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| author | Nick Clifton <nickc@redhat.com> | 2019-05-14 12:42:02 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2019-05-14 12:42:02 +0100 |
| commit | 35015cd193be5e603ed31c14472d2d9d17e14e7a (patch) | |
| tree | 33e9f0b6e6046018a72fc685b3ad787c7ce9713c /gas | |
| parent | 37d0d09177dc02e0002ab8b90d9b7bc402af9240 (diff) | |
| download | gdb-35015cd193be5e603ed31c14472d2d9d17e14e7a.zip gdb-35015cd193be5e603ed31c14472d2d9d17e14e7a.tar.gz gdb-35015cd193be5e603ed31c14472d2d9d17e14e7a.tar.bz2 | |
Fix illegal memory access triggered when attempting to assemble a bogus i386 source file.
PR 24538
* config/tc-i386-intel.c (i386_intel_simplify_register): Reject
illegal register numbers.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/ChangeLog | 6 | ||||
| -rw-r--r-- | gas/config/tc-i386-intel.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 57be175..1530ebf 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,9 @@ +2019-05-14 Nick Clifton <nickc@redhat.com> + + PR 24538 + * config/tc-i386-intel.c (i386_intel_simplify_register): Reject + illegal register numbers. + 2019-05-10 Nick Clifton <nickc@redhat.com> PR 24538 diff --git a/gas/config/tc-i386-intel.c b/gas/config/tc-i386-intel.c index a12886d..a2cd286 100644 --- a/gas/config/tc-i386-intel.c +++ b/gas/config/tc-i386-intel.c @@ -270,6 +270,12 @@ i386_intel_simplify_register (expressionS *e) else reg_num = e->X_md - 1; + if (reg_num < 0 || reg_num >= (int) i386_regtab_size) + { + as_bad (_("invalid register number")); + return 0; + } + if (!intel_state.in_bracket) { if (i.op[this_operand].regs) |