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| author | Mark Wielaard <mark@klomp.org> | 2020-04-16 15:41:57 +0200 |
|---|---|---|
| committer | Mark Wielaard <mark@klomp.org> | 2020-04-21 22:23:18 +0200 |
| commit | 25d40a626d36c140c8bb309f410f25af2836ec9b (patch) | |
| tree | f6eb22b1d1ad991853080232802dbc940956431f /libcpu/i386_disasm.c | |
| parent | 39f28eaf8c821d71d57ffc759655ec4168d0bead (diff) | |
| download | elfutils-25d40a626d36c140c8bb309f410f25af2836ec9b.tar.gz | |
libcpu: Replace assert with goto invalid_op for bad prefix.
https://sourceware.org/bugzilla/show_bug.cgi?id=25831
Signed-off-by: Mark Wielaard <mark@klomp.org>
Diffstat (limited to 'libcpu/i386_disasm.c')
| -rw-r--r-- | libcpu/i386_disasm.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/libcpu/i386_disasm.c b/libcpu/i386_disasm.c index 4422ffa2..32df8cd0 100644 --- a/libcpu/i386_disasm.c +++ b/libcpu/i386_disasm.c @@ -407,7 +407,8 @@ i386_disasm (Ebl *ebl __attribute__((unused)), ++curr; - assert (last_prefix_bit != 0); + if (last_prefix_bit == 0) + goto invalid_op; correct_prefix = last_prefix_bit; } @@ -445,8 +446,8 @@ i386_disasm (Ebl *ebl __attribute__((unused)), the input data. */ goto do_ret; - assert (correct_prefix == 0 - || (prefixes & correct_prefix) != 0); + if (correct_prefix != 0 && (prefixes & correct_prefix) == 0) + goto invalid_op; prefixes ^= correct_prefix; if (0) @@ -473,7 +474,8 @@ i386_disasm (Ebl *ebl __attribute__((unused)), if (data == end) { - assert (prefixes != 0); + if (prefixes == 0) + goto invalid_op; goto print_prefix; } @@ -1125,6 +1127,7 @@ i386_disasm (Ebl *ebl __attribute__((unused)), } /* Invalid (or at least unhandled) opcode. */ + invalid_op: if (prefixes != 0) goto print_prefix; /* Make sure we get past the unrecognized opcode if we haven't yet. */ |