const u32 *cie_for_fde(const u32 *fde, const struct unwind_table *table) if (*cie <= sizeof(*cie) + 4 || *cie >= fde[1] - sizeof(*fde) || (*cie & (sizeof(*cie) - 1)) - || (cie[1] != 0xffffffff)) + || (cie[1] != 0xffffffff) + || ( *(u8 *)(cie + 2) != 1)) /* version 1 supported */ return NULL; /* this is not a (valid) CIE */ return cie; } |