From 2ffa9a5d76a75abbc1f95c17959fced666095bdd Mon Sep 17 00:00:00 2001 From: Andreas Noever Date: Sun, 10 Apr 2016 12:48:27 +0200 Subject: [PATCH] thunderbolt: Fix double free of drom buffer If tb_drom_read() fails, sw->drom is freed but not set to NULL. sw->drom is then freed again in the error path of tb_switch_alloc(). The bug can be triggered by unplugging a thunderbolt device shortly after it is detected by the thunderbolt driver. Clear sw->drom if tb_drom_read() fails. [bhelgaas: add Fixes:, stable versions of interest] Fixes: 343fcb8c70d7 ("thunderbolt: Fix nontrivial endpoint devices.") Signed-off-by: Andreas Noever Signed-off-by: Bjorn Helgaas CC: stable@vger.kernel.org # v3.17+ CC: Lukas Wunner --- drivers/thunderbolt/eeprom.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c index 0c052e25c5bc..2b9602c2c355 100644 --- a/drivers/thunderbolt/eeprom.c +++ b/drivers/thunderbolt/eeprom.c @@ -449,6 +449,7 @@ int tb_drom_read(struct tb_switch *sw) return tb_drom_parse_entries(sw); err: kfree(sw->drom); + sw->drom = NULL; return -EIO; } -- 2.39.5