diff options
| author | Mariusz Kozlowski <mk@lab.zgora.pl> | 2010-11-22 11:37:21 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-11-22 11:37:21 -0800 |
| commit | ba5787323d38084b30261e84510d4a173fcb493a (patch) | |
| tree | 8d3c718f5627ac5898bcd56a993e6aca944dabfc /drivers/ide | |
| parent | dd8717da6da9b0e745df49762be4573010f1013c (diff) | |
| download | lwn-ba5787323d38084b30261e84510d4a173fcb493a.tar.gz lwn-ba5787323d38084b30261e84510d4a173fcb493a.zip | |
ide: fix use after free in ide-acpi
out_obj points to kfreed memory and we dereference that pointer in
DEBPRINT/printk.
Signed-off-by: Mariusz Kozlowski <mk@lab.zgora.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide')
| -rw-r--r-- | drivers/ide/ide-acpi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c index c26c11905ffe..2af8cb460a3b 100644 --- a/drivers/ide/ide-acpi.c +++ b/drivers/ide/ide-acpi.c @@ -416,21 +416,21 @@ void ide_acpi_get_timing(ide_hwif_t *hwif) out_obj = output.pointer; if (out_obj->type != ACPI_TYPE_BUFFER) { - kfree(output.pointer); DEBPRINT("Run _GTM: error: " "expected object type of ACPI_TYPE_BUFFER, " "got 0x%x\n", out_obj->type); + kfree(output.pointer); return; } if (!out_obj->buffer.length || !out_obj->buffer.pointer || out_obj->buffer.length != sizeof(struct GTM_buffer)) { - kfree(output.pointer); printk(KERN_ERR "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " "addr (0x%p)\n", __func__, out_obj->buffer.length, sizeof(struct GTM_buffer), out_obj->buffer.pointer); + kfree(output.pointer); return; } |