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| author | Nick Clifton <nickc@redhat.com> | 2017-06-15 11:52:02 +0100 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2017-06-15 11:52:02 +0100 |
| commit | 08c7881b814c546efc3996fd1decdf0877f7a779 (patch) | |
| tree | 3079daa6b2609cb1640640067beb800818a333b1 | |
| parent | 37de058ab2e9619fbb6dea52ec2773a5d65619c4 (diff) | |
| download | gdb-08c7881b814c546efc3996fd1decdf0877f7a779.zip gdb-08c7881b814c546efc3996fd1decdf0877f7a779.tar.gz gdb-08c7881b814c546efc3996fd1decdf0877f7a779.tar.bz2 | |
Prevent invalid array accesses when disassembling a corrupt bfin binary.
PR binutils/21586
* bfin-dis.c (gregs): Clip index to prevent overflow.
(regs): Likewise.
(regs_lo): Likewise.
(regs_hi): Likewise.
| -rw-r--r-- | opcodes/ChangeLog | 8 | ||||
| -rw-r--r-- | opcodes/bfin-dis.c | 8 |
2 files changed, 12 insertions, 4 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 14e2b7a..34b1844 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,11 @@ +2017-06-15 Nick Clifton <nickc@redhat.com> + + PR binutils/21586 + * bfin-dis.c (gregs): Clip index to prevent overflow. + (regs): Likewise. + (regs_lo): Likewise. + (regs_hi): Likewise. + 2017-06-14 Nick Clifton <nickc@redhat.com> PR binutils/21576 diff --git a/opcodes/bfin-dis.c b/opcodes/bfin-dis.c index bca68b4..e3f4622 100644 --- a/opcodes/bfin-dis.c +++ b/opcodes/bfin-dis.c @@ -350,7 +350,7 @@ static const enum machine_registers decode_gregs[] = REG_P0, REG_P1, REG_P2, REG_P3, REG_P4, REG_P5, REG_SP, REG_FP, }; -#define gregs(x, i) REGNAME (decode_gregs[((i) << 3) | (x)]) +#define gregs(x, i) REGNAME (decode_gregs[(((i) << 3) | (x)) & 15]) /* [dregs pregs (iregs mregs) (bregs lregs)]. */ static const enum machine_registers decode_regs[] = @@ -361,7 +361,7 @@ static const enum machine_registers decode_regs[] = REG_B0, REG_B1, REG_B2, REG_B3, REG_L0, REG_L1, REG_L2, REG_L3, }; -#define regs(x, i) REGNAME (decode_regs[((i) << 3) | (x)]) +#define regs(x, i) REGNAME (decode_regs[(((i) << 3) | (x)) & 31]) /* [dregs pregs (iregs mregs) (bregs lregs) Low Half]. */ static const enum machine_registers decode_regs_lo[] = @@ -372,7 +372,7 @@ static const enum machine_registers decode_regs_lo[] = REG_BL0, REG_BL1, REG_BL2, REG_BL3, REG_LL0, REG_LL1, REG_LL2, REG_LL3, }; -#define regs_lo(x, i) REGNAME (decode_regs_lo[((i) << 3) | (x)]) +#define regs_lo(x, i) REGNAME (decode_regs_lo[(((i) << 3) | (x)) & 31]) /* [dregs pregs (iregs mregs) (bregs lregs) High Half]. */ static const enum machine_registers decode_regs_hi[] = @@ -383,7 +383,7 @@ static const enum machine_registers decode_regs_hi[] = REG_BH0, REG_BH1, REG_BH2, REG_BH3, REG_LH0, REG_LH1, REG_LH2, REG_LH3, }; -#define regs_hi(x, i) REGNAME (decode_regs_hi[((i) << 3) | (x)]) +#define regs_hi(x, i) REGNAME (decode_regs_hi[(((i) << 3) | (x)) & 31]) static const enum machine_registers decode_statbits[] = { |